| 1 | /* DWARF 2 debugging format support for GDB. |
| 2 | |
| 3 | Copyright (C) 1994-2018 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 "bfd.h" |
| 33 | #include "elf-bfd.h" |
| 34 | #include "symtab.h" |
| 35 | #include "gdbtypes.h" |
| 36 | #include "objfiles.h" |
| 37 | #include "dwarf2.h" |
| 38 | #include "buildsym.h" |
| 39 | #include "demangle.h" |
| 40 | #include "gdb-demangle.h" |
| 41 | #include "expression.h" |
| 42 | #include "filenames.h" /* for DOSish file names */ |
| 43 | #include "macrotab.h" |
| 44 | #include "language.h" |
| 45 | #include "complaints.h" |
| 46 | #include "bcache.h" |
| 47 | #include "dwarf2expr.h" |
| 48 | #include "dwarf2loc.h" |
| 49 | #include "cp-support.h" |
| 50 | #include "hashtab.h" |
| 51 | #include "command.h" |
| 52 | #include "gdbcmd.h" |
| 53 | #include "block.h" |
| 54 | #include "addrmap.h" |
| 55 | #include "typeprint.h" |
| 56 | #include "psympriv.h" |
| 57 | #include <sys/stat.h> |
| 58 | #include "completer.h" |
| 59 | #include "vec.h" |
| 60 | #include "c-lang.h" |
| 61 | #include "go-lang.h" |
| 62 | #include "valprint.h" |
| 63 | #include "gdbcore.h" /* for gnutarget */ |
| 64 | #include "gdb/gdb-index.h" |
| 65 | #include <ctype.h> |
| 66 | #include "gdb_bfd.h" |
| 67 | #include "f-lang.h" |
| 68 | #include "source.h" |
| 69 | #include "filestuff.h" |
| 70 | #include "build-id.h" |
| 71 | #include "namespace.h" |
| 72 | #include "common/gdb_unlinker.h" |
| 73 | #include "common/function-view.h" |
| 74 | #include "common/gdb_optional.h" |
| 75 | #include "common/underlying.h" |
| 76 | #include "common/byte-vector.h" |
| 77 | #include "common/hash_enum.h" |
| 78 | #include "filename-seen-cache.h" |
| 79 | #include "producer.h" |
| 80 | #include <fcntl.h> |
| 81 | #include <sys/types.h> |
| 82 | #include <algorithm> |
| 83 | #include <unordered_set> |
| 84 | #include <unordered_map> |
| 85 | #include "selftest.h" |
| 86 | #include <cmath> |
| 87 | #include <set> |
| 88 | #include <forward_list> |
| 89 | |
| 90 | /* When == 1, print basic high level tracing messages. |
| 91 | When > 1, be more verbose. |
| 92 | This is in contrast to the low level DIE reading of dwarf_die_debug. */ |
| 93 | static unsigned int dwarf_read_debug = 0; |
| 94 | |
| 95 | /* When non-zero, dump DIEs after they are read in. */ |
| 96 | static unsigned int dwarf_die_debug = 0; |
| 97 | |
| 98 | /* When non-zero, dump line number entries as they are read in. */ |
| 99 | static unsigned int dwarf_line_debug = 0; |
| 100 | |
| 101 | /* When non-zero, cross-check physname against demangler. */ |
| 102 | static int check_physname = 0; |
| 103 | |
| 104 | /* When non-zero, do not reject deprecated .gdb_index sections. */ |
| 105 | static int use_deprecated_index_sections = 0; |
| 106 | |
| 107 | static const struct objfile_data *dwarf2_objfile_data_key; |
| 108 | |
| 109 | /* The "aclass" indices for various kinds of computed DWARF symbols. */ |
| 110 | |
| 111 | static int dwarf2_locexpr_index; |
| 112 | static int dwarf2_loclist_index; |
| 113 | static int dwarf2_locexpr_block_index; |
| 114 | static int dwarf2_loclist_block_index; |
| 115 | |
| 116 | /* A descriptor for dwarf sections. |
| 117 | |
| 118 | S.ASECTION, SIZE are typically initialized when the objfile is first |
| 119 | scanned. BUFFER, READIN are filled in later when the section is read. |
| 120 | If the section contained compressed data then SIZE is updated to record |
| 121 | the uncompressed size of the section. |
| 122 | |
| 123 | DWP file format V2 introduces a wrinkle that is easiest to handle by |
| 124 | creating the concept of virtual sections contained within a real section. |
| 125 | In DWP V2 the sections of the input DWO files are concatenated together |
| 126 | into one section, but section offsets are kept relative to the original |
| 127 | input section. |
| 128 | If this is a virtual dwp-v2 section, S.CONTAINING_SECTION is a backlink to |
| 129 | the real section this "virtual" section is contained in, and BUFFER,SIZE |
| 130 | describe the virtual section. */ |
| 131 | |
| 132 | struct dwarf2_section_info |
| 133 | { |
| 134 | union |
| 135 | { |
| 136 | /* If this is a real section, the bfd section. */ |
| 137 | asection *section; |
| 138 | /* If this is a virtual section, pointer to the containing ("real") |
| 139 | section. */ |
| 140 | struct dwarf2_section_info *containing_section; |
| 141 | } s; |
| 142 | /* Pointer to section data, only valid if readin. */ |
| 143 | const gdb_byte *buffer; |
| 144 | /* The size of the section, real or virtual. */ |
| 145 | bfd_size_type size; |
| 146 | /* If this is a virtual section, the offset in the real section. |
| 147 | Only valid if is_virtual. */ |
| 148 | bfd_size_type virtual_offset; |
| 149 | /* True if we have tried to read this section. */ |
| 150 | char readin; |
| 151 | /* True if this is a virtual section, False otherwise. |
| 152 | This specifies which of s.section and s.containing_section to use. */ |
| 153 | char is_virtual; |
| 154 | }; |
| 155 | |
| 156 | typedef struct dwarf2_section_info dwarf2_section_info_def; |
| 157 | DEF_VEC_O (dwarf2_section_info_def); |
| 158 | |
| 159 | /* All offsets in the index are of this type. It must be |
| 160 | architecture-independent. */ |
| 161 | typedef uint32_t offset_type; |
| 162 | |
| 163 | DEF_VEC_I (offset_type); |
| 164 | |
| 165 | /* Ensure only legit values are used. */ |
| 166 | #define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \ |
| 167 | do { \ |
| 168 | gdb_assert ((unsigned int) (value) <= 1); \ |
| 169 | GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \ |
| 170 | } while (0) |
| 171 | |
| 172 | /* Ensure only legit values are used. */ |
| 173 | #define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \ |
| 174 | do { \ |
| 175 | gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \ |
| 176 | && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \ |
| 177 | GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \ |
| 178 | } while (0) |
| 179 | |
| 180 | /* Ensure we don't use more than the alloted nuber of bits for the CU. */ |
| 181 | #define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \ |
| 182 | do { \ |
| 183 | gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \ |
| 184 | GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \ |
| 185 | } while (0) |
| 186 | |
| 187 | #if WORDS_BIGENDIAN |
| 188 | |
| 189 | /* Convert VALUE between big- and little-endian. */ |
| 190 | |
| 191 | static offset_type |
| 192 | byte_swap (offset_type value) |
| 193 | { |
| 194 | offset_type result; |
| 195 | |
| 196 | result = (value & 0xff) << 24; |
| 197 | result |= (value & 0xff00) << 8; |
| 198 | result |= (value & 0xff0000) >> 8; |
| 199 | result |= (value & 0xff000000) >> 24; |
| 200 | return result; |
| 201 | } |
| 202 | |
| 203 | #define MAYBE_SWAP(V) byte_swap (V) |
| 204 | |
| 205 | #else |
| 206 | #define MAYBE_SWAP(V) static_cast<offset_type> (V) |
| 207 | #endif /* WORDS_BIGENDIAN */ |
| 208 | |
| 209 | /* An index into a (C++) symbol name component in a symbol name as |
| 210 | recorded in the mapped_index's symbol table. For each C++ symbol |
| 211 | in the symbol table, we record one entry for the start of each |
| 212 | component in the symbol in a table of name components, and then |
| 213 | sort the table, in order to be able to binary search symbol names, |
| 214 | ignoring leading namespaces, both completion and regular look up. |
| 215 | For example, for symbol "A::B::C", we'll have an entry that points |
| 216 | to "A::B::C", another that points to "B::C", and another for "C". |
| 217 | Note that function symbols in GDB index have no parameter |
| 218 | information, just the function/method names. You can convert a |
| 219 | name_component to a "const char *" using the |
| 220 | 'mapped_index::symbol_name_at(offset_type)' method. */ |
| 221 | |
| 222 | struct name_component |
| 223 | { |
| 224 | /* Offset in the symbol name where the component starts. Stored as |
| 225 | a (32-bit) offset instead of a pointer to save memory and improve |
| 226 | locality on 64-bit architectures. */ |
| 227 | offset_type name_offset; |
| 228 | |
| 229 | /* The symbol's index in the symbol and constant pool tables of a |
| 230 | mapped_index. */ |
| 231 | offset_type idx; |
| 232 | }; |
| 233 | |
| 234 | /* Base class containing bits shared by both .gdb_index and |
| 235 | .debug_name indexes. */ |
| 236 | |
| 237 | struct mapped_index_base |
| 238 | { |
| 239 | /* The name_component table (a sorted vector). See name_component's |
| 240 | description above. */ |
| 241 | std::vector<name_component> name_components; |
| 242 | |
| 243 | /* How NAME_COMPONENTS is sorted. */ |
| 244 | enum case_sensitivity name_components_casing; |
| 245 | |
| 246 | /* Return the number of names in the symbol table. */ |
| 247 | virtual size_t symbol_name_count () const = 0; |
| 248 | |
| 249 | /* Get the name of the symbol at IDX in the symbol table. */ |
| 250 | virtual const char *symbol_name_at (offset_type idx) const = 0; |
| 251 | |
| 252 | /* Return whether the name at IDX in the symbol table should be |
| 253 | ignored. */ |
| 254 | virtual bool symbol_name_slot_invalid (offset_type idx) const |
| 255 | { |
| 256 | return false; |
| 257 | } |
| 258 | |
| 259 | /* Build the symbol name component sorted vector, if we haven't |
| 260 | yet. */ |
| 261 | void build_name_components (); |
| 262 | |
| 263 | /* Returns the lower (inclusive) and upper (exclusive) bounds of the |
| 264 | possible matches for LN_NO_PARAMS in the name component |
| 265 | vector. */ |
| 266 | std::pair<std::vector<name_component>::const_iterator, |
| 267 | std::vector<name_component>::const_iterator> |
| 268 | find_name_components_bounds (const lookup_name_info &ln_no_params) const; |
| 269 | |
| 270 | /* Prevent deleting/destroying via a base class pointer. */ |
| 271 | protected: |
| 272 | ~mapped_index_base() = default; |
| 273 | }; |
| 274 | |
| 275 | /* A description of the mapped index. The file format is described in |
| 276 | a comment by the code that writes the index. */ |
| 277 | struct mapped_index final : public mapped_index_base |
| 278 | { |
| 279 | /* A slot/bucket in the symbol table hash. */ |
| 280 | struct symbol_table_slot |
| 281 | { |
| 282 | const offset_type name; |
| 283 | const offset_type vec; |
| 284 | }; |
| 285 | |
| 286 | /* Index data format version. */ |
| 287 | int version; |
| 288 | |
| 289 | /* The total length of the buffer. */ |
| 290 | off_t total_size; |
| 291 | |
| 292 | /* The address table data. */ |
| 293 | gdb::array_view<const gdb_byte> address_table; |
| 294 | |
| 295 | /* The symbol table, implemented as a hash table. */ |
| 296 | gdb::array_view<symbol_table_slot> symbol_table; |
| 297 | |
| 298 | /* A pointer to the constant pool. */ |
| 299 | const char *constant_pool; |
| 300 | |
| 301 | bool symbol_name_slot_invalid (offset_type idx) const override |
| 302 | { |
| 303 | const auto &bucket = this->symbol_table[idx]; |
| 304 | return bucket.name == 0 && bucket.vec; |
| 305 | } |
| 306 | |
| 307 | /* Convenience method to get at the name of the symbol at IDX in the |
| 308 | symbol table. */ |
| 309 | const char *symbol_name_at (offset_type idx) const override |
| 310 | { return this->constant_pool + MAYBE_SWAP (this->symbol_table[idx].name); } |
| 311 | |
| 312 | size_t symbol_name_count () const override |
| 313 | { return this->symbol_table.size (); } |
| 314 | }; |
| 315 | |
| 316 | /* A description of the mapped .debug_names. |
| 317 | Uninitialized map has CU_COUNT 0. */ |
| 318 | struct mapped_debug_names final : public mapped_index_base |
| 319 | { |
| 320 | mapped_debug_names (struct dwarf2_per_objfile *dwarf2_per_objfile_) |
| 321 | : dwarf2_per_objfile (dwarf2_per_objfile_) |
| 322 | {} |
| 323 | |
| 324 | struct dwarf2_per_objfile *dwarf2_per_objfile; |
| 325 | bfd_endian dwarf5_byte_order; |
| 326 | bool dwarf5_is_dwarf64; |
| 327 | bool augmentation_is_gdb; |
| 328 | uint8_t offset_size; |
| 329 | uint32_t cu_count = 0; |
| 330 | uint32_t tu_count, bucket_count, name_count; |
| 331 | const gdb_byte *cu_table_reordered, *tu_table_reordered; |
| 332 | const uint32_t *bucket_table_reordered, *hash_table_reordered; |
| 333 | const gdb_byte *name_table_string_offs_reordered; |
| 334 | const gdb_byte *name_table_entry_offs_reordered; |
| 335 | const gdb_byte *entry_pool; |
| 336 | |
| 337 | struct index_val |
| 338 | { |
| 339 | ULONGEST dwarf_tag; |
| 340 | struct attr |
| 341 | { |
| 342 | /* Attribute name DW_IDX_*. */ |
| 343 | ULONGEST dw_idx; |
| 344 | |
| 345 | /* Attribute form DW_FORM_*. */ |
| 346 | ULONGEST form; |
| 347 | |
| 348 | /* Value if FORM is DW_FORM_implicit_const. */ |
| 349 | LONGEST implicit_const; |
| 350 | }; |
| 351 | std::vector<attr> attr_vec; |
| 352 | }; |
| 353 | |
| 354 | std::unordered_map<ULONGEST, index_val> abbrev_map; |
| 355 | |
| 356 | const char *namei_to_name (uint32_t namei) const; |
| 357 | |
| 358 | /* Implementation of the mapped_index_base virtual interface, for |
| 359 | the name_components cache. */ |
| 360 | |
| 361 | const char *symbol_name_at (offset_type idx) const override |
| 362 | { return namei_to_name (idx); } |
| 363 | |
| 364 | size_t symbol_name_count () const override |
| 365 | { return this->name_count; } |
| 366 | }; |
| 367 | |
| 368 | typedef struct dwarf2_per_cu_data *dwarf2_per_cu_ptr; |
| 369 | DEF_VEC_P (dwarf2_per_cu_ptr); |
| 370 | |
| 371 | struct tu_stats |
| 372 | { |
| 373 | int nr_uniq_abbrev_tables; |
| 374 | int nr_symtabs; |
| 375 | int nr_symtab_sharers; |
| 376 | int nr_stmt_less_type_units; |
| 377 | int nr_all_type_units_reallocs; |
| 378 | }; |
| 379 | |
| 380 | /* Collection of data recorded per objfile. |
| 381 | This hangs off of dwarf2_objfile_data_key. */ |
| 382 | |
| 383 | struct dwarf2_per_objfile |
| 384 | { |
| 385 | /* Construct a dwarf2_per_objfile for OBJFILE. NAMES points to the |
| 386 | dwarf2 section names, or is NULL if the standard ELF names are |
| 387 | used. */ |
| 388 | dwarf2_per_objfile (struct objfile *objfile, |
| 389 | const dwarf2_debug_sections *names); |
| 390 | |
| 391 | ~dwarf2_per_objfile (); |
| 392 | |
| 393 | DISABLE_COPY_AND_ASSIGN (dwarf2_per_objfile); |
| 394 | |
| 395 | /* Free all cached compilation units. */ |
| 396 | void free_cached_comp_units (); |
| 397 | private: |
| 398 | /* This function is mapped across the sections and remembers the |
| 399 | offset and size of each of the debugging sections we are |
| 400 | interested in. */ |
| 401 | void locate_sections (bfd *abfd, asection *sectp, |
| 402 | const dwarf2_debug_sections &names); |
| 403 | |
| 404 | public: |
| 405 | dwarf2_section_info info {}; |
| 406 | dwarf2_section_info abbrev {}; |
| 407 | dwarf2_section_info line {}; |
| 408 | dwarf2_section_info loc {}; |
| 409 | dwarf2_section_info loclists {}; |
| 410 | dwarf2_section_info macinfo {}; |
| 411 | dwarf2_section_info macro {}; |
| 412 | dwarf2_section_info str {}; |
| 413 | dwarf2_section_info line_str {}; |
| 414 | dwarf2_section_info ranges {}; |
| 415 | dwarf2_section_info rnglists {}; |
| 416 | dwarf2_section_info addr {}; |
| 417 | dwarf2_section_info frame {}; |
| 418 | dwarf2_section_info eh_frame {}; |
| 419 | dwarf2_section_info gdb_index {}; |
| 420 | dwarf2_section_info debug_names {}; |
| 421 | dwarf2_section_info debug_aranges {}; |
| 422 | |
| 423 | VEC (dwarf2_section_info_def) *types = NULL; |
| 424 | |
| 425 | /* Back link. */ |
| 426 | struct objfile *objfile = NULL; |
| 427 | |
| 428 | /* Table of all the compilation units. This is used to locate |
| 429 | the target compilation unit of a particular reference. */ |
| 430 | struct dwarf2_per_cu_data **all_comp_units = NULL; |
| 431 | |
| 432 | /* The number of compilation units in ALL_COMP_UNITS. */ |
| 433 | int n_comp_units = 0; |
| 434 | |
| 435 | /* The number of .debug_types-related CUs. */ |
| 436 | int n_type_units = 0; |
| 437 | |
| 438 | /* The number of elements allocated in all_type_units. |
| 439 | If there are skeleton-less TUs, we add them to all_type_units lazily. */ |
| 440 | int n_allocated_type_units = 0; |
| 441 | |
| 442 | /* The .debug_types-related CUs (TUs). |
| 443 | This is stored in malloc space because we may realloc it. */ |
| 444 | struct signatured_type **all_type_units = NULL; |
| 445 | |
| 446 | /* Table of struct type_unit_group objects. |
| 447 | The hash key is the DW_AT_stmt_list value. */ |
| 448 | htab_t type_unit_groups {}; |
| 449 | |
| 450 | /* A table mapping .debug_types signatures to its signatured_type entry. |
| 451 | This is NULL if the .debug_types section hasn't been read in yet. */ |
| 452 | htab_t signatured_types {}; |
| 453 | |
| 454 | /* Type unit statistics, to see how well the scaling improvements |
| 455 | are doing. */ |
| 456 | struct tu_stats tu_stats {}; |
| 457 | |
| 458 | /* A chain of compilation units that are currently read in, so that |
| 459 | they can be freed later. */ |
| 460 | dwarf2_per_cu_data *read_in_chain = NULL; |
| 461 | |
| 462 | /* A table mapping DW_AT_dwo_name values to struct dwo_file objects. |
| 463 | This is NULL if the table hasn't been allocated yet. */ |
| 464 | htab_t dwo_files {}; |
| 465 | |
| 466 | /* True if we've checked for whether there is a DWP file. */ |
| 467 | bool dwp_checked = false; |
| 468 | |
| 469 | /* The DWP file if there is one, or NULL. */ |
| 470 | struct dwp_file *dwp_file = NULL; |
| 471 | |
| 472 | /* The shared '.dwz' file, if one exists. This is used when the |
| 473 | original data was compressed using 'dwz -m'. */ |
| 474 | struct dwz_file *dwz_file = NULL; |
| 475 | |
| 476 | /* A flag indicating whether this objfile has a section loaded at a |
| 477 | VMA of 0. */ |
| 478 | bool has_section_at_zero = false; |
| 479 | |
| 480 | /* True if we are using the mapped index, |
| 481 | or we are faking it for OBJF_READNOW's sake. */ |
| 482 | bool using_index = false; |
| 483 | |
| 484 | /* The mapped index, or NULL if .gdb_index is missing or not being used. */ |
| 485 | mapped_index *index_table = NULL; |
| 486 | |
| 487 | /* The mapped index, or NULL if .debug_names is missing or not being used. */ |
| 488 | std::unique_ptr<mapped_debug_names> debug_names_table; |
| 489 | |
| 490 | /* When using index_table, this keeps track of all quick_file_names entries. |
| 491 | TUs typically share line table entries with a CU, so we maintain a |
| 492 | separate table of all line table entries to support the sharing. |
| 493 | Note that while there can be way more TUs than CUs, we've already |
| 494 | sorted all the TUs into "type unit groups", grouped by their |
| 495 | DW_AT_stmt_list value. Therefore the only sharing done here is with a |
| 496 | CU and its associated TU group if there is one. */ |
| 497 | htab_t quick_file_names_table {}; |
| 498 | |
| 499 | /* Set during partial symbol reading, to prevent queueing of full |
| 500 | symbols. */ |
| 501 | bool reading_partial_symbols = false; |
| 502 | |
| 503 | /* Table mapping type DIEs to their struct type *. |
| 504 | This is NULL if not allocated yet. |
| 505 | The mapping is done via (CU/TU + DIE offset) -> type. */ |
| 506 | htab_t die_type_hash {}; |
| 507 | |
| 508 | /* The CUs we recently read. */ |
| 509 | VEC (dwarf2_per_cu_ptr) *just_read_cus = NULL; |
| 510 | |
| 511 | /* Table containing line_header indexed by offset and offset_in_dwz. */ |
| 512 | htab_t line_header_hash {}; |
| 513 | |
| 514 | /* Table containing all filenames. This is an optional because the |
| 515 | table is lazily constructed on first access. */ |
| 516 | gdb::optional<filename_seen_cache> filenames_cache; |
| 517 | }; |
| 518 | |
| 519 | /* Get the dwarf2_per_objfile associated to OBJFILE. */ |
| 520 | |
| 521 | struct dwarf2_per_objfile * |
| 522 | get_dwarf2_per_objfile (struct objfile *objfile) |
| 523 | { |
| 524 | return ((struct dwarf2_per_objfile *) |
| 525 | objfile_data (objfile, dwarf2_objfile_data_key)); |
| 526 | } |
| 527 | |
| 528 | /* Set the dwarf2_per_objfile associated to OBJFILE. */ |
| 529 | |
| 530 | void |
| 531 | set_dwarf2_per_objfile (struct objfile *objfile, |
| 532 | struct dwarf2_per_objfile *dwarf2_per_objfile) |
| 533 | { |
| 534 | gdb_assert (get_dwarf2_per_objfile (objfile) == NULL); |
| 535 | set_objfile_data (objfile, dwarf2_objfile_data_key, dwarf2_per_objfile); |
| 536 | } |
| 537 | |
| 538 | /* Default names of the debugging sections. */ |
| 539 | |
| 540 | /* Note that if the debugging section has been compressed, it might |
| 541 | have a name like .zdebug_info. */ |
| 542 | |
| 543 | static const struct dwarf2_debug_sections dwarf2_elf_names = |
| 544 | { |
| 545 | { ".debug_info", ".zdebug_info" }, |
| 546 | { ".debug_abbrev", ".zdebug_abbrev" }, |
| 547 | { ".debug_line", ".zdebug_line" }, |
| 548 | { ".debug_loc", ".zdebug_loc" }, |
| 549 | { ".debug_loclists", ".zdebug_loclists" }, |
| 550 | { ".debug_macinfo", ".zdebug_macinfo" }, |
| 551 | { ".debug_macro", ".zdebug_macro" }, |
| 552 | { ".debug_str", ".zdebug_str" }, |
| 553 | { ".debug_line_str", ".zdebug_line_str" }, |
| 554 | { ".debug_ranges", ".zdebug_ranges" }, |
| 555 | { ".debug_rnglists", ".zdebug_rnglists" }, |
| 556 | { ".debug_types", ".zdebug_types" }, |
| 557 | { ".debug_addr", ".zdebug_addr" }, |
| 558 | { ".debug_frame", ".zdebug_frame" }, |
| 559 | { ".eh_frame", NULL }, |
| 560 | { ".gdb_index", ".zgdb_index" }, |
| 561 | { ".debug_names", ".zdebug_names" }, |
| 562 | { ".debug_aranges", ".zdebug_aranges" }, |
| 563 | 23 |
| 564 | }; |
| 565 | |
| 566 | /* List of DWO/DWP sections. */ |
| 567 | |
| 568 | static const struct dwop_section_names |
| 569 | { |
| 570 | struct dwarf2_section_names abbrev_dwo; |
| 571 | struct dwarf2_section_names info_dwo; |
| 572 | struct dwarf2_section_names line_dwo; |
| 573 | struct dwarf2_section_names loc_dwo; |
| 574 | struct dwarf2_section_names loclists_dwo; |
| 575 | struct dwarf2_section_names macinfo_dwo; |
| 576 | struct dwarf2_section_names macro_dwo; |
| 577 | struct dwarf2_section_names str_dwo; |
| 578 | struct dwarf2_section_names str_offsets_dwo; |
| 579 | struct dwarf2_section_names types_dwo; |
| 580 | struct dwarf2_section_names cu_index; |
| 581 | struct dwarf2_section_names tu_index; |
| 582 | } |
| 583 | dwop_section_names = |
| 584 | { |
| 585 | { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" }, |
| 586 | { ".debug_info.dwo", ".zdebug_info.dwo" }, |
| 587 | { ".debug_line.dwo", ".zdebug_line.dwo" }, |
| 588 | { ".debug_loc.dwo", ".zdebug_loc.dwo" }, |
| 589 | { ".debug_loclists.dwo", ".zdebug_loclists.dwo" }, |
| 590 | { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" }, |
| 591 | { ".debug_macro.dwo", ".zdebug_macro.dwo" }, |
| 592 | { ".debug_str.dwo", ".zdebug_str.dwo" }, |
| 593 | { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" }, |
| 594 | { ".debug_types.dwo", ".zdebug_types.dwo" }, |
| 595 | { ".debug_cu_index", ".zdebug_cu_index" }, |
| 596 | { ".debug_tu_index", ".zdebug_tu_index" }, |
| 597 | }; |
| 598 | |
| 599 | /* local data types */ |
| 600 | |
| 601 | /* The data in a compilation unit header, after target2host |
| 602 | translation, looks like this. */ |
| 603 | struct comp_unit_head |
| 604 | { |
| 605 | unsigned int length; |
| 606 | short version; |
| 607 | unsigned char addr_size; |
| 608 | unsigned char signed_addr_p; |
| 609 | sect_offset abbrev_sect_off; |
| 610 | |
| 611 | /* Size of file offsets; either 4 or 8. */ |
| 612 | unsigned int offset_size; |
| 613 | |
| 614 | /* Size of the length field; either 4 or 12. */ |
| 615 | unsigned int initial_length_size; |
| 616 | |
| 617 | enum dwarf_unit_type unit_type; |
| 618 | |
| 619 | /* Offset to the first byte of this compilation unit header in the |
| 620 | .debug_info section, for resolving relative reference dies. */ |
| 621 | sect_offset sect_off; |
| 622 | |
| 623 | /* Offset to first die in this cu from the start of the cu. |
| 624 | This will be the first byte following the compilation unit header. */ |
| 625 | cu_offset first_die_cu_offset; |
| 626 | |
| 627 | /* 64-bit signature of this type unit - it is valid only for |
| 628 | UNIT_TYPE DW_UT_type. */ |
| 629 | ULONGEST signature; |
| 630 | |
| 631 | /* For types, offset in the type's DIE of the type defined by this TU. */ |
| 632 | cu_offset type_cu_offset_in_tu; |
| 633 | }; |
| 634 | |
| 635 | /* Type used for delaying computation of method physnames. |
| 636 | See comments for compute_delayed_physnames. */ |
| 637 | struct delayed_method_info |
| 638 | { |
| 639 | /* The type to which the method is attached, i.e., its parent class. */ |
| 640 | struct type *type; |
| 641 | |
| 642 | /* The index of the method in the type's function fieldlists. */ |
| 643 | int fnfield_index; |
| 644 | |
| 645 | /* The index of the method in the fieldlist. */ |
| 646 | int index; |
| 647 | |
| 648 | /* The name of the DIE. */ |
| 649 | const char *name; |
| 650 | |
| 651 | /* The DIE associated with this method. */ |
| 652 | struct die_info *die; |
| 653 | }; |
| 654 | |
| 655 | /* Internal state when decoding a particular compilation unit. */ |
| 656 | struct dwarf2_cu |
| 657 | { |
| 658 | explicit dwarf2_cu (struct dwarf2_per_cu_data *per_cu); |
| 659 | ~dwarf2_cu (); |
| 660 | |
| 661 | DISABLE_COPY_AND_ASSIGN (dwarf2_cu); |
| 662 | |
| 663 | /* The header of the compilation unit. */ |
| 664 | struct comp_unit_head header {}; |
| 665 | |
| 666 | /* Base address of this compilation unit. */ |
| 667 | CORE_ADDR base_address = 0; |
| 668 | |
| 669 | /* Non-zero if base_address has been set. */ |
| 670 | int base_known = 0; |
| 671 | |
| 672 | /* The language we are debugging. */ |
| 673 | enum language language = language_unknown; |
| 674 | const struct language_defn *language_defn = nullptr; |
| 675 | |
| 676 | const char *producer = nullptr; |
| 677 | |
| 678 | /* The generic symbol table building routines have separate lists for |
| 679 | file scope symbols and all all other scopes (local scopes). So |
| 680 | we need to select the right one to pass to add_symbol_to_list(). |
| 681 | We do it by keeping a pointer to the correct list in list_in_scope. |
| 682 | |
| 683 | FIXME: The original dwarf code just treated the file scope as the |
| 684 | first local scope, and all other local scopes as nested local |
| 685 | scopes, and worked fine. Check to see if we really need to |
| 686 | distinguish these in buildsym.c. */ |
| 687 | struct pending **list_in_scope = nullptr; |
| 688 | |
| 689 | /* Hash table holding all the loaded partial DIEs |
| 690 | with partial_die->offset.SECT_OFF as hash. */ |
| 691 | htab_t partial_dies = nullptr; |
| 692 | |
| 693 | /* Storage for things with the same lifetime as this read-in compilation |
| 694 | unit, including partial DIEs. */ |
| 695 | auto_obstack comp_unit_obstack; |
| 696 | |
| 697 | /* When multiple dwarf2_cu structures are living in memory, this field |
| 698 | chains them all together, so that they can be released efficiently. |
| 699 | We will probably also want a generation counter so that most-recently-used |
| 700 | compilation units are cached... */ |
| 701 | struct dwarf2_per_cu_data *read_in_chain = nullptr; |
| 702 | |
| 703 | /* Backlink to our per_cu entry. */ |
| 704 | struct dwarf2_per_cu_data *per_cu; |
| 705 | |
| 706 | /* How many compilation units ago was this CU last referenced? */ |
| 707 | int last_used = 0; |
| 708 | |
| 709 | /* A hash table of DIE cu_offset for following references with |
| 710 | die_info->offset.sect_off as hash. */ |
| 711 | htab_t die_hash = nullptr; |
| 712 | |
| 713 | /* Full DIEs if read in. */ |
| 714 | struct die_info *dies = nullptr; |
| 715 | |
| 716 | /* A set of pointers to dwarf2_per_cu_data objects for compilation |
| 717 | units referenced by this one. Only set during full symbol processing; |
| 718 | partial symbol tables do not have dependencies. */ |
| 719 | htab_t dependencies = nullptr; |
| 720 | |
| 721 | /* Header data from the line table, during full symbol processing. */ |
| 722 | struct line_header *line_header = nullptr; |
| 723 | /* Non-NULL if LINE_HEADER is owned by this DWARF_CU. Otherwise, |
| 724 | it's owned by dwarf2_per_objfile::line_header_hash. If non-NULL, |
| 725 | this is the DW_TAG_compile_unit die for this CU. We'll hold on |
| 726 | to the line header as long as this DIE is being processed. See |
| 727 | process_die_scope. */ |
| 728 | die_info *line_header_die_owner = nullptr; |
| 729 | |
| 730 | /* A list of methods which need to have physnames computed |
| 731 | after all type information has been read. */ |
| 732 | std::vector<delayed_method_info> method_list; |
| 733 | |
| 734 | /* To be copied to symtab->call_site_htab. */ |
| 735 | htab_t call_site_htab = nullptr; |
| 736 | |
| 737 | /* Non-NULL if this CU came from a DWO file. |
| 738 | There is an invariant here that is important to remember: |
| 739 | Except for attributes copied from the top level DIE in the "main" |
| 740 | (or "stub") file in preparation for reading the DWO file |
| 741 | (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU. |
| 742 | Either there isn't a DWO file (in which case this is NULL and the point |
| 743 | is moot), or there is and either we're not going to read it (in which |
| 744 | case this is NULL) or there is and we are reading it (in which case this |
| 745 | is non-NULL). */ |
| 746 | struct dwo_unit *dwo_unit = nullptr; |
| 747 | |
| 748 | /* The DW_AT_addr_base attribute if present, zero otherwise |
| 749 | (zero is a valid value though). |
| 750 | Note this value comes from the Fission stub CU/TU's DIE. */ |
| 751 | ULONGEST addr_base = 0; |
| 752 | |
| 753 | /* The DW_AT_ranges_base attribute if present, zero otherwise |
| 754 | (zero is a valid value though). |
| 755 | Note this value comes from the Fission stub CU/TU's DIE. |
| 756 | Also note that the value is zero in the non-DWO case so this value can |
| 757 | be used without needing to know whether DWO files are in use or not. |
| 758 | N.B. This does not apply to DW_AT_ranges appearing in |
| 759 | DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever |
| 760 | DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then |
| 761 | DW_AT_ranges_base *would* have to be applied, and we'd have to care |
| 762 | whether the DW_AT_ranges attribute came from the skeleton or DWO. */ |
| 763 | ULONGEST ranges_base = 0; |
| 764 | |
| 765 | /* Mark used when releasing cached dies. */ |
| 766 | unsigned int mark : 1; |
| 767 | |
| 768 | /* This CU references .debug_loc. See the symtab->locations_valid field. |
| 769 | This test is imperfect as there may exist optimized debug code not using |
| 770 | any location list and still facing inlining issues if handled as |
| 771 | unoptimized code. For a future better test see GCC PR other/32998. */ |
| 772 | unsigned int has_loclist : 1; |
| 773 | |
| 774 | /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set |
| 775 | if all the producer_is_* fields are valid. This information is cached |
| 776 | because profiling CU expansion showed excessive time spent in |
| 777 | producer_is_gxx_lt_4_6. */ |
| 778 | unsigned int checked_producer : 1; |
| 779 | unsigned int producer_is_gxx_lt_4_6 : 1; |
| 780 | unsigned int producer_is_gcc_lt_4_3 : 1; |
| 781 | unsigned int producer_is_icc_lt_14 : 1; |
| 782 | |
| 783 | /* When set, the file that we're processing is known to have |
| 784 | debugging info for C++ namespaces. GCC 3.3.x did not produce |
| 785 | this information, but later versions do. */ |
| 786 | |
| 787 | unsigned int processing_has_namespace_info : 1; |
| 788 | }; |
| 789 | |
| 790 | /* Persistent data held for a compilation unit, even when not |
| 791 | processing it. We put a pointer to this structure in the |
| 792 | read_symtab_private field of the psymtab. */ |
| 793 | |
| 794 | struct dwarf2_per_cu_data |
| 795 | { |
| 796 | /* The start offset and length of this compilation unit. |
| 797 | NOTE: Unlike comp_unit_head.length, this length includes |
| 798 | initial_length_size. |
| 799 | If the DIE refers to a DWO file, this is always of the original die, |
| 800 | not the DWO file. */ |
| 801 | sect_offset sect_off; |
| 802 | unsigned int length; |
| 803 | |
| 804 | /* DWARF standard version this data has been read from (such as 4 or 5). */ |
| 805 | short dwarf_version; |
| 806 | |
| 807 | /* Flag indicating this compilation unit will be read in before |
| 808 | any of the current compilation units are processed. */ |
| 809 | unsigned int queued : 1; |
| 810 | |
| 811 | /* This flag will be set when reading partial DIEs if we need to load |
| 812 | absolutely all DIEs for this compilation unit, instead of just the ones |
| 813 | we think are interesting. It gets set if we look for a DIE in the |
| 814 | hash table and don't find it. */ |
| 815 | unsigned int load_all_dies : 1; |
| 816 | |
| 817 | /* Non-zero if this CU is from .debug_types. |
| 818 | Struct dwarf2_per_cu_data is contained in struct signatured_type iff |
| 819 | this is non-zero. */ |
| 820 | unsigned int is_debug_types : 1; |
| 821 | |
| 822 | /* Non-zero if this CU is from the .dwz file. */ |
| 823 | unsigned int is_dwz : 1; |
| 824 | |
| 825 | /* Non-zero if reading a TU directly from a DWO file, bypassing the stub. |
| 826 | This flag is only valid if is_debug_types is true. |
| 827 | We can't read a CU directly from a DWO file: There are required |
| 828 | attributes in the stub. */ |
| 829 | unsigned int reading_dwo_directly : 1; |
| 830 | |
| 831 | /* Non-zero if the TU has been read. |
| 832 | This is used to assist the "Stay in DWO Optimization" for Fission: |
| 833 | When reading a DWO, it's faster to read TUs from the DWO instead of |
| 834 | fetching them from random other DWOs (due to comdat folding). |
| 835 | If the TU has already been read, the optimization is unnecessary |
| 836 | (and unwise - we don't want to change where gdb thinks the TU lives |
| 837 | "midflight"). |
| 838 | This flag is only valid if is_debug_types is true. */ |
| 839 | unsigned int tu_read : 1; |
| 840 | |
| 841 | /* The section this CU/TU lives in. |
| 842 | If the DIE refers to a DWO file, this is always the original die, |
| 843 | not the DWO file. */ |
| 844 | struct dwarf2_section_info *section; |
| 845 | |
| 846 | /* Set to non-NULL iff this CU is currently loaded. When it gets freed out |
| 847 | of the CU cache it gets reset to NULL again. This is left as NULL for |
| 848 | dummy CUs (a CU header, but nothing else). */ |
| 849 | struct dwarf2_cu *cu; |
| 850 | |
| 851 | /* The corresponding dwarf2_per_objfile. */ |
| 852 | struct dwarf2_per_objfile *dwarf2_per_objfile; |
| 853 | |
| 854 | /* When dwarf2_per_objfile->using_index is true, the 'quick' field |
| 855 | is active. Otherwise, the 'psymtab' field is active. */ |
| 856 | union |
| 857 | { |
| 858 | /* The partial symbol table associated with this compilation unit, |
| 859 | or NULL for unread partial units. */ |
| 860 | struct partial_symtab *psymtab; |
| 861 | |
| 862 | /* Data needed by the "quick" functions. */ |
| 863 | struct dwarf2_per_cu_quick_data *quick; |
| 864 | } v; |
| 865 | |
| 866 | /* The CUs we import using DW_TAG_imported_unit. This is filled in |
| 867 | while reading psymtabs, used to compute the psymtab dependencies, |
| 868 | and then cleared. Then it is filled in again while reading full |
| 869 | symbols, and only deleted when the objfile is destroyed. |
| 870 | |
| 871 | This is also used to work around a difference between the way gold |
| 872 | generates .gdb_index version <=7 and the way gdb does. Arguably this |
| 873 | is a gold bug. For symbols coming from TUs, gold records in the index |
| 874 | the CU that includes the TU instead of the TU itself. This breaks |
| 875 | dw2_lookup_symbol: It assumes that if the index says symbol X lives |
| 876 | in CU/TU Y, then one need only expand Y and a subsequent lookup in Y |
| 877 | will find X. Alas TUs live in their own symtab, so after expanding CU Y |
| 878 | we need to look in TU Z to find X. Fortunately, this is akin to |
| 879 | DW_TAG_imported_unit, so we just use the same mechanism: For |
| 880 | .gdb_index version <=7 this also records the TUs that the CU referred |
| 881 | to. Concurrently with this change gdb was modified to emit version 8 |
| 882 | indices so we only pay a price for gold generated indices. |
| 883 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */ |
| 884 | VEC (dwarf2_per_cu_ptr) *imported_symtabs; |
| 885 | }; |
| 886 | |
| 887 | /* Entry in the signatured_types hash table. */ |
| 888 | |
| 889 | struct signatured_type |
| 890 | { |
| 891 | /* The "per_cu" object of this type. |
| 892 | This struct is used iff per_cu.is_debug_types. |
| 893 | N.B.: This is the first member so that it's easy to convert pointers |
| 894 | between them. */ |
| 895 | struct dwarf2_per_cu_data per_cu; |
| 896 | |
| 897 | /* The type's signature. */ |
| 898 | ULONGEST signature; |
| 899 | |
| 900 | /* Offset in the TU of the type's DIE, as read from the TU header. |
| 901 | If this TU is a DWO stub and the definition lives in a DWO file |
| 902 | (specified by DW_AT_GNU_dwo_name), this value is unusable. */ |
| 903 | cu_offset type_offset_in_tu; |
| 904 | |
| 905 | /* Offset in the section of the type's DIE. |
| 906 | If the definition lives in a DWO file, this is the offset in the |
| 907 | .debug_types.dwo section. |
| 908 | The value is zero until the actual value is known. |
| 909 | Zero is otherwise not a valid section offset. */ |
| 910 | sect_offset type_offset_in_section; |
| 911 | |
| 912 | /* Type units are grouped by their DW_AT_stmt_list entry so that they |
| 913 | can share them. This points to the containing symtab. */ |
| 914 | struct type_unit_group *type_unit_group; |
| 915 | |
| 916 | /* The type. |
| 917 | The first time we encounter this type we fully read it in and install it |
| 918 | in the symbol tables. Subsequent times we only need the type. */ |
| 919 | struct type *type; |
| 920 | |
| 921 | /* Containing DWO unit. |
| 922 | This field is valid iff per_cu.reading_dwo_directly. */ |
| 923 | struct dwo_unit *dwo_unit; |
| 924 | }; |
| 925 | |
| 926 | typedef struct signatured_type *sig_type_ptr; |
| 927 | DEF_VEC_P (sig_type_ptr); |
| 928 | |
| 929 | /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list. |
| 930 | This includes type_unit_group and quick_file_names. */ |
| 931 | |
| 932 | struct stmt_list_hash |
| 933 | { |
| 934 | /* The DWO unit this table is from or NULL if there is none. */ |
| 935 | struct dwo_unit *dwo_unit; |
| 936 | |
| 937 | /* Offset in .debug_line or .debug_line.dwo. */ |
| 938 | sect_offset line_sect_off; |
| 939 | }; |
| 940 | |
| 941 | /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to |
| 942 | an object of this type. */ |
| 943 | |
| 944 | struct type_unit_group |
| 945 | { |
| 946 | /* dwarf2read.c's main "handle" on a TU symtab. |
| 947 | To simplify things we create an artificial CU that "includes" all the |
| 948 | type units using this stmt_list so that the rest of the code still has |
| 949 | a "per_cu" handle on the symtab. |
| 950 | This PER_CU is recognized by having no section. */ |
| 951 | #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL) |
| 952 | struct dwarf2_per_cu_data per_cu; |
| 953 | |
| 954 | /* The TUs that share this DW_AT_stmt_list entry. |
| 955 | This is added to while parsing type units to build partial symtabs, |
| 956 | and is deleted afterwards and not used again. */ |
| 957 | VEC (sig_type_ptr) *tus; |
| 958 | |
| 959 | /* The compunit symtab. |
| 960 | Type units in a group needn't all be defined in the same source file, |
| 961 | so we create an essentially anonymous symtab as the compunit symtab. */ |
| 962 | struct compunit_symtab *compunit_symtab; |
| 963 | |
| 964 | /* The data used to construct the hash key. */ |
| 965 | struct stmt_list_hash hash; |
| 966 | |
| 967 | /* The number of symtabs from the line header. |
| 968 | The value here must match line_header.num_file_names. */ |
| 969 | unsigned int num_symtabs; |
| 970 | |
| 971 | /* The symbol tables for this TU (obtained from the files listed in |
| 972 | DW_AT_stmt_list). |
| 973 | WARNING: The order of entries here must match the order of entries |
| 974 | in the line header. After the first TU using this type_unit_group, the |
| 975 | line header for the subsequent TUs is recreated from this. This is done |
| 976 | because we need to use the same symtabs for each TU using the same |
| 977 | DW_AT_stmt_list value. Also note that symtabs may be repeated here, |
| 978 | there's no guarantee the line header doesn't have duplicate entries. */ |
| 979 | struct symtab **symtabs; |
| 980 | }; |
| 981 | |
| 982 | /* These sections are what may appear in a (real or virtual) DWO file. */ |
| 983 | |
| 984 | struct dwo_sections |
| 985 | { |
| 986 | struct dwarf2_section_info abbrev; |
| 987 | struct dwarf2_section_info line; |
| 988 | struct dwarf2_section_info loc; |
| 989 | struct dwarf2_section_info loclists; |
| 990 | struct dwarf2_section_info macinfo; |
| 991 | struct dwarf2_section_info macro; |
| 992 | struct dwarf2_section_info str; |
| 993 | struct dwarf2_section_info str_offsets; |
| 994 | /* In the case of a virtual DWO file, these two are unused. */ |
| 995 | struct dwarf2_section_info info; |
| 996 | VEC (dwarf2_section_info_def) *types; |
| 997 | }; |
| 998 | |
| 999 | /* CUs/TUs in DWP/DWO files. */ |
| 1000 | |
| 1001 | struct dwo_unit |
| 1002 | { |
| 1003 | /* Backlink to the containing struct dwo_file. */ |
| 1004 | struct dwo_file *dwo_file; |
| 1005 | |
| 1006 | /* The "id" that distinguishes this CU/TU. |
| 1007 | .debug_info calls this "dwo_id", .debug_types calls this "signature". |
| 1008 | Since signatures came first, we stick with it for consistency. */ |
| 1009 | ULONGEST signature; |
| 1010 | |
| 1011 | /* The section this CU/TU lives in, in the DWO file. */ |
| 1012 | struct dwarf2_section_info *section; |
| 1013 | |
| 1014 | /* Same as dwarf2_per_cu_data:{sect_off,length} but in the DWO section. */ |
| 1015 | sect_offset sect_off; |
| 1016 | unsigned int length; |
| 1017 | |
| 1018 | /* For types, offset in the type's DIE of the type defined by this TU. */ |
| 1019 | cu_offset type_offset_in_tu; |
| 1020 | }; |
| 1021 | |
| 1022 | /* include/dwarf2.h defines the DWP section codes. |
| 1023 | It defines a max value but it doesn't define a min value, which we |
| 1024 | use for error checking, so provide one. */ |
| 1025 | |
| 1026 | enum dwp_v2_section_ids |
| 1027 | { |
| 1028 | DW_SECT_MIN = 1 |
| 1029 | }; |
| 1030 | |
| 1031 | /* Data for one DWO file. |
| 1032 | |
| 1033 | This includes virtual DWO files (a virtual DWO file is a DWO file as it |
| 1034 | appears in a DWP file). DWP files don't really have DWO files per se - |
| 1035 | comdat folding of types "loses" the DWO file they came from, and from |
| 1036 | a high level view DWP files appear to contain a mass of random types. |
| 1037 | However, to maintain consistency with the non-DWP case we pretend DWP |
| 1038 | files contain virtual DWO files, and we assign each TU with one virtual |
| 1039 | DWO file (generally based on the line and abbrev section offsets - |
| 1040 | a heuristic that seems to work in practice). */ |
| 1041 | |
| 1042 | struct dwo_file |
| 1043 | { |
| 1044 | /* The DW_AT_GNU_dwo_name attribute. |
| 1045 | For virtual DWO files the name is constructed from the section offsets |
| 1046 | of abbrev,line,loc,str_offsets so that we combine virtual DWO files |
| 1047 | from related CU+TUs. */ |
| 1048 | const char *dwo_name; |
| 1049 | |
| 1050 | /* The DW_AT_comp_dir attribute. */ |
| 1051 | const char *comp_dir; |
| 1052 | |
| 1053 | /* The bfd, when the file is open. Otherwise this is NULL. |
| 1054 | This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */ |
| 1055 | bfd *dbfd; |
| 1056 | |
| 1057 | /* The sections that make up this DWO file. |
| 1058 | Remember that for virtual DWO files in DWP V2, these are virtual |
| 1059 | sections (for lack of a better name). */ |
| 1060 | struct dwo_sections sections; |
| 1061 | |
| 1062 | /* The CUs in the file. |
| 1063 | Each element is a struct dwo_unit. Multiple CUs per DWO are supported as |
| 1064 | an extension to handle LLVM's Link Time Optimization output (where |
| 1065 | multiple source files may be compiled into a single object/dwo pair). */ |
| 1066 | htab_t cus; |
| 1067 | |
| 1068 | /* Table of TUs in the file. |
| 1069 | Each element is a struct dwo_unit. */ |
| 1070 | htab_t tus; |
| 1071 | }; |
| 1072 | |
| 1073 | /* These sections are what may appear in a DWP file. */ |
| 1074 | |
| 1075 | struct dwp_sections |
| 1076 | { |
| 1077 | /* These are used by both DWP version 1 and 2. */ |
| 1078 | struct dwarf2_section_info str; |
| 1079 | struct dwarf2_section_info cu_index; |
| 1080 | struct dwarf2_section_info tu_index; |
| 1081 | |
| 1082 | /* These are only used by DWP version 2 files. |
| 1083 | In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other |
| 1084 | sections are referenced by section number, and are not recorded here. |
| 1085 | In DWP version 2 there is at most one copy of all these sections, each |
| 1086 | section being (effectively) comprised of the concatenation of all of the |
| 1087 | individual sections that exist in the version 1 format. |
| 1088 | To keep the code simple we treat each of these concatenated pieces as a |
| 1089 | section itself (a virtual section?). */ |
| 1090 | struct dwarf2_section_info abbrev; |
| 1091 | struct dwarf2_section_info info; |
| 1092 | struct dwarf2_section_info line; |
| 1093 | struct dwarf2_section_info loc; |
| 1094 | struct dwarf2_section_info macinfo; |
| 1095 | struct dwarf2_section_info macro; |
| 1096 | struct dwarf2_section_info str_offsets; |
| 1097 | struct dwarf2_section_info types; |
| 1098 | }; |
| 1099 | |
| 1100 | /* These sections are what may appear in a virtual DWO file in DWP version 1. |
| 1101 | A virtual DWO file is a DWO file as it appears in a DWP file. */ |
| 1102 | |
| 1103 | struct virtual_v1_dwo_sections |
| 1104 | { |
| 1105 | struct dwarf2_section_info abbrev; |
| 1106 | struct dwarf2_section_info line; |
| 1107 | struct dwarf2_section_info loc; |
| 1108 | struct dwarf2_section_info macinfo; |
| 1109 | struct dwarf2_section_info macro; |
| 1110 | struct dwarf2_section_info str_offsets; |
| 1111 | /* Each DWP hash table entry records one CU or one TU. |
| 1112 | That is recorded here, and copied to dwo_unit.section. */ |
| 1113 | struct dwarf2_section_info info_or_types; |
| 1114 | }; |
| 1115 | |
| 1116 | /* Similar to virtual_v1_dwo_sections, but for DWP version 2. |
| 1117 | In version 2, the sections of the DWO files are concatenated together |
| 1118 | and stored in one section of that name. Thus each ELF section contains |
| 1119 | several "virtual" sections. */ |
| 1120 | |
| 1121 | struct virtual_v2_dwo_sections |
| 1122 | { |
| 1123 | bfd_size_type abbrev_offset; |
| 1124 | bfd_size_type abbrev_size; |
| 1125 | |
| 1126 | bfd_size_type line_offset; |
| 1127 | bfd_size_type line_size; |
| 1128 | |
| 1129 | bfd_size_type loc_offset; |
| 1130 | bfd_size_type loc_size; |
| 1131 | |
| 1132 | bfd_size_type macinfo_offset; |
| 1133 | bfd_size_type macinfo_size; |
| 1134 | |
| 1135 | bfd_size_type macro_offset; |
| 1136 | bfd_size_type macro_size; |
| 1137 | |
| 1138 | bfd_size_type str_offsets_offset; |
| 1139 | bfd_size_type str_offsets_size; |
| 1140 | |
| 1141 | /* Each DWP hash table entry records one CU or one TU. |
| 1142 | That is recorded here, and copied to dwo_unit.section. */ |
| 1143 | bfd_size_type info_or_types_offset; |
| 1144 | bfd_size_type info_or_types_size; |
| 1145 | }; |
| 1146 | |
| 1147 | /* Contents of DWP hash tables. */ |
| 1148 | |
| 1149 | struct dwp_hash_table |
| 1150 | { |
| 1151 | uint32_t version, nr_columns; |
| 1152 | uint32_t nr_units, nr_slots; |
| 1153 | const gdb_byte *hash_table, *unit_table; |
| 1154 | union |
| 1155 | { |
| 1156 | struct |
| 1157 | { |
| 1158 | const gdb_byte *indices; |
| 1159 | } v1; |
| 1160 | struct |
| 1161 | { |
| 1162 | /* This is indexed by column number and gives the id of the section |
| 1163 | in that column. */ |
| 1164 | #define MAX_NR_V2_DWO_SECTIONS \ |
| 1165 | (1 /* .debug_info or .debug_types */ \ |
| 1166 | + 1 /* .debug_abbrev */ \ |
| 1167 | + 1 /* .debug_line */ \ |
| 1168 | + 1 /* .debug_loc */ \ |
| 1169 | + 1 /* .debug_str_offsets */ \ |
| 1170 | + 1 /* .debug_macro or .debug_macinfo */) |
| 1171 | int section_ids[MAX_NR_V2_DWO_SECTIONS]; |
| 1172 | const gdb_byte *offsets; |
| 1173 | const gdb_byte *sizes; |
| 1174 | } v2; |
| 1175 | } section_pool; |
| 1176 | }; |
| 1177 | |
| 1178 | /* Data for one DWP file. */ |
| 1179 | |
| 1180 | struct dwp_file |
| 1181 | { |
| 1182 | /* Name of the file. */ |
| 1183 | const char *name; |
| 1184 | |
| 1185 | /* File format version. */ |
| 1186 | int version; |
| 1187 | |
| 1188 | /* The bfd. */ |
| 1189 | bfd *dbfd; |
| 1190 | |
| 1191 | /* Section info for this file. */ |
| 1192 | struct dwp_sections sections; |
| 1193 | |
| 1194 | /* Table of CUs in the file. */ |
| 1195 | const struct dwp_hash_table *cus; |
| 1196 | |
| 1197 | /* Table of TUs in the file. */ |
| 1198 | const struct dwp_hash_table *tus; |
| 1199 | |
| 1200 | /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */ |
| 1201 | htab_t loaded_cus; |
| 1202 | htab_t loaded_tus; |
| 1203 | |
| 1204 | /* Table to map ELF section numbers to their sections. |
| 1205 | This is only needed for the DWP V1 file format. */ |
| 1206 | unsigned int num_sections; |
| 1207 | asection **elf_sections; |
| 1208 | }; |
| 1209 | |
| 1210 | /* This represents a '.dwz' file. */ |
| 1211 | |
| 1212 | struct dwz_file |
| 1213 | { |
| 1214 | /* A dwz file can only contain a few sections. */ |
| 1215 | struct dwarf2_section_info abbrev; |
| 1216 | struct dwarf2_section_info info; |
| 1217 | struct dwarf2_section_info str; |
| 1218 | struct dwarf2_section_info line; |
| 1219 | struct dwarf2_section_info macro; |
| 1220 | struct dwarf2_section_info gdb_index; |
| 1221 | struct dwarf2_section_info debug_names; |
| 1222 | |
| 1223 | /* The dwz's BFD. */ |
| 1224 | bfd *dwz_bfd; |
| 1225 | }; |
| 1226 | |
| 1227 | /* Struct used to pass misc. parameters to read_die_and_children, et |
| 1228 | al. which are used for both .debug_info and .debug_types dies. |
| 1229 | All parameters here are unchanging for the life of the call. This |
| 1230 | struct exists to abstract away the constant parameters of die reading. */ |
| 1231 | |
| 1232 | struct die_reader_specs |
| 1233 | { |
| 1234 | /* The bfd of die_section. */ |
| 1235 | bfd* abfd; |
| 1236 | |
| 1237 | /* The CU of the DIE we are parsing. */ |
| 1238 | struct dwarf2_cu *cu; |
| 1239 | |
| 1240 | /* Non-NULL if reading a DWO file (including one packaged into a DWP). */ |
| 1241 | struct dwo_file *dwo_file; |
| 1242 | |
| 1243 | /* The section the die comes from. |
| 1244 | This is either .debug_info or .debug_types, or the .dwo variants. */ |
| 1245 | struct dwarf2_section_info *die_section; |
| 1246 | |
| 1247 | /* die_section->buffer. */ |
| 1248 | const gdb_byte *buffer; |
| 1249 | |
| 1250 | /* The end of the buffer. */ |
| 1251 | const gdb_byte *buffer_end; |
| 1252 | |
| 1253 | /* The value of the DW_AT_comp_dir attribute. */ |
| 1254 | const char *comp_dir; |
| 1255 | |
| 1256 | /* The abbreviation table to use when reading the DIEs. */ |
| 1257 | struct abbrev_table *abbrev_table; |
| 1258 | }; |
| 1259 | |
| 1260 | /* Type of function passed to init_cutu_and_read_dies, et.al. */ |
| 1261 | typedef void (die_reader_func_ftype) (const struct die_reader_specs *reader, |
| 1262 | const gdb_byte *info_ptr, |
| 1263 | struct die_info *comp_unit_die, |
| 1264 | int has_children, |
| 1265 | void *data); |
| 1266 | |
| 1267 | /* A 1-based directory index. This is a strong typedef to prevent |
| 1268 | accidentally using a directory index as a 0-based index into an |
| 1269 | array/vector. */ |
| 1270 | enum class dir_index : unsigned int {}; |
| 1271 | |
| 1272 | /* Likewise, a 1-based file name index. */ |
| 1273 | enum class file_name_index : unsigned int {}; |
| 1274 | |
| 1275 | struct file_entry |
| 1276 | { |
| 1277 | file_entry () = default; |
| 1278 | |
| 1279 | file_entry (const char *name_, dir_index d_index_, |
| 1280 | unsigned int mod_time_, unsigned int length_) |
| 1281 | : name (name_), |
| 1282 | d_index (d_index_), |
| 1283 | mod_time (mod_time_), |
| 1284 | length (length_) |
| 1285 | {} |
| 1286 | |
| 1287 | /* Return the include directory at D_INDEX stored in LH. Returns |
| 1288 | NULL if D_INDEX is out of bounds. */ |
| 1289 | const char *include_dir (const line_header *lh) const; |
| 1290 | |
| 1291 | /* The file name. Note this is an observing pointer. The memory is |
| 1292 | owned by debug_line_buffer. */ |
| 1293 | const char *name {}; |
| 1294 | |
| 1295 | /* The directory index (1-based). */ |
| 1296 | dir_index d_index {}; |
| 1297 | |
| 1298 | unsigned int mod_time {}; |
| 1299 | |
| 1300 | unsigned int length {}; |
| 1301 | |
| 1302 | /* True if referenced by the Line Number Program. */ |
| 1303 | bool included_p {}; |
| 1304 | |
| 1305 | /* The associated symbol table, if any. */ |
| 1306 | struct symtab *symtab {}; |
| 1307 | }; |
| 1308 | |
| 1309 | /* The line number information for a compilation unit (found in the |
| 1310 | .debug_line section) begins with a "statement program header", |
| 1311 | which contains the following information. */ |
| 1312 | struct line_header |
| 1313 | { |
| 1314 | line_header () |
| 1315 | : offset_in_dwz {} |
| 1316 | {} |
| 1317 | |
| 1318 | /* Add an entry to the include directory table. */ |
| 1319 | void add_include_dir (const char *include_dir); |
| 1320 | |
| 1321 | /* Add an entry to the file name table. */ |
| 1322 | void add_file_name (const char *name, dir_index d_index, |
| 1323 | unsigned int mod_time, unsigned int length); |
| 1324 | |
| 1325 | /* Return the include dir at INDEX (1-based). Returns NULL if INDEX |
| 1326 | is out of bounds. */ |
| 1327 | const char *include_dir_at (dir_index index) const |
| 1328 | { |
| 1329 | /* Convert directory index number (1-based) to vector index |
| 1330 | (0-based). */ |
| 1331 | size_t vec_index = to_underlying (index) - 1; |
| 1332 | |
| 1333 | if (vec_index >= include_dirs.size ()) |
| 1334 | return NULL; |
| 1335 | return include_dirs[vec_index]; |
| 1336 | } |
| 1337 | |
| 1338 | /* Return the file name at INDEX (1-based). Returns NULL if INDEX |
| 1339 | is out of bounds. */ |
| 1340 | file_entry *file_name_at (file_name_index index) |
| 1341 | { |
| 1342 | /* Convert file name index number (1-based) to vector index |
| 1343 | (0-based). */ |
| 1344 | size_t vec_index = to_underlying (index) - 1; |
| 1345 | |
| 1346 | if (vec_index >= file_names.size ()) |
| 1347 | return NULL; |
| 1348 | return &file_names[vec_index]; |
| 1349 | } |
| 1350 | |
| 1351 | /* Const version of the above. */ |
| 1352 | const file_entry *file_name_at (unsigned int index) const |
| 1353 | { |
| 1354 | if (index >= file_names.size ()) |
| 1355 | return NULL; |
| 1356 | return &file_names[index]; |
| 1357 | } |
| 1358 | |
| 1359 | /* Offset of line number information in .debug_line section. */ |
| 1360 | sect_offset sect_off {}; |
| 1361 | |
| 1362 | /* OFFSET is for struct dwz_file associated with dwarf2_per_objfile. */ |
| 1363 | unsigned offset_in_dwz : 1; /* Can't initialize bitfields in-class. */ |
| 1364 | |
| 1365 | unsigned int total_length {}; |
| 1366 | unsigned short version {}; |
| 1367 | unsigned int header_length {}; |
| 1368 | unsigned char minimum_instruction_length {}; |
| 1369 | unsigned char maximum_ops_per_instruction {}; |
| 1370 | unsigned char default_is_stmt {}; |
| 1371 | int line_base {}; |
| 1372 | unsigned char line_range {}; |
| 1373 | unsigned char opcode_base {}; |
| 1374 | |
| 1375 | /* standard_opcode_lengths[i] is the number of operands for the |
| 1376 | standard opcode whose value is i. This means that |
| 1377 | standard_opcode_lengths[0] is unused, and the last meaningful |
| 1378 | element is standard_opcode_lengths[opcode_base - 1]. */ |
| 1379 | std::unique_ptr<unsigned char[]> standard_opcode_lengths; |
| 1380 | |
| 1381 | /* The include_directories table. Note these are observing |
| 1382 | pointers. The memory is owned by debug_line_buffer. */ |
| 1383 | std::vector<const char *> include_dirs; |
| 1384 | |
| 1385 | /* The file_names table. */ |
| 1386 | std::vector<file_entry> file_names; |
| 1387 | |
| 1388 | /* The start and end of the statement program following this |
| 1389 | header. These point into dwarf2_per_objfile->line_buffer. */ |
| 1390 | const gdb_byte *statement_program_start {}, *statement_program_end {}; |
| 1391 | }; |
| 1392 | |
| 1393 | typedef std::unique_ptr<line_header> line_header_up; |
| 1394 | |
| 1395 | const char * |
| 1396 | file_entry::include_dir (const line_header *lh) const |
| 1397 | { |
| 1398 | return lh->include_dir_at (d_index); |
| 1399 | } |
| 1400 | |
| 1401 | /* When we construct a partial symbol table entry we only |
| 1402 | need this much information. */ |
| 1403 | struct partial_die_info |
| 1404 | { |
| 1405 | /* Offset of this DIE. */ |
| 1406 | sect_offset sect_off; |
| 1407 | |
| 1408 | /* DWARF-2 tag for this DIE. */ |
| 1409 | ENUM_BITFIELD(dwarf_tag) tag : 16; |
| 1410 | |
| 1411 | /* Assorted flags describing the data found in this DIE. */ |
| 1412 | unsigned int has_children : 1; |
| 1413 | unsigned int is_external : 1; |
| 1414 | unsigned int is_declaration : 1; |
| 1415 | unsigned int has_type : 1; |
| 1416 | unsigned int has_specification : 1; |
| 1417 | unsigned int has_pc_info : 1; |
| 1418 | unsigned int may_be_inlined : 1; |
| 1419 | |
| 1420 | /* This DIE has been marked DW_AT_main_subprogram. */ |
| 1421 | unsigned int main_subprogram : 1; |
| 1422 | |
| 1423 | /* Flag set if the SCOPE field of this structure has been |
| 1424 | computed. */ |
| 1425 | unsigned int scope_set : 1; |
| 1426 | |
| 1427 | /* Flag set if the DIE has a byte_size attribute. */ |
| 1428 | unsigned int has_byte_size : 1; |
| 1429 | |
| 1430 | /* Flag set if the DIE has a DW_AT_const_value attribute. */ |
| 1431 | unsigned int has_const_value : 1; |
| 1432 | |
| 1433 | /* Flag set if any of the DIE's children are template arguments. */ |
| 1434 | unsigned int has_template_arguments : 1; |
| 1435 | |
| 1436 | /* Flag set if fixup_partial_die has been called on this die. */ |
| 1437 | unsigned int fixup_called : 1; |
| 1438 | |
| 1439 | /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */ |
| 1440 | unsigned int is_dwz : 1; |
| 1441 | |
| 1442 | /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */ |
| 1443 | unsigned int spec_is_dwz : 1; |
| 1444 | |
| 1445 | /* The name of this DIE. Normally the value of DW_AT_name, but |
| 1446 | sometimes a default name for unnamed DIEs. */ |
| 1447 | const char *name; |
| 1448 | |
| 1449 | /* The linkage name, if present. */ |
| 1450 | const char *linkage_name; |
| 1451 | |
| 1452 | /* The scope to prepend to our children. This is generally |
| 1453 | allocated on the comp_unit_obstack, so will disappear |
| 1454 | when this compilation unit leaves the cache. */ |
| 1455 | const char *scope; |
| 1456 | |
| 1457 | /* Some data associated with the partial DIE. The tag determines |
| 1458 | which field is live. */ |
| 1459 | union |
| 1460 | { |
| 1461 | /* The location description associated with this DIE, if any. */ |
| 1462 | struct dwarf_block *locdesc; |
| 1463 | /* The offset of an import, for DW_TAG_imported_unit. */ |
| 1464 | sect_offset sect_off; |
| 1465 | } d; |
| 1466 | |
| 1467 | /* If HAS_PC_INFO, the PC range associated with this DIE. */ |
| 1468 | CORE_ADDR lowpc; |
| 1469 | CORE_ADDR highpc; |
| 1470 | |
| 1471 | /* Pointer into the info_buffer (or types_buffer) pointing at the target of |
| 1472 | DW_AT_sibling, if any. */ |
| 1473 | /* NOTE: This member isn't strictly necessary, read_partial_die could |
| 1474 | return DW_AT_sibling values to its caller load_partial_dies. */ |
| 1475 | const gdb_byte *sibling; |
| 1476 | |
| 1477 | /* If HAS_SPECIFICATION, the offset of the DIE referred to by |
| 1478 | DW_AT_specification (or DW_AT_abstract_origin or |
| 1479 | DW_AT_extension). */ |
| 1480 | sect_offset spec_offset; |
| 1481 | |
| 1482 | /* Pointers to this DIE's parent, first child, and next sibling, |
| 1483 | if any. */ |
| 1484 | struct partial_die_info *die_parent, *die_child, *die_sibling; |
| 1485 | }; |
| 1486 | |
| 1487 | /* This data structure holds the information of an abbrev. */ |
| 1488 | struct abbrev_info |
| 1489 | { |
| 1490 | unsigned int number; /* number identifying abbrev */ |
| 1491 | enum dwarf_tag tag; /* dwarf tag */ |
| 1492 | unsigned short has_children; /* boolean */ |
| 1493 | unsigned short num_attrs; /* number of attributes */ |
| 1494 | struct attr_abbrev *attrs; /* an array of attribute descriptions */ |
| 1495 | struct abbrev_info *next; /* next in chain */ |
| 1496 | }; |
| 1497 | |
| 1498 | struct attr_abbrev |
| 1499 | { |
| 1500 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
| 1501 | ENUM_BITFIELD(dwarf_form) form : 16; |
| 1502 | |
| 1503 | /* It is valid only if FORM is DW_FORM_implicit_const. */ |
| 1504 | LONGEST implicit_const; |
| 1505 | }; |
| 1506 | |
| 1507 | /* Size of abbrev_table.abbrev_hash_table. */ |
| 1508 | #define ABBREV_HASH_SIZE 121 |
| 1509 | |
| 1510 | /* Top level data structure to contain an abbreviation table. */ |
| 1511 | |
| 1512 | struct abbrev_table |
| 1513 | { |
| 1514 | explicit abbrev_table (sect_offset off) |
| 1515 | : sect_off (off) |
| 1516 | { |
| 1517 | m_abbrevs = |
| 1518 | XOBNEWVEC (&abbrev_obstack, struct abbrev_info *, ABBREV_HASH_SIZE); |
| 1519 | memset (m_abbrevs, 0, ABBREV_HASH_SIZE * sizeof (struct abbrev_info *)); |
| 1520 | } |
| 1521 | |
| 1522 | DISABLE_COPY_AND_ASSIGN (abbrev_table); |
| 1523 | |
| 1524 | /* Allocate space for a struct abbrev_info object in |
| 1525 | ABBREV_TABLE. */ |
| 1526 | struct abbrev_info *alloc_abbrev (); |
| 1527 | |
| 1528 | /* Add an abbreviation to the table. */ |
| 1529 | void add_abbrev (unsigned int abbrev_number, struct abbrev_info *abbrev); |
| 1530 | |
| 1531 | /* Look up an abbrev in the table. |
| 1532 | Returns NULL if the abbrev is not found. */ |
| 1533 | |
| 1534 | struct abbrev_info *lookup_abbrev (unsigned int abbrev_number); |
| 1535 | |
| 1536 | |
| 1537 | /* Where the abbrev table came from. |
| 1538 | This is used as a sanity check when the table is used. */ |
| 1539 | const sect_offset sect_off; |
| 1540 | |
| 1541 | /* Storage for the abbrev table. */ |
| 1542 | auto_obstack abbrev_obstack; |
| 1543 | |
| 1544 | private: |
| 1545 | |
| 1546 | /* Hash table of abbrevs. |
| 1547 | This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack. |
| 1548 | It could be statically allocated, but the previous code didn't so we |
| 1549 | don't either. */ |
| 1550 | struct abbrev_info **m_abbrevs; |
| 1551 | }; |
| 1552 | |
| 1553 | typedef std::unique_ptr<struct abbrev_table> abbrev_table_up; |
| 1554 | |
| 1555 | /* Attributes have a name and a value. */ |
| 1556 | struct attribute |
| 1557 | { |
| 1558 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
| 1559 | ENUM_BITFIELD(dwarf_form) form : 15; |
| 1560 | |
| 1561 | /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This |
| 1562 | field should be in u.str (existing only for DW_STRING) but it is kept |
| 1563 | here for better struct attribute alignment. */ |
| 1564 | unsigned int string_is_canonical : 1; |
| 1565 | |
| 1566 | union |
| 1567 | { |
| 1568 | const char *str; |
| 1569 | struct dwarf_block *blk; |
| 1570 | ULONGEST unsnd; |
| 1571 | LONGEST snd; |
| 1572 | CORE_ADDR addr; |
| 1573 | ULONGEST signature; |
| 1574 | } |
| 1575 | u; |
| 1576 | }; |
| 1577 | |
| 1578 | /* This data structure holds a complete die structure. */ |
| 1579 | struct die_info |
| 1580 | { |
| 1581 | /* DWARF-2 tag for this DIE. */ |
| 1582 | ENUM_BITFIELD(dwarf_tag) tag : 16; |
| 1583 | |
| 1584 | /* Number of attributes */ |
| 1585 | unsigned char num_attrs; |
| 1586 | |
| 1587 | /* True if we're presently building the full type name for the |
| 1588 | type derived from this DIE. */ |
| 1589 | unsigned char building_fullname : 1; |
| 1590 | |
| 1591 | /* True if this die is in process. PR 16581. */ |
| 1592 | unsigned char in_process : 1; |
| 1593 | |
| 1594 | /* Abbrev number */ |
| 1595 | unsigned int abbrev; |
| 1596 | |
| 1597 | /* Offset in .debug_info or .debug_types section. */ |
| 1598 | sect_offset sect_off; |
| 1599 | |
| 1600 | /* The dies in a compilation unit form an n-ary tree. PARENT |
| 1601 | points to this die's parent; CHILD points to the first child of |
| 1602 | this node; and all the children of a given node are chained |
| 1603 | together via their SIBLING fields. */ |
| 1604 | struct die_info *child; /* Its first child, if any. */ |
| 1605 | struct die_info *sibling; /* Its next sibling, if any. */ |
| 1606 | struct die_info *parent; /* Its parent, if any. */ |
| 1607 | |
| 1608 | /* An array of attributes, with NUM_ATTRS elements. There may be |
| 1609 | zero, but it's not common and zero-sized arrays are not |
| 1610 | sufficiently portable C. */ |
| 1611 | struct attribute attrs[1]; |
| 1612 | }; |
| 1613 | |
| 1614 | /* Get at parts of an attribute structure. */ |
| 1615 | |
| 1616 | #define DW_STRING(attr) ((attr)->u.str) |
| 1617 | #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical) |
| 1618 | #define DW_UNSND(attr) ((attr)->u.unsnd) |
| 1619 | #define DW_BLOCK(attr) ((attr)->u.blk) |
| 1620 | #define DW_SND(attr) ((attr)->u.snd) |
| 1621 | #define DW_ADDR(attr) ((attr)->u.addr) |
| 1622 | #define DW_SIGNATURE(attr) ((attr)->u.signature) |
| 1623 | |
| 1624 | /* Blocks are a bunch of untyped bytes. */ |
| 1625 | struct dwarf_block |
| 1626 | { |
| 1627 | size_t size; |
| 1628 | |
| 1629 | /* Valid only if SIZE is not zero. */ |
| 1630 | const gdb_byte *data; |
| 1631 | }; |
| 1632 | |
| 1633 | #ifndef ATTR_ALLOC_CHUNK |
| 1634 | #define ATTR_ALLOC_CHUNK 4 |
| 1635 | #endif |
| 1636 | |
| 1637 | /* Allocate fields for structs, unions and enums in this size. */ |
| 1638 | #ifndef DW_FIELD_ALLOC_CHUNK |
| 1639 | #define DW_FIELD_ALLOC_CHUNK 4 |
| 1640 | #endif |
| 1641 | |
| 1642 | /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte, |
| 1643 | but this would require a corresponding change in unpack_field_as_long |
| 1644 | and friends. */ |
| 1645 | static int bits_per_byte = 8; |
| 1646 | |
| 1647 | struct nextfield |
| 1648 | { |
| 1649 | struct nextfield *next; |
| 1650 | int accessibility; |
| 1651 | int virtuality; |
| 1652 | struct field field; |
| 1653 | }; |
| 1654 | |
| 1655 | struct nextfnfield |
| 1656 | { |
| 1657 | struct nextfnfield *next; |
| 1658 | struct fn_field fnfield; |
| 1659 | }; |
| 1660 | |
| 1661 | struct fnfieldlist |
| 1662 | { |
| 1663 | const char *name; |
| 1664 | int length; |
| 1665 | struct nextfnfield *head; |
| 1666 | }; |
| 1667 | |
| 1668 | struct decl_field_list |
| 1669 | { |
| 1670 | struct decl_field field; |
| 1671 | struct decl_field_list *next; |
| 1672 | }; |
| 1673 | |
| 1674 | /* The routines that read and process dies for a C struct or C++ class |
| 1675 | pass lists of data member fields and lists of member function fields |
| 1676 | in an instance of a field_info structure, as defined below. */ |
| 1677 | struct field_info |
| 1678 | { |
| 1679 | /* List of data member and baseclasses fields. */ |
| 1680 | struct nextfield *fields, *baseclasses; |
| 1681 | |
| 1682 | /* Number of fields (including baseclasses). */ |
| 1683 | int nfields; |
| 1684 | |
| 1685 | /* Number of baseclasses. */ |
| 1686 | int nbaseclasses; |
| 1687 | |
| 1688 | /* Set if the accesibility of one of the fields is not public. */ |
| 1689 | int non_public_fields; |
| 1690 | |
| 1691 | /* Member function fieldlist array, contains name of possibly overloaded |
| 1692 | member function, number of overloaded member functions and a pointer |
| 1693 | to the head of the member function field chain. */ |
| 1694 | struct fnfieldlist *fnfieldlists; |
| 1695 | |
| 1696 | /* Number of entries in the fnfieldlists array. */ |
| 1697 | int nfnfields; |
| 1698 | |
| 1699 | /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of |
| 1700 | a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */ |
| 1701 | struct decl_field_list *typedef_field_list; |
| 1702 | unsigned typedef_field_list_count; |
| 1703 | |
| 1704 | /* Nested types defined by this class and the number of elements in this |
| 1705 | list. */ |
| 1706 | struct decl_field_list *nested_types_list; |
| 1707 | unsigned nested_types_list_count; |
| 1708 | }; |
| 1709 | |
| 1710 | /* One item on the queue of compilation units to read in full symbols |
| 1711 | for. */ |
| 1712 | struct dwarf2_queue_item |
| 1713 | { |
| 1714 | struct dwarf2_per_cu_data *per_cu; |
| 1715 | enum language pretend_language; |
| 1716 | struct dwarf2_queue_item *next; |
| 1717 | }; |
| 1718 | |
| 1719 | /* The current queue. */ |
| 1720 | static struct dwarf2_queue_item *dwarf2_queue, *dwarf2_queue_tail; |
| 1721 | |
| 1722 | /* Loaded secondary compilation units are kept in memory until they |
| 1723 | have not been referenced for the processing of this many |
| 1724 | compilation units. Set this to zero to disable caching. Cache |
| 1725 | sizes of up to at least twenty will improve startup time for |
| 1726 | typical inter-CU-reference binaries, at an obvious memory cost. */ |
| 1727 | static int dwarf_max_cache_age = 5; |
| 1728 | static void |
| 1729 | show_dwarf_max_cache_age (struct ui_file *file, int from_tty, |
| 1730 | struct cmd_list_element *c, const char *value) |
| 1731 | { |
| 1732 | fprintf_filtered (file, _("The upper bound on the age of cached " |
| 1733 | "DWARF compilation units is %s.\n"), |
| 1734 | value); |
| 1735 | } |
| 1736 | \f |
| 1737 | /* local function prototypes */ |
| 1738 | |
| 1739 | static const char *get_section_name (const struct dwarf2_section_info *); |
| 1740 | |
| 1741 | static const char *get_section_file_name (const struct dwarf2_section_info *); |
| 1742 | |
| 1743 | static void dwarf2_find_base_address (struct die_info *die, |
| 1744 | struct dwarf2_cu *cu); |
| 1745 | |
| 1746 | static struct partial_symtab *create_partial_symtab |
| 1747 | (struct dwarf2_per_cu_data *per_cu, const char *name); |
| 1748 | |
| 1749 | static void build_type_psymtabs_reader (const struct die_reader_specs *reader, |
| 1750 | const gdb_byte *info_ptr, |
| 1751 | struct die_info *type_unit_die, |
| 1752 | int has_children, void *data); |
| 1753 | |
| 1754 | static void dwarf2_build_psymtabs_hard |
| 1755 | (struct dwarf2_per_objfile *dwarf2_per_objfile); |
| 1756 | |
| 1757 | static void scan_partial_symbols (struct partial_die_info *, |
| 1758 | CORE_ADDR *, CORE_ADDR *, |
| 1759 | int, struct dwarf2_cu *); |
| 1760 | |
| 1761 | static void add_partial_symbol (struct partial_die_info *, |
| 1762 | struct dwarf2_cu *); |
| 1763 | |
| 1764 | static void add_partial_namespace (struct partial_die_info *pdi, |
| 1765 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
| 1766 | int set_addrmap, struct dwarf2_cu *cu); |
| 1767 | |
| 1768 | static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, |
| 1769 | CORE_ADDR *highpc, int set_addrmap, |
| 1770 | struct dwarf2_cu *cu); |
| 1771 | |
| 1772 | static void add_partial_enumeration (struct partial_die_info *enum_pdi, |
| 1773 | struct dwarf2_cu *cu); |
| 1774 | |
| 1775 | static void add_partial_subprogram (struct partial_die_info *pdi, |
| 1776 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
| 1777 | int need_pc, struct dwarf2_cu *cu); |
| 1778 | |
| 1779 | static void dwarf2_read_symtab (struct partial_symtab *, |
| 1780 | struct objfile *); |
| 1781 | |
| 1782 | static void psymtab_to_symtab_1 (struct partial_symtab *); |
| 1783 | |
| 1784 | static abbrev_table_up abbrev_table_read_table |
| 1785 | (struct dwarf2_per_objfile *dwarf2_per_objfile, struct dwarf2_section_info *, |
| 1786 | sect_offset); |
| 1787 | |
| 1788 | static unsigned int peek_abbrev_code (bfd *, const gdb_byte *); |
| 1789 | |
| 1790 | static struct partial_die_info *load_partial_dies |
| 1791 | (const struct die_reader_specs *, const gdb_byte *, int); |
| 1792 | |
| 1793 | static const gdb_byte *read_partial_die (const struct die_reader_specs *, |
| 1794 | struct partial_die_info *, |
| 1795 | struct abbrev_info *, |
| 1796 | unsigned int, |
| 1797 | const gdb_byte *); |
| 1798 | |
| 1799 | static struct partial_die_info *find_partial_die (sect_offset, int, |
| 1800 | struct dwarf2_cu *); |
| 1801 | |
| 1802 | static void fixup_partial_die (struct partial_die_info *, |
| 1803 | struct dwarf2_cu *); |
| 1804 | |
| 1805 | static const gdb_byte *read_attribute (const struct die_reader_specs *, |
| 1806 | struct attribute *, struct attr_abbrev *, |
| 1807 | const gdb_byte *); |
| 1808 | |
| 1809 | static unsigned int read_1_byte (bfd *, const gdb_byte *); |
| 1810 | |
| 1811 | static int read_1_signed_byte (bfd *, const gdb_byte *); |
| 1812 | |
| 1813 | static unsigned int read_2_bytes (bfd *, const gdb_byte *); |
| 1814 | |
| 1815 | static unsigned int read_4_bytes (bfd *, const gdb_byte *); |
| 1816 | |
| 1817 | static ULONGEST read_8_bytes (bfd *, const gdb_byte *); |
| 1818 | |
| 1819 | static CORE_ADDR read_address (bfd *, const gdb_byte *ptr, struct dwarf2_cu *, |
| 1820 | unsigned int *); |
| 1821 | |
| 1822 | static LONGEST read_initial_length (bfd *, const gdb_byte *, unsigned int *); |
| 1823 | |
| 1824 | static LONGEST read_checked_initial_length_and_offset |
| 1825 | (bfd *, const gdb_byte *, const struct comp_unit_head *, |
| 1826 | unsigned int *, unsigned int *); |
| 1827 | |
| 1828 | static LONGEST read_offset (bfd *, const gdb_byte *, |
| 1829 | const struct comp_unit_head *, |
| 1830 | unsigned int *); |
| 1831 | |
| 1832 | static LONGEST read_offset_1 (bfd *, const gdb_byte *, unsigned int); |
| 1833 | |
| 1834 | static sect_offset read_abbrev_offset |
| 1835 | (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 1836 | struct dwarf2_section_info *, sect_offset); |
| 1837 | |
| 1838 | static const gdb_byte *read_n_bytes (bfd *, const gdb_byte *, unsigned int); |
| 1839 | |
| 1840 | static const char *read_direct_string (bfd *, const gdb_byte *, unsigned int *); |
| 1841 | |
| 1842 | static const char *read_indirect_string |
| 1843 | (struct dwarf2_per_objfile *dwarf2_per_objfile, bfd *, const gdb_byte *, |
| 1844 | const struct comp_unit_head *, unsigned int *); |
| 1845 | |
| 1846 | static const char *read_indirect_line_string |
| 1847 | (struct dwarf2_per_objfile *dwarf2_per_objfile, bfd *, const gdb_byte *, |
| 1848 | const struct comp_unit_head *, unsigned int *); |
| 1849 | |
| 1850 | static const char *read_indirect_string_at_offset |
| 1851 | (struct dwarf2_per_objfile *dwarf2_per_objfile, bfd *abfd, |
| 1852 | LONGEST str_offset); |
| 1853 | |
| 1854 | static const char *read_indirect_string_from_dwz |
| 1855 | (struct objfile *objfile, struct dwz_file *, LONGEST); |
| 1856 | |
| 1857 | static LONGEST read_signed_leb128 (bfd *, const gdb_byte *, unsigned int *); |
| 1858 | |
| 1859 | static CORE_ADDR read_addr_index_from_leb128 (struct dwarf2_cu *, |
| 1860 | const gdb_byte *, |
| 1861 | unsigned int *); |
| 1862 | |
| 1863 | static const char *read_str_index (const struct die_reader_specs *reader, |
| 1864 | ULONGEST str_index); |
| 1865 | |
| 1866 | static void set_cu_language (unsigned int, struct dwarf2_cu *); |
| 1867 | |
| 1868 | static struct attribute *dwarf2_attr (struct die_info *, unsigned int, |
| 1869 | struct dwarf2_cu *); |
| 1870 | |
| 1871 | static struct attribute *dwarf2_attr_no_follow (struct die_info *, |
| 1872 | unsigned int); |
| 1873 | |
| 1874 | static const char *dwarf2_string_attr (struct die_info *die, unsigned int name, |
| 1875 | struct dwarf2_cu *cu); |
| 1876 | |
| 1877 | static int dwarf2_flag_true_p (struct die_info *die, unsigned name, |
| 1878 | struct dwarf2_cu *cu); |
| 1879 | |
| 1880 | static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu); |
| 1881 | |
| 1882 | static struct die_info *die_specification (struct die_info *die, |
| 1883 | struct dwarf2_cu **); |
| 1884 | |
| 1885 | static line_header_up dwarf_decode_line_header (sect_offset sect_off, |
| 1886 | struct dwarf2_cu *cu); |
| 1887 | |
| 1888 | static void dwarf_decode_lines (struct line_header *, const char *, |
| 1889 | struct dwarf2_cu *, struct partial_symtab *, |
| 1890 | CORE_ADDR, int decode_mapping); |
| 1891 | |
| 1892 | static void dwarf2_start_subfile (const char *, const char *); |
| 1893 | |
| 1894 | static struct compunit_symtab *dwarf2_start_symtab (struct dwarf2_cu *, |
| 1895 | const char *, const char *, |
| 1896 | CORE_ADDR); |
| 1897 | |
| 1898 | static struct symbol *new_symbol (struct die_info *, struct type *, |
| 1899 | struct dwarf2_cu *, struct symbol * = NULL); |
| 1900 | |
| 1901 | static void dwarf2_const_value (const struct attribute *, struct symbol *, |
| 1902 | struct dwarf2_cu *); |
| 1903 | |
| 1904 | static void dwarf2_const_value_attr (const struct attribute *attr, |
| 1905 | struct type *type, |
| 1906 | const char *name, |
| 1907 | struct obstack *obstack, |
| 1908 | struct dwarf2_cu *cu, LONGEST *value, |
| 1909 | const gdb_byte **bytes, |
| 1910 | struct dwarf2_locexpr_baton **baton); |
| 1911 | |
| 1912 | static struct type *die_type (struct die_info *, struct dwarf2_cu *); |
| 1913 | |
| 1914 | static int need_gnat_info (struct dwarf2_cu *); |
| 1915 | |
| 1916 | static struct type *die_descriptive_type (struct die_info *, |
| 1917 | struct dwarf2_cu *); |
| 1918 | |
| 1919 | static void set_descriptive_type (struct type *, struct die_info *, |
| 1920 | struct dwarf2_cu *); |
| 1921 | |
| 1922 | static struct type *die_containing_type (struct die_info *, |
| 1923 | struct dwarf2_cu *); |
| 1924 | |
| 1925 | static struct type *lookup_die_type (struct die_info *, const struct attribute *, |
| 1926 | struct dwarf2_cu *); |
| 1927 | |
| 1928 | static struct type *read_type_die (struct die_info *, struct dwarf2_cu *); |
| 1929 | |
| 1930 | static struct type *read_type_die_1 (struct die_info *, struct dwarf2_cu *); |
| 1931 | |
| 1932 | static const char *determine_prefix (struct die_info *die, struct dwarf2_cu *); |
| 1933 | |
| 1934 | static char *typename_concat (struct obstack *obs, const char *prefix, |
| 1935 | const char *suffix, int physname, |
| 1936 | struct dwarf2_cu *cu); |
| 1937 | |
| 1938 | static void read_file_scope (struct die_info *, struct dwarf2_cu *); |
| 1939 | |
| 1940 | static void read_type_unit_scope (struct die_info *, struct dwarf2_cu *); |
| 1941 | |
| 1942 | static void read_func_scope (struct die_info *, struct dwarf2_cu *); |
| 1943 | |
| 1944 | static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *); |
| 1945 | |
| 1946 | static void read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu); |
| 1947 | |
| 1948 | static void read_variable (struct die_info *die, struct dwarf2_cu *cu); |
| 1949 | |
| 1950 | static int dwarf2_ranges_read (unsigned, CORE_ADDR *, CORE_ADDR *, |
| 1951 | struct dwarf2_cu *, struct partial_symtab *); |
| 1952 | |
| 1953 | /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return |
| 1954 | values. Keep the items ordered with increasing constraints compliance. */ |
| 1955 | enum pc_bounds_kind |
| 1956 | { |
| 1957 | /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */ |
| 1958 | PC_BOUNDS_NOT_PRESENT, |
| 1959 | |
| 1960 | /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges |
| 1961 | were present but they do not form a valid range of PC addresses. */ |
| 1962 | PC_BOUNDS_INVALID, |
| 1963 | |
| 1964 | /* Discontiguous range was found - that is DW_AT_ranges was found. */ |
| 1965 | PC_BOUNDS_RANGES, |
| 1966 | |
| 1967 | /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */ |
| 1968 | PC_BOUNDS_HIGH_LOW, |
| 1969 | }; |
| 1970 | |
| 1971 | static enum pc_bounds_kind dwarf2_get_pc_bounds (struct die_info *, |
| 1972 | CORE_ADDR *, CORE_ADDR *, |
| 1973 | struct dwarf2_cu *, |
| 1974 | struct partial_symtab *); |
| 1975 | |
| 1976 | static void get_scope_pc_bounds (struct die_info *, |
| 1977 | CORE_ADDR *, CORE_ADDR *, |
| 1978 | struct dwarf2_cu *); |
| 1979 | |
| 1980 | static void dwarf2_record_block_ranges (struct die_info *, struct block *, |
| 1981 | CORE_ADDR, struct dwarf2_cu *); |
| 1982 | |
| 1983 | static void dwarf2_add_field (struct field_info *, struct die_info *, |
| 1984 | struct dwarf2_cu *); |
| 1985 | |
| 1986 | static void dwarf2_attach_fields_to_type (struct field_info *, |
| 1987 | struct type *, struct dwarf2_cu *); |
| 1988 | |
| 1989 | static void dwarf2_add_member_fn (struct field_info *, |
| 1990 | struct die_info *, struct type *, |
| 1991 | struct dwarf2_cu *); |
| 1992 | |
| 1993 | static void dwarf2_attach_fn_fields_to_type (struct field_info *, |
| 1994 | struct type *, |
| 1995 | struct dwarf2_cu *); |
| 1996 | |
| 1997 | static void process_structure_scope (struct die_info *, struct dwarf2_cu *); |
| 1998 | |
| 1999 | static void read_common_block (struct die_info *, struct dwarf2_cu *); |
| 2000 | |
| 2001 | static void read_namespace (struct die_info *die, struct dwarf2_cu *); |
| 2002 | |
| 2003 | static void read_module (struct die_info *die, struct dwarf2_cu *cu); |
| 2004 | |
| 2005 | static struct using_direct **using_directives (enum language); |
| 2006 | |
| 2007 | static void read_import_statement (struct die_info *die, struct dwarf2_cu *); |
| 2008 | |
| 2009 | static int read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu); |
| 2010 | |
| 2011 | static struct type *read_module_type (struct die_info *die, |
| 2012 | struct dwarf2_cu *cu); |
| 2013 | |
| 2014 | static const char *namespace_name (struct die_info *die, |
| 2015 | int *is_anonymous, struct dwarf2_cu *); |
| 2016 | |
| 2017 | static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *); |
| 2018 | |
| 2019 | static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *); |
| 2020 | |
| 2021 | static enum dwarf_array_dim_ordering read_array_order (struct die_info *, |
| 2022 | struct dwarf2_cu *); |
| 2023 | |
| 2024 | static struct die_info *read_die_and_siblings_1 |
| 2025 | (const struct die_reader_specs *, const gdb_byte *, const gdb_byte **, |
| 2026 | struct die_info *); |
| 2027 | |
| 2028 | static struct die_info *read_die_and_siblings (const struct die_reader_specs *, |
| 2029 | const gdb_byte *info_ptr, |
| 2030 | const gdb_byte **new_info_ptr, |
| 2031 | struct die_info *parent); |
| 2032 | |
| 2033 | static const gdb_byte *read_full_die_1 (const struct die_reader_specs *, |
| 2034 | struct die_info **, const gdb_byte *, |
| 2035 | int *, int); |
| 2036 | |
| 2037 | static const gdb_byte *read_full_die (const struct die_reader_specs *, |
| 2038 | struct die_info **, const gdb_byte *, |
| 2039 | int *); |
| 2040 | |
| 2041 | static void process_die (struct die_info *, struct dwarf2_cu *); |
| 2042 | |
| 2043 | static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu *, |
| 2044 | struct obstack *); |
| 2045 | |
| 2046 | static const char *dwarf2_name (struct die_info *die, struct dwarf2_cu *); |
| 2047 | |
| 2048 | static const char *dwarf2_full_name (const char *name, |
| 2049 | struct die_info *die, |
| 2050 | struct dwarf2_cu *cu); |
| 2051 | |
| 2052 | static const char *dwarf2_physname (const char *name, struct die_info *die, |
| 2053 | struct dwarf2_cu *cu); |
| 2054 | |
| 2055 | static struct die_info *dwarf2_extension (struct die_info *die, |
| 2056 | struct dwarf2_cu **); |
| 2057 | |
| 2058 | static const char *dwarf_tag_name (unsigned int); |
| 2059 | |
| 2060 | static const char *dwarf_attr_name (unsigned int); |
| 2061 | |
| 2062 | static const char *dwarf_form_name (unsigned int); |
| 2063 | |
| 2064 | static const char *dwarf_bool_name (unsigned int); |
| 2065 | |
| 2066 | static const char *dwarf_type_encoding_name (unsigned int); |
| 2067 | |
| 2068 | static struct die_info *sibling_die (struct die_info *); |
| 2069 | |
| 2070 | static void dump_die_shallow (struct ui_file *, int indent, struct die_info *); |
| 2071 | |
| 2072 | static void dump_die_for_error (struct die_info *); |
| 2073 | |
| 2074 | static void dump_die_1 (struct ui_file *, int level, int max_level, |
| 2075 | struct die_info *); |
| 2076 | |
| 2077 | /*static*/ void dump_die (struct die_info *, int max_level); |
| 2078 | |
| 2079 | static void store_in_ref_table (struct die_info *, |
| 2080 | struct dwarf2_cu *); |
| 2081 | |
| 2082 | static sect_offset dwarf2_get_ref_die_offset (const struct attribute *); |
| 2083 | |
| 2084 | static LONGEST dwarf2_get_attr_constant_value (const struct attribute *, int); |
| 2085 | |
| 2086 | static struct die_info *follow_die_ref_or_sig (struct die_info *, |
| 2087 | const struct attribute *, |
| 2088 | struct dwarf2_cu **); |
| 2089 | |
| 2090 | static struct die_info *follow_die_ref (struct die_info *, |
| 2091 | const struct attribute *, |
| 2092 | struct dwarf2_cu **); |
| 2093 | |
| 2094 | static struct die_info *follow_die_sig (struct die_info *, |
| 2095 | const struct attribute *, |
| 2096 | struct dwarf2_cu **); |
| 2097 | |
| 2098 | static struct type *get_signatured_type (struct die_info *, ULONGEST, |
| 2099 | struct dwarf2_cu *); |
| 2100 | |
| 2101 | static struct type *get_DW_AT_signature_type (struct die_info *, |
| 2102 | const struct attribute *, |
| 2103 | struct dwarf2_cu *); |
| 2104 | |
| 2105 | static void load_full_type_unit (struct dwarf2_per_cu_data *per_cu); |
| 2106 | |
| 2107 | static void read_signatured_type (struct signatured_type *); |
| 2108 | |
| 2109 | static int attr_to_dynamic_prop (const struct attribute *attr, |
| 2110 | struct die_info *die, struct dwarf2_cu *cu, |
| 2111 | struct dynamic_prop *prop); |
| 2112 | |
| 2113 | /* memory allocation interface */ |
| 2114 | |
| 2115 | static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *); |
| 2116 | |
| 2117 | static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int); |
| 2118 | |
| 2119 | static void dwarf_decode_macros (struct dwarf2_cu *, unsigned int, int); |
| 2120 | |
| 2121 | static int attr_form_is_block (const struct attribute *); |
| 2122 | |
| 2123 | static int attr_form_is_section_offset (const struct attribute *); |
| 2124 | |
| 2125 | static int attr_form_is_constant (const struct attribute *); |
| 2126 | |
| 2127 | static int attr_form_is_ref (const struct attribute *); |
| 2128 | |
| 2129 | static void fill_in_loclist_baton (struct dwarf2_cu *cu, |
| 2130 | struct dwarf2_loclist_baton *baton, |
| 2131 | const struct attribute *attr); |
| 2132 | |
| 2133 | static void dwarf2_symbol_mark_computed (const struct attribute *attr, |
| 2134 | struct symbol *sym, |
| 2135 | struct dwarf2_cu *cu, |
| 2136 | int is_block); |
| 2137 | |
| 2138 | static const gdb_byte *skip_one_die (const struct die_reader_specs *reader, |
| 2139 | const gdb_byte *info_ptr, |
| 2140 | struct abbrev_info *abbrev); |
| 2141 | |
| 2142 | static hashval_t partial_die_hash (const void *item); |
| 2143 | |
| 2144 | static int partial_die_eq (const void *item_lhs, const void *item_rhs); |
| 2145 | |
| 2146 | static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit |
| 2147 | (sect_offset sect_off, unsigned int offset_in_dwz, |
| 2148 | struct dwarf2_per_objfile *dwarf2_per_objfile); |
| 2149 | |
| 2150 | static void prepare_one_comp_unit (struct dwarf2_cu *cu, |
| 2151 | struct die_info *comp_unit_die, |
| 2152 | enum language pretend_language); |
| 2153 | |
| 2154 | static void free_cached_comp_units (void *); |
| 2155 | |
| 2156 | static void age_cached_comp_units (struct dwarf2_per_objfile *dwarf2_per_objfile); |
| 2157 | |
| 2158 | static void free_one_cached_comp_unit (struct dwarf2_per_cu_data *); |
| 2159 | |
| 2160 | static struct type *set_die_type (struct die_info *, struct type *, |
| 2161 | struct dwarf2_cu *); |
| 2162 | |
| 2163 | static void create_all_comp_units (struct dwarf2_per_objfile *dwarf2_per_objfile); |
| 2164 | |
| 2165 | static int create_all_type_units (struct dwarf2_per_objfile *dwarf2_per_objfile); |
| 2166 | |
| 2167 | static void load_full_comp_unit (struct dwarf2_per_cu_data *, |
| 2168 | enum language); |
| 2169 | |
| 2170 | static void process_full_comp_unit (struct dwarf2_per_cu_data *, |
| 2171 | enum language); |
| 2172 | |
| 2173 | static void process_full_type_unit (struct dwarf2_per_cu_data *, |
| 2174 | enum language); |
| 2175 | |
| 2176 | static void dwarf2_add_dependence (struct dwarf2_cu *, |
| 2177 | struct dwarf2_per_cu_data *); |
| 2178 | |
| 2179 | static void dwarf2_mark (struct dwarf2_cu *); |
| 2180 | |
| 2181 | static void dwarf2_clear_marks (struct dwarf2_per_cu_data *); |
| 2182 | |
| 2183 | static struct type *get_die_type_at_offset (sect_offset, |
| 2184 | struct dwarf2_per_cu_data *); |
| 2185 | |
| 2186 | static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu); |
| 2187 | |
| 2188 | static void queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
| 2189 | enum language pretend_language); |
| 2190 | |
| 2191 | static void process_queue (struct dwarf2_per_objfile *dwarf2_per_objfile); |
| 2192 | |
| 2193 | /* Class, the destructor of which frees all allocated queue entries. This |
| 2194 | will only have work to do if an error was thrown while processing the |
| 2195 | dwarf. If no error was thrown then the queue entries should have all |
| 2196 | been processed, and freed, as we went along. */ |
| 2197 | |
| 2198 | class dwarf2_queue_guard |
| 2199 | { |
| 2200 | public: |
| 2201 | dwarf2_queue_guard () = default; |
| 2202 | |
| 2203 | /* Free any entries remaining on the queue. There should only be |
| 2204 | entries left if we hit an error while processing the dwarf. */ |
| 2205 | ~dwarf2_queue_guard () |
| 2206 | { |
| 2207 | struct dwarf2_queue_item *item, *last; |
| 2208 | |
| 2209 | item = dwarf2_queue; |
| 2210 | while (item) |
| 2211 | { |
| 2212 | /* Anything still marked queued is likely to be in an |
| 2213 | inconsistent state, so discard it. */ |
| 2214 | if (item->per_cu->queued) |
| 2215 | { |
| 2216 | if (item->per_cu->cu != NULL) |
| 2217 | free_one_cached_comp_unit (item->per_cu); |
| 2218 | item->per_cu->queued = 0; |
| 2219 | } |
| 2220 | |
| 2221 | last = item; |
| 2222 | item = item->next; |
| 2223 | xfree (last); |
| 2224 | } |
| 2225 | |
| 2226 | dwarf2_queue = dwarf2_queue_tail = NULL; |
| 2227 | } |
| 2228 | }; |
| 2229 | |
| 2230 | /* The return type of find_file_and_directory. Note, the enclosed |
| 2231 | string pointers are only valid while this object is valid. */ |
| 2232 | |
| 2233 | struct file_and_directory |
| 2234 | { |
| 2235 | /* The filename. This is never NULL. */ |
| 2236 | const char *name; |
| 2237 | |
| 2238 | /* The compilation directory. NULL if not known. If we needed to |
| 2239 | compute a new string, this points to COMP_DIR_STORAGE, otherwise, |
| 2240 | points directly to the DW_AT_comp_dir string attribute owned by |
| 2241 | the obstack that owns the DIE. */ |
| 2242 | const char *comp_dir; |
| 2243 | |
| 2244 | /* If we needed to build a new string for comp_dir, this is what |
| 2245 | owns the storage. */ |
| 2246 | std::string comp_dir_storage; |
| 2247 | }; |
| 2248 | |
| 2249 | static file_and_directory find_file_and_directory (struct die_info *die, |
| 2250 | struct dwarf2_cu *cu); |
| 2251 | |
| 2252 | static char *file_full_name (int file, struct line_header *lh, |
| 2253 | const char *comp_dir); |
| 2254 | |
| 2255 | /* Expected enum dwarf_unit_type for read_comp_unit_head. */ |
| 2256 | enum class rcuh_kind { COMPILE, TYPE }; |
| 2257 | |
| 2258 | static const gdb_byte *read_and_check_comp_unit_head |
| 2259 | (struct dwarf2_per_objfile* dwarf2_per_objfile, |
| 2260 | struct comp_unit_head *header, |
| 2261 | struct dwarf2_section_info *section, |
| 2262 | struct dwarf2_section_info *abbrev_section, const gdb_byte *info_ptr, |
| 2263 | rcuh_kind section_kind); |
| 2264 | |
| 2265 | static void init_cutu_and_read_dies |
| 2266 | (struct dwarf2_per_cu_data *this_cu, struct abbrev_table *abbrev_table, |
| 2267 | int use_existing_cu, int keep, |
| 2268 | die_reader_func_ftype *die_reader_func, void *data); |
| 2269 | |
| 2270 | static void init_cutu_and_read_dies_simple |
| 2271 | (struct dwarf2_per_cu_data *this_cu, |
| 2272 | die_reader_func_ftype *die_reader_func, void *data); |
| 2273 | |
| 2274 | static htab_t allocate_signatured_type_table (struct objfile *objfile); |
| 2275 | |
| 2276 | static htab_t allocate_dwo_unit_table (struct objfile *objfile); |
| 2277 | |
| 2278 | static struct dwo_unit *lookup_dwo_unit_in_dwp |
| 2279 | (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 2280 | struct dwp_file *dwp_file, const char *comp_dir, |
| 2281 | ULONGEST signature, int is_debug_types); |
| 2282 | |
| 2283 | static struct dwp_file *get_dwp_file |
| 2284 | (struct dwarf2_per_objfile *dwarf2_per_objfile); |
| 2285 | |
| 2286 | static struct dwo_unit *lookup_dwo_comp_unit |
| 2287 | (struct dwarf2_per_cu_data *, const char *, const char *, ULONGEST); |
| 2288 | |
| 2289 | static struct dwo_unit *lookup_dwo_type_unit |
| 2290 | (struct signatured_type *, const char *, const char *); |
| 2291 | |
| 2292 | static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *); |
| 2293 | |
| 2294 | static void free_dwo_file_cleanup (void *); |
| 2295 | |
| 2296 | struct free_dwo_file_cleanup_data |
| 2297 | { |
| 2298 | struct dwo_file *dwo_file; |
| 2299 | struct dwarf2_per_objfile *dwarf2_per_objfile; |
| 2300 | }; |
| 2301 | |
| 2302 | static void process_cu_includes (struct dwarf2_per_objfile *dwarf2_per_objfile); |
| 2303 | |
| 2304 | static void check_producer (struct dwarf2_cu *cu); |
| 2305 | |
| 2306 | static void free_line_header_voidp (void *arg); |
| 2307 | \f |
| 2308 | /* Various complaints about symbol reading that don't abort the process. */ |
| 2309 | |
| 2310 | static void |
| 2311 | dwarf2_statement_list_fits_in_line_number_section_complaint (void) |
| 2312 | { |
| 2313 | complaint (&symfile_complaints, |
| 2314 | _("statement list doesn't fit in .debug_line section")); |
| 2315 | } |
| 2316 | |
| 2317 | static void |
| 2318 | dwarf2_debug_line_missing_file_complaint (void) |
| 2319 | { |
| 2320 | complaint (&symfile_complaints, |
| 2321 | _(".debug_line section has line data without a file")); |
| 2322 | } |
| 2323 | |
| 2324 | static void |
| 2325 | dwarf2_debug_line_missing_end_sequence_complaint (void) |
| 2326 | { |
| 2327 | complaint (&symfile_complaints, |
| 2328 | _(".debug_line section has line " |
| 2329 | "program sequence without an end")); |
| 2330 | } |
| 2331 | |
| 2332 | static void |
| 2333 | dwarf2_complex_location_expr_complaint (void) |
| 2334 | { |
| 2335 | complaint (&symfile_complaints, _("location expression too complex")); |
| 2336 | } |
| 2337 | |
| 2338 | static void |
| 2339 | dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2, |
| 2340 | int arg3) |
| 2341 | { |
| 2342 | complaint (&symfile_complaints, |
| 2343 | _("const value length mismatch for '%s', got %d, expected %d"), |
| 2344 | arg1, arg2, arg3); |
| 2345 | } |
| 2346 | |
| 2347 | static void |
| 2348 | dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info *section) |
| 2349 | { |
| 2350 | complaint (&symfile_complaints, |
| 2351 | _("debug info runs off end of %s section" |
| 2352 | " [in module %s]"), |
| 2353 | get_section_name (section), |
| 2354 | get_section_file_name (section)); |
| 2355 | } |
| 2356 | |
| 2357 | static void |
| 2358 | dwarf2_macro_malformed_definition_complaint (const char *arg1) |
| 2359 | { |
| 2360 | complaint (&symfile_complaints, |
| 2361 | _("macro debug info contains a " |
| 2362 | "malformed macro definition:\n`%s'"), |
| 2363 | arg1); |
| 2364 | } |
| 2365 | |
| 2366 | static void |
| 2367 | dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2) |
| 2368 | { |
| 2369 | complaint (&symfile_complaints, |
| 2370 | _("invalid attribute class or form for '%s' in '%s'"), |
| 2371 | arg1, arg2); |
| 2372 | } |
| 2373 | |
| 2374 | /* Hash function for line_header_hash. */ |
| 2375 | |
| 2376 | static hashval_t |
| 2377 | line_header_hash (const struct line_header *ofs) |
| 2378 | { |
| 2379 | return to_underlying (ofs->sect_off) ^ ofs->offset_in_dwz; |
| 2380 | } |
| 2381 | |
| 2382 | /* Hash function for htab_create_alloc_ex for line_header_hash. */ |
| 2383 | |
| 2384 | static hashval_t |
| 2385 | line_header_hash_voidp (const void *item) |
| 2386 | { |
| 2387 | const struct line_header *ofs = (const struct line_header *) item; |
| 2388 | |
| 2389 | return line_header_hash (ofs); |
| 2390 | } |
| 2391 | |
| 2392 | /* Equality function for line_header_hash. */ |
| 2393 | |
| 2394 | static int |
| 2395 | line_header_eq_voidp (const void *item_lhs, const void *item_rhs) |
| 2396 | { |
| 2397 | const struct line_header *ofs_lhs = (const struct line_header *) item_lhs; |
| 2398 | const struct line_header *ofs_rhs = (const struct line_header *) item_rhs; |
| 2399 | |
| 2400 | return (ofs_lhs->sect_off == ofs_rhs->sect_off |
| 2401 | && ofs_lhs->offset_in_dwz == ofs_rhs->offset_in_dwz); |
| 2402 | } |
| 2403 | |
| 2404 | \f |
| 2405 | |
| 2406 | /* Read the given attribute value as an address, taking the attribute's |
| 2407 | form into account. */ |
| 2408 | |
| 2409 | static CORE_ADDR |
| 2410 | attr_value_as_address (struct attribute *attr) |
| 2411 | { |
| 2412 | CORE_ADDR addr; |
| 2413 | |
| 2414 | if (attr->form != DW_FORM_addr && attr->form != DW_FORM_GNU_addr_index) |
| 2415 | { |
| 2416 | /* Aside from a few clearly defined exceptions, attributes that |
| 2417 | contain an address must always be in DW_FORM_addr form. |
| 2418 | Unfortunately, some compilers happen to be violating this |
| 2419 | requirement by encoding addresses using other forms, such |
| 2420 | as DW_FORM_data4 for example. For those broken compilers, |
| 2421 | we try to do our best, without any guarantee of success, |
| 2422 | to interpret the address correctly. It would also be nice |
| 2423 | to generate a complaint, but that would require us to maintain |
| 2424 | a list of legitimate cases where a non-address form is allowed, |
| 2425 | as well as update callers to pass in at least the CU's DWARF |
| 2426 | version. This is more overhead than what we're willing to |
| 2427 | expand for a pretty rare case. */ |
| 2428 | addr = DW_UNSND (attr); |
| 2429 | } |
| 2430 | else |
| 2431 | addr = DW_ADDR (attr); |
| 2432 | |
| 2433 | return addr; |
| 2434 | } |
| 2435 | |
| 2436 | /* The suffix for an index file. */ |
| 2437 | #define INDEX4_SUFFIX ".gdb-index" |
| 2438 | #define INDEX5_SUFFIX ".debug_names" |
| 2439 | #define DEBUG_STR_SUFFIX ".debug_str" |
| 2440 | |
| 2441 | /* See declaration. */ |
| 2442 | |
| 2443 | dwarf2_per_objfile::dwarf2_per_objfile (struct objfile *objfile_, |
| 2444 | const dwarf2_debug_sections *names) |
| 2445 | : objfile (objfile_) |
| 2446 | { |
| 2447 | if (names == NULL) |
| 2448 | names = &dwarf2_elf_names; |
| 2449 | |
| 2450 | bfd *obfd = objfile->obfd; |
| 2451 | |
| 2452 | for (asection *sec = obfd->sections; sec != NULL; sec = sec->next) |
| 2453 | locate_sections (obfd, sec, *names); |
| 2454 | } |
| 2455 | |
| 2456 | static void free_dwo_files (htab_t dwo_files, struct objfile *objfile); |
| 2457 | |
| 2458 | dwarf2_per_objfile::~dwarf2_per_objfile () |
| 2459 | { |
| 2460 | /* Cached DIE trees use xmalloc and the comp_unit_obstack. */ |
| 2461 | free_cached_comp_units (); |
| 2462 | |
| 2463 | if (quick_file_names_table) |
| 2464 | htab_delete (quick_file_names_table); |
| 2465 | |
| 2466 | if (line_header_hash) |
| 2467 | htab_delete (line_header_hash); |
| 2468 | |
| 2469 | for (int ix = 0; ix < n_comp_units; ++ix) |
| 2470 | VEC_free (dwarf2_per_cu_ptr, all_comp_units[ix]->imported_symtabs); |
| 2471 | |
| 2472 | for (int ix = 0; ix < n_type_units; ++ix) |
| 2473 | VEC_free (dwarf2_per_cu_ptr, |
| 2474 | all_type_units[ix]->per_cu.imported_symtabs); |
| 2475 | xfree (all_type_units); |
| 2476 | |
| 2477 | VEC_free (dwarf2_section_info_def, types); |
| 2478 | |
| 2479 | if (dwo_files != NULL) |
| 2480 | free_dwo_files (dwo_files, objfile); |
| 2481 | if (dwp_file != NULL) |
| 2482 | gdb_bfd_unref (dwp_file->dbfd); |
| 2483 | |
| 2484 | if (dwz_file != NULL && dwz_file->dwz_bfd) |
| 2485 | gdb_bfd_unref (dwz_file->dwz_bfd); |
| 2486 | |
| 2487 | if (index_table != NULL) |
| 2488 | index_table->~mapped_index (); |
| 2489 | |
| 2490 | /* Everything else should be on the objfile obstack. */ |
| 2491 | } |
| 2492 | |
| 2493 | /* See declaration. */ |
| 2494 | |
| 2495 | void |
| 2496 | dwarf2_per_objfile::free_cached_comp_units () |
| 2497 | { |
| 2498 | dwarf2_per_cu_data *per_cu = read_in_chain; |
| 2499 | dwarf2_per_cu_data **last_chain = &read_in_chain; |
| 2500 | while (per_cu != NULL) |
| 2501 | { |
| 2502 | dwarf2_per_cu_data *next_cu = per_cu->cu->read_in_chain; |
| 2503 | |
| 2504 | delete per_cu->cu; |
| 2505 | *last_chain = next_cu; |
| 2506 | per_cu = next_cu; |
| 2507 | } |
| 2508 | } |
| 2509 | |
| 2510 | /* Try to locate the sections we need for DWARF 2 debugging |
| 2511 | information and return true if we have enough to do something. |
| 2512 | NAMES points to the dwarf2 section names, or is NULL if the standard |
| 2513 | ELF names are used. */ |
| 2514 | |
| 2515 | int |
| 2516 | dwarf2_has_info (struct objfile *objfile, |
| 2517 | const struct dwarf2_debug_sections *names) |
| 2518 | { |
| 2519 | if (objfile->flags & OBJF_READNEVER) |
| 2520 | return 0; |
| 2521 | |
| 2522 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 2523 | = get_dwarf2_per_objfile (objfile); |
| 2524 | |
| 2525 | if (dwarf2_per_objfile == NULL) |
| 2526 | { |
| 2527 | /* Initialize per-objfile state. */ |
| 2528 | struct dwarf2_per_objfile *data |
| 2529 | = XOBNEW (&objfile->objfile_obstack, struct dwarf2_per_objfile); |
| 2530 | |
| 2531 | dwarf2_per_objfile = new (data) struct dwarf2_per_objfile (objfile, names); |
| 2532 | set_dwarf2_per_objfile (objfile, dwarf2_per_objfile); |
| 2533 | } |
| 2534 | return (!dwarf2_per_objfile->info.is_virtual |
| 2535 | && dwarf2_per_objfile->info.s.section != NULL |
| 2536 | && !dwarf2_per_objfile->abbrev.is_virtual |
| 2537 | && dwarf2_per_objfile->abbrev.s.section != NULL); |
| 2538 | } |
| 2539 | |
| 2540 | /* Return the containing section of virtual section SECTION. */ |
| 2541 | |
| 2542 | static struct dwarf2_section_info * |
| 2543 | get_containing_section (const struct dwarf2_section_info *section) |
| 2544 | { |
| 2545 | gdb_assert (section->is_virtual); |
| 2546 | return section->s.containing_section; |
| 2547 | } |
| 2548 | |
| 2549 | /* Return the bfd owner of SECTION. */ |
| 2550 | |
| 2551 | static struct bfd * |
| 2552 | get_section_bfd_owner (const struct dwarf2_section_info *section) |
| 2553 | { |
| 2554 | if (section->is_virtual) |
| 2555 | { |
| 2556 | section = get_containing_section (section); |
| 2557 | gdb_assert (!section->is_virtual); |
| 2558 | } |
| 2559 | return section->s.section->owner; |
| 2560 | } |
| 2561 | |
| 2562 | /* Return the bfd section of SECTION. |
| 2563 | Returns NULL if the section is not present. */ |
| 2564 | |
| 2565 | static asection * |
| 2566 | get_section_bfd_section (const struct dwarf2_section_info *section) |
| 2567 | { |
| 2568 | if (section->is_virtual) |
| 2569 | { |
| 2570 | section = get_containing_section (section); |
| 2571 | gdb_assert (!section->is_virtual); |
| 2572 | } |
| 2573 | return section->s.section; |
| 2574 | } |
| 2575 | |
| 2576 | /* Return the name of SECTION. */ |
| 2577 | |
| 2578 | static const char * |
| 2579 | get_section_name (const struct dwarf2_section_info *section) |
| 2580 | { |
| 2581 | asection *sectp = get_section_bfd_section (section); |
| 2582 | |
| 2583 | gdb_assert (sectp != NULL); |
| 2584 | return bfd_section_name (get_section_bfd_owner (section), sectp); |
| 2585 | } |
| 2586 | |
| 2587 | /* Return the name of the file SECTION is in. */ |
| 2588 | |
| 2589 | static const char * |
| 2590 | get_section_file_name (const struct dwarf2_section_info *section) |
| 2591 | { |
| 2592 | bfd *abfd = get_section_bfd_owner (section); |
| 2593 | |
| 2594 | return bfd_get_filename (abfd); |
| 2595 | } |
| 2596 | |
| 2597 | /* Return the id of SECTION. |
| 2598 | Returns 0 if SECTION doesn't exist. */ |
| 2599 | |
| 2600 | static int |
| 2601 | get_section_id (const struct dwarf2_section_info *section) |
| 2602 | { |
| 2603 | asection *sectp = get_section_bfd_section (section); |
| 2604 | |
| 2605 | if (sectp == NULL) |
| 2606 | return 0; |
| 2607 | return sectp->id; |
| 2608 | } |
| 2609 | |
| 2610 | /* Return the flags of SECTION. |
| 2611 | SECTION (or containing section if this is a virtual section) must exist. */ |
| 2612 | |
| 2613 | static int |
| 2614 | get_section_flags (const struct dwarf2_section_info *section) |
| 2615 | { |
| 2616 | asection *sectp = get_section_bfd_section (section); |
| 2617 | |
| 2618 | gdb_assert (sectp != NULL); |
| 2619 | return bfd_get_section_flags (sectp->owner, sectp); |
| 2620 | } |
| 2621 | |
| 2622 | /* When loading sections, we look either for uncompressed section or for |
| 2623 | compressed section names. */ |
| 2624 | |
| 2625 | static int |
| 2626 | section_is_p (const char *section_name, |
| 2627 | const struct dwarf2_section_names *names) |
| 2628 | { |
| 2629 | if (names->normal != NULL |
| 2630 | && strcmp (section_name, names->normal) == 0) |
| 2631 | return 1; |
| 2632 | if (names->compressed != NULL |
| 2633 | && strcmp (section_name, names->compressed) == 0) |
| 2634 | return 1; |
| 2635 | return 0; |
| 2636 | } |
| 2637 | |
| 2638 | /* See declaration. */ |
| 2639 | |
| 2640 | void |
| 2641 | dwarf2_per_objfile::locate_sections (bfd *abfd, asection *sectp, |
| 2642 | const dwarf2_debug_sections &names) |
| 2643 | { |
| 2644 | flagword aflag = bfd_get_section_flags (abfd, sectp); |
| 2645 | |
| 2646 | if ((aflag & SEC_HAS_CONTENTS) == 0) |
| 2647 | { |
| 2648 | } |
| 2649 | else if (section_is_p (sectp->name, &names.info)) |
| 2650 | { |
| 2651 | this->info.s.section = sectp; |
| 2652 | this->info.size = bfd_get_section_size (sectp); |
| 2653 | } |
| 2654 | else if (section_is_p (sectp->name, &names.abbrev)) |
| 2655 | { |
| 2656 | this->abbrev.s.section = sectp; |
| 2657 | this->abbrev.size = bfd_get_section_size (sectp); |
| 2658 | } |
| 2659 | else if (section_is_p (sectp->name, &names.line)) |
| 2660 | { |
| 2661 | this->line.s.section = sectp; |
| 2662 | this->line.size = bfd_get_section_size (sectp); |
| 2663 | } |
| 2664 | else if (section_is_p (sectp->name, &names.loc)) |
| 2665 | { |
| 2666 | this->loc.s.section = sectp; |
| 2667 | this->loc.size = bfd_get_section_size (sectp); |
| 2668 | } |
| 2669 | else if (section_is_p (sectp->name, &names.loclists)) |
| 2670 | { |
| 2671 | this->loclists.s.section = sectp; |
| 2672 | this->loclists.size = bfd_get_section_size (sectp); |
| 2673 | } |
| 2674 | else if (section_is_p (sectp->name, &names.macinfo)) |
| 2675 | { |
| 2676 | this->macinfo.s.section = sectp; |
| 2677 | this->macinfo.size = bfd_get_section_size (sectp); |
| 2678 | } |
| 2679 | else if (section_is_p (sectp->name, &names.macro)) |
| 2680 | { |
| 2681 | this->macro.s.section = sectp; |
| 2682 | this->macro.size = bfd_get_section_size (sectp); |
| 2683 | } |
| 2684 | else if (section_is_p (sectp->name, &names.str)) |
| 2685 | { |
| 2686 | this->str.s.section = sectp; |
| 2687 | this->str.size = bfd_get_section_size (sectp); |
| 2688 | } |
| 2689 | else if (section_is_p (sectp->name, &names.line_str)) |
| 2690 | { |
| 2691 | this->line_str.s.section = sectp; |
| 2692 | this->line_str.size = bfd_get_section_size (sectp); |
| 2693 | } |
| 2694 | else if (section_is_p (sectp->name, &names.addr)) |
| 2695 | { |
| 2696 | this->addr.s.section = sectp; |
| 2697 | this->addr.size = bfd_get_section_size (sectp); |
| 2698 | } |
| 2699 | else if (section_is_p (sectp->name, &names.frame)) |
| 2700 | { |
| 2701 | this->frame.s.section = sectp; |
| 2702 | this->frame.size = bfd_get_section_size (sectp); |
| 2703 | } |
| 2704 | else if (section_is_p (sectp->name, &names.eh_frame)) |
| 2705 | { |
| 2706 | this->eh_frame.s.section = sectp; |
| 2707 | this->eh_frame.size = bfd_get_section_size (sectp); |
| 2708 | } |
| 2709 | else if (section_is_p (sectp->name, &names.ranges)) |
| 2710 | { |
| 2711 | this->ranges.s.section = sectp; |
| 2712 | this->ranges.size = bfd_get_section_size (sectp); |
| 2713 | } |
| 2714 | else if (section_is_p (sectp->name, &names.rnglists)) |
| 2715 | { |
| 2716 | this->rnglists.s.section = sectp; |
| 2717 | this->rnglists.size = bfd_get_section_size (sectp); |
| 2718 | } |
| 2719 | else if (section_is_p (sectp->name, &names.types)) |
| 2720 | { |
| 2721 | struct dwarf2_section_info type_section; |
| 2722 | |
| 2723 | memset (&type_section, 0, sizeof (type_section)); |
| 2724 | type_section.s.section = sectp; |
| 2725 | type_section.size = bfd_get_section_size (sectp); |
| 2726 | |
| 2727 | VEC_safe_push (dwarf2_section_info_def, this->types, |
| 2728 | &type_section); |
| 2729 | } |
| 2730 | else if (section_is_p (sectp->name, &names.gdb_index)) |
| 2731 | { |
| 2732 | this->gdb_index.s.section = sectp; |
| 2733 | this->gdb_index.size = bfd_get_section_size (sectp); |
| 2734 | } |
| 2735 | else if (section_is_p (sectp->name, &names.debug_names)) |
| 2736 | { |
| 2737 | this->debug_names.s.section = sectp; |
| 2738 | this->debug_names.size = bfd_get_section_size (sectp); |
| 2739 | } |
| 2740 | else if (section_is_p (sectp->name, &names.debug_aranges)) |
| 2741 | { |
| 2742 | this->debug_aranges.s.section = sectp; |
| 2743 | this->debug_aranges.size = bfd_get_section_size (sectp); |
| 2744 | } |
| 2745 | |
| 2746 | if ((bfd_get_section_flags (abfd, sectp) & (SEC_LOAD | SEC_ALLOC)) |
| 2747 | && bfd_section_vma (abfd, sectp) == 0) |
| 2748 | this->has_section_at_zero = true; |
| 2749 | } |
| 2750 | |
| 2751 | /* A helper function that decides whether a section is empty, |
| 2752 | or not present. */ |
| 2753 | |
| 2754 | static int |
| 2755 | dwarf2_section_empty_p (const struct dwarf2_section_info *section) |
| 2756 | { |
| 2757 | if (section->is_virtual) |
| 2758 | return section->size == 0; |
| 2759 | return section->s.section == NULL || section->size == 0; |
| 2760 | } |
| 2761 | |
| 2762 | /* Read the contents of the section INFO. |
| 2763 | OBJFILE is the main object file, but not necessarily the file where |
| 2764 | the section comes from. E.g., for DWO files the bfd of INFO is the bfd |
| 2765 | of the DWO file. |
| 2766 | If the section is compressed, uncompress it before returning. */ |
| 2767 | |
| 2768 | static void |
| 2769 | dwarf2_read_section (struct objfile *objfile, struct dwarf2_section_info *info) |
| 2770 | { |
| 2771 | asection *sectp; |
| 2772 | bfd *abfd; |
| 2773 | gdb_byte *buf, *retbuf; |
| 2774 | |
| 2775 | if (info->readin) |
| 2776 | return; |
| 2777 | info->buffer = NULL; |
| 2778 | info->readin = 1; |
| 2779 | |
| 2780 | if (dwarf2_section_empty_p (info)) |
| 2781 | return; |
| 2782 | |
| 2783 | sectp = get_section_bfd_section (info); |
| 2784 | |
| 2785 | /* If this is a virtual section we need to read in the real one first. */ |
| 2786 | if (info->is_virtual) |
| 2787 | { |
| 2788 | struct dwarf2_section_info *containing_section = |
| 2789 | get_containing_section (info); |
| 2790 | |
| 2791 | gdb_assert (sectp != NULL); |
| 2792 | if ((sectp->flags & SEC_RELOC) != 0) |
| 2793 | { |
| 2794 | error (_("Dwarf Error: DWP format V2 with relocations is not" |
| 2795 | " supported in section %s [in module %s]"), |
| 2796 | get_section_name (info), get_section_file_name (info)); |
| 2797 | } |
| 2798 | dwarf2_read_section (objfile, containing_section); |
| 2799 | /* Other code should have already caught virtual sections that don't |
| 2800 | fit. */ |
| 2801 | gdb_assert (info->virtual_offset + info->size |
| 2802 | <= containing_section->size); |
| 2803 | /* If the real section is empty or there was a problem reading the |
| 2804 | section we shouldn't get here. */ |
| 2805 | gdb_assert (containing_section->buffer != NULL); |
| 2806 | info->buffer = containing_section->buffer + info->virtual_offset; |
| 2807 | return; |
| 2808 | } |
| 2809 | |
| 2810 | /* If the section has relocations, we must read it ourselves. |
| 2811 | Otherwise we attach it to the BFD. */ |
| 2812 | if ((sectp->flags & SEC_RELOC) == 0) |
| 2813 | { |
| 2814 | info->buffer = gdb_bfd_map_section (sectp, &info->size); |
| 2815 | return; |
| 2816 | } |
| 2817 | |
| 2818 | buf = (gdb_byte *) obstack_alloc (&objfile->objfile_obstack, info->size); |
| 2819 | info->buffer = buf; |
| 2820 | |
| 2821 | /* When debugging .o files, we may need to apply relocations; see |
| 2822 | http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html . |
| 2823 | We never compress sections in .o files, so we only need to |
| 2824 | try this when the section is not compressed. */ |
| 2825 | retbuf = symfile_relocate_debug_section (objfile, sectp, buf); |
| 2826 | if (retbuf != NULL) |
| 2827 | { |
| 2828 | info->buffer = retbuf; |
| 2829 | return; |
| 2830 | } |
| 2831 | |
| 2832 | abfd = get_section_bfd_owner (info); |
| 2833 | gdb_assert (abfd != NULL); |
| 2834 | |
| 2835 | if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0 |
| 2836 | || bfd_bread (buf, info->size, abfd) != info->size) |
| 2837 | { |
| 2838 | error (_("Dwarf Error: Can't read DWARF data" |
| 2839 | " in section %s [in module %s]"), |
| 2840 | bfd_section_name (abfd, sectp), bfd_get_filename (abfd)); |
| 2841 | } |
| 2842 | } |
| 2843 | |
| 2844 | /* A helper function that returns the size of a section in a safe way. |
| 2845 | If you are positive that the section has been read before using the |
| 2846 | size, then it is safe to refer to the dwarf2_section_info object's |
| 2847 | "size" field directly. In other cases, you must call this |
| 2848 | function, because for compressed sections the size field is not set |
| 2849 | correctly until the section has been read. */ |
| 2850 | |
| 2851 | static bfd_size_type |
| 2852 | dwarf2_section_size (struct objfile *objfile, |
| 2853 | struct dwarf2_section_info *info) |
| 2854 | { |
| 2855 | if (!info->readin) |
| 2856 | dwarf2_read_section (objfile, info); |
| 2857 | return info->size; |
| 2858 | } |
| 2859 | |
| 2860 | /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and |
| 2861 | SECTION_NAME. */ |
| 2862 | |
| 2863 | void |
| 2864 | dwarf2_get_section_info (struct objfile *objfile, |
| 2865 | enum dwarf2_section_enum sect, |
| 2866 | asection **sectp, const gdb_byte **bufp, |
| 2867 | bfd_size_type *sizep) |
| 2868 | { |
| 2869 | struct dwarf2_per_objfile *data |
| 2870 | = (struct dwarf2_per_objfile *) objfile_data (objfile, |
| 2871 | dwarf2_objfile_data_key); |
| 2872 | struct dwarf2_section_info *info; |
| 2873 | |
| 2874 | /* We may see an objfile without any DWARF, in which case we just |
| 2875 | return nothing. */ |
| 2876 | if (data == NULL) |
| 2877 | { |
| 2878 | *sectp = NULL; |
| 2879 | *bufp = NULL; |
| 2880 | *sizep = 0; |
| 2881 | return; |
| 2882 | } |
| 2883 | switch (sect) |
| 2884 | { |
| 2885 | case DWARF2_DEBUG_FRAME: |
| 2886 | info = &data->frame; |
| 2887 | break; |
| 2888 | case DWARF2_EH_FRAME: |
| 2889 | info = &data->eh_frame; |
| 2890 | break; |
| 2891 | default: |
| 2892 | gdb_assert_not_reached ("unexpected section"); |
| 2893 | } |
| 2894 | |
| 2895 | dwarf2_read_section (objfile, info); |
| 2896 | |
| 2897 | *sectp = get_section_bfd_section (info); |
| 2898 | *bufp = info->buffer; |
| 2899 | *sizep = info->size; |
| 2900 | } |
| 2901 | |
| 2902 | /* A helper function to find the sections for a .dwz file. */ |
| 2903 | |
| 2904 | static void |
| 2905 | locate_dwz_sections (bfd *abfd, asection *sectp, void *arg) |
| 2906 | { |
| 2907 | struct dwz_file *dwz_file = (struct dwz_file *) arg; |
| 2908 | |
| 2909 | /* Note that we only support the standard ELF names, because .dwz |
| 2910 | is ELF-only (at the time of writing). */ |
| 2911 | if (section_is_p (sectp->name, &dwarf2_elf_names.abbrev)) |
| 2912 | { |
| 2913 | dwz_file->abbrev.s.section = sectp; |
| 2914 | dwz_file->abbrev.size = bfd_get_section_size (sectp); |
| 2915 | } |
| 2916 | else if (section_is_p (sectp->name, &dwarf2_elf_names.info)) |
| 2917 | { |
| 2918 | dwz_file->info.s.section = sectp; |
| 2919 | dwz_file->info.size = bfd_get_section_size (sectp); |
| 2920 | } |
| 2921 | else if (section_is_p (sectp->name, &dwarf2_elf_names.str)) |
| 2922 | { |
| 2923 | dwz_file->str.s.section = sectp; |
| 2924 | dwz_file->str.size = bfd_get_section_size (sectp); |
| 2925 | } |
| 2926 | else if (section_is_p (sectp->name, &dwarf2_elf_names.line)) |
| 2927 | { |
| 2928 | dwz_file->line.s.section = sectp; |
| 2929 | dwz_file->line.size = bfd_get_section_size (sectp); |
| 2930 | } |
| 2931 | else if (section_is_p (sectp->name, &dwarf2_elf_names.macro)) |
| 2932 | { |
| 2933 | dwz_file->macro.s.section = sectp; |
| 2934 | dwz_file->macro.size = bfd_get_section_size (sectp); |
| 2935 | } |
| 2936 | else if (section_is_p (sectp->name, &dwarf2_elf_names.gdb_index)) |
| 2937 | { |
| 2938 | dwz_file->gdb_index.s.section = sectp; |
| 2939 | dwz_file->gdb_index.size = bfd_get_section_size (sectp); |
| 2940 | } |
| 2941 | else if (section_is_p (sectp->name, &dwarf2_elf_names.debug_names)) |
| 2942 | { |
| 2943 | dwz_file->debug_names.s.section = sectp; |
| 2944 | dwz_file->debug_names.size = bfd_get_section_size (sectp); |
| 2945 | } |
| 2946 | } |
| 2947 | |
| 2948 | /* Open the separate '.dwz' debug file, if needed. Return NULL if |
| 2949 | there is no .gnu_debugaltlink section in the file. Error if there |
| 2950 | is such a section but the file cannot be found. */ |
| 2951 | |
| 2952 | static struct dwz_file * |
| 2953 | dwarf2_get_dwz_file (struct dwarf2_per_objfile *dwarf2_per_objfile) |
| 2954 | { |
| 2955 | const char *filename; |
| 2956 | struct dwz_file *result; |
| 2957 | bfd_size_type buildid_len_arg; |
| 2958 | size_t buildid_len; |
| 2959 | bfd_byte *buildid; |
| 2960 | |
| 2961 | if (dwarf2_per_objfile->dwz_file != NULL) |
| 2962 | return dwarf2_per_objfile->dwz_file; |
| 2963 | |
| 2964 | bfd_set_error (bfd_error_no_error); |
| 2965 | gdb::unique_xmalloc_ptr<char> data |
| 2966 | (bfd_get_alt_debug_link_info (dwarf2_per_objfile->objfile->obfd, |
| 2967 | &buildid_len_arg, &buildid)); |
| 2968 | if (data == NULL) |
| 2969 | { |
| 2970 | if (bfd_get_error () == bfd_error_no_error) |
| 2971 | return NULL; |
| 2972 | error (_("could not read '.gnu_debugaltlink' section: %s"), |
| 2973 | bfd_errmsg (bfd_get_error ())); |
| 2974 | } |
| 2975 | |
| 2976 | gdb::unique_xmalloc_ptr<bfd_byte> buildid_holder (buildid); |
| 2977 | |
| 2978 | buildid_len = (size_t) buildid_len_arg; |
| 2979 | |
| 2980 | filename = data.get (); |
| 2981 | |
| 2982 | std::string abs_storage; |
| 2983 | if (!IS_ABSOLUTE_PATH (filename)) |
| 2984 | { |
| 2985 | gdb::unique_xmalloc_ptr<char> abs |
| 2986 | = gdb_realpath (objfile_name (dwarf2_per_objfile->objfile)); |
| 2987 | |
| 2988 | abs_storage = ldirname (abs.get ()) + SLASH_STRING + filename; |
| 2989 | filename = abs_storage.c_str (); |
| 2990 | } |
| 2991 | |
| 2992 | /* First try the file name given in the section. If that doesn't |
| 2993 | work, try to use the build-id instead. */ |
| 2994 | gdb_bfd_ref_ptr dwz_bfd (gdb_bfd_open (filename, gnutarget, -1)); |
| 2995 | if (dwz_bfd != NULL) |
| 2996 | { |
| 2997 | if (!build_id_verify (dwz_bfd.get (), buildid_len, buildid)) |
| 2998 | dwz_bfd.release (); |
| 2999 | } |
| 3000 | |
| 3001 | if (dwz_bfd == NULL) |
| 3002 | dwz_bfd = build_id_to_debug_bfd (buildid_len, buildid); |
| 3003 | |
| 3004 | if (dwz_bfd == NULL) |
| 3005 | error (_("could not find '.gnu_debugaltlink' file for %s"), |
| 3006 | objfile_name (dwarf2_per_objfile->objfile)); |
| 3007 | |
| 3008 | result = OBSTACK_ZALLOC (&dwarf2_per_objfile->objfile->objfile_obstack, |
| 3009 | struct dwz_file); |
| 3010 | result->dwz_bfd = dwz_bfd.release (); |
| 3011 | |
| 3012 | bfd_map_over_sections (result->dwz_bfd, locate_dwz_sections, result); |
| 3013 | |
| 3014 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, result->dwz_bfd); |
| 3015 | dwarf2_per_objfile->dwz_file = result; |
| 3016 | return result; |
| 3017 | } |
| 3018 | \f |
| 3019 | /* DWARF quick_symbols_functions support. */ |
| 3020 | |
| 3021 | /* TUs can share .debug_line entries, and there can be a lot more TUs than |
| 3022 | unique line tables, so we maintain a separate table of all .debug_line |
| 3023 | derived entries to support the sharing. |
| 3024 | All the quick functions need is the list of file names. We discard the |
| 3025 | line_header when we're done and don't need to record it here. */ |
| 3026 | struct quick_file_names |
| 3027 | { |
| 3028 | /* The data used to construct the hash key. */ |
| 3029 | struct stmt_list_hash hash; |
| 3030 | |
| 3031 | /* The number of entries in file_names, real_names. */ |
| 3032 | unsigned int num_file_names; |
| 3033 | |
| 3034 | /* The file names from the line table, after being run through |
| 3035 | file_full_name. */ |
| 3036 | const char **file_names; |
| 3037 | |
| 3038 | /* The file names from the line table after being run through |
| 3039 | gdb_realpath. These are computed lazily. */ |
| 3040 | const char **real_names; |
| 3041 | }; |
| 3042 | |
| 3043 | /* When using the index (and thus not using psymtabs), each CU has an |
| 3044 | object of this type. This is used to hold information needed by |
| 3045 | the various "quick" methods. */ |
| 3046 | struct dwarf2_per_cu_quick_data |
| 3047 | { |
| 3048 | /* The file table. This can be NULL if there was no file table |
| 3049 | or it's currently not read in. |
| 3050 | NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */ |
| 3051 | struct quick_file_names *file_names; |
| 3052 | |
| 3053 | /* The corresponding symbol table. This is NULL if symbols for this |
| 3054 | CU have not yet been read. */ |
| 3055 | struct compunit_symtab *compunit_symtab; |
| 3056 | |
| 3057 | /* A temporary mark bit used when iterating over all CUs in |
| 3058 | expand_symtabs_matching. */ |
| 3059 | unsigned int mark : 1; |
| 3060 | |
| 3061 | /* True if we've tried to read the file table and found there isn't one. |
| 3062 | There will be no point in trying to read it again next time. */ |
| 3063 | unsigned int no_file_data : 1; |
| 3064 | }; |
| 3065 | |
| 3066 | /* Utility hash function for a stmt_list_hash. */ |
| 3067 | |
| 3068 | static hashval_t |
| 3069 | hash_stmt_list_entry (const struct stmt_list_hash *stmt_list_hash) |
| 3070 | { |
| 3071 | hashval_t v = 0; |
| 3072 | |
| 3073 | if (stmt_list_hash->dwo_unit != NULL) |
| 3074 | v += (uintptr_t) stmt_list_hash->dwo_unit->dwo_file; |
| 3075 | v += to_underlying (stmt_list_hash->line_sect_off); |
| 3076 | return v; |
| 3077 | } |
| 3078 | |
| 3079 | /* Utility equality function for a stmt_list_hash. */ |
| 3080 | |
| 3081 | static int |
| 3082 | eq_stmt_list_entry (const struct stmt_list_hash *lhs, |
| 3083 | const struct stmt_list_hash *rhs) |
| 3084 | { |
| 3085 | if ((lhs->dwo_unit != NULL) != (rhs->dwo_unit != NULL)) |
| 3086 | return 0; |
| 3087 | if (lhs->dwo_unit != NULL |
| 3088 | && lhs->dwo_unit->dwo_file != rhs->dwo_unit->dwo_file) |
| 3089 | return 0; |
| 3090 | |
| 3091 | return lhs->line_sect_off == rhs->line_sect_off; |
| 3092 | } |
| 3093 | |
| 3094 | /* Hash function for a quick_file_names. */ |
| 3095 | |
| 3096 | static hashval_t |
| 3097 | hash_file_name_entry (const void *e) |
| 3098 | { |
| 3099 | const struct quick_file_names *file_data |
| 3100 | = (const struct quick_file_names *) e; |
| 3101 | |
| 3102 | return hash_stmt_list_entry (&file_data->hash); |
| 3103 | } |
| 3104 | |
| 3105 | /* Equality function for a quick_file_names. */ |
| 3106 | |
| 3107 | static int |
| 3108 | eq_file_name_entry (const void *a, const void *b) |
| 3109 | { |
| 3110 | const struct quick_file_names *ea = (const struct quick_file_names *) a; |
| 3111 | const struct quick_file_names *eb = (const struct quick_file_names *) b; |
| 3112 | |
| 3113 | return eq_stmt_list_entry (&ea->hash, &eb->hash); |
| 3114 | } |
| 3115 | |
| 3116 | /* Delete function for a quick_file_names. */ |
| 3117 | |
| 3118 | static void |
| 3119 | delete_file_name_entry (void *e) |
| 3120 | { |
| 3121 | struct quick_file_names *file_data = (struct quick_file_names *) e; |
| 3122 | int i; |
| 3123 | |
| 3124 | for (i = 0; i < file_data->num_file_names; ++i) |
| 3125 | { |
| 3126 | xfree ((void*) file_data->file_names[i]); |
| 3127 | if (file_data->real_names) |
| 3128 | xfree ((void*) file_data->real_names[i]); |
| 3129 | } |
| 3130 | |
| 3131 | /* The space for the struct itself lives on objfile_obstack, |
| 3132 | so we don't free it here. */ |
| 3133 | } |
| 3134 | |
| 3135 | /* Create a quick_file_names hash table. */ |
| 3136 | |
| 3137 | static htab_t |
| 3138 | create_quick_file_names_table (unsigned int nr_initial_entries) |
| 3139 | { |
| 3140 | return htab_create_alloc (nr_initial_entries, |
| 3141 | hash_file_name_entry, eq_file_name_entry, |
| 3142 | delete_file_name_entry, xcalloc, xfree); |
| 3143 | } |
| 3144 | |
| 3145 | /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would |
| 3146 | have to be created afterwards. You should call age_cached_comp_units after |
| 3147 | processing PER_CU->CU. dw2_setup must have been already called. */ |
| 3148 | |
| 3149 | static void |
| 3150 | load_cu (struct dwarf2_per_cu_data *per_cu) |
| 3151 | { |
| 3152 | if (per_cu->is_debug_types) |
| 3153 | load_full_type_unit (per_cu); |
| 3154 | else |
| 3155 | load_full_comp_unit (per_cu, language_minimal); |
| 3156 | |
| 3157 | if (per_cu->cu == NULL) |
| 3158 | return; /* Dummy CU. */ |
| 3159 | |
| 3160 | dwarf2_find_base_address (per_cu->cu->dies, per_cu->cu); |
| 3161 | } |
| 3162 | |
| 3163 | /* Read in the symbols for PER_CU. */ |
| 3164 | |
| 3165 | static void |
| 3166 | dw2_do_instantiate_symtab (struct dwarf2_per_cu_data *per_cu) |
| 3167 | { |
| 3168 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
| 3169 | |
| 3170 | /* Skip type_unit_groups, reading the type units they contain |
| 3171 | is handled elsewhere. */ |
| 3172 | if (IS_TYPE_UNIT_GROUP (per_cu)) |
| 3173 | return; |
| 3174 | |
| 3175 | /* The destructor of dwarf2_queue_guard frees any entries left on |
| 3176 | the queue. After this point we're guaranteed to leave this function |
| 3177 | with the dwarf queue empty. */ |
| 3178 | dwarf2_queue_guard q_guard; |
| 3179 | |
| 3180 | if (dwarf2_per_objfile->using_index |
| 3181 | ? per_cu->v.quick->compunit_symtab == NULL |
| 3182 | : (per_cu->v.psymtab == NULL || !per_cu->v.psymtab->readin)) |
| 3183 | { |
| 3184 | queue_comp_unit (per_cu, language_minimal); |
| 3185 | load_cu (per_cu); |
| 3186 | |
| 3187 | /* If we just loaded a CU from a DWO, and we're working with an index |
| 3188 | that may badly handle TUs, load all the TUs in that DWO as well. |
| 3189 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ |
| 3190 | if (!per_cu->is_debug_types |
| 3191 | && per_cu->cu != NULL |
| 3192 | && per_cu->cu->dwo_unit != NULL |
| 3193 | && dwarf2_per_objfile->index_table != NULL |
| 3194 | && dwarf2_per_objfile->index_table->version <= 7 |
| 3195 | /* DWP files aren't supported yet. */ |
| 3196 | && get_dwp_file (dwarf2_per_objfile) == NULL) |
| 3197 | queue_and_load_all_dwo_tus (per_cu); |
| 3198 | } |
| 3199 | |
| 3200 | process_queue (dwarf2_per_objfile); |
| 3201 | |
| 3202 | /* Age the cache, releasing compilation units that have not |
| 3203 | been used recently. */ |
| 3204 | age_cached_comp_units (dwarf2_per_objfile); |
| 3205 | } |
| 3206 | |
| 3207 | /* Ensure that the symbols for PER_CU have been read in. OBJFILE is |
| 3208 | the objfile from which this CU came. Returns the resulting symbol |
| 3209 | table. */ |
| 3210 | |
| 3211 | static struct compunit_symtab * |
| 3212 | dw2_instantiate_symtab (struct dwarf2_per_cu_data *per_cu) |
| 3213 | { |
| 3214 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
| 3215 | |
| 3216 | gdb_assert (dwarf2_per_objfile->using_index); |
| 3217 | if (!per_cu->v.quick->compunit_symtab) |
| 3218 | { |
| 3219 | struct cleanup *back_to = make_cleanup (free_cached_comp_units, |
| 3220 | dwarf2_per_objfile); |
| 3221 | scoped_restore decrementer = increment_reading_symtab (); |
| 3222 | dw2_do_instantiate_symtab (per_cu); |
| 3223 | process_cu_includes (dwarf2_per_objfile); |
| 3224 | do_cleanups (back_to); |
| 3225 | } |
| 3226 | |
| 3227 | return per_cu->v.quick->compunit_symtab; |
| 3228 | } |
| 3229 | |
| 3230 | /* Return the CU/TU given its index. |
| 3231 | |
| 3232 | This is intended for loops like: |
| 3233 | |
| 3234 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units |
| 3235 | + dwarf2_per_objfile->n_type_units); ++i) |
| 3236 | { |
| 3237 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
| 3238 | |
| 3239 | ...; |
| 3240 | } |
| 3241 | */ |
| 3242 | |
| 3243 | static struct dwarf2_per_cu_data * |
| 3244 | dw2_get_cutu (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 3245 | int index) |
| 3246 | { |
| 3247 | if (index >= dwarf2_per_objfile->n_comp_units) |
| 3248 | { |
| 3249 | index -= dwarf2_per_objfile->n_comp_units; |
| 3250 | gdb_assert (index < dwarf2_per_objfile->n_type_units); |
| 3251 | return &dwarf2_per_objfile->all_type_units[index]->per_cu; |
| 3252 | } |
| 3253 | |
| 3254 | return dwarf2_per_objfile->all_comp_units[index]; |
| 3255 | } |
| 3256 | |
| 3257 | /* Return the CU given its index. |
| 3258 | This differs from dw2_get_cutu in that it's for when you know INDEX |
| 3259 | refers to a CU. */ |
| 3260 | |
| 3261 | static struct dwarf2_per_cu_data * |
| 3262 | dw2_get_cu (struct dwarf2_per_objfile *dwarf2_per_objfile, int index) |
| 3263 | { |
| 3264 | gdb_assert (index >= 0 && index < dwarf2_per_objfile->n_comp_units); |
| 3265 | |
| 3266 | return dwarf2_per_objfile->all_comp_units[index]; |
| 3267 | } |
| 3268 | |
| 3269 | /* Return a new dwarf2_per_cu_data allocated on OBJFILE's |
| 3270 | objfile_obstack, and constructed with the specified field |
| 3271 | values. */ |
| 3272 | |
| 3273 | static dwarf2_per_cu_data * |
| 3274 | create_cu_from_index_list (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 3275 | struct dwarf2_section_info *section, |
| 3276 | int is_dwz, |
| 3277 | sect_offset sect_off, ULONGEST length) |
| 3278 | { |
| 3279 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 3280 | dwarf2_per_cu_data *the_cu |
| 3281 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
| 3282 | struct dwarf2_per_cu_data); |
| 3283 | the_cu->sect_off = sect_off; |
| 3284 | the_cu->length = length; |
| 3285 | the_cu->dwarf2_per_objfile = dwarf2_per_objfile; |
| 3286 | the_cu->section = section; |
| 3287 | the_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
| 3288 | struct dwarf2_per_cu_quick_data); |
| 3289 | the_cu->is_dwz = is_dwz; |
| 3290 | return the_cu; |
| 3291 | } |
| 3292 | |
| 3293 | /* A helper for create_cus_from_index that handles a given list of |
| 3294 | CUs. */ |
| 3295 | |
| 3296 | static void |
| 3297 | create_cus_from_index_list (struct objfile *objfile, |
| 3298 | const gdb_byte *cu_list, offset_type n_elements, |
| 3299 | struct dwarf2_section_info *section, |
| 3300 | int is_dwz, |
| 3301 | int base_offset) |
| 3302 | { |
| 3303 | offset_type i; |
| 3304 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 3305 | = get_dwarf2_per_objfile (objfile); |
| 3306 | |
| 3307 | for (i = 0; i < n_elements; i += 2) |
| 3308 | { |
| 3309 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
| 3310 | |
| 3311 | sect_offset sect_off |
| 3312 | = (sect_offset) extract_unsigned_integer (cu_list, 8, BFD_ENDIAN_LITTLE); |
| 3313 | ULONGEST length = extract_unsigned_integer (cu_list + 8, 8, BFD_ENDIAN_LITTLE); |
| 3314 | cu_list += 2 * 8; |
| 3315 | |
| 3316 | dwarf2_per_objfile->all_comp_units[base_offset + i / 2] |
| 3317 | = create_cu_from_index_list (dwarf2_per_objfile, section, is_dwz, |
| 3318 | sect_off, length); |
| 3319 | } |
| 3320 | } |
| 3321 | |
| 3322 | /* Read the CU list from the mapped index, and use it to create all |
| 3323 | the CU objects for this objfile. */ |
| 3324 | |
| 3325 | static void |
| 3326 | create_cus_from_index (struct objfile *objfile, |
| 3327 | const gdb_byte *cu_list, offset_type cu_list_elements, |
| 3328 | const gdb_byte *dwz_list, offset_type dwz_elements) |
| 3329 | { |
| 3330 | struct dwz_file *dwz; |
| 3331 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 3332 | = get_dwarf2_per_objfile (objfile); |
| 3333 | |
| 3334 | dwarf2_per_objfile->n_comp_units = (cu_list_elements + dwz_elements) / 2; |
| 3335 | dwarf2_per_objfile->all_comp_units = |
| 3336 | XOBNEWVEC (&objfile->objfile_obstack, struct dwarf2_per_cu_data *, |
| 3337 | dwarf2_per_objfile->n_comp_units); |
| 3338 | |
| 3339 | create_cus_from_index_list (objfile, cu_list, cu_list_elements, |
| 3340 | &dwarf2_per_objfile->info, 0, 0); |
| 3341 | |
| 3342 | if (dwz_elements == 0) |
| 3343 | return; |
| 3344 | |
| 3345 | dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
| 3346 | create_cus_from_index_list (objfile, dwz_list, dwz_elements, &dwz->info, 1, |
| 3347 | cu_list_elements / 2); |
| 3348 | } |
| 3349 | |
| 3350 | /* Create the signatured type hash table from the index. */ |
| 3351 | |
| 3352 | static void |
| 3353 | create_signatured_type_table_from_index (struct objfile *objfile, |
| 3354 | struct dwarf2_section_info *section, |
| 3355 | const gdb_byte *bytes, |
| 3356 | offset_type elements) |
| 3357 | { |
| 3358 | offset_type i; |
| 3359 | htab_t sig_types_hash; |
| 3360 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 3361 | = get_dwarf2_per_objfile (objfile); |
| 3362 | |
| 3363 | dwarf2_per_objfile->n_type_units |
| 3364 | = dwarf2_per_objfile->n_allocated_type_units |
| 3365 | = elements / 3; |
| 3366 | dwarf2_per_objfile->all_type_units = |
| 3367 | XNEWVEC (struct signatured_type *, dwarf2_per_objfile->n_type_units); |
| 3368 | |
| 3369 | sig_types_hash = allocate_signatured_type_table (objfile); |
| 3370 | |
| 3371 | for (i = 0; i < elements; i += 3) |
| 3372 | { |
| 3373 | struct signatured_type *sig_type; |
| 3374 | ULONGEST signature; |
| 3375 | void **slot; |
| 3376 | cu_offset type_offset_in_tu; |
| 3377 | |
| 3378 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
| 3379 | sect_offset sect_off |
| 3380 | = (sect_offset) extract_unsigned_integer (bytes, 8, BFD_ENDIAN_LITTLE); |
| 3381 | type_offset_in_tu |
| 3382 | = (cu_offset) extract_unsigned_integer (bytes + 8, 8, |
| 3383 | BFD_ENDIAN_LITTLE); |
| 3384 | signature = extract_unsigned_integer (bytes + 16, 8, BFD_ENDIAN_LITTLE); |
| 3385 | bytes += 3 * 8; |
| 3386 | |
| 3387 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
| 3388 | struct signatured_type); |
| 3389 | sig_type->signature = signature; |
| 3390 | sig_type->type_offset_in_tu = type_offset_in_tu; |
| 3391 | sig_type->per_cu.is_debug_types = 1; |
| 3392 | sig_type->per_cu.section = section; |
| 3393 | sig_type->per_cu.sect_off = sect_off; |
| 3394 | sig_type->per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
| 3395 | sig_type->per_cu.v.quick |
| 3396 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
| 3397 | struct dwarf2_per_cu_quick_data); |
| 3398 | |
| 3399 | slot = htab_find_slot (sig_types_hash, sig_type, INSERT); |
| 3400 | *slot = sig_type; |
| 3401 | |
| 3402 | dwarf2_per_objfile->all_type_units[i / 3] = sig_type; |
| 3403 | } |
| 3404 | |
| 3405 | dwarf2_per_objfile->signatured_types = sig_types_hash; |
| 3406 | } |
| 3407 | |
| 3408 | /* Create the signatured type hash table from .debug_names. */ |
| 3409 | |
| 3410 | static void |
| 3411 | create_signatured_type_table_from_debug_names |
| 3412 | (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 3413 | const mapped_debug_names &map, |
| 3414 | struct dwarf2_section_info *section, |
| 3415 | struct dwarf2_section_info *abbrev_section) |
| 3416 | { |
| 3417 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 3418 | |
| 3419 | dwarf2_read_section (objfile, section); |
| 3420 | dwarf2_read_section (objfile, abbrev_section); |
| 3421 | |
| 3422 | dwarf2_per_objfile->n_type_units |
| 3423 | = dwarf2_per_objfile->n_allocated_type_units |
| 3424 | = map.tu_count; |
| 3425 | dwarf2_per_objfile->all_type_units |
| 3426 | = XNEWVEC (struct signatured_type *, dwarf2_per_objfile->n_type_units); |
| 3427 | |
| 3428 | htab_t sig_types_hash = allocate_signatured_type_table (objfile); |
| 3429 | |
| 3430 | for (uint32_t i = 0; i < map.tu_count; ++i) |
| 3431 | { |
| 3432 | struct signatured_type *sig_type; |
| 3433 | ULONGEST signature; |
| 3434 | void **slot; |
| 3435 | cu_offset type_offset_in_tu; |
| 3436 | |
| 3437 | sect_offset sect_off |
| 3438 | = (sect_offset) (extract_unsigned_integer |
| 3439 | (map.tu_table_reordered + i * map.offset_size, |
| 3440 | map.offset_size, |
| 3441 | map.dwarf5_byte_order)); |
| 3442 | |
| 3443 | comp_unit_head cu_header; |
| 3444 | read_and_check_comp_unit_head (dwarf2_per_objfile, &cu_header, section, |
| 3445 | abbrev_section, |
| 3446 | section->buffer + to_underlying (sect_off), |
| 3447 | rcuh_kind::TYPE); |
| 3448 | |
| 3449 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
| 3450 | struct signatured_type); |
| 3451 | sig_type->signature = cu_header.signature; |
| 3452 | sig_type->type_offset_in_tu = cu_header.type_cu_offset_in_tu; |
| 3453 | sig_type->per_cu.is_debug_types = 1; |
| 3454 | sig_type->per_cu.section = section; |
| 3455 | sig_type->per_cu.sect_off = sect_off; |
| 3456 | sig_type->per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
| 3457 | sig_type->per_cu.v.quick |
| 3458 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
| 3459 | struct dwarf2_per_cu_quick_data); |
| 3460 | |
| 3461 | slot = htab_find_slot (sig_types_hash, sig_type, INSERT); |
| 3462 | *slot = sig_type; |
| 3463 | |
| 3464 | dwarf2_per_objfile->all_type_units[i] = sig_type; |
| 3465 | } |
| 3466 | |
| 3467 | dwarf2_per_objfile->signatured_types = sig_types_hash; |
| 3468 | } |
| 3469 | |
| 3470 | /* Read the address map data from the mapped index, and use it to |
| 3471 | populate the objfile's psymtabs_addrmap. */ |
| 3472 | |
| 3473 | static void |
| 3474 | create_addrmap_from_index (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 3475 | struct mapped_index *index) |
| 3476 | { |
| 3477 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 3478 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
| 3479 | const gdb_byte *iter, *end; |
| 3480 | struct addrmap *mutable_map; |
| 3481 | CORE_ADDR baseaddr; |
| 3482 | |
| 3483 | auto_obstack temp_obstack; |
| 3484 | |
| 3485 | mutable_map = addrmap_create_mutable (&temp_obstack); |
| 3486 | |
| 3487 | iter = index->address_table.data (); |
| 3488 | end = iter + index->address_table.size (); |
| 3489 | |
| 3490 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
| 3491 | |
| 3492 | while (iter < end) |
| 3493 | { |
| 3494 | ULONGEST hi, lo, cu_index; |
| 3495 | lo = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); |
| 3496 | iter += 8; |
| 3497 | hi = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); |
| 3498 | iter += 8; |
| 3499 | cu_index = extract_unsigned_integer (iter, 4, BFD_ENDIAN_LITTLE); |
| 3500 | iter += 4; |
| 3501 | |
| 3502 | if (lo > hi) |
| 3503 | { |
| 3504 | complaint (&symfile_complaints, |
| 3505 | _(".gdb_index address table has invalid range (%s - %s)"), |
| 3506 | hex_string (lo), hex_string (hi)); |
| 3507 | continue; |
| 3508 | } |
| 3509 | |
| 3510 | if (cu_index >= dwarf2_per_objfile->n_comp_units) |
| 3511 | { |
| 3512 | complaint (&symfile_complaints, |
| 3513 | _(".gdb_index address table has invalid CU number %u"), |
| 3514 | (unsigned) cu_index); |
| 3515 | continue; |
| 3516 | } |
| 3517 | |
| 3518 | lo = gdbarch_adjust_dwarf2_addr (gdbarch, lo + baseaddr); |
| 3519 | hi = gdbarch_adjust_dwarf2_addr (gdbarch, hi + baseaddr); |
| 3520 | addrmap_set_empty (mutable_map, lo, hi - 1, |
| 3521 | dw2_get_cutu (dwarf2_per_objfile, cu_index)); |
| 3522 | } |
| 3523 | |
| 3524 | objfile->psymtabs_addrmap = addrmap_create_fixed (mutable_map, |
| 3525 | &objfile->objfile_obstack); |
| 3526 | } |
| 3527 | |
| 3528 | /* Read the address map data from DWARF-5 .debug_aranges, and use it to |
| 3529 | populate the objfile's psymtabs_addrmap. */ |
| 3530 | |
| 3531 | static void |
| 3532 | create_addrmap_from_aranges (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 3533 | struct dwarf2_section_info *section) |
| 3534 | { |
| 3535 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 3536 | bfd *abfd = objfile->obfd; |
| 3537 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
| 3538 | const CORE_ADDR baseaddr = ANOFFSET (objfile->section_offsets, |
| 3539 | SECT_OFF_TEXT (objfile)); |
| 3540 | |
| 3541 | auto_obstack temp_obstack; |
| 3542 | addrmap *mutable_map = addrmap_create_mutable (&temp_obstack); |
| 3543 | |
| 3544 | std::unordered_map<sect_offset, |
| 3545 | dwarf2_per_cu_data *, |
| 3546 | gdb::hash_enum<sect_offset>> |
| 3547 | debug_info_offset_to_per_cu; |
| 3548 | for (int cui = 0; cui < dwarf2_per_objfile->n_comp_units; ++cui) |
| 3549 | { |
| 3550 | dwarf2_per_cu_data *per_cu = dw2_get_cutu (dwarf2_per_objfile, cui); |
| 3551 | const auto insertpair |
| 3552 | = debug_info_offset_to_per_cu.emplace (per_cu->sect_off, per_cu); |
| 3553 | if (!insertpair.second) |
| 3554 | { |
| 3555 | warning (_("Section .debug_aranges in %s has duplicate " |
| 3556 | "debug_info_offset %u, ignoring .debug_aranges."), |
| 3557 | objfile_name (objfile), to_underlying (per_cu->sect_off)); |
| 3558 | return; |
| 3559 | } |
| 3560 | } |
| 3561 | |
| 3562 | dwarf2_read_section (objfile, section); |
| 3563 | |
| 3564 | const bfd_endian dwarf5_byte_order = gdbarch_byte_order (gdbarch); |
| 3565 | |
| 3566 | const gdb_byte *addr = section->buffer; |
| 3567 | |
| 3568 | while (addr < section->buffer + section->size) |
| 3569 | { |
| 3570 | const gdb_byte *const entry_addr = addr; |
| 3571 | unsigned int bytes_read; |
| 3572 | |
| 3573 | const LONGEST entry_length = read_initial_length (abfd, addr, |
| 3574 | &bytes_read); |
| 3575 | addr += bytes_read; |
| 3576 | |
| 3577 | const gdb_byte *const entry_end = addr + entry_length; |
| 3578 | const bool dwarf5_is_dwarf64 = bytes_read != 4; |
| 3579 | const uint8_t offset_size = dwarf5_is_dwarf64 ? 8 : 4; |
| 3580 | if (addr + entry_length > section->buffer + section->size) |
| 3581 | { |
| 3582 | warning (_("Section .debug_aranges in %s entry at offset %zu " |
| 3583 | "length %s exceeds section length %s, " |
| 3584 | "ignoring .debug_aranges."), |
| 3585 | objfile_name (objfile), entry_addr - section->buffer, |
| 3586 | plongest (bytes_read + entry_length), |
| 3587 | pulongest (section->size)); |
| 3588 | return; |
| 3589 | } |
| 3590 | |
| 3591 | /* The version number. */ |
| 3592 | const uint16_t version = read_2_bytes (abfd, addr); |
| 3593 | addr += 2; |
| 3594 | if (version != 2) |
| 3595 | { |
| 3596 | warning (_("Section .debug_aranges in %s entry at offset %zu " |
| 3597 | "has unsupported version %d, ignoring .debug_aranges."), |
| 3598 | objfile_name (objfile), entry_addr - section->buffer, |
| 3599 | version); |
| 3600 | return; |
| 3601 | } |
| 3602 | |
| 3603 | const uint64_t debug_info_offset |
| 3604 | = extract_unsigned_integer (addr, offset_size, dwarf5_byte_order); |
| 3605 | addr += offset_size; |
| 3606 | const auto per_cu_it |
| 3607 | = debug_info_offset_to_per_cu.find (sect_offset (debug_info_offset)); |
| 3608 | if (per_cu_it == debug_info_offset_to_per_cu.cend ()) |
| 3609 | { |
| 3610 | warning (_("Section .debug_aranges in %s entry at offset %zu " |
| 3611 | "debug_info_offset %s does not exists, " |
| 3612 | "ignoring .debug_aranges."), |
| 3613 | objfile_name (objfile), entry_addr - section->buffer, |
| 3614 | pulongest (debug_info_offset)); |
| 3615 | return; |
| 3616 | } |
| 3617 | dwarf2_per_cu_data *const per_cu = per_cu_it->second; |
| 3618 | |
| 3619 | const uint8_t address_size = *addr++; |
| 3620 | if (address_size < 1 || address_size > 8) |
| 3621 | { |
| 3622 | warning (_("Section .debug_aranges in %s entry at offset %zu " |
| 3623 | "address_size %u is invalid, ignoring .debug_aranges."), |
| 3624 | objfile_name (objfile), entry_addr - section->buffer, |
| 3625 | address_size); |
| 3626 | return; |
| 3627 | } |
| 3628 | |
| 3629 | const uint8_t segment_selector_size = *addr++; |
| 3630 | if (segment_selector_size != 0) |
| 3631 | { |
| 3632 | warning (_("Section .debug_aranges in %s entry at offset %zu " |
| 3633 | "segment_selector_size %u is not supported, " |
| 3634 | "ignoring .debug_aranges."), |
| 3635 | objfile_name (objfile), entry_addr - section->buffer, |
| 3636 | segment_selector_size); |
| 3637 | return; |
| 3638 | } |
| 3639 | |
| 3640 | /* Must pad to an alignment boundary that is twice the address |
| 3641 | size. It is undocumented by the DWARF standard but GCC does |
| 3642 | use it. */ |
| 3643 | for (size_t padding = ((-(addr - section->buffer)) |
| 3644 | & (2 * address_size - 1)); |
| 3645 | padding > 0; padding--) |
| 3646 | if (*addr++ != 0) |
| 3647 | { |
| 3648 | warning (_("Section .debug_aranges in %s entry at offset %zu " |
| 3649 | "padding is not zero, ignoring .debug_aranges."), |
| 3650 | objfile_name (objfile), entry_addr - section->buffer); |
| 3651 | return; |
| 3652 | } |
| 3653 | |
| 3654 | for (;;) |
| 3655 | { |
| 3656 | if (addr + 2 * address_size > entry_end) |
| 3657 | { |
| 3658 | warning (_("Section .debug_aranges in %s entry at offset %zu " |
| 3659 | "address list is not properly terminated, " |
| 3660 | "ignoring .debug_aranges."), |
| 3661 | objfile_name (objfile), entry_addr - section->buffer); |
| 3662 | return; |
| 3663 | } |
| 3664 | ULONGEST start = extract_unsigned_integer (addr, address_size, |
| 3665 | dwarf5_byte_order); |
| 3666 | addr += address_size; |
| 3667 | ULONGEST length = extract_unsigned_integer (addr, address_size, |
| 3668 | dwarf5_byte_order); |
| 3669 | addr += address_size; |
| 3670 | if (start == 0 && length == 0) |
| 3671 | break; |
| 3672 | if (start == 0 && !dwarf2_per_objfile->has_section_at_zero) |
| 3673 | { |
| 3674 | /* Symbol was eliminated due to a COMDAT group. */ |
| 3675 | continue; |
| 3676 | } |
| 3677 | ULONGEST end = start + length; |
| 3678 | start = gdbarch_adjust_dwarf2_addr (gdbarch, start + baseaddr); |
| 3679 | end = gdbarch_adjust_dwarf2_addr (gdbarch, end + baseaddr); |
| 3680 | addrmap_set_empty (mutable_map, start, end - 1, per_cu); |
| 3681 | } |
| 3682 | } |
| 3683 | |
| 3684 | objfile->psymtabs_addrmap = addrmap_create_fixed (mutable_map, |
| 3685 | &objfile->objfile_obstack); |
| 3686 | } |
| 3687 | |
| 3688 | /* The hash function for strings in the mapped index. This is the same as |
| 3689 | SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the |
| 3690 | implementation. This is necessary because the hash function is tied to the |
| 3691 | format of the mapped index file. The hash values do not have to match with |
| 3692 | SYMBOL_HASH_NEXT. |
| 3693 | |
| 3694 | Use INT_MAX for INDEX_VERSION if you generate the current index format. */ |
| 3695 | |
| 3696 | static hashval_t |
| 3697 | mapped_index_string_hash (int index_version, const void *p) |
| 3698 | { |
| 3699 | const unsigned char *str = (const unsigned char *) p; |
| 3700 | hashval_t r = 0; |
| 3701 | unsigned char c; |
| 3702 | |
| 3703 | while ((c = *str++) != 0) |
| 3704 | { |
| 3705 | if (index_version >= 5) |
| 3706 | c = tolower (c); |
| 3707 | r = r * 67 + c - 113; |
| 3708 | } |
| 3709 | |
| 3710 | return r; |
| 3711 | } |
| 3712 | |
| 3713 | /* Find a slot in the mapped index INDEX for the object named NAME. |
| 3714 | If NAME is found, set *VEC_OUT to point to the CU vector in the |
| 3715 | constant pool and return true. If NAME cannot be found, return |
| 3716 | false. */ |
| 3717 | |
| 3718 | static bool |
| 3719 | find_slot_in_mapped_hash (struct mapped_index *index, const char *name, |
| 3720 | offset_type **vec_out) |
| 3721 | { |
| 3722 | offset_type hash; |
| 3723 | offset_type slot, step; |
| 3724 | int (*cmp) (const char *, const char *); |
| 3725 | |
| 3726 | gdb::unique_xmalloc_ptr<char> without_params; |
| 3727 | if (current_language->la_language == language_cplus |
| 3728 | || current_language->la_language == language_fortran |
| 3729 | || current_language->la_language == language_d) |
| 3730 | { |
| 3731 | /* NAME is already canonical. Drop any qualifiers as .gdb_index does |
| 3732 | not contain any. */ |
| 3733 | |
| 3734 | if (strchr (name, '(') != NULL) |
| 3735 | { |
| 3736 | without_params = cp_remove_params (name); |
| 3737 | |
| 3738 | if (without_params != NULL) |
| 3739 | name = without_params.get (); |
| 3740 | } |
| 3741 | } |
| 3742 | |
| 3743 | /* Index version 4 did not support case insensitive searches. But the |
| 3744 | indices for case insensitive languages are built in lowercase, therefore |
| 3745 | simulate our NAME being searched is also lowercased. */ |
| 3746 | hash = mapped_index_string_hash ((index->version == 4 |
| 3747 | && case_sensitivity == case_sensitive_off |
| 3748 | ? 5 : index->version), |
| 3749 | name); |
| 3750 | |
| 3751 | slot = hash & (index->symbol_table.size () - 1); |
| 3752 | step = ((hash * 17) & (index->symbol_table.size () - 1)) | 1; |
| 3753 | cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp); |
| 3754 | |
| 3755 | for (;;) |
| 3756 | { |
| 3757 | const char *str; |
| 3758 | |
| 3759 | const auto &bucket = index->symbol_table[slot]; |
| 3760 | if (bucket.name == 0 && bucket.vec == 0) |
| 3761 | return false; |
| 3762 | |
| 3763 | str = index->constant_pool + MAYBE_SWAP (bucket.name); |
| 3764 | if (!cmp (name, str)) |
| 3765 | { |
| 3766 | *vec_out = (offset_type *) (index->constant_pool |
| 3767 | + MAYBE_SWAP (bucket.vec)); |
| 3768 | return true; |
| 3769 | } |
| 3770 | |
| 3771 | slot = (slot + step) & (index->symbol_table.size () - 1); |
| 3772 | } |
| 3773 | } |
| 3774 | |
| 3775 | /* A helper function that reads the .gdb_index from SECTION and fills |
| 3776 | in MAP. FILENAME is the name of the file containing the section; |
| 3777 | it is used for error reporting. DEPRECATED_OK is nonzero if it is |
| 3778 | ok to use deprecated sections. |
| 3779 | |
| 3780 | CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are |
| 3781 | out parameters that are filled in with information about the CU and |
| 3782 | TU lists in the section. |
| 3783 | |
| 3784 | Returns 1 if all went well, 0 otherwise. */ |
| 3785 | |
| 3786 | static int |
| 3787 | read_index_from_section (struct objfile *objfile, |
| 3788 | const char *filename, |
| 3789 | int deprecated_ok, |
| 3790 | struct dwarf2_section_info *section, |
| 3791 | struct mapped_index *map, |
| 3792 | const gdb_byte **cu_list, |
| 3793 | offset_type *cu_list_elements, |
| 3794 | const gdb_byte **types_list, |
| 3795 | offset_type *types_list_elements) |
| 3796 | { |
| 3797 | const gdb_byte *addr; |
| 3798 | offset_type version; |
| 3799 | offset_type *metadata; |
| 3800 | int i; |
| 3801 | |
| 3802 | if (dwarf2_section_empty_p (section)) |
| 3803 | return 0; |
| 3804 | |
| 3805 | /* Older elfutils strip versions could keep the section in the main |
| 3806 | executable while splitting it for the separate debug info file. */ |
| 3807 | if ((get_section_flags (section) & SEC_HAS_CONTENTS) == 0) |
| 3808 | return 0; |
| 3809 | |
| 3810 | dwarf2_read_section (objfile, section); |
| 3811 | |
| 3812 | addr = section->buffer; |
| 3813 | /* Version check. */ |
| 3814 | version = MAYBE_SWAP (*(offset_type *) addr); |
| 3815 | /* Versions earlier than 3 emitted every copy of a psymbol. This |
| 3816 | causes the index to behave very poorly for certain requests. Version 3 |
| 3817 | contained incomplete addrmap. So, it seems better to just ignore such |
| 3818 | indices. */ |
| 3819 | if (version < 4) |
| 3820 | { |
| 3821 | static int warning_printed = 0; |
| 3822 | if (!warning_printed) |
| 3823 | { |
| 3824 | warning (_("Skipping obsolete .gdb_index section in %s."), |
| 3825 | filename); |
| 3826 | warning_printed = 1; |
| 3827 | } |
| 3828 | return 0; |
| 3829 | } |
| 3830 | /* Index version 4 uses a different hash function than index version |
| 3831 | 5 and later. |
| 3832 | |
| 3833 | Versions earlier than 6 did not emit psymbols for inlined |
| 3834 | functions. Using these files will cause GDB not to be able to |
| 3835 | set breakpoints on inlined functions by name, so we ignore these |
| 3836 | indices unless the user has done |
| 3837 | "set use-deprecated-index-sections on". */ |
| 3838 | if (version < 6 && !deprecated_ok) |
| 3839 | { |
| 3840 | static int warning_printed = 0; |
| 3841 | if (!warning_printed) |
| 3842 | { |
| 3843 | warning (_("\ |
| 3844 | Skipping deprecated .gdb_index section in %s.\n\ |
| 3845 | Do \"set use-deprecated-index-sections on\" before the file is read\n\ |
| 3846 | to use the section anyway."), |
| 3847 | filename); |
| 3848 | warning_printed = 1; |
| 3849 | } |
| 3850 | return 0; |
| 3851 | } |
| 3852 | /* Version 7 indices generated by gold refer to the CU for a symbol instead |
| 3853 | of the TU (for symbols coming from TUs), |
| 3854 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. |
| 3855 | Plus gold-generated indices can have duplicate entries for global symbols, |
| 3856 | http://sourceware.org/bugzilla/show_bug.cgi?id=15646. |
| 3857 | These are just performance bugs, and we can't distinguish gdb-generated |
| 3858 | indices from gold-generated ones, so issue no warning here. */ |
| 3859 | |
| 3860 | /* Indexes with higher version than the one supported by GDB may be no |
| 3861 | longer backward compatible. */ |
| 3862 | if (version > 8) |
| 3863 | return 0; |
| 3864 | |
| 3865 | map->version = version; |
| 3866 | map->total_size = section->size; |
| 3867 | |
| 3868 | metadata = (offset_type *) (addr + sizeof (offset_type)); |
| 3869 | |
| 3870 | i = 0; |
| 3871 | *cu_list = addr + MAYBE_SWAP (metadata[i]); |
| 3872 | *cu_list_elements = ((MAYBE_SWAP (metadata[i + 1]) - MAYBE_SWAP (metadata[i])) |
| 3873 | / 8); |
| 3874 | ++i; |
| 3875 | |
| 3876 | *types_list = addr + MAYBE_SWAP (metadata[i]); |
| 3877 | *types_list_elements = ((MAYBE_SWAP (metadata[i + 1]) |
| 3878 | - MAYBE_SWAP (metadata[i])) |
| 3879 | / 8); |
| 3880 | ++i; |
| 3881 | |
| 3882 | const gdb_byte *address_table = addr + MAYBE_SWAP (metadata[i]); |
| 3883 | const gdb_byte *address_table_end = addr + MAYBE_SWAP (metadata[i + 1]); |
| 3884 | map->address_table |
| 3885 | = gdb::array_view<const gdb_byte> (address_table, address_table_end); |
| 3886 | ++i; |
| 3887 | |
| 3888 | const gdb_byte *symbol_table = addr + MAYBE_SWAP (metadata[i]); |
| 3889 | const gdb_byte *symbol_table_end = addr + MAYBE_SWAP (metadata[i + 1]); |
| 3890 | map->symbol_table |
| 3891 | = gdb::array_view<mapped_index::symbol_table_slot> |
| 3892 | ((mapped_index::symbol_table_slot *) symbol_table, |
| 3893 | (mapped_index::symbol_table_slot *) symbol_table_end); |
| 3894 | |
| 3895 | ++i; |
| 3896 | map->constant_pool = (char *) (addr + MAYBE_SWAP (metadata[i])); |
| 3897 | |
| 3898 | return 1; |
| 3899 | } |
| 3900 | |
| 3901 | /* Read .gdb_index. If everything went ok, initialize the "quick" |
| 3902 | elements of all the CUs and return 1. Otherwise, return 0. */ |
| 3903 | |
| 3904 | static int |
| 3905 | dwarf2_read_index (struct objfile *objfile) |
| 3906 | { |
| 3907 | struct mapped_index local_map, *map; |
| 3908 | const gdb_byte *cu_list, *types_list, *dwz_list = NULL; |
| 3909 | offset_type cu_list_elements, types_list_elements, dwz_list_elements = 0; |
| 3910 | struct dwz_file *dwz; |
| 3911 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 3912 | = get_dwarf2_per_objfile (objfile); |
| 3913 | |
| 3914 | if (!read_index_from_section (objfile, objfile_name (objfile), |
| 3915 | use_deprecated_index_sections, |
| 3916 | &dwarf2_per_objfile->gdb_index, &local_map, |
| 3917 | &cu_list, &cu_list_elements, |
| 3918 | &types_list, &types_list_elements)) |
| 3919 | return 0; |
| 3920 | |
| 3921 | /* Don't use the index if it's empty. */ |
| 3922 | if (local_map.symbol_table.empty ()) |
| 3923 | return 0; |
| 3924 | |
| 3925 | /* If there is a .dwz file, read it so we can get its CU list as |
| 3926 | well. */ |
| 3927 | dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
| 3928 | if (dwz != NULL) |
| 3929 | { |
| 3930 | struct mapped_index dwz_map; |
| 3931 | const gdb_byte *dwz_types_ignore; |
| 3932 | offset_type dwz_types_elements_ignore; |
| 3933 | |
| 3934 | if (!read_index_from_section (objfile, bfd_get_filename (dwz->dwz_bfd), |
| 3935 | 1, |
| 3936 | &dwz->gdb_index, &dwz_map, |
| 3937 | &dwz_list, &dwz_list_elements, |
| 3938 | &dwz_types_ignore, |
| 3939 | &dwz_types_elements_ignore)) |
| 3940 | { |
| 3941 | warning (_("could not read '.gdb_index' section from %s; skipping"), |
| 3942 | bfd_get_filename (dwz->dwz_bfd)); |
| 3943 | return 0; |
| 3944 | } |
| 3945 | } |
| 3946 | |
| 3947 | create_cus_from_index (objfile, cu_list, cu_list_elements, dwz_list, |
| 3948 | dwz_list_elements); |
| 3949 | |
| 3950 | if (types_list_elements) |
| 3951 | { |
| 3952 | struct dwarf2_section_info *section; |
| 3953 | |
| 3954 | /* We can only handle a single .debug_types when we have an |
| 3955 | index. */ |
| 3956 | if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) != 1) |
| 3957 | return 0; |
| 3958 | |
| 3959 | section = VEC_index (dwarf2_section_info_def, |
| 3960 | dwarf2_per_objfile->types, 0); |
| 3961 | |
| 3962 | create_signatured_type_table_from_index (objfile, section, types_list, |
| 3963 | types_list_elements); |
| 3964 | } |
| 3965 | |
| 3966 | create_addrmap_from_index (dwarf2_per_objfile, &local_map); |
| 3967 | |
| 3968 | map = XOBNEW (&objfile->objfile_obstack, struct mapped_index); |
| 3969 | map = new (map) mapped_index (); |
| 3970 | *map = local_map; |
| 3971 | |
| 3972 | dwarf2_per_objfile->index_table = map; |
| 3973 | dwarf2_per_objfile->using_index = 1; |
| 3974 | dwarf2_per_objfile->quick_file_names_table = |
| 3975 | create_quick_file_names_table (dwarf2_per_objfile->n_comp_units); |
| 3976 | |
| 3977 | return 1; |
| 3978 | } |
| 3979 | |
| 3980 | /* die_reader_func for dw2_get_file_names. */ |
| 3981 | |
| 3982 | static void |
| 3983 | dw2_get_file_names_reader (const struct die_reader_specs *reader, |
| 3984 | const gdb_byte *info_ptr, |
| 3985 | struct die_info *comp_unit_die, |
| 3986 | int has_children, |
| 3987 | void *data) |
| 3988 | { |
| 3989 | struct dwarf2_cu *cu = reader->cu; |
| 3990 | struct dwarf2_per_cu_data *this_cu = cu->per_cu; |
| 3991 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 3992 | = cu->per_cu->dwarf2_per_objfile; |
| 3993 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 3994 | struct dwarf2_per_cu_data *lh_cu; |
| 3995 | struct attribute *attr; |
| 3996 | int i; |
| 3997 | void **slot; |
| 3998 | struct quick_file_names *qfn; |
| 3999 | |
| 4000 | gdb_assert (! this_cu->is_debug_types); |
| 4001 | |
| 4002 | /* Our callers never want to match partial units -- instead they |
| 4003 | will match the enclosing full CU. */ |
| 4004 | if (comp_unit_die->tag == DW_TAG_partial_unit) |
| 4005 | { |
| 4006 | this_cu->v.quick->no_file_data = 1; |
| 4007 | return; |
| 4008 | } |
| 4009 | |
| 4010 | lh_cu = this_cu; |
| 4011 | slot = NULL; |
| 4012 | |
| 4013 | line_header_up lh; |
| 4014 | sect_offset line_offset {}; |
| 4015 | |
| 4016 | attr = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, cu); |
| 4017 | if (attr) |
| 4018 | { |
| 4019 | struct quick_file_names find_entry; |
| 4020 | |
| 4021 | line_offset = (sect_offset) DW_UNSND (attr); |
| 4022 | |
| 4023 | /* We may have already read in this line header (TU line header sharing). |
| 4024 | If we have we're done. */ |
| 4025 | find_entry.hash.dwo_unit = cu->dwo_unit; |
| 4026 | find_entry.hash.line_sect_off = line_offset; |
| 4027 | slot = htab_find_slot (dwarf2_per_objfile->quick_file_names_table, |
| 4028 | &find_entry, INSERT); |
| 4029 | if (*slot != NULL) |
| 4030 | { |
| 4031 | lh_cu->v.quick->file_names = (struct quick_file_names *) *slot; |
| 4032 | return; |
| 4033 | } |
| 4034 | |
| 4035 | lh = dwarf_decode_line_header (line_offset, cu); |
| 4036 | } |
| 4037 | if (lh == NULL) |
| 4038 | { |
| 4039 | lh_cu->v.quick->no_file_data = 1; |
| 4040 | return; |
| 4041 | } |
| 4042 | |
| 4043 | qfn = XOBNEW (&objfile->objfile_obstack, struct quick_file_names); |
| 4044 | qfn->hash.dwo_unit = cu->dwo_unit; |
| 4045 | qfn->hash.line_sect_off = line_offset; |
| 4046 | gdb_assert (slot != NULL); |
| 4047 | *slot = qfn; |
| 4048 | |
| 4049 | file_and_directory fnd = find_file_and_directory (comp_unit_die, cu); |
| 4050 | |
| 4051 | qfn->num_file_names = lh->file_names.size (); |
| 4052 | qfn->file_names = |
| 4053 | XOBNEWVEC (&objfile->objfile_obstack, const char *, lh->file_names.size ()); |
| 4054 | for (i = 0; i < lh->file_names.size (); ++i) |
| 4055 | qfn->file_names[i] = file_full_name (i + 1, lh.get (), fnd.comp_dir); |
| 4056 | qfn->real_names = NULL; |
| 4057 | |
| 4058 | lh_cu->v.quick->file_names = qfn; |
| 4059 | } |
| 4060 | |
| 4061 | /* A helper for the "quick" functions which attempts to read the line |
| 4062 | table for THIS_CU. */ |
| 4063 | |
| 4064 | static struct quick_file_names * |
| 4065 | dw2_get_file_names (struct dwarf2_per_cu_data *this_cu) |
| 4066 | { |
| 4067 | /* This should never be called for TUs. */ |
| 4068 | gdb_assert (! this_cu->is_debug_types); |
| 4069 | /* Nor type unit groups. */ |
| 4070 | gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu)); |
| 4071 | |
| 4072 | if (this_cu->v.quick->file_names != NULL) |
| 4073 | return this_cu->v.quick->file_names; |
| 4074 | /* If we know there is no line data, no point in looking again. */ |
| 4075 | if (this_cu->v.quick->no_file_data) |
| 4076 | return NULL; |
| 4077 | |
| 4078 | init_cutu_and_read_dies_simple (this_cu, dw2_get_file_names_reader, NULL); |
| 4079 | |
| 4080 | if (this_cu->v.quick->no_file_data) |
| 4081 | return NULL; |
| 4082 | return this_cu->v.quick->file_names; |
| 4083 | } |
| 4084 | |
| 4085 | /* A helper for the "quick" functions which computes and caches the |
| 4086 | real path for a given file name from the line table. */ |
| 4087 | |
| 4088 | static const char * |
| 4089 | dw2_get_real_path (struct objfile *objfile, |
| 4090 | struct quick_file_names *qfn, int index) |
| 4091 | { |
| 4092 | if (qfn->real_names == NULL) |
| 4093 | qfn->real_names = OBSTACK_CALLOC (&objfile->objfile_obstack, |
| 4094 | qfn->num_file_names, const char *); |
| 4095 | |
| 4096 | if (qfn->real_names[index] == NULL) |
| 4097 | qfn->real_names[index] = gdb_realpath (qfn->file_names[index]).release (); |
| 4098 | |
| 4099 | return qfn->real_names[index]; |
| 4100 | } |
| 4101 | |
| 4102 | static struct symtab * |
| 4103 | dw2_find_last_source_symtab (struct objfile *objfile) |
| 4104 | { |
| 4105 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 4106 | = get_dwarf2_per_objfile (objfile); |
| 4107 | int index = dwarf2_per_objfile->n_comp_units - 1; |
| 4108 | dwarf2_per_cu_data *dwarf_cu = dw2_get_cutu (dwarf2_per_objfile, index); |
| 4109 | compunit_symtab *cust = dw2_instantiate_symtab (dwarf_cu); |
| 4110 | |
| 4111 | if (cust == NULL) |
| 4112 | return NULL; |
| 4113 | |
| 4114 | return compunit_primary_filetab (cust); |
| 4115 | } |
| 4116 | |
| 4117 | /* Traversal function for dw2_forget_cached_source_info. */ |
| 4118 | |
| 4119 | static int |
| 4120 | dw2_free_cached_file_names (void **slot, void *info) |
| 4121 | { |
| 4122 | struct quick_file_names *file_data = (struct quick_file_names *) *slot; |
| 4123 | |
| 4124 | if (file_data->real_names) |
| 4125 | { |
| 4126 | int i; |
| 4127 | |
| 4128 | for (i = 0; i < file_data->num_file_names; ++i) |
| 4129 | { |
| 4130 | xfree ((void*) file_data->real_names[i]); |
| 4131 | file_data->real_names[i] = NULL; |
| 4132 | } |
| 4133 | } |
| 4134 | |
| 4135 | return 1; |
| 4136 | } |
| 4137 | |
| 4138 | static void |
| 4139 | dw2_forget_cached_source_info (struct objfile *objfile) |
| 4140 | { |
| 4141 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 4142 | = get_dwarf2_per_objfile (objfile); |
| 4143 | |
| 4144 | htab_traverse_noresize (dwarf2_per_objfile->quick_file_names_table, |
| 4145 | dw2_free_cached_file_names, NULL); |
| 4146 | } |
| 4147 | |
| 4148 | /* Helper function for dw2_map_symtabs_matching_filename that expands |
| 4149 | the symtabs and calls the iterator. */ |
| 4150 | |
| 4151 | static int |
| 4152 | dw2_map_expand_apply (struct objfile *objfile, |
| 4153 | struct dwarf2_per_cu_data *per_cu, |
| 4154 | const char *name, const char *real_path, |
| 4155 | gdb::function_view<bool (symtab *)> callback) |
| 4156 | { |
| 4157 | struct compunit_symtab *last_made = objfile->compunit_symtabs; |
| 4158 | |
| 4159 | /* Don't visit already-expanded CUs. */ |
| 4160 | if (per_cu->v.quick->compunit_symtab) |
| 4161 | return 0; |
| 4162 | |
| 4163 | /* This may expand more than one symtab, and we want to iterate over |
| 4164 | all of them. */ |
| 4165 | dw2_instantiate_symtab (per_cu); |
| 4166 | |
| 4167 | return iterate_over_some_symtabs (name, real_path, objfile->compunit_symtabs, |
| 4168 | last_made, callback); |
| 4169 | } |
| 4170 | |
| 4171 | /* Implementation of the map_symtabs_matching_filename method. */ |
| 4172 | |
| 4173 | static bool |
| 4174 | dw2_map_symtabs_matching_filename |
| 4175 | (struct objfile *objfile, const char *name, const char *real_path, |
| 4176 | gdb::function_view<bool (symtab *)> callback) |
| 4177 | { |
| 4178 | int i; |
| 4179 | const char *name_basename = lbasename (name); |
| 4180 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 4181 | = get_dwarf2_per_objfile (objfile); |
| 4182 | |
| 4183 | /* The rule is CUs specify all the files, including those used by |
| 4184 | any TU, so there's no need to scan TUs here. */ |
| 4185 | |
| 4186 | for (int i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
| 4187 | { |
| 4188 | int j; |
| 4189 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (dwarf2_per_objfile, i); |
| 4190 | struct quick_file_names *file_data; |
| 4191 | |
| 4192 | /* We only need to look at symtabs not already expanded. */ |
| 4193 | if (per_cu->v.quick->compunit_symtab) |
| 4194 | continue; |
| 4195 | |
| 4196 | file_data = dw2_get_file_names (per_cu); |
| 4197 | if (file_data == NULL) |
| 4198 | continue; |
| 4199 | |
| 4200 | for (j = 0; j < file_data->num_file_names; ++j) |
| 4201 | { |
| 4202 | const char *this_name = file_data->file_names[j]; |
| 4203 | const char *this_real_name; |
| 4204 | |
| 4205 | if (compare_filenames_for_search (this_name, name)) |
| 4206 | { |
| 4207 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
| 4208 | callback)) |
| 4209 | return true; |
| 4210 | continue; |
| 4211 | } |
| 4212 | |
| 4213 | /* Before we invoke realpath, which can get expensive when many |
| 4214 | files are involved, do a quick comparison of the basenames. */ |
| 4215 | if (! basenames_may_differ |
| 4216 | && FILENAME_CMP (lbasename (this_name), name_basename) != 0) |
| 4217 | continue; |
| 4218 | |
| 4219 | this_real_name = dw2_get_real_path (objfile, file_data, j); |
| 4220 | if (compare_filenames_for_search (this_real_name, name)) |
| 4221 | { |
| 4222 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
| 4223 | callback)) |
| 4224 | return true; |
| 4225 | continue; |
| 4226 | } |
| 4227 | |
| 4228 | if (real_path != NULL) |
| 4229 | { |
| 4230 | gdb_assert (IS_ABSOLUTE_PATH (real_path)); |
| 4231 | gdb_assert (IS_ABSOLUTE_PATH (name)); |
| 4232 | if (this_real_name != NULL |
| 4233 | && FILENAME_CMP (real_path, this_real_name) == 0) |
| 4234 | { |
| 4235 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
| 4236 | callback)) |
| 4237 | return true; |
| 4238 | continue; |
| 4239 | } |
| 4240 | } |
| 4241 | } |
| 4242 | } |
| 4243 | |
| 4244 | return false; |
| 4245 | } |
| 4246 | |
| 4247 | /* Struct used to manage iterating over all CUs looking for a symbol. */ |
| 4248 | |
| 4249 | struct dw2_symtab_iterator |
| 4250 | { |
| 4251 | /* The dwarf2_per_objfile owning the CUs we are iterating on. */ |
| 4252 | struct dwarf2_per_objfile *dwarf2_per_objfile; |
| 4253 | /* If non-zero, only look for symbols that match BLOCK_INDEX. */ |
| 4254 | int want_specific_block; |
| 4255 | /* One of GLOBAL_BLOCK or STATIC_BLOCK. |
| 4256 | Unused if !WANT_SPECIFIC_BLOCK. */ |
| 4257 | int block_index; |
| 4258 | /* The kind of symbol we're looking for. */ |
| 4259 | domain_enum domain; |
| 4260 | /* The list of CUs from the index entry of the symbol, |
| 4261 | or NULL if not found. */ |
| 4262 | offset_type *vec; |
| 4263 | /* The next element in VEC to look at. */ |
| 4264 | int next; |
| 4265 | /* The number of elements in VEC, or zero if there is no match. */ |
| 4266 | int length; |
| 4267 | /* Have we seen a global version of the symbol? |
| 4268 | If so we can ignore all further global instances. |
| 4269 | This is to work around gold/15646, inefficient gold-generated |
| 4270 | indices. */ |
| 4271 | int global_seen; |
| 4272 | }; |
| 4273 | |
| 4274 | /* Initialize the index symtab iterator ITER. |
| 4275 | If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols |
| 4276 | in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */ |
| 4277 | |
| 4278 | static void |
| 4279 | dw2_symtab_iter_init (struct dw2_symtab_iterator *iter, |
| 4280 | struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 4281 | int want_specific_block, |
| 4282 | int block_index, |
| 4283 | domain_enum domain, |
| 4284 | const char *name) |
| 4285 | { |
| 4286 | iter->dwarf2_per_objfile = dwarf2_per_objfile; |
| 4287 | iter->want_specific_block = want_specific_block; |
| 4288 | iter->block_index = block_index; |
| 4289 | iter->domain = domain; |
| 4290 | iter->next = 0; |
| 4291 | iter->global_seen = 0; |
| 4292 | |
| 4293 | mapped_index *index = dwarf2_per_objfile->index_table; |
| 4294 | |
| 4295 | /* index is NULL if OBJF_READNOW. */ |
| 4296 | if (index != NULL && find_slot_in_mapped_hash (index, name, &iter->vec)) |
| 4297 | iter->length = MAYBE_SWAP (*iter->vec); |
| 4298 | else |
| 4299 | { |
| 4300 | iter->vec = NULL; |
| 4301 | iter->length = 0; |
| 4302 | } |
| 4303 | } |
| 4304 | |
| 4305 | /* Return the next matching CU or NULL if there are no more. */ |
| 4306 | |
| 4307 | static struct dwarf2_per_cu_data * |
| 4308 | dw2_symtab_iter_next (struct dw2_symtab_iterator *iter) |
| 4309 | { |
| 4310 | struct dwarf2_per_objfile *dwarf2_per_objfile = iter->dwarf2_per_objfile; |
| 4311 | |
| 4312 | for ( ; iter->next < iter->length; ++iter->next) |
| 4313 | { |
| 4314 | offset_type cu_index_and_attrs = |
| 4315 | MAYBE_SWAP (iter->vec[iter->next + 1]); |
| 4316 | offset_type cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); |
| 4317 | struct dwarf2_per_cu_data *per_cu; |
| 4318 | int want_static = iter->block_index != GLOBAL_BLOCK; |
| 4319 | /* This value is only valid for index versions >= 7. */ |
| 4320 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); |
| 4321 | gdb_index_symbol_kind symbol_kind = |
| 4322 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); |
| 4323 | /* Only check the symbol attributes if they're present. |
| 4324 | Indices prior to version 7 don't record them, |
| 4325 | and indices >= 7 may elide them for certain symbols |
| 4326 | (gold does this). */ |
| 4327 | int attrs_valid = |
| 4328 | (dwarf2_per_objfile->index_table->version >= 7 |
| 4329 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); |
| 4330 | |
| 4331 | /* Don't crash on bad data. */ |
| 4332 | if (cu_index >= (dwarf2_per_objfile->n_comp_units |
| 4333 | + dwarf2_per_objfile->n_type_units)) |
| 4334 | { |
| 4335 | complaint (&symfile_complaints, |
| 4336 | _(".gdb_index entry has bad CU index" |
| 4337 | " [in module %s]"), |
| 4338 | objfile_name (dwarf2_per_objfile->objfile)); |
| 4339 | continue; |
| 4340 | } |
| 4341 | |
| 4342 | per_cu = dw2_get_cutu (dwarf2_per_objfile, cu_index); |
| 4343 | |
| 4344 | /* Skip if already read in. */ |
| 4345 | if (per_cu->v.quick->compunit_symtab) |
| 4346 | continue; |
| 4347 | |
| 4348 | /* Check static vs global. */ |
| 4349 | if (attrs_valid) |
| 4350 | { |
| 4351 | if (iter->want_specific_block |
| 4352 | && want_static != is_static) |
| 4353 | continue; |
| 4354 | /* Work around gold/15646. */ |
| 4355 | if (!is_static && iter->global_seen) |
| 4356 | continue; |
| 4357 | if (!is_static) |
| 4358 | iter->global_seen = 1; |
| 4359 | } |
| 4360 | |
| 4361 | /* Only check the symbol's kind if it has one. */ |
| 4362 | if (attrs_valid) |
| 4363 | { |
| 4364 | switch (iter->domain) |
| 4365 | { |
| 4366 | case VAR_DOMAIN: |
| 4367 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE |
| 4368 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION |
| 4369 | /* Some types are also in VAR_DOMAIN. */ |
| 4370 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) |
| 4371 | continue; |
| 4372 | break; |
| 4373 | case STRUCT_DOMAIN: |
| 4374 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) |
| 4375 | continue; |
| 4376 | break; |
| 4377 | case LABEL_DOMAIN: |
| 4378 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER) |
| 4379 | continue; |
| 4380 | break; |
| 4381 | default: |
| 4382 | break; |
| 4383 | } |
| 4384 | } |
| 4385 | |
| 4386 | ++iter->next; |
| 4387 | return per_cu; |
| 4388 | } |
| 4389 | |
| 4390 | return NULL; |
| 4391 | } |
| 4392 | |
| 4393 | static struct compunit_symtab * |
| 4394 | dw2_lookup_symbol (struct objfile *objfile, int block_index, |
| 4395 | const char *name, domain_enum domain) |
| 4396 | { |
| 4397 | struct compunit_symtab *stab_best = NULL; |
| 4398 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 4399 | = get_dwarf2_per_objfile (objfile); |
| 4400 | |
| 4401 | lookup_name_info lookup_name (name, symbol_name_match_type::FULL); |
| 4402 | |
| 4403 | struct dw2_symtab_iterator iter; |
| 4404 | struct dwarf2_per_cu_data *per_cu; |
| 4405 | |
| 4406 | dw2_symtab_iter_init (&iter, dwarf2_per_objfile, 1, block_index, domain, name); |
| 4407 | |
| 4408 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) |
| 4409 | { |
| 4410 | struct symbol *sym, *with_opaque = NULL; |
| 4411 | struct compunit_symtab *stab = dw2_instantiate_symtab (per_cu); |
| 4412 | const struct blockvector *bv = COMPUNIT_BLOCKVECTOR (stab); |
| 4413 | struct block *block = BLOCKVECTOR_BLOCK (bv, block_index); |
| 4414 | |
| 4415 | sym = block_find_symbol (block, name, domain, |
| 4416 | block_find_non_opaque_type_preferred, |
| 4417 | &with_opaque); |
| 4418 | |
| 4419 | /* Some caution must be observed with overloaded functions |
| 4420 | and methods, since the index will not contain any overload |
| 4421 | information (but NAME might contain it). */ |
| 4422 | |
| 4423 | if (sym != NULL |
| 4424 | && SYMBOL_MATCHES_SEARCH_NAME (sym, lookup_name)) |
| 4425 | return stab; |
| 4426 | if (with_opaque != NULL |
| 4427 | && SYMBOL_MATCHES_SEARCH_NAME (with_opaque, lookup_name)) |
| 4428 | stab_best = stab; |
| 4429 | |
| 4430 | /* Keep looking through other CUs. */ |
| 4431 | } |
| 4432 | |
| 4433 | return stab_best; |
| 4434 | } |
| 4435 | |
| 4436 | static void |
| 4437 | dw2_print_stats (struct objfile *objfile) |
| 4438 | { |
| 4439 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 4440 | = get_dwarf2_per_objfile (objfile); |
| 4441 | int total = dwarf2_per_objfile->n_comp_units + dwarf2_per_objfile->n_type_units; |
| 4442 | int count = 0; |
| 4443 | |
| 4444 | for (int i = 0; i < total; ++i) |
| 4445 | { |
| 4446 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (dwarf2_per_objfile, i); |
| 4447 | |
| 4448 | if (!per_cu->v.quick->compunit_symtab) |
| 4449 | ++count; |
| 4450 | } |
| 4451 | printf_filtered (_(" Number of read CUs: %d\n"), total - count); |
| 4452 | printf_filtered (_(" Number of unread CUs: %d\n"), count); |
| 4453 | } |
| 4454 | |
| 4455 | /* This dumps minimal information about the index. |
| 4456 | It is called via "mt print objfiles". |
| 4457 | One use is to verify .gdb_index has been loaded by the |
| 4458 | gdb.dwarf2/gdb-index.exp testcase. */ |
| 4459 | |
| 4460 | static void |
| 4461 | dw2_dump (struct objfile *objfile) |
| 4462 | { |
| 4463 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 4464 | = get_dwarf2_per_objfile (objfile); |
| 4465 | |
| 4466 | gdb_assert (dwarf2_per_objfile->using_index); |
| 4467 | printf_filtered (".gdb_index:"); |
| 4468 | if (dwarf2_per_objfile->index_table != NULL) |
| 4469 | { |
| 4470 | printf_filtered (" version %d\n", |
| 4471 | dwarf2_per_objfile->index_table->version); |
| 4472 | } |
| 4473 | else |
| 4474 | printf_filtered (" faked for \"readnow\"\n"); |
| 4475 | printf_filtered ("\n"); |
| 4476 | } |
| 4477 | |
| 4478 | static void |
| 4479 | dw2_relocate (struct objfile *objfile, |
| 4480 | const struct section_offsets *new_offsets, |
| 4481 | const struct section_offsets *delta) |
| 4482 | { |
| 4483 | /* There's nothing to relocate here. */ |
| 4484 | } |
| 4485 | |
| 4486 | static void |
| 4487 | dw2_expand_symtabs_for_function (struct objfile *objfile, |
| 4488 | const char *func_name) |
| 4489 | { |
| 4490 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 4491 | = get_dwarf2_per_objfile (objfile); |
| 4492 | |
| 4493 | struct dw2_symtab_iterator iter; |
| 4494 | struct dwarf2_per_cu_data *per_cu; |
| 4495 | |
| 4496 | /* Note: It doesn't matter what we pass for block_index here. */ |
| 4497 | dw2_symtab_iter_init (&iter, dwarf2_per_objfile, 0, GLOBAL_BLOCK, VAR_DOMAIN, |
| 4498 | func_name); |
| 4499 | |
| 4500 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) |
| 4501 | dw2_instantiate_symtab (per_cu); |
| 4502 | |
| 4503 | } |
| 4504 | |
| 4505 | static void |
| 4506 | dw2_expand_all_symtabs (struct objfile *objfile) |
| 4507 | { |
| 4508 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 4509 | = get_dwarf2_per_objfile (objfile); |
| 4510 | int total_units = (dwarf2_per_objfile->n_comp_units |
| 4511 | + dwarf2_per_objfile->n_type_units); |
| 4512 | |
| 4513 | for (int i = 0; i < total_units; ++i) |
| 4514 | { |
| 4515 | struct dwarf2_per_cu_data *per_cu |
| 4516 | = dw2_get_cutu (dwarf2_per_objfile, i); |
| 4517 | |
| 4518 | dw2_instantiate_symtab (per_cu); |
| 4519 | } |
| 4520 | } |
| 4521 | |
| 4522 | static void |
| 4523 | dw2_expand_symtabs_with_fullname (struct objfile *objfile, |
| 4524 | const char *fullname) |
| 4525 | { |
| 4526 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 4527 | = get_dwarf2_per_objfile (objfile); |
| 4528 | |
| 4529 | /* We don't need to consider type units here. |
| 4530 | This is only called for examining code, e.g. expand_line_sal. |
| 4531 | There can be an order of magnitude (or more) more type units |
| 4532 | than comp units, and we avoid them if we can. */ |
| 4533 | |
| 4534 | for (int i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
| 4535 | { |
| 4536 | int j; |
| 4537 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (dwarf2_per_objfile, i); |
| 4538 | struct quick_file_names *file_data; |
| 4539 | |
| 4540 | /* We only need to look at symtabs not already expanded. */ |
| 4541 | if (per_cu->v.quick->compunit_symtab) |
| 4542 | continue; |
| 4543 | |
| 4544 | file_data = dw2_get_file_names (per_cu); |
| 4545 | if (file_data == NULL) |
| 4546 | continue; |
| 4547 | |
| 4548 | for (j = 0; j < file_data->num_file_names; ++j) |
| 4549 | { |
| 4550 | const char *this_fullname = file_data->file_names[j]; |
| 4551 | |
| 4552 | if (filename_cmp (this_fullname, fullname) == 0) |
| 4553 | { |
| 4554 | dw2_instantiate_symtab (per_cu); |
| 4555 | break; |
| 4556 | } |
| 4557 | } |
| 4558 | } |
| 4559 | } |
| 4560 | |
| 4561 | static void |
| 4562 | dw2_map_matching_symbols (struct objfile *objfile, |
| 4563 | const char * name, domain_enum domain, |
| 4564 | int global, |
| 4565 | int (*callback) (struct block *, |
| 4566 | struct symbol *, void *), |
| 4567 | void *data, symbol_name_match_type match, |
| 4568 | symbol_compare_ftype *ordered_compare) |
| 4569 | { |
| 4570 | /* Currently unimplemented; used for Ada. The function can be called if the |
| 4571 | current language is Ada for a non-Ada objfile using GNU index. As Ada |
| 4572 | does not look for non-Ada symbols this function should just return. */ |
| 4573 | } |
| 4574 | |
| 4575 | /* Symbol name matcher for .gdb_index names. |
| 4576 | |
| 4577 | Symbol names in .gdb_index have a few particularities: |
| 4578 | |
| 4579 | - There's no indication of which is the language of each symbol. |
| 4580 | |
| 4581 | Since each language has its own symbol name matching algorithm, |
| 4582 | and we don't know which language is the right one, we must match |
| 4583 | each symbol against all languages. This would be a potential |
| 4584 | performance problem if it were not mitigated by the |
| 4585 | mapped_index::name_components lookup table, which significantly |
| 4586 | reduces the number of times we need to call into this matcher, |
| 4587 | making it a non-issue. |
| 4588 | |
| 4589 | - Symbol names in the index have no overload (parameter) |
| 4590 | information. I.e., in C++, "foo(int)" and "foo(long)" both |
| 4591 | appear as "foo" in the index, for example. |
| 4592 | |
| 4593 | This means that the lookup names passed to the symbol name |
| 4594 | matcher functions must have no parameter information either |
| 4595 | because (e.g.) symbol search name "foo" does not match |
| 4596 | lookup-name "foo(int)" [while swapping search name for lookup |
| 4597 | name would match]. |
| 4598 | */ |
| 4599 | class gdb_index_symbol_name_matcher |
| 4600 | { |
| 4601 | public: |
| 4602 | /* Prepares the vector of comparison functions for LOOKUP_NAME. */ |
| 4603 | gdb_index_symbol_name_matcher (const lookup_name_info &lookup_name); |
| 4604 | |
| 4605 | /* Walk all the matcher routines and match SYMBOL_NAME against them. |
| 4606 | Returns true if any matcher matches. */ |
| 4607 | bool matches (const char *symbol_name); |
| 4608 | |
| 4609 | private: |
| 4610 | /* A reference to the lookup name we're matching against. */ |
| 4611 | const lookup_name_info &m_lookup_name; |
| 4612 | |
| 4613 | /* A vector holding all the different symbol name matchers, for all |
| 4614 | languages. */ |
| 4615 | std::vector<symbol_name_matcher_ftype *> m_symbol_name_matcher_funcs; |
| 4616 | }; |
| 4617 | |
| 4618 | gdb_index_symbol_name_matcher::gdb_index_symbol_name_matcher |
| 4619 | (const lookup_name_info &lookup_name) |
| 4620 | : m_lookup_name (lookup_name) |
| 4621 | { |
| 4622 | /* Prepare the vector of comparison functions upfront, to avoid |
| 4623 | doing the same work for each symbol. Care is taken to avoid |
| 4624 | matching with the same matcher more than once if/when multiple |
| 4625 | languages use the same matcher function. */ |
| 4626 | auto &matchers = m_symbol_name_matcher_funcs; |
| 4627 | matchers.reserve (nr_languages); |
| 4628 | |
| 4629 | matchers.push_back (default_symbol_name_matcher); |
| 4630 | |
| 4631 | for (int i = 0; i < nr_languages; i++) |
| 4632 | { |
| 4633 | const language_defn *lang = language_def ((enum language) i); |
| 4634 | symbol_name_matcher_ftype *name_matcher |
| 4635 | = get_symbol_name_matcher (lang, m_lookup_name); |
| 4636 | |
| 4637 | /* Don't insert the same comparison routine more than once. |
| 4638 | Note that we do this linear walk instead of a seemingly |
| 4639 | cheaper sorted insert, or use a std::set or something like |
| 4640 | that, because relative order of function addresses is not |
| 4641 | stable. This is not a problem in practice because the number |
| 4642 | of supported languages is low, and the cost here is tiny |
| 4643 | compared to the number of searches we'll do afterwards using |
| 4644 | this object. */ |
| 4645 | if (name_matcher != default_symbol_name_matcher |
| 4646 | && (std::find (matchers.begin (), matchers.end (), name_matcher) |
| 4647 | == matchers.end ())) |
| 4648 | matchers.push_back (name_matcher); |
| 4649 | } |
| 4650 | } |
| 4651 | |
| 4652 | bool |
| 4653 | gdb_index_symbol_name_matcher::matches (const char *symbol_name) |
| 4654 | { |
| 4655 | for (auto matches_name : m_symbol_name_matcher_funcs) |
| 4656 | if (matches_name (symbol_name, m_lookup_name, NULL)) |
| 4657 | return true; |
| 4658 | |
| 4659 | return false; |
| 4660 | } |
| 4661 | |
| 4662 | /* Starting from a search name, return the string that finds the upper |
| 4663 | bound of all strings that start with SEARCH_NAME in a sorted name |
| 4664 | list. Returns the empty string to indicate that the upper bound is |
| 4665 | the end of the list. */ |
| 4666 | |
| 4667 | static std::string |
| 4668 | make_sort_after_prefix_name (const char *search_name) |
| 4669 | { |
| 4670 | /* When looking to complete "func", we find the upper bound of all |
| 4671 | symbols that start with "func" by looking for where we'd insert |
| 4672 | the closest string that would follow "func" in lexicographical |
| 4673 | order. Usually, that's "func"-with-last-character-incremented, |
| 4674 | i.e. "fund". Mind non-ASCII characters, though. Usually those |
| 4675 | will be UTF-8 multi-byte sequences, but we can't be certain. |
| 4676 | Especially mind the 0xff character, which is a valid character in |
| 4677 | non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't |
| 4678 | rule out compilers allowing it in identifiers. Note that |
| 4679 | conveniently, strcmp/strcasecmp are specified to compare |
| 4680 | characters interpreted as unsigned char. So what we do is treat |
| 4681 | the whole string as a base 256 number composed of a sequence of |
| 4682 | base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps |
| 4683 | to 0, and carries 1 to the following more-significant position. |
| 4684 | If the very first character in SEARCH_NAME ends up incremented |
| 4685 | and carries/overflows, then the upper bound is the end of the |
| 4686 | list. The string after the empty string is also the empty |
| 4687 | string. |
| 4688 | |
| 4689 | Some examples of this operation: |
| 4690 | |
| 4691 | SEARCH_NAME => "+1" RESULT |
| 4692 | |
| 4693 | "abc" => "abd" |
| 4694 | "ab\xff" => "ac" |
| 4695 | "\xff" "a" "\xff" => "\xff" "b" |
| 4696 | "\xff" => "" |
| 4697 | "\xff\xff" => "" |
| 4698 | "" => "" |
| 4699 | |
| 4700 | Then, with these symbols for example: |
| 4701 | |
| 4702 | func |
| 4703 | func1 |
| 4704 | fund |
| 4705 | |
| 4706 | completing "func" looks for symbols between "func" and |
| 4707 | "func"-with-last-character-incremented, i.e. "fund" (exclusive), |
| 4708 | which finds "func" and "func1", but not "fund". |
| 4709 | |
| 4710 | And with: |
| 4711 | |
| 4712 | funcÿ (Latin1 'ÿ' [0xff]) |
| 4713 | funcÿ1 |
| 4714 | fund |
| 4715 | |
| 4716 | completing "funcÿ" looks for symbols between "funcÿ" and "fund" |
| 4717 | (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund". |
| 4718 | |
| 4719 | And with: |
| 4720 | |
| 4721 | ÿÿ (Latin1 'ÿ' [0xff]) |
| 4722 | ÿÿ1 |
| 4723 | |
| 4724 | completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and |
| 4725 | the end of the list. |
| 4726 | */ |
| 4727 | std::string after = search_name; |
| 4728 | while (!after.empty () && (unsigned char) after.back () == 0xff) |
| 4729 | after.pop_back (); |
| 4730 | if (!after.empty ()) |
| 4731 | after.back () = (unsigned char) after.back () + 1; |
| 4732 | return after; |
| 4733 | } |
| 4734 | |
| 4735 | /* See declaration. */ |
| 4736 | |
| 4737 | std::pair<std::vector<name_component>::const_iterator, |
| 4738 | std::vector<name_component>::const_iterator> |
| 4739 | mapped_index_base::find_name_components_bounds |
| 4740 | (const lookup_name_info &lookup_name_without_params) const |
| 4741 | { |
| 4742 | auto *name_cmp |
| 4743 | = this->name_components_casing == case_sensitive_on ? strcmp : strcasecmp; |
| 4744 | |
| 4745 | const char *cplus |
| 4746 | = lookup_name_without_params.cplus ().lookup_name ().c_str (); |
| 4747 | |
| 4748 | /* Comparison function object for lower_bound that matches against a |
| 4749 | given symbol name. */ |
| 4750 | auto lookup_compare_lower = [&] (const name_component &elem, |
| 4751 | const char *name) |
| 4752 | { |
| 4753 | const char *elem_qualified = this->symbol_name_at (elem.idx); |
| 4754 | const char *elem_name = elem_qualified + elem.name_offset; |
| 4755 | return name_cmp (elem_name, name) < 0; |
| 4756 | }; |
| 4757 | |
| 4758 | /* Comparison function object for upper_bound that matches against a |
| 4759 | given symbol name. */ |
| 4760 | auto lookup_compare_upper = [&] (const char *name, |
| 4761 | const name_component &elem) |
| 4762 | { |
| 4763 | const char *elem_qualified = this->symbol_name_at (elem.idx); |
| 4764 | const char *elem_name = elem_qualified + elem.name_offset; |
| 4765 | return name_cmp (name, elem_name) < 0; |
| 4766 | }; |
| 4767 | |
| 4768 | auto begin = this->name_components.begin (); |
| 4769 | auto end = this->name_components.end (); |
| 4770 | |
| 4771 | /* Find the lower bound. */ |
| 4772 | auto lower = [&] () |
| 4773 | { |
| 4774 | if (lookup_name_without_params.completion_mode () && cplus[0] == '\0') |
| 4775 | return begin; |
| 4776 | else |
| 4777 | return std::lower_bound (begin, end, cplus, lookup_compare_lower); |
| 4778 | } (); |
| 4779 | |
| 4780 | /* Find the upper bound. */ |
| 4781 | auto upper = [&] () |
| 4782 | { |
| 4783 | if (lookup_name_without_params.completion_mode ()) |
| 4784 | { |
| 4785 | /* In completion mode, we want UPPER to point past all |
| 4786 | symbols names that have the same prefix. I.e., with |
| 4787 | these symbols, and completing "func": |
| 4788 | |
| 4789 | function << lower bound |
| 4790 | function1 |
| 4791 | other_function << upper bound |
| 4792 | |
| 4793 | We find the upper bound by looking for the insertion |
| 4794 | point of "func"-with-last-character-incremented, |
| 4795 | i.e. "fund". */ |
| 4796 | std::string after = make_sort_after_prefix_name (cplus); |
| 4797 | if (after.empty ()) |
| 4798 | return end; |
| 4799 | return std::lower_bound (lower, end, after.c_str (), |
| 4800 | lookup_compare_lower); |
| 4801 | } |
| 4802 | else |
| 4803 | return std::upper_bound (lower, end, cplus, lookup_compare_upper); |
| 4804 | } (); |
| 4805 | |
| 4806 | return {lower, upper}; |
| 4807 | } |
| 4808 | |
| 4809 | /* See declaration. */ |
| 4810 | |
| 4811 | void |
| 4812 | mapped_index_base::build_name_components () |
| 4813 | { |
| 4814 | if (!this->name_components.empty ()) |
| 4815 | return; |
| 4816 | |
| 4817 | this->name_components_casing = case_sensitivity; |
| 4818 | auto *name_cmp |
| 4819 | = this->name_components_casing == case_sensitive_on ? strcmp : strcasecmp; |
| 4820 | |
| 4821 | /* The code below only knows how to break apart components of C++ |
| 4822 | symbol names (and other languages that use '::' as |
| 4823 | namespace/module separator). If we add support for wild matching |
| 4824 | to some language that uses some other operator (E.g., Ada, Go and |
| 4825 | D use '.'), then we'll need to try splitting the symbol name |
| 4826 | according to that language too. Note that Ada does support wild |
| 4827 | matching, but doesn't currently support .gdb_index. */ |
| 4828 | auto count = this->symbol_name_count (); |
| 4829 | for (offset_type idx = 0; idx < count; idx++) |
| 4830 | { |
| 4831 | if (this->symbol_name_slot_invalid (idx)) |
| 4832 | continue; |
| 4833 | |
| 4834 | const char *name = this->symbol_name_at (idx); |
| 4835 | |
| 4836 | /* Add each name component to the name component table. */ |
| 4837 | unsigned int previous_len = 0; |
| 4838 | for (unsigned int current_len = cp_find_first_component (name); |
| 4839 | name[current_len] != '\0'; |
| 4840 | current_len += cp_find_first_component (name + current_len)) |
| 4841 | { |
| 4842 | gdb_assert (name[current_len] == ':'); |
| 4843 | this->name_components.push_back ({previous_len, idx}); |
| 4844 | /* Skip the '::'. */ |
| 4845 | current_len += 2; |
| 4846 | previous_len = current_len; |
| 4847 | } |
| 4848 | this->name_components.push_back ({previous_len, idx}); |
| 4849 | } |
| 4850 | |
| 4851 | /* Sort name_components elements by name. */ |
| 4852 | auto name_comp_compare = [&] (const name_component &left, |
| 4853 | const name_component &right) |
| 4854 | { |
| 4855 | const char *left_qualified = this->symbol_name_at (left.idx); |
| 4856 | const char *right_qualified = this->symbol_name_at (right.idx); |
| 4857 | |
| 4858 | const char *left_name = left_qualified + left.name_offset; |
| 4859 | const char *right_name = right_qualified + right.name_offset; |
| 4860 | |
| 4861 | return name_cmp (left_name, right_name) < 0; |
| 4862 | }; |
| 4863 | |
| 4864 | std::sort (this->name_components.begin (), |
| 4865 | this->name_components.end (), |
| 4866 | name_comp_compare); |
| 4867 | } |
| 4868 | |
| 4869 | /* Helper for dw2_expand_symtabs_matching that works with a |
| 4870 | mapped_index_base instead of the containing objfile. This is split |
| 4871 | to a separate function in order to be able to unit test the |
| 4872 | name_components matching using a mock mapped_index_base. For each |
| 4873 | symbol name that matches, calls MATCH_CALLBACK, passing it the |
| 4874 | symbol's index in the mapped_index_base symbol table. */ |
| 4875 | |
| 4876 | static void |
| 4877 | dw2_expand_symtabs_matching_symbol |
| 4878 | (mapped_index_base &index, |
| 4879 | const lookup_name_info &lookup_name_in, |
| 4880 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, |
| 4881 | enum search_domain kind, |
| 4882 | gdb::function_view<void (offset_type)> match_callback) |
| 4883 | { |
| 4884 | lookup_name_info lookup_name_without_params |
| 4885 | = lookup_name_in.make_ignore_params (); |
| 4886 | gdb_index_symbol_name_matcher lookup_name_matcher |
| 4887 | (lookup_name_without_params); |
| 4888 | |
| 4889 | /* Build the symbol name component sorted vector, if we haven't |
| 4890 | yet. */ |
| 4891 | index.build_name_components (); |
| 4892 | |
| 4893 | auto bounds = index.find_name_components_bounds (lookup_name_without_params); |
| 4894 | |
| 4895 | /* Now for each symbol name in range, check to see if we have a name |
| 4896 | match, and if so, call the MATCH_CALLBACK callback. */ |
| 4897 | |
| 4898 | /* The same symbol may appear more than once in the range though. |
| 4899 | E.g., if we're looking for symbols that complete "w", and we have |
| 4900 | a symbol named "w1::w2", we'll find the two name components for |
| 4901 | that same symbol in the range. To be sure we only call the |
| 4902 | callback once per symbol, we first collect the symbol name |
| 4903 | indexes that matched in a temporary vector and ignore |
| 4904 | duplicates. */ |
| 4905 | std::vector<offset_type> matches; |
| 4906 | matches.reserve (std::distance (bounds.first, bounds.second)); |
| 4907 | |
| 4908 | for (; bounds.first != bounds.second; ++bounds.first) |
| 4909 | { |
| 4910 | const char *qualified = index.symbol_name_at (bounds.first->idx); |
| 4911 | |
| 4912 | if (!lookup_name_matcher.matches (qualified) |
| 4913 | || (symbol_matcher != NULL && !symbol_matcher (qualified))) |
| 4914 | continue; |
| 4915 | |
| 4916 | matches.push_back (bounds.first->idx); |
| 4917 | } |
| 4918 | |
| 4919 | std::sort (matches.begin (), matches.end ()); |
| 4920 | |
| 4921 | /* Finally call the callback, once per match. */ |
| 4922 | ULONGEST prev = -1; |
| 4923 | for (offset_type idx : matches) |
| 4924 | { |
| 4925 | if (prev != idx) |
| 4926 | { |
| 4927 | match_callback (idx); |
| 4928 | prev = idx; |
| 4929 | } |
| 4930 | } |
| 4931 | |
| 4932 | /* Above we use a type wider than idx's for 'prev', since 0 and |
| 4933 | (offset_type)-1 are both possible values. */ |
| 4934 | static_assert (sizeof (prev) > sizeof (offset_type), ""); |
| 4935 | } |
| 4936 | |
| 4937 | #if GDB_SELF_TEST |
| 4938 | |
| 4939 | namespace selftests { namespace dw2_expand_symtabs_matching { |
| 4940 | |
| 4941 | /* A mock .gdb_index/.debug_names-like name index table, enough to |
| 4942 | exercise dw2_expand_symtabs_matching_symbol, which works with the |
| 4943 | mapped_index_base interface. Builds an index from the symbol list |
| 4944 | passed as parameter to the constructor. */ |
| 4945 | class mock_mapped_index : public mapped_index_base |
| 4946 | { |
| 4947 | public: |
| 4948 | mock_mapped_index (gdb::array_view<const char *> symbols) |
| 4949 | : m_symbol_table (symbols) |
| 4950 | {} |
| 4951 | |
| 4952 | DISABLE_COPY_AND_ASSIGN (mock_mapped_index); |
| 4953 | |
| 4954 | /* Return the number of names in the symbol table. */ |
| 4955 | virtual size_t symbol_name_count () const |
| 4956 | { |
| 4957 | return m_symbol_table.size (); |
| 4958 | } |
| 4959 | |
| 4960 | /* Get the name of the symbol at IDX in the symbol table. */ |
| 4961 | virtual const char *symbol_name_at (offset_type idx) const |
| 4962 | { |
| 4963 | return m_symbol_table[idx]; |
| 4964 | } |
| 4965 | |
| 4966 | private: |
| 4967 | gdb::array_view<const char *> m_symbol_table; |
| 4968 | }; |
| 4969 | |
| 4970 | /* Convenience function that converts a NULL pointer to a "<null>" |
| 4971 | string, to pass to print routines. */ |
| 4972 | |
| 4973 | static const char * |
| 4974 | string_or_null (const char *str) |
| 4975 | { |
| 4976 | return str != NULL ? str : "<null>"; |
| 4977 | } |
| 4978 | |
| 4979 | /* Check if a lookup_name_info built from |
| 4980 | NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock |
| 4981 | index. EXPECTED_LIST is the list of expected matches, in expected |
| 4982 | matching order. If no match expected, then an empty list is |
| 4983 | specified. Returns true on success. On failure prints a warning |
| 4984 | indicating the file:line that failed, and returns false. */ |
| 4985 | |
| 4986 | static bool |
| 4987 | check_match (const char *file, int line, |
| 4988 | mock_mapped_index &mock_index, |
| 4989 | const char *name, symbol_name_match_type match_type, |
| 4990 | bool completion_mode, |
| 4991 | std::initializer_list<const char *> expected_list) |
| 4992 | { |
| 4993 | lookup_name_info lookup_name (name, match_type, completion_mode); |
| 4994 | |
| 4995 | bool matched = true; |
| 4996 | |
| 4997 | auto mismatch = [&] (const char *expected_str, |
| 4998 | const char *got) |
| 4999 | { |
| 5000 | warning (_("%s:%d: match_type=%s, looking-for=\"%s\", " |
| 5001 | "expected=\"%s\", got=\"%s\"\n"), |
| 5002 | file, line, |
| 5003 | (match_type == symbol_name_match_type::FULL |
| 5004 | ? "FULL" : "WILD"), |
| 5005 | name, string_or_null (expected_str), string_or_null (got)); |
| 5006 | matched = false; |
| 5007 | }; |
| 5008 | |
| 5009 | auto expected_it = expected_list.begin (); |
| 5010 | auto expected_end = expected_list.end (); |
| 5011 | |
| 5012 | dw2_expand_symtabs_matching_symbol (mock_index, lookup_name, |
| 5013 | NULL, ALL_DOMAIN, |
| 5014 | [&] (offset_type idx) |
| 5015 | { |
| 5016 | const char *matched_name = mock_index.symbol_name_at (idx); |
| 5017 | const char *expected_str |
| 5018 | = expected_it == expected_end ? NULL : *expected_it++; |
| 5019 | |
| 5020 | if (expected_str == NULL || strcmp (expected_str, matched_name) != 0) |
| 5021 | mismatch (expected_str, matched_name); |
| 5022 | }); |
| 5023 | |
| 5024 | const char *expected_str |
| 5025 | = expected_it == expected_end ? NULL : *expected_it++; |
| 5026 | if (expected_str != NULL) |
| 5027 | mismatch (expected_str, NULL); |
| 5028 | |
| 5029 | return matched; |
| 5030 | } |
| 5031 | |
| 5032 | /* The symbols added to the mock mapped_index for testing (in |
| 5033 | canonical form). */ |
| 5034 | static const char *test_symbols[] = { |
| 5035 | "function", |
| 5036 | "std::bar", |
| 5037 | "std::zfunction", |
| 5038 | "std::zfunction2", |
| 5039 | "w1::w2", |
| 5040 | "ns::foo<char*>", |
| 5041 | "ns::foo<int>", |
| 5042 | "ns::foo<long>", |
| 5043 | "ns2::tmpl<int>::foo2", |
| 5044 | "(anonymous namespace)::A::B::C", |
| 5045 | |
| 5046 | /* These are used to check that the increment-last-char in the |
| 5047 | matching algorithm for completion doesn't match "t1_fund" when |
| 5048 | completing "t1_func". */ |
| 5049 | "t1_func", |
| 5050 | "t1_func1", |
| 5051 | "t1_fund", |
| 5052 | "t1_fund1", |
| 5053 | |
| 5054 | /* A UTF-8 name with multi-byte sequences to make sure that |
| 5055 | cp-name-parser understands this as a single identifier ("função" |
| 5056 | is "function" in PT). */ |
| 5057 | u8"u8função", |
| 5058 | |
| 5059 | /* \377 (0xff) is Latin1 'ÿ'. */ |
| 5060 | "yfunc\377", |
| 5061 | |
| 5062 | /* \377 (0xff) is Latin1 'ÿ'. */ |
| 5063 | "\377", |
| 5064 | "\377\377123", |
| 5065 | |
| 5066 | /* A name with all sorts of complications. Starts with "z" to make |
| 5067 | it easier for the completion tests below. */ |
| 5068 | #define Z_SYM_NAME \ |
| 5069 | "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \ |
| 5070 | "::tuple<(anonymous namespace)::ui*, " \ |
| 5071 | "std::default_delete<(anonymous namespace)::ui>, void>" |
| 5072 | |
| 5073 | Z_SYM_NAME |
| 5074 | }; |
| 5075 | |
| 5076 | /* Returns true if the mapped_index_base::find_name_component_bounds |
| 5077 | method finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME, |
| 5078 | in completion mode. */ |
| 5079 | |
| 5080 | static bool |
| 5081 | check_find_bounds_finds (mapped_index_base &index, |
| 5082 | const char *search_name, |
| 5083 | gdb::array_view<const char *> expected_syms) |
| 5084 | { |
| 5085 | lookup_name_info lookup_name (search_name, |
| 5086 | symbol_name_match_type::FULL, true); |
| 5087 | |
| 5088 | auto bounds = index.find_name_components_bounds (lookup_name); |
| 5089 | |
| 5090 | size_t distance = std::distance (bounds.first, bounds.second); |
| 5091 | if (distance != expected_syms.size ()) |
| 5092 | return false; |
| 5093 | |
| 5094 | for (size_t exp_elem = 0; exp_elem < distance; exp_elem++) |
| 5095 | { |
| 5096 | auto nc_elem = bounds.first + exp_elem; |
| 5097 | const char *qualified = index.symbol_name_at (nc_elem->idx); |
| 5098 | if (strcmp (qualified, expected_syms[exp_elem]) != 0) |
| 5099 | return false; |
| 5100 | } |
| 5101 | |
| 5102 | return true; |
| 5103 | } |
| 5104 | |
| 5105 | /* Test the lower-level mapped_index::find_name_component_bounds |
| 5106 | method. */ |
| 5107 | |
| 5108 | static void |
| 5109 | test_mapped_index_find_name_component_bounds () |
| 5110 | { |
| 5111 | mock_mapped_index mock_index (test_symbols); |
| 5112 | |
| 5113 | mock_index.build_name_components (); |
| 5114 | |
| 5115 | /* Test the lower-level mapped_index::find_name_component_bounds |
| 5116 | method in completion mode. */ |
| 5117 | { |
| 5118 | static const char *expected_syms[] = { |
| 5119 | "t1_func", |
| 5120 | "t1_func1", |
| 5121 | }; |
| 5122 | |
| 5123 | SELF_CHECK (check_find_bounds_finds (mock_index, |
| 5124 | "t1_func", expected_syms)); |
| 5125 | } |
| 5126 | |
| 5127 | /* Check that the increment-last-char in the name matching algorithm |
| 5128 | for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */ |
| 5129 | { |
| 5130 | static const char *expected_syms1[] = { |
| 5131 | "\377", |
| 5132 | "\377\377123", |
| 5133 | }; |
| 5134 | SELF_CHECK (check_find_bounds_finds (mock_index, |
| 5135 | "\377", expected_syms1)); |
| 5136 | |
| 5137 | static const char *expected_syms2[] = { |
| 5138 | "\377\377123", |
| 5139 | }; |
| 5140 | SELF_CHECK (check_find_bounds_finds (mock_index, |
| 5141 | "\377\377", expected_syms2)); |
| 5142 | } |
| 5143 | } |
| 5144 | |
| 5145 | /* Test dw2_expand_symtabs_matching_symbol. */ |
| 5146 | |
| 5147 | static void |
| 5148 | test_dw2_expand_symtabs_matching_symbol () |
| 5149 | { |
| 5150 | mock_mapped_index mock_index (test_symbols); |
| 5151 | |
| 5152 | /* We let all tests run until the end even if some fails, for debug |
| 5153 | convenience. */ |
| 5154 | bool any_mismatch = false; |
| 5155 | |
| 5156 | /* Create the expected symbols list (an initializer_list). Needed |
| 5157 | because lists have commas, and we need to pass them to CHECK, |
| 5158 | which is a macro. */ |
| 5159 | #define EXPECT(...) { __VA_ARGS__ } |
| 5160 | |
| 5161 | /* Wrapper for check_match that passes down the current |
| 5162 | __FILE__/__LINE__. */ |
| 5163 | #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \ |
| 5164 | any_mismatch |= !check_match (__FILE__, __LINE__, \ |
| 5165 | mock_index, \ |
| 5166 | NAME, MATCH_TYPE, COMPLETION_MODE, \ |
| 5167 | EXPECTED_LIST) |
| 5168 | |
| 5169 | /* Identity checks. */ |
| 5170 | for (const char *sym : test_symbols) |
| 5171 | { |
| 5172 | /* Should be able to match all existing symbols. */ |
| 5173 | CHECK_MATCH (sym, symbol_name_match_type::FULL, false, |
| 5174 | EXPECT (sym)); |
| 5175 | |
| 5176 | /* Should be able to match all existing symbols with |
| 5177 | parameters. */ |
| 5178 | std::string with_params = std::string (sym) + "(int)"; |
| 5179 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, |
| 5180 | EXPECT (sym)); |
| 5181 | |
| 5182 | /* Should be able to match all existing symbols with |
| 5183 | parameters and qualifiers. */ |
| 5184 | with_params = std::string (sym) + " ( int ) const"; |
| 5185 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, |
| 5186 | EXPECT (sym)); |
| 5187 | |
| 5188 | /* This should really find sym, but cp-name-parser.y doesn't |
| 5189 | know about lvalue/rvalue qualifiers yet. */ |
| 5190 | with_params = std::string (sym) + " ( int ) &&"; |
| 5191 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, |
| 5192 | {}); |
| 5193 | } |
| 5194 | |
| 5195 | /* Check that the name matching algorithm for completion doesn't get |
| 5196 | confused with Latin1 'ÿ' / 0xff. */ |
| 5197 | { |
| 5198 | static const char str[] = "\377"; |
| 5199 | CHECK_MATCH (str, symbol_name_match_type::FULL, true, |
| 5200 | EXPECT ("\377", "\377\377123")); |
| 5201 | } |
| 5202 | |
| 5203 | /* Check that the increment-last-char in the matching algorithm for |
| 5204 | completion doesn't match "t1_fund" when completing "t1_func". */ |
| 5205 | { |
| 5206 | static const char str[] = "t1_func"; |
| 5207 | CHECK_MATCH (str, symbol_name_match_type::FULL, true, |
| 5208 | EXPECT ("t1_func", "t1_func1")); |
| 5209 | } |
| 5210 | |
| 5211 | /* Check that completion mode works at each prefix of the expected |
| 5212 | symbol name. */ |
| 5213 | { |
| 5214 | static const char str[] = "function(int)"; |
| 5215 | size_t len = strlen (str); |
| 5216 | std::string lookup; |
| 5217 | |
| 5218 | for (size_t i = 1; i < len; i++) |
| 5219 | { |
| 5220 | lookup.assign (str, i); |
| 5221 | CHECK_MATCH (lookup.c_str (), symbol_name_match_type::FULL, true, |
| 5222 | EXPECT ("function")); |
| 5223 | } |
| 5224 | } |
| 5225 | |
| 5226 | /* While "w" is a prefix of both components, the match function |
| 5227 | should still only be called once. */ |
| 5228 | { |
| 5229 | CHECK_MATCH ("w", symbol_name_match_type::FULL, true, |
| 5230 | EXPECT ("w1::w2")); |
| 5231 | CHECK_MATCH ("w", symbol_name_match_type::WILD, true, |
| 5232 | EXPECT ("w1::w2")); |
| 5233 | } |
| 5234 | |
| 5235 | /* Same, with a "complicated" symbol. */ |
| 5236 | { |
| 5237 | static const char str[] = Z_SYM_NAME; |
| 5238 | size_t len = strlen (str); |
| 5239 | std::string lookup; |
| 5240 | |
| 5241 | for (size_t i = 1; i < len; i++) |
| 5242 | { |
| 5243 | lookup.assign (str, i); |
| 5244 | CHECK_MATCH (lookup.c_str (), symbol_name_match_type::FULL, true, |
| 5245 | EXPECT (Z_SYM_NAME)); |
| 5246 | } |
| 5247 | } |
| 5248 | |
| 5249 | /* In FULL mode, an incomplete symbol doesn't match. */ |
| 5250 | { |
| 5251 | CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL, false, |
| 5252 | {}); |
| 5253 | } |
| 5254 | |
| 5255 | /* A complete symbol with parameters matches any overload, since the |
| 5256 | index has no overload info. */ |
| 5257 | { |
| 5258 | CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL, true, |
| 5259 | EXPECT ("std::zfunction", "std::zfunction2")); |
| 5260 | CHECK_MATCH ("zfunction(int)", symbol_name_match_type::WILD, true, |
| 5261 | EXPECT ("std::zfunction", "std::zfunction2")); |
| 5262 | CHECK_MATCH ("zfunc", symbol_name_match_type::WILD, true, |
| 5263 | EXPECT ("std::zfunction", "std::zfunction2")); |
| 5264 | } |
| 5265 | |
| 5266 | /* Check that whitespace is ignored appropriately. A symbol with a |
| 5267 | template argument list. */ |
| 5268 | { |
| 5269 | static const char expected[] = "ns::foo<int>"; |
| 5270 | CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL, false, |
| 5271 | EXPECT (expected)); |
| 5272 | CHECK_MATCH ("foo < int > ", symbol_name_match_type::WILD, false, |
| 5273 | EXPECT (expected)); |
| 5274 | } |
| 5275 | |
| 5276 | /* Check that whitespace is ignored appropriately. A symbol with a |
| 5277 | template argument list that includes a pointer. */ |
| 5278 | { |
| 5279 | static const char expected[] = "ns::foo<char*>"; |
| 5280 | /* Try both completion and non-completion modes. */ |
| 5281 | static const bool completion_mode[2] = {false, true}; |
| 5282 | for (size_t i = 0; i < 2; i++) |
| 5283 | { |
| 5284 | CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL, |
| 5285 | completion_mode[i], EXPECT (expected)); |
| 5286 | CHECK_MATCH ("foo < char * >", symbol_name_match_type::WILD, |
| 5287 | completion_mode[i], EXPECT (expected)); |
| 5288 | |
| 5289 | CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL, |
| 5290 | completion_mode[i], EXPECT (expected)); |
| 5291 | CHECK_MATCH ("foo < char * > (int)", symbol_name_match_type::WILD, |
| 5292 | completion_mode[i], EXPECT (expected)); |
| 5293 | } |
| 5294 | } |
| 5295 | |
| 5296 | { |
| 5297 | /* Check method qualifiers are ignored. */ |
| 5298 | static const char expected[] = "ns::foo<char*>"; |
| 5299 | CHECK_MATCH ("ns :: foo < char * > ( int ) const", |
| 5300 | symbol_name_match_type::FULL, true, EXPECT (expected)); |
| 5301 | CHECK_MATCH ("ns :: foo < char * > ( int ) &&", |
| 5302 | symbol_name_match_type::FULL, true, EXPECT (expected)); |
| 5303 | CHECK_MATCH ("foo < char * > ( int ) const", |
| 5304 | symbol_name_match_type::WILD, true, EXPECT (expected)); |
| 5305 | CHECK_MATCH ("foo < char * > ( int ) &&", |
| 5306 | symbol_name_match_type::WILD, true, EXPECT (expected)); |
| 5307 | } |
| 5308 | |
| 5309 | /* Test lookup names that don't match anything. */ |
| 5310 | { |
| 5311 | CHECK_MATCH ("bar2", symbol_name_match_type::WILD, false, |
| 5312 | {}); |
| 5313 | |
| 5314 | CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL, false, |
| 5315 | {}); |
| 5316 | } |
| 5317 | |
| 5318 | /* Some wild matching tests, exercising "(anonymous namespace)", |
| 5319 | which should not be confused with a parameter list. */ |
| 5320 | { |
| 5321 | static const char *syms[] = { |
| 5322 | "A::B::C", |
| 5323 | "B::C", |
| 5324 | "C", |
| 5325 | "A :: B :: C ( int )", |
| 5326 | "B :: C ( int )", |
| 5327 | "C ( int )", |
| 5328 | }; |
| 5329 | |
| 5330 | for (const char *s : syms) |
| 5331 | { |
| 5332 | CHECK_MATCH (s, symbol_name_match_type::WILD, false, |
| 5333 | EXPECT ("(anonymous namespace)::A::B::C")); |
| 5334 | } |
| 5335 | } |
| 5336 | |
| 5337 | { |
| 5338 | static const char expected[] = "ns2::tmpl<int>::foo2"; |
| 5339 | CHECK_MATCH ("tmp", symbol_name_match_type::WILD, true, |
| 5340 | EXPECT (expected)); |
| 5341 | CHECK_MATCH ("tmpl<", symbol_name_match_type::WILD, true, |
| 5342 | EXPECT (expected)); |
| 5343 | } |
| 5344 | |
| 5345 | SELF_CHECK (!any_mismatch); |
| 5346 | |
| 5347 | #undef EXPECT |
| 5348 | #undef CHECK_MATCH |
| 5349 | } |
| 5350 | |
| 5351 | static void |
| 5352 | run_test () |
| 5353 | { |
| 5354 | test_mapped_index_find_name_component_bounds (); |
| 5355 | test_dw2_expand_symtabs_matching_symbol (); |
| 5356 | } |
| 5357 | |
| 5358 | }} // namespace selftests::dw2_expand_symtabs_matching |
| 5359 | |
| 5360 | #endif /* GDB_SELF_TEST */ |
| 5361 | |
| 5362 | /* If FILE_MATCHER is NULL or if PER_CU has |
| 5363 | dwarf2_per_cu_quick_data::MARK set (see |
| 5364 | dw_expand_symtabs_matching_file_matcher), expand the CU and call |
| 5365 | EXPANSION_NOTIFY on it. */ |
| 5366 | |
| 5367 | static void |
| 5368 | dw2_expand_symtabs_matching_one |
| 5369 | (struct dwarf2_per_cu_data *per_cu, |
| 5370 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, |
| 5371 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify) |
| 5372 | { |
| 5373 | if (file_matcher == NULL || per_cu->v.quick->mark) |
| 5374 | { |
| 5375 | bool symtab_was_null |
| 5376 | = (per_cu->v.quick->compunit_symtab == NULL); |
| 5377 | |
| 5378 | dw2_instantiate_symtab (per_cu); |
| 5379 | |
| 5380 | if (expansion_notify != NULL |
| 5381 | && symtab_was_null |
| 5382 | && per_cu->v.quick->compunit_symtab != NULL) |
| 5383 | expansion_notify (per_cu->v.quick->compunit_symtab); |
| 5384 | } |
| 5385 | } |
| 5386 | |
| 5387 | /* Helper for dw2_expand_matching symtabs. Called on each symbol |
| 5388 | matched, to expand corresponding CUs that were marked. IDX is the |
| 5389 | index of the symbol name that matched. */ |
| 5390 | |
| 5391 | static void |
| 5392 | dw2_expand_marked_cus |
| 5393 | (struct dwarf2_per_objfile *dwarf2_per_objfile, offset_type idx, |
| 5394 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, |
| 5395 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, |
| 5396 | search_domain kind) |
| 5397 | { |
| 5398 | offset_type *vec, vec_len, vec_idx; |
| 5399 | bool global_seen = false; |
| 5400 | mapped_index &index = *dwarf2_per_objfile->index_table; |
| 5401 | |
| 5402 | vec = (offset_type *) (index.constant_pool |
| 5403 | + MAYBE_SWAP (index.symbol_table[idx].vec)); |
| 5404 | vec_len = MAYBE_SWAP (vec[0]); |
| 5405 | for (vec_idx = 0; vec_idx < vec_len; ++vec_idx) |
| 5406 | { |
| 5407 | struct dwarf2_per_cu_data *per_cu; |
| 5408 | offset_type cu_index_and_attrs = MAYBE_SWAP (vec[vec_idx + 1]); |
| 5409 | /* This value is only valid for index versions >= 7. */ |
| 5410 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); |
| 5411 | gdb_index_symbol_kind symbol_kind = |
| 5412 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); |
| 5413 | int cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); |
| 5414 | /* Only check the symbol attributes if they're present. |
| 5415 | Indices prior to version 7 don't record them, |
| 5416 | and indices >= 7 may elide them for certain symbols |
| 5417 | (gold does this). */ |
| 5418 | int attrs_valid = |
| 5419 | (index.version >= 7 |
| 5420 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); |
| 5421 | |
| 5422 | /* Work around gold/15646. */ |
| 5423 | if (attrs_valid) |
| 5424 | { |
| 5425 | if (!is_static && global_seen) |
| 5426 | continue; |
| 5427 | if (!is_static) |
| 5428 | global_seen = true; |
| 5429 | } |
| 5430 | |
| 5431 | /* Only check the symbol's kind if it has one. */ |
| 5432 | if (attrs_valid) |
| 5433 | { |
| 5434 | switch (kind) |
| 5435 | { |
| 5436 | case VARIABLES_DOMAIN: |
| 5437 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE) |
| 5438 | continue; |
| 5439 | break; |
| 5440 | case FUNCTIONS_DOMAIN: |
| 5441 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION) |
| 5442 | continue; |
| 5443 | break; |
| 5444 | case TYPES_DOMAIN: |
| 5445 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) |
| 5446 | continue; |
| 5447 | break; |
| 5448 | default: |
| 5449 | break; |
| 5450 | } |
| 5451 | } |
| 5452 | |
| 5453 | /* Don't crash on bad data. */ |
| 5454 | if (cu_index >= (dwarf2_per_objfile->n_comp_units |
| 5455 | + dwarf2_per_objfile->n_type_units)) |
| 5456 | { |
| 5457 | complaint (&symfile_complaints, |
| 5458 | _(".gdb_index entry has bad CU index" |
| 5459 | " [in module %s]"), |
| 5460 | objfile_name (dwarf2_per_objfile->objfile)); |
| 5461 | continue; |
| 5462 | } |
| 5463 | |
| 5464 | per_cu = dw2_get_cutu (dwarf2_per_objfile, cu_index); |
| 5465 | dw2_expand_symtabs_matching_one (per_cu, file_matcher, |
| 5466 | expansion_notify); |
| 5467 | } |
| 5468 | } |
| 5469 | |
| 5470 | /* If FILE_MATCHER is non-NULL, set all the |
| 5471 | dwarf2_per_cu_quick_data::MARK of the current DWARF2_PER_OBJFILE |
| 5472 | that match FILE_MATCHER. */ |
| 5473 | |
| 5474 | static void |
| 5475 | dw_expand_symtabs_matching_file_matcher |
| 5476 | (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 5477 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher) |
| 5478 | { |
| 5479 | if (file_matcher == NULL) |
| 5480 | return; |
| 5481 | |
| 5482 | objfile *const objfile = dwarf2_per_objfile->objfile; |
| 5483 | |
| 5484 | htab_up visited_found (htab_create_alloc (10, htab_hash_pointer, |
| 5485 | htab_eq_pointer, |
| 5486 | NULL, xcalloc, xfree)); |
| 5487 | htab_up visited_not_found (htab_create_alloc (10, htab_hash_pointer, |
| 5488 | htab_eq_pointer, |
| 5489 | NULL, xcalloc, xfree)); |
| 5490 | |
| 5491 | /* The rule is CUs specify all the files, including those used by |
| 5492 | any TU, so there's no need to scan TUs here. */ |
| 5493 | |
| 5494 | for (int i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
| 5495 | { |
| 5496 | int j; |
| 5497 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (dwarf2_per_objfile, i); |
| 5498 | struct quick_file_names *file_data; |
| 5499 | void **slot; |
| 5500 | |
| 5501 | QUIT; |
| 5502 | |
| 5503 | per_cu->v.quick->mark = 0; |
| 5504 | |
| 5505 | /* We only need to look at symtabs not already expanded. */ |
| 5506 | if (per_cu->v.quick->compunit_symtab) |
| 5507 | continue; |
| 5508 | |
| 5509 | file_data = dw2_get_file_names (per_cu); |
| 5510 | if (file_data == NULL) |
| 5511 | continue; |
| 5512 | |
| 5513 | if (htab_find (visited_not_found.get (), file_data) != NULL) |
| 5514 | continue; |
| 5515 | else if (htab_find (visited_found.get (), file_data) != NULL) |
| 5516 | { |
| 5517 | per_cu->v.quick->mark = 1; |
| 5518 | continue; |
| 5519 | } |
| 5520 | |
| 5521 | for (j = 0; j < file_data->num_file_names; ++j) |
| 5522 | { |
| 5523 | const char *this_real_name; |
| 5524 | |
| 5525 | if (file_matcher (file_data->file_names[j], false)) |
| 5526 | { |
| 5527 | per_cu->v.quick->mark = 1; |
| 5528 | break; |
| 5529 | } |
| 5530 | |
| 5531 | /* Before we invoke realpath, which can get expensive when many |
| 5532 | files are involved, do a quick comparison of the basenames. */ |
| 5533 | if (!basenames_may_differ |
| 5534 | && !file_matcher (lbasename (file_data->file_names[j]), |
| 5535 | true)) |
| 5536 | continue; |
| 5537 | |
| 5538 | this_real_name = dw2_get_real_path (objfile, file_data, j); |
| 5539 | if (file_matcher (this_real_name, false)) |
| 5540 | { |
| 5541 | per_cu->v.quick->mark = 1; |
| 5542 | break; |
| 5543 | } |
| 5544 | } |
| 5545 | |
| 5546 | slot = htab_find_slot (per_cu->v.quick->mark |
| 5547 | ? visited_found.get () |
| 5548 | : visited_not_found.get (), |
| 5549 | file_data, INSERT); |
| 5550 | *slot = file_data; |
| 5551 | } |
| 5552 | } |
| 5553 | |
| 5554 | static void |
| 5555 | dw2_expand_symtabs_matching |
| 5556 | (struct objfile *objfile, |
| 5557 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, |
| 5558 | const lookup_name_info &lookup_name, |
| 5559 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, |
| 5560 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, |
| 5561 | enum search_domain kind) |
| 5562 | { |
| 5563 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 5564 | = get_dwarf2_per_objfile (objfile); |
| 5565 | |
| 5566 | /* index_table is NULL if OBJF_READNOW. */ |
| 5567 | if (!dwarf2_per_objfile->index_table) |
| 5568 | return; |
| 5569 | |
| 5570 | dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile, file_matcher); |
| 5571 | |
| 5572 | mapped_index &index = *dwarf2_per_objfile->index_table; |
| 5573 | |
| 5574 | dw2_expand_symtabs_matching_symbol (index, lookup_name, |
| 5575 | symbol_matcher, |
| 5576 | kind, [&] (offset_type idx) |
| 5577 | { |
| 5578 | dw2_expand_marked_cus (dwarf2_per_objfile, idx, file_matcher, |
| 5579 | expansion_notify, kind); |
| 5580 | }); |
| 5581 | } |
| 5582 | |
| 5583 | /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific |
| 5584 | symtab. */ |
| 5585 | |
| 5586 | static struct compunit_symtab * |
| 5587 | recursively_find_pc_sect_compunit_symtab (struct compunit_symtab *cust, |
| 5588 | CORE_ADDR pc) |
| 5589 | { |
| 5590 | int i; |
| 5591 | |
| 5592 | if (COMPUNIT_BLOCKVECTOR (cust) != NULL |
| 5593 | && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust), pc)) |
| 5594 | return cust; |
| 5595 | |
| 5596 | if (cust->includes == NULL) |
| 5597 | return NULL; |
| 5598 | |
| 5599 | for (i = 0; cust->includes[i]; ++i) |
| 5600 | { |
| 5601 | struct compunit_symtab *s = cust->includes[i]; |
| 5602 | |
| 5603 | s = recursively_find_pc_sect_compunit_symtab (s, pc); |
| 5604 | if (s != NULL) |
| 5605 | return s; |
| 5606 | } |
| 5607 | |
| 5608 | return NULL; |
| 5609 | } |
| 5610 | |
| 5611 | static struct compunit_symtab * |
| 5612 | dw2_find_pc_sect_compunit_symtab (struct objfile *objfile, |
| 5613 | struct bound_minimal_symbol msymbol, |
| 5614 | CORE_ADDR pc, |
| 5615 | struct obj_section *section, |
| 5616 | int warn_if_readin) |
| 5617 | { |
| 5618 | struct dwarf2_per_cu_data *data; |
| 5619 | struct compunit_symtab *result; |
| 5620 | |
| 5621 | if (!objfile->psymtabs_addrmap) |
| 5622 | return NULL; |
| 5623 | |
| 5624 | data = (struct dwarf2_per_cu_data *) addrmap_find (objfile->psymtabs_addrmap, |
| 5625 | pc); |
| 5626 | if (!data) |
| 5627 | return NULL; |
| 5628 | |
| 5629 | if (warn_if_readin && data->v.quick->compunit_symtab) |
| 5630 | warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"), |
| 5631 | paddress (get_objfile_arch (objfile), pc)); |
| 5632 | |
| 5633 | result |
| 5634 | = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data), |
| 5635 | pc); |
| 5636 | gdb_assert (result != NULL); |
| 5637 | return result; |
| 5638 | } |
| 5639 | |
| 5640 | static void |
| 5641 | dw2_map_symbol_filenames (struct objfile *objfile, symbol_filename_ftype *fun, |
| 5642 | void *data, int need_fullname) |
| 5643 | { |
| 5644 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 5645 | = get_dwarf2_per_objfile (objfile); |
| 5646 | |
| 5647 | if (!dwarf2_per_objfile->filenames_cache) |
| 5648 | { |
| 5649 | dwarf2_per_objfile->filenames_cache.emplace (); |
| 5650 | |
| 5651 | htab_up visited (htab_create_alloc (10, |
| 5652 | htab_hash_pointer, htab_eq_pointer, |
| 5653 | NULL, xcalloc, xfree)); |
| 5654 | |
| 5655 | /* The rule is CUs specify all the files, including those used |
| 5656 | by any TU, so there's no need to scan TUs here. We can |
| 5657 | ignore file names coming from already-expanded CUs. */ |
| 5658 | |
| 5659 | for (int i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
| 5660 | { |
| 5661 | dwarf2_per_cu_data *per_cu = dw2_get_cutu (dwarf2_per_objfile, i); |
| 5662 | |
| 5663 | if (per_cu->v.quick->compunit_symtab) |
| 5664 | { |
| 5665 | void **slot = htab_find_slot (visited.get (), |
| 5666 | per_cu->v.quick->file_names, |
| 5667 | INSERT); |
| 5668 | |
| 5669 | *slot = per_cu->v.quick->file_names; |
| 5670 | } |
| 5671 | } |
| 5672 | |
| 5673 | for (int i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
| 5674 | { |
| 5675 | dwarf2_per_cu_data *per_cu = dw2_get_cu (dwarf2_per_objfile, i); |
| 5676 | struct quick_file_names *file_data; |
| 5677 | void **slot; |
| 5678 | |
| 5679 | /* We only need to look at symtabs not already expanded. */ |
| 5680 | if (per_cu->v.quick->compunit_symtab) |
| 5681 | continue; |
| 5682 | |
| 5683 | file_data = dw2_get_file_names (per_cu); |
| 5684 | if (file_data == NULL) |
| 5685 | continue; |
| 5686 | |
| 5687 | slot = htab_find_slot (visited.get (), file_data, INSERT); |
| 5688 | if (*slot) |
| 5689 | { |
| 5690 | /* Already visited. */ |
| 5691 | continue; |
| 5692 | } |
| 5693 | *slot = file_data; |
| 5694 | |
| 5695 | for (int j = 0; j < file_data->num_file_names; ++j) |
| 5696 | { |
| 5697 | const char *filename = file_data->file_names[j]; |
| 5698 | dwarf2_per_objfile->filenames_cache->seen (filename); |
| 5699 | } |
| 5700 | } |
| 5701 | } |
| 5702 | |
| 5703 | dwarf2_per_objfile->filenames_cache->traverse ([&] (const char *filename) |
| 5704 | { |
| 5705 | gdb::unique_xmalloc_ptr<char> this_real_name; |
| 5706 | |
| 5707 | if (need_fullname) |
| 5708 | this_real_name = gdb_realpath (filename); |
| 5709 | (*fun) (filename, this_real_name.get (), data); |
| 5710 | }); |
| 5711 | } |
| 5712 | |
| 5713 | static int |
| 5714 | dw2_has_symbols (struct objfile *objfile) |
| 5715 | { |
| 5716 | return 1; |
| 5717 | } |
| 5718 | |
| 5719 | const struct quick_symbol_functions dwarf2_gdb_index_functions = |
| 5720 | { |
| 5721 | dw2_has_symbols, |
| 5722 | dw2_find_last_source_symtab, |
| 5723 | dw2_forget_cached_source_info, |
| 5724 | dw2_map_symtabs_matching_filename, |
| 5725 | dw2_lookup_symbol, |
| 5726 | dw2_print_stats, |
| 5727 | dw2_dump, |
| 5728 | dw2_relocate, |
| 5729 | dw2_expand_symtabs_for_function, |
| 5730 | dw2_expand_all_symtabs, |
| 5731 | dw2_expand_symtabs_with_fullname, |
| 5732 | dw2_map_matching_symbols, |
| 5733 | dw2_expand_symtabs_matching, |
| 5734 | dw2_find_pc_sect_compunit_symtab, |
| 5735 | NULL, |
| 5736 | dw2_map_symbol_filenames |
| 5737 | }; |
| 5738 | |
| 5739 | /* DWARF-5 debug_names reader. */ |
| 5740 | |
| 5741 | /* DWARF-5 augmentation string for GDB's DW_IDX_GNU_* extension. */ |
| 5742 | static const gdb_byte dwarf5_augmentation[] = { 'G', 'D', 'B', 0 }; |
| 5743 | |
| 5744 | /* A helper function that reads the .debug_names section in SECTION |
| 5745 | and fills in MAP. FILENAME is the name of the file containing the |
| 5746 | section; it is used for error reporting. |
| 5747 | |
| 5748 | Returns true if all went well, false otherwise. */ |
| 5749 | |
| 5750 | static bool |
| 5751 | read_debug_names_from_section (struct objfile *objfile, |
| 5752 | const char *filename, |
| 5753 | struct dwarf2_section_info *section, |
| 5754 | mapped_debug_names &map) |
| 5755 | { |
| 5756 | if (dwarf2_section_empty_p (section)) |
| 5757 | return false; |
| 5758 | |
| 5759 | /* Older elfutils strip versions could keep the section in the main |
| 5760 | executable while splitting it for the separate debug info file. */ |
| 5761 | if ((get_section_flags (section) & SEC_HAS_CONTENTS) == 0) |
| 5762 | return false; |
| 5763 | |
| 5764 | dwarf2_read_section (objfile, section); |
| 5765 | |
| 5766 | map.dwarf5_byte_order = gdbarch_byte_order (get_objfile_arch (objfile)); |
| 5767 | |
| 5768 | const gdb_byte *addr = section->buffer; |
| 5769 | |
| 5770 | bfd *const abfd = get_section_bfd_owner (section); |
| 5771 | |
| 5772 | unsigned int bytes_read; |
| 5773 | LONGEST length = read_initial_length (abfd, addr, &bytes_read); |
| 5774 | addr += bytes_read; |
| 5775 | |
| 5776 | map.dwarf5_is_dwarf64 = bytes_read != 4; |
| 5777 | map.offset_size = map.dwarf5_is_dwarf64 ? 8 : 4; |
| 5778 | if (bytes_read + length != section->size) |
| 5779 | { |
| 5780 | /* There may be multiple per-CU indices. */ |
| 5781 | warning (_("Section .debug_names in %s length %s does not match " |
| 5782 | "section length %s, ignoring .debug_names."), |
| 5783 | filename, plongest (bytes_read + length), |
| 5784 | pulongest (section->size)); |
| 5785 | return false; |
| 5786 | } |
| 5787 | |
| 5788 | /* The version number. */ |
| 5789 | uint16_t version = read_2_bytes (abfd, addr); |
| 5790 | addr += 2; |
| 5791 | if (version != 5) |
| 5792 | { |
| 5793 | warning (_("Section .debug_names in %s has unsupported version %d, " |
| 5794 | "ignoring .debug_names."), |
| 5795 | filename, version); |
| 5796 | return false; |
| 5797 | } |
| 5798 | |
| 5799 | /* Padding. */ |
| 5800 | uint16_t padding = read_2_bytes (abfd, addr); |
| 5801 | addr += 2; |
| 5802 | if (padding != 0) |
| 5803 | { |
| 5804 | warning (_("Section .debug_names in %s has unsupported padding %d, " |
| 5805 | "ignoring .debug_names."), |
| 5806 | filename, padding); |
| 5807 | return false; |
| 5808 | } |
| 5809 | |
| 5810 | /* comp_unit_count - The number of CUs in the CU list. */ |
| 5811 | map.cu_count = read_4_bytes (abfd, addr); |
| 5812 | addr += 4; |
| 5813 | |
| 5814 | /* local_type_unit_count - The number of TUs in the local TU |
| 5815 | list. */ |
| 5816 | map.tu_count = read_4_bytes (abfd, addr); |
| 5817 | addr += 4; |
| 5818 | |
| 5819 | /* foreign_type_unit_count - The number of TUs in the foreign TU |
| 5820 | list. */ |
| 5821 | uint32_t foreign_tu_count = read_4_bytes (abfd, addr); |
| 5822 | addr += 4; |
| 5823 | if (foreign_tu_count != 0) |
| 5824 | { |
| 5825 | warning (_("Section .debug_names in %s has unsupported %lu foreign TUs, " |
| 5826 | "ignoring .debug_names."), |
| 5827 | filename, static_cast<unsigned long> (foreign_tu_count)); |
| 5828 | return false; |
| 5829 | } |
| 5830 | |
| 5831 | /* bucket_count - The number of hash buckets in the hash lookup |
| 5832 | table. */ |
| 5833 | map.bucket_count = read_4_bytes (abfd, addr); |
| 5834 | addr += 4; |
| 5835 | |
| 5836 | /* name_count - The number of unique names in the index. */ |
| 5837 | map.name_count = read_4_bytes (abfd, addr); |
| 5838 | addr += 4; |
| 5839 | |
| 5840 | /* abbrev_table_size - The size in bytes of the abbreviations |
| 5841 | table. */ |
| 5842 | uint32_t abbrev_table_size = read_4_bytes (abfd, addr); |
| 5843 | addr += 4; |
| 5844 | |
| 5845 | /* augmentation_string_size - The size in bytes of the augmentation |
| 5846 | string. This value is rounded up to a multiple of 4. */ |
| 5847 | uint32_t augmentation_string_size = read_4_bytes (abfd, addr); |
| 5848 | addr += 4; |
| 5849 | map.augmentation_is_gdb = ((augmentation_string_size |
| 5850 | == sizeof (dwarf5_augmentation)) |
| 5851 | && memcmp (addr, dwarf5_augmentation, |
| 5852 | sizeof (dwarf5_augmentation)) == 0); |
| 5853 | augmentation_string_size += (-augmentation_string_size) & 3; |
| 5854 | addr += augmentation_string_size; |
| 5855 | |
| 5856 | /* List of CUs */ |
| 5857 | map.cu_table_reordered = addr; |
| 5858 | addr += map.cu_count * map.offset_size; |
| 5859 | |
| 5860 | /* List of Local TUs */ |
| 5861 | map.tu_table_reordered = addr; |
| 5862 | addr += map.tu_count * map.offset_size; |
| 5863 | |
| 5864 | /* Hash Lookup Table */ |
| 5865 | map.bucket_table_reordered = reinterpret_cast<const uint32_t *> (addr); |
| 5866 | addr += map.bucket_count * 4; |
| 5867 | map.hash_table_reordered = reinterpret_cast<const uint32_t *> (addr); |
| 5868 | addr += map.name_count * 4; |
| 5869 | |
| 5870 | /* Name Table */ |
| 5871 | map.name_table_string_offs_reordered = addr; |
| 5872 | addr += map.name_count * map.offset_size; |
| 5873 | map.name_table_entry_offs_reordered = addr; |
| 5874 | addr += map.name_count * map.offset_size; |
| 5875 | |
| 5876 | const gdb_byte *abbrev_table_start = addr; |
| 5877 | for (;;) |
| 5878 | { |
| 5879 | unsigned int bytes_read; |
| 5880 | const ULONGEST index_num = read_unsigned_leb128 (abfd, addr, &bytes_read); |
| 5881 | addr += bytes_read; |
| 5882 | if (index_num == 0) |
| 5883 | break; |
| 5884 | |
| 5885 | const auto insertpair |
| 5886 | = map.abbrev_map.emplace (index_num, mapped_debug_names::index_val ()); |
| 5887 | if (!insertpair.second) |
| 5888 | { |
| 5889 | warning (_("Section .debug_names in %s has duplicate index %s, " |
| 5890 | "ignoring .debug_names."), |
| 5891 | filename, pulongest (index_num)); |
| 5892 | return false; |
| 5893 | } |
| 5894 | mapped_debug_names::index_val &indexval = insertpair.first->second; |
| 5895 | indexval.dwarf_tag = read_unsigned_leb128 (abfd, addr, &bytes_read); |
| 5896 | addr += bytes_read; |
| 5897 | |
| 5898 | for (;;) |
| 5899 | { |
| 5900 | mapped_debug_names::index_val::attr attr; |
| 5901 | attr.dw_idx = read_unsigned_leb128 (abfd, addr, &bytes_read); |
| 5902 | addr += bytes_read; |
| 5903 | attr.form = read_unsigned_leb128 (abfd, addr, &bytes_read); |
| 5904 | addr += bytes_read; |
| 5905 | if (attr.form == DW_FORM_implicit_const) |
| 5906 | { |
| 5907 | attr.implicit_const = read_signed_leb128 (abfd, addr, |
| 5908 | &bytes_read); |
| 5909 | addr += bytes_read; |
| 5910 | } |
| 5911 | if (attr.dw_idx == 0 && attr.form == 0) |
| 5912 | break; |
| 5913 | indexval.attr_vec.push_back (std::move (attr)); |
| 5914 | } |
| 5915 | } |
| 5916 | if (addr != abbrev_table_start + abbrev_table_size) |
| 5917 | { |
| 5918 | warning (_("Section .debug_names in %s has abbreviation_table " |
| 5919 | "of size %zu vs. written as %u, ignoring .debug_names."), |
| 5920 | filename, addr - abbrev_table_start, abbrev_table_size); |
| 5921 | return false; |
| 5922 | } |
| 5923 | map.entry_pool = addr; |
| 5924 | |
| 5925 | return true; |
| 5926 | } |
| 5927 | |
| 5928 | /* A helper for create_cus_from_debug_names that handles the MAP's CU |
| 5929 | list. */ |
| 5930 | |
| 5931 | static void |
| 5932 | create_cus_from_debug_names_list (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 5933 | const mapped_debug_names &map, |
| 5934 | dwarf2_section_info §ion, |
| 5935 | bool is_dwz, int base_offset) |
| 5936 | { |
| 5937 | sect_offset sect_off_prev; |
| 5938 | for (uint32_t i = 0; i <= map.cu_count; ++i) |
| 5939 | { |
| 5940 | sect_offset sect_off_next; |
| 5941 | if (i < map.cu_count) |
| 5942 | { |
| 5943 | sect_off_next |
| 5944 | = (sect_offset) (extract_unsigned_integer |
| 5945 | (map.cu_table_reordered + i * map.offset_size, |
| 5946 | map.offset_size, |
| 5947 | map.dwarf5_byte_order)); |
| 5948 | } |
| 5949 | else |
| 5950 | sect_off_next = (sect_offset) section.size; |
| 5951 | if (i >= 1) |
| 5952 | { |
| 5953 | const ULONGEST length = sect_off_next - sect_off_prev; |
| 5954 | dwarf2_per_objfile->all_comp_units[base_offset + (i - 1)] |
| 5955 | = create_cu_from_index_list (dwarf2_per_objfile, §ion, is_dwz, |
| 5956 | sect_off_prev, length); |
| 5957 | } |
| 5958 | sect_off_prev = sect_off_next; |
| 5959 | } |
| 5960 | } |
| 5961 | |
| 5962 | /* Read the CU list from the mapped index, and use it to create all |
| 5963 | the CU objects for this dwarf2_per_objfile. */ |
| 5964 | |
| 5965 | static void |
| 5966 | create_cus_from_debug_names (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 5967 | const mapped_debug_names &map, |
| 5968 | const mapped_debug_names &dwz_map) |
| 5969 | { |
| 5970 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 5971 | |
| 5972 | dwarf2_per_objfile->n_comp_units = map.cu_count + dwz_map.cu_count; |
| 5973 | dwarf2_per_objfile->all_comp_units |
| 5974 | = XOBNEWVEC (&objfile->objfile_obstack, struct dwarf2_per_cu_data *, |
| 5975 | dwarf2_per_objfile->n_comp_units); |
| 5976 | |
| 5977 | create_cus_from_debug_names_list (dwarf2_per_objfile, map, |
| 5978 | dwarf2_per_objfile->info, |
| 5979 | false /* is_dwz */, |
| 5980 | 0 /* base_offset */); |
| 5981 | |
| 5982 | if (dwz_map.cu_count == 0) |
| 5983 | return; |
| 5984 | |
| 5985 | dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
| 5986 | create_cus_from_debug_names_list (dwarf2_per_objfile, dwz_map, dwz->info, |
| 5987 | true /* is_dwz */, |
| 5988 | map.cu_count /* base_offset */); |
| 5989 | } |
| 5990 | |
| 5991 | /* Read .debug_names. If everything went ok, initialize the "quick" |
| 5992 | elements of all the CUs and return true. Otherwise, return false. */ |
| 5993 | |
| 5994 | static bool |
| 5995 | dwarf2_read_debug_names (struct dwarf2_per_objfile *dwarf2_per_objfile) |
| 5996 | { |
| 5997 | mapped_debug_names local_map (dwarf2_per_objfile); |
| 5998 | mapped_debug_names dwz_map (dwarf2_per_objfile); |
| 5999 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 6000 | |
| 6001 | if (!read_debug_names_from_section (objfile, objfile_name (objfile), |
| 6002 | &dwarf2_per_objfile->debug_names, |
| 6003 | local_map)) |
| 6004 | return false; |
| 6005 | |
| 6006 | /* Don't use the index if it's empty. */ |
| 6007 | if (local_map.name_count == 0) |
| 6008 | return false; |
| 6009 | |
| 6010 | /* If there is a .dwz file, read it so we can get its CU list as |
| 6011 | well. */ |
| 6012 | dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
| 6013 | if (dwz != NULL) |
| 6014 | { |
| 6015 | if (!read_debug_names_from_section (objfile, |
| 6016 | bfd_get_filename (dwz->dwz_bfd), |
| 6017 | &dwz->debug_names, dwz_map)) |
| 6018 | { |
| 6019 | warning (_("could not read '.debug_names' section from %s; skipping"), |
| 6020 | bfd_get_filename (dwz->dwz_bfd)); |
| 6021 | return false; |
| 6022 | } |
| 6023 | } |
| 6024 | |
| 6025 | create_cus_from_debug_names (dwarf2_per_objfile, local_map, dwz_map); |
| 6026 | |
| 6027 | if (local_map.tu_count != 0) |
| 6028 | { |
| 6029 | /* We can only handle a single .debug_types when we have an |
| 6030 | index. */ |
| 6031 | if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) != 1) |
| 6032 | return false; |
| 6033 | |
| 6034 | dwarf2_section_info *section = VEC_index (dwarf2_section_info_def, |
| 6035 | dwarf2_per_objfile->types, 0); |
| 6036 | |
| 6037 | create_signatured_type_table_from_debug_names |
| 6038 | (dwarf2_per_objfile, local_map, section, &dwarf2_per_objfile->abbrev); |
| 6039 | } |
| 6040 | |
| 6041 | create_addrmap_from_aranges (dwarf2_per_objfile, |
| 6042 | &dwarf2_per_objfile->debug_aranges); |
| 6043 | |
| 6044 | dwarf2_per_objfile->debug_names_table.reset |
| 6045 | (new mapped_debug_names (dwarf2_per_objfile)); |
| 6046 | *dwarf2_per_objfile->debug_names_table = std::move (local_map); |
| 6047 | dwarf2_per_objfile->using_index = 1; |
| 6048 | dwarf2_per_objfile->quick_file_names_table = |
| 6049 | create_quick_file_names_table (dwarf2_per_objfile->n_comp_units); |
| 6050 | |
| 6051 | return true; |
| 6052 | } |
| 6053 | |
| 6054 | /* Symbol name hashing function as specified by DWARF-5. */ |
| 6055 | |
| 6056 | static uint32_t |
| 6057 | dwarf5_djb_hash (const char *str_) |
| 6058 | { |
| 6059 | const unsigned char *str = (const unsigned char *) str_; |
| 6060 | |
| 6061 | /* Note: tolower here ignores UTF-8, which isn't fully compliant. |
| 6062 | See http://dwarfstd.org/ShowIssue.php?issue=161027.1. */ |
| 6063 | |
| 6064 | uint32_t hash = 5381; |
| 6065 | while (int c = *str++) |
| 6066 | hash = hash * 33 + tolower (c); |
| 6067 | return hash; |
| 6068 | } |
| 6069 | |
| 6070 | /* Type used to manage iterating over all CUs looking for a symbol for |
| 6071 | .debug_names. */ |
| 6072 | |
| 6073 | class dw2_debug_names_iterator |
| 6074 | { |
| 6075 | public: |
| 6076 | /* If WANT_SPECIFIC_BLOCK is true, only look for symbols in block |
| 6077 | BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */ |
| 6078 | dw2_debug_names_iterator (const mapped_debug_names &map, |
| 6079 | bool want_specific_block, |
| 6080 | block_enum block_index, domain_enum domain, |
| 6081 | const char *name) |
| 6082 | : m_map (map), m_want_specific_block (want_specific_block), |
| 6083 | m_block_index (block_index), m_domain (domain), |
| 6084 | m_addr (find_vec_in_debug_names (map, name)) |
| 6085 | {} |
| 6086 | |
| 6087 | dw2_debug_names_iterator (const mapped_debug_names &map, |
| 6088 | search_domain search, uint32_t namei) |
| 6089 | : m_map (map), |
| 6090 | m_search (search), |
| 6091 | m_addr (find_vec_in_debug_names (map, namei)) |
| 6092 | {} |
| 6093 | |
| 6094 | /* Return the next matching CU or NULL if there are no more. */ |
| 6095 | dwarf2_per_cu_data *next (); |
| 6096 | |
| 6097 | private: |
| 6098 | static const gdb_byte *find_vec_in_debug_names (const mapped_debug_names &map, |
| 6099 | const char *name); |
| 6100 | static const gdb_byte *find_vec_in_debug_names (const mapped_debug_names &map, |
| 6101 | uint32_t namei); |
| 6102 | |
| 6103 | /* The internalized form of .debug_names. */ |
| 6104 | const mapped_debug_names &m_map; |
| 6105 | |
| 6106 | /* If true, only look for symbols that match BLOCK_INDEX. */ |
| 6107 | const bool m_want_specific_block = false; |
| 6108 | |
| 6109 | /* One of GLOBAL_BLOCK or STATIC_BLOCK. |
| 6110 | Unused if !WANT_SPECIFIC_BLOCK - FIRST_LOCAL_BLOCK is an invalid |
| 6111 | value. */ |
| 6112 | const block_enum m_block_index = FIRST_LOCAL_BLOCK; |
| 6113 | |
| 6114 | /* The kind of symbol we're looking for. */ |
| 6115 | const domain_enum m_domain = UNDEF_DOMAIN; |
| 6116 | const search_domain m_search = ALL_DOMAIN; |
| 6117 | |
| 6118 | /* The list of CUs from the index entry of the symbol, or NULL if |
| 6119 | not found. */ |
| 6120 | const gdb_byte *m_addr; |
| 6121 | }; |
| 6122 | |
| 6123 | const char * |
| 6124 | mapped_debug_names::namei_to_name (uint32_t namei) const |
| 6125 | { |
| 6126 | const ULONGEST namei_string_offs |
| 6127 | = extract_unsigned_integer ((name_table_string_offs_reordered |
| 6128 | + namei * offset_size), |
| 6129 | offset_size, |
| 6130 | dwarf5_byte_order); |
| 6131 | return read_indirect_string_at_offset |
| 6132 | (dwarf2_per_objfile, dwarf2_per_objfile->objfile->obfd, namei_string_offs); |
| 6133 | } |
| 6134 | |
| 6135 | /* Find a slot in .debug_names for the object named NAME. If NAME is |
| 6136 | found, return pointer to its pool data. If NAME cannot be found, |
| 6137 | return NULL. */ |
| 6138 | |
| 6139 | const gdb_byte * |
| 6140 | dw2_debug_names_iterator::find_vec_in_debug_names |
| 6141 | (const mapped_debug_names &map, const char *name) |
| 6142 | { |
| 6143 | int (*cmp) (const char *, const char *); |
| 6144 | |
| 6145 | if (current_language->la_language == language_cplus |
| 6146 | || current_language->la_language == language_fortran |
| 6147 | || current_language->la_language == language_d) |
| 6148 | { |
| 6149 | /* NAME is already canonical. Drop any qualifiers as |
| 6150 | .debug_names does not contain any. */ |
| 6151 | |
| 6152 | if (strchr (name, '(') != NULL) |
| 6153 | { |
| 6154 | gdb::unique_xmalloc_ptr<char> without_params |
| 6155 | = cp_remove_params (name); |
| 6156 | |
| 6157 | if (without_params != NULL) |
| 6158 | { |
| 6159 | name = without_params.get(); |
| 6160 | } |
| 6161 | } |
| 6162 | } |
| 6163 | |
| 6164 | cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp); |
| 6165 | |
| 6166 | const uint32_t full_hash = dwarf5_djb_hash (name); |
| 6167 | uint32_t namei |
| 6168 | = extract_unsigned_integer (reinterpret_cast<const gdb_byte *> |
| 6169 | (map.bucket_table_reordered |
| 6170 | + (full_hash % map.bucket_count)), 4, |
| 6171 | map.dwarf5_byte_order); |
| 6172 | if (namei == 0) |
| 6173 | return NULL; |
| 6174 | --namei; |
| 6175 | if (namei >= map.name_count) |
| 6176 | { |
| 6177 | complaint (&symfile_complaints, |
| 6178 | _("Wrong .debug_names with name index %u but name_count=%u " |
| 6179 | "[in module %s]"), |
| 6180 | namei, map.name_count, |
| 6181 | objfile_name (map.dwarf2_per_objfile->objfile)); |
| 6182 | return NULL; |
| 6183 | } |
| 6184 | |
| 6185 | for (;;) |
| 6186 | { |
| 6187 | const uint32_t namei_full_hash |
| 6188 | = extract_unsigned_integer (reinterpret_cast<const gdb_byte *> |
| 6189 | (map.hash_table_reordered + namei), 4, |
| 6190 | map.dwarf5_byte_order); |
| 6191 | if (full_hash % map.bucket_count != namei_full_hash % map.bucket_count) |
| 6192 | return NULL; |
| 6193 | |
| 6194 | if (full_hash == namei_full_hash) |
| 6195 | { |
| 6196 | const char *const namei_string = map.namei_to_name (namei); |
| 6197 | |
| 6198 | #if 0 /* An expensive sanity check. */ |
| 6199 | if (namei_full_hash != dwarf5_djb_hash (namei_string)) |
| 6200 | { |
| 6201 | complaint (&symfile_complaints, |
| 6202 | _("Wrong .debug_names hash for string at index %u " |
| 6203 | "[in module %s]"), |
| 6204 | namei, objfile_name (dwarf2_per_objfile->objfile)); |
| 6205 | return NULL; |
| 6206 | } |
| 6207 | #endif |
| 6208 | |
| 6209 | if (cmp (namei_string, name) == 0) |
| 6210 | { |
| 6211 | const ULONGEST namei_entry_offs |
| 6212 | = extract_unsigned_integer ((map.name_table_entry_offs_reordered |
| 6213 | + namei * map.offset_size), |
| 6214 | map.offset_size, map.dwarf5_byte_order); |
| 6215 | return map.entry_pool + namei_entry_offs; |
| 6216 | } |
| 6217 | } |
| 6218 | |
| 6219 | ++namei; |
| 6220 | if (namei >= map.name_count) |
| 6221 | return NULL; |
| 6222 | } |
| 6223 | } |
| 6224 | |
| 6225 | const gdb_byte * |
| 6226 | dw2_debug_names_iterator::find_vec_in_debug_names |
| 6227 | (const mapped_debug_names &map, uint32_t namei) |
| 6228 | { |
| 6229 | if (namei >= map.name_count) |
| 6230 | { |
| 6231 | complaint (&symfile_complaints, |
| 6232 | _("Wrong .debug_names with name index %u but name_count=%u " |
| 6233 | "[in module %s]"), |
| 6234 | namei, map.name_count, |
| 6235 | objfile_name (map.dwarf2_per_objfile->objfile)); |
| 6236 | return NULL; |
| 6237 | } |
| 6238 | |
| 6239 | const ULONGEST namei_entry_offs |
| 6240 | = extract_unsigned_integer ((map.name_table_entry_offs_reordered |
| 6241 | + namei * map.offset_size), |
| 6242 | map.offset_size, map.dwarf5_byte_order); |
| 6243 | return map.entry_pool + namei_entry_offs; |
| 6244 | } |
| 6245 | |
| 6246 | /* See dw2_debug_names_iterator. */ |
| 6247 | |
| 6248 | dwarf2_per_cu_data * |
| 6249 | dw2_debug_names_iterator::next () |
| 6250 | { |
| 6251 | if (m_addr == NULL) |
| 6252 | return NULL; |
| 6253 | |
| 6254 | struct dwarf2_per_objfile *dwarf2_per_objfile = m_map.dwarf2_per_objfile; |
| 6255 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 6256 | bfd *const abfd = objfile->obfd; |
| 6257 | |
| 6258 | again: |
| 6259 | |
| 6260 | unsigned int bytes_read; |
| 6261 | const ULONGEST abbrev = read_unsigned_leb128 (abfd, m_addr, &bytes_read); |
| 6262 | m_addr += bytes_read; |
| 6263 | if (abbrev == 0) |
| 6264 | return NULL; |
| 6265 | |
| 6266 | const auto indexval_it = m_map.abbrev_map.find (abbrev); |
| 6267 | if (indexval_it == m_map.abbrev_map.cend ()) |
| 6268 | { |
| 6269 | complaint (&symfile_complaints, |
| 6270 | _("Wrong .debug_names undefined abbrev code %s " |
| 6271 | "[in module %s]"), |
| 6272 | pulongest (abbrev), objfile_name (objfile)); |
| 6273 | return NULL; |
| 6274 | } |
| 6275 | const mapped_debug_names::index_val &indexval = indexval_it->second; |
| 6276 | bool have_is_static = false; |
| 6277 | bool is_static; |
| 6278 | dwarf2_per_cu_data *per_cu = NULL; |
| 6279 | for (const mapped_debug_names::index_val::attr &attr : indexval.attr_vec) |
| 6280 | { |
| 6281 | ULONGEST ull; |
| 6282 | switch (attr.form) |
| 6283 | { |
| 6284 | case DW_FORM_implicit_const: |
| 6285 | ull = attr.implicit_const; |
| 6286 | break; |
| 6287 | case DW_FORM_flag_present: |
| 6288 | ull = 1; |
| 6289 | break; |
| 6290 | case DW_FORM_udata: |
| 6291 | ull = read_unsigned_leb128 (abfd, m_addr, &bytes_read); |
| 6292 | m_addr += bytes_read; |
| 6293 | break; |
| 6294 | default: |
| 6295 | complaint (&symfile_complaints, |
| 6296 | _("Unsupported .debug_names form %s [in module %s]"), |
| 6297 | dwarf_form_name (attr.form), |
| 6298 | objfile_name (objfile)); |
| 6299 | return NULL; |
| 6300 | } |
| 6301 | switch (attr.dw_idx) |
| 6302 | { |
| 6303 | case DW_IDX_compile_unit: |
| 6304 | /* Don't crash on bad data. */ |
| 6305 | if (ull >= dwarf2_per_objfile->n_comp_units) |
| 6306 | { |
| 6307 | complaint (&symfile_complaints, |
| 6308 | _(".debug_names entry has bad CU index %s" |
| 6309 | " [in module %s]"), |
| 6310 | pulongest (ull), |
| 6311 | objfile_name (dwarf2_per_objfile->objfile)); |
| 6312 | continue; |
| 6313 | } |
| 6314 | per_cu = dw2_get_cutu (dwarf2_per_objfile, ull); |
| 6315 | break; |
| 6316 | case DW_IDX_type_unit: |
| 6317 | /* Don't crash on bad data. */ |
| 6318 | if (ull >= dwarf2_per_objfile->n_type_units) |
| 6319 | { |
| 6320 | complaint (&symfile_complaints, |
| 6321 | _(".debug_names entry has bad TU index %s" |
| 6322 | " [in module %s]"), |
| 6323 | pulongest (ull), |
| 6324 | objfile_name (dwarf2_per_objfile->objfile)); |
| 6325 | continue; |
| 6326 | } |
| 6327 | per_cu = dw2_get_cutu (dwarf2_per_objfile, |
| 6328 | dwarf2_per_objfile->n_comp_units + ull); |
| 6329 | break; |
| 6330 | case DW_IDX_GNU_internal: |
| 6331 | if (!m_map.augmentation_is_gdb) |
| 6332 | break; |
| 6333 | have_is_static = true; |
| 6334 | is_static = true; |
| 6335 | break; |
| 6336 | case DW_IDX_GNU_external: |
| 6337 | if (!m_map.augmentation_is_gdb) |
| 6338 | break; |
| 6339 | have_is_static = true; |
| 6340 | is_static = false; |
| 6341 | break; |
| 6342 | } |
| 6343 | } |
| 6344 | |
| 6345 | /* Skip if already read in. */ |
| 6346 | if (per_cu->v.quick->compunit_symtab) |
| 6347 | goto again; |
| 6348 | |
| 6349 | /* Check static vs global. */ |
| 6350 | if (have_is_static) |
| 6351 | { |
| 6352 | const bool want_static = m_block_index != GLOBAL_BLOCK; |
| 6353 | if (m_want_specific_block && want_static != is_static) |
| 6354 | goto again; |
| 6355 | } |
| 6356 | |
| 6357 | /* Match dw2_symtab_iter_next, symbol_kind |
| 6358 | and debug_names::psymbol_tag. */ |
| 6359 | switch (m_domain) |
| 6360 | { |
| 6361 | case VAR_DOMAIN: |
| 6362 | switch (indexval.dwarf_tag) |
| 6363 | { |
| 6364 | case DW_TAG_variable: |
| 6365 | case DW_TAG_subprogram: |
| 6366 | /* Some types are also in VAR_DOMAIN. */ |
| 6367 | case DW_TAG_typedef: |
| 6368 | case DW_TAG_structure_type: |
| 6369 | break; |
| 6370 | default: |
| 6371 | goto again; |
| 6372 | } |
| 6373 | break; |
| 6374 | case STRUCT_DOMAIN: |
| 6375 | switch (indexval.dwarf_tag) |
| 6376 | { |
| 6377 | case DW_TAG_typedef: |
| 6378 | case DW_TAG_structure_type: |
| 6379 | break; |
| 6380 | default: |
| 6381 | goto again; |
| 6382 | } |
| 6383 | break; |
| 6384 | case LABEL_DOMAIN: |
| 6385 | switch (indexval.dwarf_tag) |
| 6386 | { |
| 6387 | case 0: |
| 6388 | case DW_TAG_variable: |
| 6389 | break; |
| 6390 | default: |
| 6391 | goto again; |
| 6392 | } |
| 6393 | break; |
| 6394 | default: |
| 6395 | break; |
| 6396 | } |
| 6397 | |
| 6398 | /* Match dw2_expand_symtabs_matching, symbol_kind and |
| 6399 | debug_names::psymbol_tag. */ |
| 6400 | switch (m_search) |
| 6401 | { |
| 6402 | case VARIABLES_DOMAIN: |
| 6403 | switch (indexval.dwarf_tag) |
| 6404 | { |
| 6405 | case DW_TAG_variable: |
| 6406 | break; |
| 6407 | default: |
| 6408 | goto again; |
| 6409 | } |
| 6410 | break; |
| 6411 | case FUNCTIONS_DOMAIN: |
| 6412 | switch (indexval.dwarf_tag) |
| 6413 | { |
| 6414 | case DW_TAG_subprogram: |
| 6415 | break; |
| 6416 | default: |
| 6417 | goto again; |
| 6418 | } |
| 6419 | break; |
| 6420 | case TYPES_DOMAIN: |
| 6421 | switch (indexval.dwarf_tag) |
| 6422 | { |
| 6423 | case DW_TAG_typedef: |
| 6424 | case DW_TAG_structure_type: |
| 6425 | break; |
| 6426 | default: |
| 6427 | goto again; |
| 6428 | } |
| 6429 | break; |
| 6430 | default: |
| 6431 | break; |
| 6432 | } |
| 6433 | |
| 6434 | return per_cu; |
| 6435 | } |
| 6436 | |
| 6437 | static struct compunit_symtab * |
| 6438 | dw2_debug_names_lookup_symbol (struct objfile *objfile, int block_index_int, |
| 6439 | const char *name, domain_enum domain) |
| 6440 | { |
| 6441 | const block_enum block_index = static_cast<block_enum> (block_index_int); |
| 6442 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 6443 | = get_dwarf2_per_objfile (objfile); |
| 6444 | |
| 6445 | const auto &mapp = dwarf2_per_objfile->debug_names_table; |
| 6446 | if (!mapp) |
| 6447 | { |
| 6448 | /* index is NULL if OBJF_READNOW. */ |
| 6449 | return NULL; |
| 6450 | } |
| 6451 | const auto &map = *mapp; |
| 6452 | |
| 6453 | dw2_debug_names_iterator iter (map, true /* want_specific_block */, |
| 6454 | block_index, domain, name); |
| 6455 | |
| 6456 | struct compunit_symtab *stab_best = NULL; |
| 6457 | struct dwarf2_per_cu_data *per_cu; |
| 6458 | while ((per_cu = iter.next ()) != NULL) |
| 6459 | { |
| 6460 | struct symbol *sym, *with_opaque = NULL; |
| 6461 | struct compunit_symtab *stab = dw2_instantiate_symtab (per_cu); |
| 6462 | const struct blockvector *bv = COMPUNIT_BLOCKVECTOR (stab); |
| 6463 | struct block *block = BLOCKVECTOR_BLOCK (bv, block_index); |
| 6464 | |
| 6465 | sym = block_find_symbol (block, name, domain, |
| 6466 | block_find_non_opaque_type_preferred, |
| 6467 | &with_opaque); |
| 6468 | |
| 6469 | /* Some caution must be observed with overloaded functions and |
| 6470 | methods, since the index will not contain any overload |
| 6471 | information (but NAME might contain it). */ |
| 6472 | |
| 6473 | if (sym != NULL |
| 6474 | && strcmp_iw (SYMBOL_SEARCH_NAME (sym), name) == 0) |
| 6475 | return stab; |
| 6476 | if (with_opaque != NULL |
| 6477 | && strcmp_iw (SYMBOL_SEARCH_NAME (with_opaque), name) == 0) |
| 6478 | stab_best = stab; |
| 6479 | |
| 6480 | /* Keep looking through other CUs. */ |
| 6481 | } |
| 6482 | |
| 6483 | return stab_best; |
| 6484 | } |
| 6485 | |
| 6486 | /* This dumps minimal information about .debug_names. It is called |
| 6487 | via "mt print objfiles". The gdb.dwarf2/gdb-index.exp testcase |
| 6488 | uses this to verify that .debug_names has been loaded. */ |
| 6489 | |
| 6490 | static void |
| 6491 | dw2_debug_names_dump (struct objfile *objfile) |
| 6492 | { |
| 6493 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 6494 | = get_dwarf2_per_objfile (objfile); |
| 6495 | |
| 6496 | gdb_assert (dwarf2_per_objfile->using_index); |
| 6497 | printf_filtered (".debug_names:"); |
| 6498 | if (dwarf2_per_objfile->debug_names_table) |
| 6499 | printf_filtered (" exists\n"); |
| 6500 | else |
| 6501 | printf_filtered (" faked for \"readnow\"\n"); |
| 6502 | printf_filtered ("\n"); |
| 6503 | } |
| 6504 | |
| 6505 | static void |
| 6506 | dw2_debug_names_expand_symtabs_for_function (struct objfile *objfile, |
| 6507 | const char *func_name) |
| 6508 | { |
| 6509 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 6510 | = get_dwarf2_per_objfile (objfile); |
| 6511 | |
| 6512 | /* dwarf2_per_objfile->debug_names_table is NULL if OBJF_READNOW. */ |
| 6513 | if (dwarf2_per_objfile->debug_names_table) |
| 6514 | { |
| 6515 | const mapped_debug_names &map = *dwarf2_per_objfile->debug_names_table; |
| 6516 | |
| 6517 | /* Note: It doesn't matter what we pass for block_index here. */ |
| 6518 | dw2_debug_names_iterator iter (map, false /* want_specific_block */, |
| 6519 | GLOBAL_BLOCK, VAR_DOMAIN, func_name); |
| 6520 | |
| 6521 | struct dwarf2_per_cu_data *per_cu; |
| 6522 | while ((per_cu = iter.next ()) != NULL) |
| 6523 | dw2_instantiate_symtab (per_cu); |
| 6524 | } |
| 6525 | } |
| 6526 | |
| 6527 | static void |
| 6528 | dw2_debug_names_expand_symtabs_matching |
| 6529 | (struct objfile *objfile, |
| 6530 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, |
| 6531 | const lookup_name_info &lookup_name, |
| 6532 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, |
| 6533 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, |
| 6534 | enum search_domain kind) |
| 6535 | { |
| 6536 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 6537 | = get_dwarf2_per_objfile (objfile); |
| 6538 | |
| 6539 | /* debug_names_table is NULL if OBJF_READNOW. */ |
| 6540 | if (!dwarf2_per_objfile->debug_names_table) |
| 6541 | return; |
| 6542 | |
| 6543 | dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile, file_matcher); |
| 6544 | |
| 6545 | mapped_debug_names &map = *dwarf2_per_objfile->debug_names_table; |
| 6546 | |
| 6547 | dw2_expand_symtabs_matching_symbol (map, lookup_name, |
| 6548 | symbol_matcher, |
| 6549 | kind, [&] (offset_type namei) |
| 6550 | { |
| 6551 | /* The name was matched, now expand corresponding CUs that were |
| 6552 | marked. */ |
| 6553 | dw2_debug_names_iterator iter (map, kind, namei); |
| 6554 | |
| 6555 | struct dwarf2_per_cu_data *per_cu; |
| 6556 | while ((per_cu = iter.next ()) != NULL) |
| 6557 | dw2_expand_symtabs_matching_one (per_cu, file_matcher, |
| 6558 | expansion_notify); |
| 6559 | }); |
| 6560 | } |
| 6561 | |
| 6562 | const struct quick_symbol_functions dwarf2_debug_names_functions = |
| 6563 | { |
| 6564 | dw2_has_symbols, |
| 6565 | dw2_find_last_source_symtab, |
| 6566 | dw2_forget_cached_source_info, |
| 6567 | dw2_map_symtabs_matching_filename, |
| 6568 | dw2_debug_names_lookup_symbol, |
| 6569 | dw2_print_stats, |
| 6570 | dw2_debug_names_dump, |
| 6571 | dw2_relocate, |
| 6572 | dw2_debug_names_expand_symtabs_for_function, |
| 6573 | dw2_expand_all_symtabs, |
| 6574 | dw2_expand_symtabs_with_fullname, |
| 6575 | dw2_map_matching_symbols, |
| 6576 | dw2_debug_names_expand_symtabs_matching, |
| 6577 | dw2_find_pc_sect_compunit_symtab, |
| 6578 | NULL, |
| 6579 | dw2_map_symbol_filenames |
| 6580 | }; |
| 6581 | |
| 6582 | /* See symfile.h. */ |
| 6583 | |
| 6584 | bool |
| 6585 | dwarf2_initialize_objfile (struct objfile *objfile, dw_index_kind *index_kind) |
| 6586 | { |
| 6587 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 6588 | = get_dwarf2_per_objfile (objfile); |
| 6589 | |
| 6590 | /* If we're about to read full symbols, don't bother with the |
| 6591 | indices. In this case we also don't care if some other debug |
| 6592 | format is making psymtabs, because they are all about to be |
| 6593 | expanded anyway. */ |
| 6594 | if ((objfile->flags & OBJF_READNOW)) |
| 6595 | { |
| 6596 | int i; |
| 6597 | |
| 6598 | dwarf2_per_objfile->using_index = 1; |
| 6599 | create_all_comp_units (dwarf2_per_objfile); |
| 6600 | create_all_type_units (dwarf2_per_objfile); |
| 6601 | dwarf2_per_objfile->quick_file_names_table = |
| 6602 | create_quick_file_names_table (dwarf2_per_objfile->n_comp_units); |
| 6603 | |
| 6604 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units |
| 6605 | + dwarf2_per_objfile->n_type_units); ++i) |
| 6606 | { |
| 6607 | dwarf2_per_cu_data *per_cu = dw2_get_cutu (dwarf2_per_objfile, i); |
| 6608 | |
| 6609 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
| 6610 | struct dwarf2_per_cu_quick_data); |
| 6611 | } |
| 6612 | |
| 6613 | /* Return 1 so that gdb sees the "quick" functions. However, |
| 6614 | these functions will be no-ops because we will have expanded |
| 6615 | all symtabs. */ |
| 6616 | *index_kind = dw_index_kind::GDB_INDEX; |
| 6617 | return true; |
| 6618 | } |
| 6619 | |
| 6620 | if (dwarf2_read_debug_names (dwarf2_per_objfile)) |
| 6621 | { |
| 6622 | *index_kind = dw_index_kind::DEBUG_NAMES; |
| 6623 | return true; |
| 6624 | } |
| 6625 | |
| 6626 | if (dwarf2_read_index (objfile)) |
| 6627 | { |
| 6628 | *index_kind = dw_index_kind::GDB_INDEX; |
| 6629 | return true; |
| 6630 | } |
| 6631 | |
| 6632 | return false; |
| 6633 | } |
| 6634 | |
| 6635 | \f |
| 6636 | |
| 6637 | /* Build a partial symbol table. */ |
| 6638 | |
| 6639 | void |
| 6640 | dwarf2_build_psymtabs (struct objfile *objfile) |
| 6641 | { |
| 6642 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 6643 | = get_dwarf2_per_objfile (objfile); |
| 6644 | |
| 6645 | if (objfile->global_psymbols.capacity () == 0 |
| 6646 | && objfile->static_psymbols.capacity () == 0) |
| 6647 | init_psymbol_list (objfile, 1024); |
| 6648 | |
| 6649 | TRY |
| 6650 | { |
| 6651 | /* This isn't really ideal: all the data we allocate on the |
| 6652 | objfile's obstack is still uselessly kept around. However, |
| 6653 | freeing it seems unsafe. */ |
| 6654 | psymtab_discarder psymtabs (objfile); |
| 6655 | dwarf2_build_psymtabs_hard (dwarf2_per_objfile); |
| 6656 | psymtabs.keep (); |
| 6657 | } |
| 6658 | CATCH (except, RETURN_MASK_ERROR) |
| 6659 | { |
| 6660 | exception_print (gdb_stderr, except); |
| 6661 | } |
| 6662 | END_CATCH |
| 6663 | } |
| 6664 | |
| 6665 | /* Return the total length of the CU described by HEADER. */ |
| 6666 | |
| 6667 | static unsigned int |
| 6668 | get_cu_length (const struct comp_unit_head *header) |
| 6669 | { |
| 6670 | return header->initial_length_size + header->length; |
| 6671 | } |
| 6672 | |
| 6673 | /* Return TRUE if SECT_OFF is within CU_HEADER. */ |
| 6674 | |
| 6675 | static inline bool |
| 6676 | offset_in_cu_p (const comp_unit_head *cu_header, sect_offset sect_off) |
| 6677 | { |
| 6678 | sect_offset bottom = cu_header->sect_off; |
| 6679 | sect_offset top = cu_header->sect_off + get_cu_length (cu_header); |
| 6680 | |
| 6681 | return sect_off >= bottom && sect_off < top; |
| 6682 | } |
| 6683 | |
| 6684 | /* Find the base address of the compilation unit for range lists and |
| 6685 | location lists. It will normally be specified by DW_AT_low_pc. |
| 6686 | In DWARF-3 draft 4, the base address could be overridden by |
| 6687 | DW_AT_entry_pc. It's been removed, but GCC still uses this for |
| 6688 | compilation units with discontinuous ranges. */ |
| 6689 | |
| 6690 | static void |
| 6691 | dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu) |
| 6692 | { |
| 6693 | struct attribute *attr; |
| 6694 | |
| 6695 | cu->base_known = 0; |
| 6696 | cu->base_address = 0; |
| 6697 | |
| 6698 | attr = dwarf2_attr (die, DW_AT_entry_pc, cu); |
| 6699 | if (attr) |
| 6700 | { |
| 6701 | cu->base_address = attr_value_as_address (attr); |
| 6702 | cu->base_known = 1; |
| 6703 | } |
| 6704 | else |
| 6705 | { |
| 6706 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
| 6707 | if (attr) |
| 6708 | { |
| 6709 | cu->base_address = attr_value_as_address (attr); |
| 6710 | cu->base_known = 1; |
| 6711 | } |
| 6712 | } |
| 6713 | } |
| 6714 | |
| 6715 | /* Read in the comp unit header information from the debug_info at info_ptr. |
| 6716 | Use rcuh_kind::COMPILE as the default type if not known by the caller. |
| 6717 | NOTE: This leaves members offset, first_die_offset to be filled in |
| 6718 | by the caller. */ |
| 6719 | |
| 6720 | static const gdb_byte * |
| 6721 | read_comp_unit_head (struct comp_unit_head *cu_header, |
| 6722 | const gdb_byte *info_ptr, |
| 6723 | struct dwarf2_section_info *section, |
| 6724 | rcuh_kind section_kind) |
| 6725 | { |
| 6726 | int signed_addr; |
| 6727 | unsigned int bytes_read; |
| 6728 | const char *filename = get_section_file_name (section); |
| 6729 | bfd *abfd = get_section_bfd_owner (section); |
| 6730 | |
| 6731 | cu_header->length = read_initial_length (abfd, info_ptr, &bytes_read); |
| 6732 | cu_header->initial_length_size = bytes_read; |
| 6733 | cu_header->offset_size = (bytes_read == 4) ? 4 : 8; |
| 6734 | info_ptr += bytes_read; |
| 6735 | cu_header->version = read_2_bytes (abfd, info_ptr); |
| 6736 | info_ptr += 2; |
| 6737 | if (cu_header->version < 5) |
| 6738 | switch (section_kind) |
| 6739 | { |
| 6740 | case rcuh_kind::COMPILE: |
| 6741 | cu_header->unit_type = DW_UT_compile; |
| 6742 | break; |
| 6743 | case rcuh_kind::TYPE: |
| 6744 | cu_header->unit_type = DW_UT_type; |
| 6745 | break; |
| 6746 | default: |
| 6747 | internal_error (__FILE__, __LINE__, |
| 6748 | _("read_comp_unit_head: invalid section_kind")); |
| 6749 | } |
| 6750 | else |
| 6751 | { |
| 6752 | cu_header->unit_type = static_cast<enum dwarf_unit_type> |
| 6753 | (read_1_byte (abfd, info_ptr)); |
| 6754 | info_ptr += 1; |
| 6755 | switch (cu_header->unit_type) |
| 6756 | { |
| 6757 | case DW_UT_compile: |
| 6758 | if (section_kind != rcuh_kind::COMPILE) |
| 6759 | error (_("Dwarf Error: wrong unit_type in compilation unit header " |
| 6760 | "(is DW_UT_compile, should be DW_UT_type) [in module %s]"), |
| 6761 | filename); |
| 6762 | break; |
| 6763 | case DW_UT_type: |
| 6764 | section_kind = rcuh_kind::TYPE; |
| 6765 | break; |
| 6766 | default: |
| 6767 | error (_("Dwarf Error: wrong unit_type in compilation unit header " |
| 6768 | "(is %d, should be %d or %d) [in module %s]"), |
| 6769 | cu_header->unit_type, DW_UT_compile, DW_UT_type, filename); |
| 6770 | } |
| 6771 | |
| 6772 | cu_header->addr_size = read_1_byte (abfd, info_ptr); |
| 6773 | info_ptr += 1; |
| 6774 | } |
| 6775 | cu_header->abbrev_sect_off = (sect_offset) read_offset (abfd, info_ptr, |
| 6776 | cu_header, |
| 6777 | &bytes_read); |
| 6778 | info_ptr += bytes_read; |
| 6779 | if (cu_header->version < 5) |
| 6780 | { |
| 6781 | cu_header->addr_size = read_1_byte (abfd, info_ptr); |
| 6782 | info_ptr += 1; |
| 6783 | } |
| 6784 | signed_addr = bfd_get_sign_extend_vma (abfd); |
| 6785 | if (signed_addr < 0) |
| 6786 | internal_error (__FILE__, __LINE__, |
| 6787 | _("read_comp_unit_head: dwarf from non elf file")); |
| 6788 | cu_header->signed_addr_p = signed_addr; |
| 6789 | |
| 6790 | if (section_kind == rcuh_kind::TYPE) |
| 6791 | { |
| 6792 | LONGEST type_offset; |
| 6793 | |
| 6794 | cu_header->signature = read_8_bytes (abfd, info_ptr); |
| 6795 | info_ptr += 8; |
| 6796 | |
| 6797 | type_offset = read_offset (abfd, info_ptr, cu_header, &bytes_read); |
| 6798 | info_ptr += bytes_read; |
| 6799 | cu_header->type_cu_offset_in_tu = (cu_offset) type_offset; |
| 6800 | if (to_underlying (cu_header->type_cu_offset_in_tu) != type_offset) |
| 6801 | error (_("Dwarf Error: Too big type_offset in compilation unit " |
| 6802 | "header (is %s) [in module %s]"), plongest (type_offset), |
| 6803 | filename); |
| 6804 | } |
| 6805 | |
| 6806 | return info_ptr; |
| 6807 | } |
| 6808 | |
| 6809 | /* Helper function that returns the proper abbrev section for |
| 6810 | THIS_CU. */ |
| 6811 | |
| 6812 | static struct dwarf2_section_info * |
| 6813 | get_abbrev_section_for_cu (struct dwarf2_per_cu_data *this_cu) |
| 6814 | { |
| 6815 | struct dwarf2_section_info *abbrev; |
| 6816 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_cu->dwarf2_per_objfile; |
| 6817 | |
| 6818 | if (this_cu->is_dwz) |
| 6819 | abbrev = &dwarf2_get_dwz_file (dwarf2_per_objfile)->abbrev; |
| 6820 | else |
| 6821 | abbrev = &dwarf2_per_objfile->abbrev; |
| 6822 | |
| 6823 | return abbrev; |
| 6824 | } |
| 6825 | |
| 6826 | /* Subroutine of read_and_check_comp_unit_head and |
| 6827 | read_and_check_type_unit_head to simplify them. |
| 6828 | Perform various error checking on the header. */ |
| 6829 | |
| 6830 | static void |
| 6831 | error_check_comp_unit_head (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 6832 | struct comp_unit_head *header, |
| 6833 | struct dwarf2_section_info *section, |
| 6834 | struct dwarf2_section_info *abbrev_section) |
| 6835 | { |
| 6836 | const char *filename = get_section_file_name (section); |
| 6837 | |
| 6838 | if (header->version < 2 || header->version > 5) |
| 6839 | error (_("Dwarf Error: wrong version in compilation unit header " |
| 6840 | "(is %d, should be 2, 3, 4 or 5) [in module %s]"), header->version, |
| 6841 | filename); |
| 6842 | |
| 6843 | if (to_underlying (header->abbrev_sect_off) |
| 6844 | >= dwarf2_section_size (dwarf2_per_objfile->objfile, abbrev_section)) |
| 6845 | error (_("Dwarf Error: bad offset (0x%x) in compilation unit header " |
| 6846 | "(offset 0x%x + 6) [in module %s]"), |
| 6847 | to_underlying (header->abbrev_sect_off), |
| 6848 | to_underlying (header->sect_off), |
| 6849 | filename); |
| 6850 | |
| 6851 | /* Cast to ULONGEST to use 64-bit arithmetic when possible to |
| 6852 | avoid potential 32-bit overflow. */ |
| 6853 | if (((ULONGEST) header->sect_off + get_cu_length (header)) |
| 6854 | > section->size) |
| 6855 | error (_("Dwarf Error: bad length (0x%x) in compilation unit header " |
| 6856 | "(offset 0x%x + 0) [in module %s]"), |
| 6857 | header->length, to_underlying (header->sect_off), |
| 6858 | filename); |
| 6859 | } |
| 6860 | |
| 6861 | /* Read in a CU/TU header and perform some basic error checking. |
| 6862 | The contents of the header are stored in HEADER. |
| 6863 | The result is a pointer to the start of the first DIE. */ |
| 6864 | |
| 6865 | static const gdb_byte * |
| 6866 | read_and_check_comp_unit_head (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 6867 | struct comp_unit_head *header, |
| 6868 | struct dwarf2_section_info *section, |
| 6869 | struct dwarf2_section_info *abbrev_section, |
| 6870 | const gdb_byte *info_ptr, |
| 6871 | rcuh_kind section_kind) |
| 6872 | { |
| 6873 | const gdb_byte *beg_of_comp_unit = info_ptr; |
| 6874 | |
| 6875 | header->sect_off = (sect_offset) (beg_of_comp_unit - section->buffer); |
| 6876 | |
| 6877 | info_ptr = read_comp_unit_head (header, info_ptr, section, section_kind); |
| 6878 | |
| 6879 | header->first_die_cu_offset = (cu_offset) (info_ptr - beg_of_comp_unit); |
| 6880 | |
| 6881 | error_check_comp_unit_head (dwarf2_per_objfile, header, section, |
| 6882 | abbrev_section); |
| 6883 | |
| 6884 | return info_ptr; |
| 6885 | } |
| 6886 | |
| 6887 | /* Fetch the abbreviation table offset from a comp or type unit header. */ |
| 6888 | |
| 6889 | static sect_offset |
| 6890 | read_abbrev_offset (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 6891 | struct dwarf2_section_info *section, |
| 6892 | sect_offset sect_off) |
| 6893 | { |
| 6894 | bfd *abfd = get_section_bfd_owner (section); |
| 6895 | const gdb_byte *info_ptr; |
| 6896 | unsigned int initial_length_size, offset_size; |
| 6897 | uint16_t version; |
| 6898 | |
| 6899 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); |
| 6900 | info_ptr = section->buffer + to_underlying (sect_off); |
| 6901 | read_initial_length (abfd, info_ptr, &initial_length_size); |
| 6902 | offset_size = initial_length_size == 4 ? 4 : 8; |
| 6903 | info_ptr += initial_length_size; |
| 6904 | |
| 6905 | version = read_2_bytes (abfd, info_ptr); |
| 6906 | info_ptr += 2; |
| 6907 | if (version >= 5) |
| 6908 | { |
| 6909 | /* Skip unit type and address size. */ |
| 6910 | info_ptr += 2; |
| 6911 | } |
| 6912 | |
| 6913 | return (sect_offset) read_offset_1 (abfd, info_ptr, offset_size); |
| 6914 | } |
| 6915 | |
| 6916 | /* Allocate a new partial symtab for file named NAME and mark this new |
| 6917 | partial symtab as being an include of PST. */ |
| 6918 | |
| 6919 | static void |
| 6920 | dwarf2_create_include_psymtab (const char *name, struct partial_symtab *pst, |
| 6921 | struct objfile *objfile) |
| 6922 | { |
| 6923 | struct partial_symtab *subpst = allocate_psymtab (name, objfile); |
| 6924 | |
| 6925 | if (!IS_ABSOLUTE_PATH (subpst->filename)) |
| 6926 | { |
| 6927 | /* It shares objfile->objfile_obstack. */ |
| 6928 | subpst->dirname = pst->dirname; |
| 6929 | } |
| 6930 | |
| 6931 | subpst->textlow = 0; |
| 6932 | subpst->texthigh = 0; |
| 6933 | |
| 6934 | subpst->dependencies |
| 6935 | = XOBNEW (&objfile->objfile_obstack, struct partial_symtab *); |
| 6936 | subpst->dependencies[0] = pst; |
| 6937 | subpst->number_of_dependencies = 1; |
| 6938 | |
| 6939 | subpst->globals_offset = 0; |
| 6940 | subpst->n_global_syms = 0; |
| 6941 | subpst->statics_offset = 0; |
| 6942 | subpst->n_static_syms = 0; |
| 6943 | subpst->compunit_symtab = NULL; |
| 6944 | subpst->read_symtab = pst->read_symtab; |
| 6945 | subpst->readin = 0; |
| 6946 | |
| 6947 | /* No private part is necessary for include psymtabs. This property |
| 6948 | can be used to differentiate between such include psymtabs and |
| 6949 | the regular ones. */ |
| 6950 | subpst->read_symtab_private = NULL; |
| 6951 | } |
| 6952 | |
| 6953 | /* Read the Line Number Program data and extract the list of files |
| 6954 | included by the source file represented by PST. Build an include |
| 6955 | partial symtab for each of these included files. */ |
| 6956 | |
| 6957 | static void |
| 6958 | dwarf2_build_include_psymtabs (struct dwarf2_cu *cu, |
| 6959 | struct die_info *die, |
| 6960 | struct partial_symtab *pst) |
| 6961 | { |
| 6962 | line_header_up lh; |
| 6963 | struct attribute *attr; |
| 6964 | |
| 6965 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
| 6966 | if (attr) |
| 6967 | lh = dwarf_decode_line_header ((sect_offset) DW_UNSND (attr), cu); |
| 6968 | if (lh == NULL) |
| 6969 | return; /* No linetable, so no includes. */ |
| 6970 | |
| 6971 | /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */ |
| 6972 | dwarf_decode_lines (lh.get (), pst->dirname, cu, pst, pst->textlow, 1); |
| 6973 | } |
| 6974 | |
| 6975 | static hashval_t |
| 6976 | hash_signatured_type (const void *item) |
| 6977 | { |
| 6978 | const struct signatured_type *sig_type |
| 6979 | = (const struct signatured_type *) item; |
| 6980 | |
| 6981 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
| 6982 | return sig_type->signature; |
| 6983 | } |
| 6984 | |
| 6985 | static int |
| 6986 | eq_signatured_type (const void *item_lhs, const void *item_rhs) |
| 6987 | { |
| 6988 | const struct signatured_type *lhs = (const struct signatured_type *) item_lhs; |
| 6989 | const struct signatured_type *rhs = (const struct signatured_type *) item_rhs; |
| 6990 | |
| 6991 | return lhs->signature == rhs->signature; |
| 6992 | } |
| 6993 | |
| 6994 | /* Allocate a hash table for signatured types. */ |
| 6995 | |
| 6996 | static htab_t |
| 6997 | allocate_signatured_type_table (struct objfile *objfile) |
| 6998 | { |
| 6999 | return htab_create_alloc_ex (41, |
| 7000 | hash_signatured_type, |
| 7001 | eq_signatured_type, |
| 7002 | NULL, |
| 7003 | &objfile->objfile_obstack, |
| 7004 | hashtab_obstack_allocate, |
| 7005 | dummy_obstack_deallocate); |
| 7006 | } |
| 7007 | |
| 7008 | /* A helper function to add a signatured type CU to a table. */ |
| 7009 | |
| 7010 | static int |
| 7011 | add_signatured_type_cu_to_table (void **slot, void *datum) |
| 7012 | { |
| 7013 | struct signatured_type *sigt = (struct signatured_type *) *slot; |
| 7014 | struct signatured_type ***datap = (struct signatured_type ***) datum; |
| 7015 | |
| 7016 | **datap = sigt; |
| 7017 | ++*datap; |
| 7018 | |
| 7019 | return 1; |
| 7020 | } |
| 7021 | |
| 7022 | /* A helper for create_debug_types_hash_table. Read types from SECTION |
| 7023 | and fill them into TYPES_HTAB. It will process only type units, |
| 7024 | therefore DW_UT_type. */ |
| 7025 | |
| 7026 | static void |
| 7027 | create_debug_type_hash_table (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 7028 | struct dwo_file *dwo_file, |
| 7029 | dwarf2_section_info *section, htab_t &types_htab, |
| 7030 | rcuh_kind section_kind) |
| 7031 | { |
| 7032 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 7033 | struct dwarf2_section_info *abbrev_section; |
| 7034 | bfd *abfd; |
| 7035 | const gdb_byte *info_ptr, *end_ptr; |
| 7036 | |
| 7037 | abbrev_section = (dwo_file != NULL |
| 7038 | ? &dwo_file->sections.abbrev |
| 7039 | : &dwarf2_per_objfile->abbrev); |
| 7040 | |
| 7041 | if (dwarf_read_debug) |
| 7042 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n", |
| 7043 | get_section_name (section), |
| 7044 | get_section_file_name (abbrev_section)); |
| 7045 | |
| 7046 | dwarf2_read_section (objfile, section); |
| 7047 | info_ptr = section->buffer; |
| 7048 | |
| 7049 | if (info_ptr == NULL) |
| 7050 | return; |
| 7051 | |
| 7052 | /* We can't set abfd until now because the section may be empty or |
| 7053 | not present, in which case the bfd is unknown. */ |
| 7054 | abfd = get_section_bfd_owner (section); |
| 7055 | |
| 7056 | /* We don't use init_cutu_and_read_dies_simple, or some such, here |
| 7057 | because we don't need to read any dies: the signature is in the |
| 7058 | header. */ |
| 7059 | |
| 7060 | end_ptr = info_ptr + section->size; |
| 7061 | while (info_ptr < end_ptr) |
| 7062 | { |
| 7063 | struct signatured_type *sig_type; |
| 7064 | struct dwo_unit *dwo_tu; |
| 7065 | void **slot; |
| 7066 | const gdb_byte *ptr = info_ptr; |
| 7067 | struct comp_unit_head header; |
| 7068 | unsigned int length; |
| 7069 | |
| 7070 | sect_offset sect_off = (sect_offset) (ptr - section->buffer); |
| 7071 | |
| 7072 | /* Initialize it due to a false compiler warning. */ |
| 7073 | header.signature = -1; |
| 7074 | header.type_cu_offset_in_tu = (cu_offset) -1; |
| 7075 | |
| 7076 | /* We need to read the type's signature in order to build the hash |
| 7077 | table, but we don't need anything else just yet. */ |
| 7078 | |
| 7079 | ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, &header, section, |
| 7080 | abbrev_section, ptr, section_kind); |
| 7081 | |
| 7082 | length = get_cu_length (&header); |
| 7083 | |
| 7084 | /* Skip dummy type units. */ |
| 7085 | if (ptr >= info_ptr + length |
| 7086 | || peek_abbrev_code (abfd, ptr) == 0 |
| 7087 | || header.unit_type != DW_UT_type) |
| 7088 | { |
| 7089 | info_ptr += length; |
| 7090 | continue; |
| 7091 | } |
| 7092 | |
| 7093 | if (types_htab == NULL) |
| 7094 | { |
| 7095 | if (dwo_file) |
| 7096 | types_htab = allocate_dwo_unit_table (objfile); |
| 7097 | else |
| 7098 | types_htab = allocate_signatured_type_table (objfile); |
| 7099 | } |
| 7100 | |
| 7101 | if (dwo_file) |
| 7102 | { |
| 7103 | sig_type = NULL; |
| 7104 | dwo_tu = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
| 7105 | struct dwo_unit); |
| 7106 | dwo_tu->dwo_file = dwo_file; |
| 7107 | dwo_tu->signature = header.signature; |
| 7108 | dwo_tu->type_offset_in_tu = header.type_cu_offset_in_tu; |
| 7109 | dwo_tu->section = section; |
| 7110 | dwo_tu->sect_off = sect_off; |
| 7111 | dwo_tu->length = length; |
| 7112 | } |
| 7113 | else |
| 7114 | { |
| 7115 | /* N.B.: type_offset is not usable if this type uses a DWO file. |
| 7116 | The real type_offset is in the DWO file. */ |
| 7117 | dwo_tu = NULL; |
| 7118 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
| 7119 | struct signatured_type); |
| 7120 | sig_type->signature = header.signature; |
| 7121 | sig_type->type_offset_in_tu = header.type_cu_offset_in_tu; |
| 7122 | sig_type->per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
| 7123 | sig_type->per_cu.is_debug_types = 1; |
| 7124 | sig_type->per_cu.section = section; |
| 7125 | sig_type->per_cu.sect_off = sect_off; |
| 7126 | sig_type->per_cu.length = length; |
| 7127 | } |
| 7128 | |
| 7129 | slot = htab_find_slot (types_htab, |
| 7130 | dwo_file ? (void*) dwo_tu : (void *) sig_type, |
| 7131 | INSERT); |
| 7132 | gdb_assert (slot != NULL); |
| 7133 | if (*slot != NULL) |
| 7134 | { |
| 7135 | sect_offset dup_sect_off; |
| 7136 | |
| 7137 | if (dwo_file) |
| 7138 | { |
| 7139 | const struct dwo_unit *dup_tu |
| 7140 | = (const struct dwo_unit *) *slot; |
| 7141 | |
| 7142 | dup_sect_off = dup_tu->sect_off; |
| 7143 | } |
| 7144 | else |
| 7145 | { |
| 7146 | const struct signatured_type *dup_tu |
| 7147 | = (const struct signatured_type *) *slot; |
| 7148 | |
| 7149 | dup_sect_off = dup_tu->per_cu.sect_off; |
| 7150 | } |
| 7151 | |
| 7152 | complaint (&symfile_complaints, |
| 7153 | _("debug type entry at offset 0x%x is duplicate to" |
| 7154 | " the entry at offset 0x%x, signature %s"), |
| 7155 | to_underlying (sect_off), to_underlying (dup_sect_off), |
| 7156 | hex_string (header.signature)); |
| 7157 | } |
| 7158 | *slot = dwo_file ? (void *) dwo_tu : (void *) sig_type; |
| 7159 | |
| 7160 | if (dwarf_read_debug > 1) |
| 7161 | fprintf_unfiltered (gdb_stdlog, " offset 0x%x, signature %s\n", |
| 7162 | to_underlying (sect_off), |
| 7163 | hex_string (header.signature)); |
| 7164 | |
| 7165 | info_ptr += length; |
| 7166 | } |
| 7167 | } |
| 7168 | |
| 7169 | /* Create the hash table of all entries in the .debug_types |
| 7170 | (or .debug_types.dwo) section(s). |
| 7171 | If reading a DWO file, then DWO_FILE is a pointer to the DWO file object, |
| 7172 | otherwise it is NULL. |
| 7173 | |
| 7174 | The result is a pointer to the hash table or NULL if there are no types. |
| 7175 | |
| 7176 | Note: This function processes DWO files only, not DWP files. */ |
| 7177 | |
| 7178 | static void |
| 7179 | create_debug_types_hash_table (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 7180 | struct dwo_file *dwo_file, |
| 7181 | VEC (dwarf2_section_info_def) *types, |
| 7182 | htab_t &types_htab) |
| 7183 | { |
| 7184 | int ix; |
| 7185 | struct dwarf2_section_info *section; |
| 7186 | |
| 7187 | if (VEC_empty (dwarf2_section_info_def, types)) |
| 7188 | return; |
| 7189 | |
| 7190 | for (ix = 0; |
| 7191 | VEC_iterate (dwarf2_section_info_def, types, ix, section); |
| 7192 | ++ix) |
| 7193 | create_debug_type_hash_table (dwarf2_per_objfile, dwo_file, section, |
| 7194 | types_htab, rcuh_kind::TYPE); |
| 7195 | } |
| 7196 | |
| 7197 | /* Create the hash table of all entries in the .debug_types section, |
| 7198 | and initialize all_type_units. |
| 7199 | The result is zero if there is an error (e.g. missing .debug_types section), |
| 7200 | otherwise non-zero. */ |
| 7201 | |
| 7202 | static int |
| 7203 | create_all_type_units (struct dwarf2_per_objfile *dwarf2_per_objfile) |
| 7204 | { |
| 7205 | htab_t types_htab = NULL; |
| 7206 | struct signatured_type **iter; |
| 7207 | |
| 7208 | create_debug_type_hash_table (dwarf2_per_objfile, NULL, |
| 7209 | &dwarf2_per_objfile->info, types_htab, |
| 7210 | rcuh_kind::COMPILE); |
| 7211 | create_debug_types_hash_table (dwarf2_per_objfile, NULL, |
| 7212 | dwarf2_per_objfile->types, types_htab); |
| 7213 | if (types_htab == NULL) |
| 7214 | { |
| 7215 | dwarf2_per_objfile->signatured_types = NULL; |
| 7216 | return 0; |
| 7217 | } |
| 7218 | |
| 7219 | dwarf2_per_objfile->signatured_types = types_htab; |
| 7220 | |
| 7221 | dwarf2_per_objfile->n_type_units |
| 7222 | = dwarf2_per_objfile->n_allocated_type_units |
| 7223 | = htab_elements (types_htab); |
| 7224 | dwarf2_per_objfile->all_type_units = |
| 7225 | XNEWVEC (struct signatured_type *, dwarf2_per_objfile->n_type_units); |
| 7226 | iter = &dwarf2_per_objfile->all_type_units[0]; |
| 7227 | htab_traverse_noresize (types_htab, add_signatured_type_cu_to_table, &iter); |
| 7228 | gdb_assert (iter - &dwarf2_per_objfile->all_type_units[0] |
| 7229 | == dwarf2_per_objfile->n_type_units); |
| 7230 | |
| 7231 | return 1; |
| 7232 | } |
| 7233 | |
| 7234 | /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types. |
| 7235 | If SLOT is non-NULL, it is the entry to use in the hash table. |
| 7236 | Otherwise we find one. */ |
| 7237 | |
| 7238 | static struct signatured_type * |
| 7239 | add_type_unit (struct dwarf2_per_objfile *dwarf2_per_objfile, ULONGEST sig, |
| 7240 | void **slot) |
| 7241 | { |
| 7242 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 7243 | int n_type_units = dwarf2_per_objfile->n_type_units; |
| 7244 | struct signatured_type *sig_type; |
| 7245 | |
| 7246 | gdb_assert (n_type_units <= dwarf2_per_objfile->n_allocated_type_units); |
| 7247 | ++n_type_units; |
| 7248 | if (n_type_units > dwarf2_per_objfile->n_allocated_type_units) |
| 7249 | { |
| 7250 | if (dwarf2_per_objfile->n_allocated_type_units == 0) |
| 7251 | dwarf2_per_objfile->n_allocated_type_units = 1; |
| 7252 | dwarf2_per_objfile->n_allocated_type_units *= 2; |
| 7253 | dwarf2_per_objfile->all_type_units |
| 7254 | = XRESIZEVEC (struct signatured_type *, |
| 7255 | dwarf2_per_objfile->all_type_units, |
| 7256 | dwarf2_per_objfile->n_allocated_type_units); |
| 7257 | ++dwarf2_per_objfile->tu_stats.nr_all_type_units_reallocs; |
| 7258 | } |
| 7259 | dwarf2_per_objfile->n_type_units = n_type_units; |
| 7260 | |
| 7261 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
| 7262 | struct signatured_type); |
| 7263 | dwarf2_per_objfile->all_type_units[n_type_units - 1] = sig_type; |
| 7264 | sig_type->signature = sig; |
| 7265 | sig_type->per_cu.is_debug_types = 1; |
| 7266 | if (dwarf2_per_objfile->using_index) |
| 7267 | { |
| 7268 | sig_type->per_cu.v.quick = |
| 7269 | OBSTACK_ZALLOC (&objfile->objfile_obstack, |
| 7270 | struct dwarf2_per_cu_quick_data); |
| 7271 | } |
| 7272 | |
| 7273 | if (slot == NULL) |
| 7274 | { |
| 7275 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, |
| 7276 | sig_type, INSERT); |
| 7277 | } |
| 7278 | gdb_assert (*slot == NULL); |
| 7279 | *slot = sig_type; |
| 7280 | /* The rest of sig_type must be filled in by the caller. */ |
| 7281 | return sig_type; |
| 7282 | } |
| 7283 | |
| 7284 | /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type. |
| 7285 | Fill in SIG_ENTRY with DWO_ENTRY. */ |
| 7286 | |
| 7287 | static void |
| 7288 | fill_in_sig_entry_from_dwo_entry (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 7289 | struct signatured_type *sig_entry, |
| 7290 | struct dwo_unit *dwo_entry) |
| 7291 | { |
| 7292 | /* Make sure we're not clobbering something we don't expect to. */ |
| 7293 | gdb_assert (! sig_entry->per_cu.queued); |
| 7294 | gdb_assert (sig_entry->per_cu.cu == NULL); |
| 7295 | if (dwarf2_per_objfile->using_index) |
| 7296 | { |
| 7297 | gdb_assert (sig_entry->per_cu.v.quick != NULL); |
| 7298 | gdb_assert (sig_entry->per_cu.v.quick->compunit_symtab == NULL); |
| 7299 | } |
| 7300 | else |
| 7301 | gdb_assert (sig_entry->per_cu.v.psymtab == NULL); |
| 7302 | gdb_assert (sig_entry->signature == dwo_entry->signature); |
| 7303 | gdb_assert (to_underlying (sig_entry->type_offset_in_section) == 0); |
| 7304 | gdb_assert (sig_entry->type_unit_group == NULL); |
| 7305 | gdb_assert (sig_entry->dwo_unit == NULL); |
| 7306 | |
| 7307 | sig_entry->per_cu.section = dwo_entry->section; |
| 7308 | sig_entry->per_cu.sect_off = dwo_entry->sect_off; |
| 7309 | sig_entry->per_cu.length = dwo_entry->length; |
| 7310 | sig_entry->per_cu.reading_dwo_directly = 1; |
| 7311 | sig_entry->per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
| 7312 | sig_entry->type_offset_in_tu = dwo_entry->type_offset_in_tu; |
| 7313 | sig_entry->dwo_unit = dwo_entry; |
| 7314 | } |
| 7315 | |
| 7316 | /* Subroutine of lookup_signatured_type. |
| 7317 | If we haven't read the TU yet, create the signatured_type data structure |
| 7318 | for a TU to be read in directly from a DWO file, bypassing the stub. |
| 7319 | This is the "Stay in DWO Optimization": When there is no DWP file and we're |
| 7320 | using .gdb_index, then when reading a CU we want to stay in the DWO file |
| 7321 | containing that CU. Otherwise we could end up reading several other DWO |
| 7322 | files (due to comdat folding) to process the transitive closure of all the |
| 7323 | mentioned TUs, and that can be slow. The current DWO file will have every |
| 7324 | type signature that it needs. |
| 7325 | We only do this for .gdb_index because in the psymtab case we already have |
| 7326 | to read all the DWOs to build the type unit groups. */ |
| 7327 | |
| 7328 | static struct signatured_type * |
| 7329 | lookup_dwo_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) |
| 7330 | { |
| 7331 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 7332 | = cu->per_cu->dwarf2_per_objfile; |
| 7333 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 7334 | struct dwo_file *dwo_file; |
| 7335 | struct dwo_unit find_dwo_entry, *dwo_entry; |
| 7336 | struct signatured_type find_sig_entry, *sig_entry; |
| 7337 | void **slot; |
| 7338 | |
| 7339 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); |
| 7340 | |
| 7341 | /* If TU skeletons have been removed then we may not have read in any |
| 7342 | TUs yet. */ |
| 7343 | if (dwarf2_per_objfile->signatured_types == NULL) |
| 7344 | { |
| 7345 | dwarf2_per_objfile->signatured_types |
| 7346 | = allocate_signatured_type_table (objfile); |
| 7347 | } |
| 7348 | |
| 7349 | /* We only ever need to read in one copy of a signatured type. |
| 7350 | Use the global signatured_types array to do our own comdat-folding |
| 7351 | of types. If this is the first time we're reading this TU, and |
| 7352 | the TU has an entry in .gdb_index, replace the recorded data from |
| 7353 | .gdb_index with this TU. */ |
| 7354 | |
| 7355 | find_sig_entry.signature = sig; |
| 7356 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, |
| 7357 | &find_sig_entry, INSERT); |
| 7358 | sig_entry = (struct signatured_type *) *slot; |
| 7359 | |
| 7360 | /* We can get here with the TU already read, *or* in the process of being |
| 7361 | read. Don't reassign the global entry to point to this DWO if that's |
| 7362 | the case. Also note that if the TU is already being read, it may not |
| 7363 | have come from a DWO, the program may be a mix of Fission-compiled |
| 7364 | code and non-Fission-compiled code. */ |
| 7365 | |
| 7366 | /* Have we already tried to read this TU? |
| 7367 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it |
| 7368 | needn't exist in the global table yet). */ |
| 7369 | if (sig_entry != NULL && sig_entry->per_cu.tu_read) |
| 7370 | return sig_entry; |
| 7371 | |
| 7372 | /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the |
| 7373 | dwo_unit of the TU itself. */ |
| 7374 | dwo_file = cu->dwo_unit->dwo_file; |
| 7375 | |
| 7376 | /* Ok, this is the first time we're reading this TU. */ |
| 7377 | if (dwo_file->tus == NULL) |
| 7378 | return NULL; |
| 7379 | find_dwo_entry.signature = sig; |
| 7380 | dwo_entry = (struct dwo_unit *) htab_find (dwo_file->tus, &find_dwo_entry); |
| 7381 | if (dwo_entry == NULL) |
| 7382 | return NULL; |
| 7383 | |
| 7384 | /* If the global table doesn't have an entry for this TU, add one. */ |
| 7385 | if (sig_entry == NULL) |
| 7386 | sig_entry = add_type_unit (dwarf2_per_objfile, sig, slot); |
| 7387 | |
| 7388 | fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile, sig_entry, dwo_entry); |
| 7389 | sig_entry->per_cu.tu_read = 1; |
| 7390 | return sig_entry; |
| 7391 | } |
| 7392 | |
| 7393 | /* Subroutine of lookup_signatured_type. |
| 7394 | Look up the type for signature SIG, and if we can't find SIG in .gdb_index |
| 7395 | then try the DWP file. If the TU stub (skeleton) has been removed then |
| 7396 | it won't be in .gdb_index. */ |
| 7397 | |
| 7398 | static struct signatured_type * |
| 7399 | lookup_dwp_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) |
| 7400 | { |
| 7401 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 7402 | = cu->per_cu->dwarf2_per_objfile; |
| 7403 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 7404 | struct dwp_file *dwp_file = get_dwp_file (dwarf2_per_objfile); |
| 7405 | struct dwo_unit *dwo_entry; |
| 7406 | struct signatured_type find_sig_entry, *sig_entry; |
| 7407 | void **slot; |
| 7408 | |
| 7409 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); |
| 7410 | gdb_assert (dwp_file != NULL); |
| 7411 | |
| 7412 | /* If TU skeletons have been removed then we may not have read in any |
| 7413 | TUs yet. */ |
| 7414 | if (dwarf2_per_objfile->signatured_types == NULL) |
| 7415 | { |
| 7416 | dwarf2_per_objfile->signatured_types |
| 7417 | = allocate_signatured_type_table (objfile); |
| 7418 | } |
| 7419 | |
| 7420 | find_sig_entry.signature = sig; |
| 7421 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, |
| 7422 | &find_sig_entry, INSERT); |
| 7423 | sig_entry = (struct signatured_type *) *slot; |
| 7424 | |
| 7425 | /* Have we already tried to read this TU? |
| 7426 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it |
| 7427 | needn't exist in the global table yet). */ |
| 7428 | if (sig_entry != NULL) |
| 7429 | return sig_entry; |
| 7430 | |
| 7431 | if (dwp_file->tus == NULL) |
| 7432 | return NULL; |
| 7433 | dwo_entry = lookup_dwo_unit_in_dwp (dwarf2_per_objfile, dwp_file, NULL, |
| 7434 | sig, 1 /* is_debug_types */); |
| 7435 | if (dwo_entry == NULL) |
| 7436 | return NULL; |
| 7437 | |
| 7438 | sig_entry = add_type_unit (dwarf2_per_objfile, sig, slot); |
| 7439 | fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile, sig_entry, dwo_entry); |
| 7440 | |
| 7441 | return sig_entry; |
| 7442 | } |
| 7443 | |
| 7444 | /* Lookup a signature based type for DW_FORM_ref_sig8. |
| 7445 | Returns NULL if signature SIG is not present in the table. |
| 7446 | It is up to the caller to complain about this. */ |
| 7447 | |
| 7448 | static struct signatured_type * |
| 7449 | lookup_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) |
| 7450 | { |
| 7451 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 7452 | = cu->per_cu->dwarf2_per_objfile; |
| 7453 | |
| 7454 | if (cu->dwo_unit |
| 7455 | && dwarf2_per_objfile->using_index) |
| 7456 | { |
| 7457 | /* We're in a DWO/DWP file, and we're using .gdb_index. |
| 7458 | These cases require special processing. */ |
| 7459 | if (get_dwp_file (dwarf2_per_objfile) == NULL) |
| 7460 | return lookup_dwo_signatured_type (cu, sig); |
| 7461 | else |
| 7462 | return lookup_dwp_signatured_type (cu, sig); |
| 7463 | } |
| 7464 | else |
| 7465 | { |
| 7466 | struct signatured_type find_entry, *entry; |
| 7467 | |
| 7468 | if (dwarf2_per_objfile->signatured_types == NULL) |
| 7469 | return NULL; |
| 7470 | find_entry.signature = sig; |
| 7471 | entry = ((struct signatured_type *) |
| 7472 | htab_find (dwarf2_per_objfile->signatured_types, &find_entry)); |
| 7473 | return entry; |
| 7474 | } |
| 7475 | } |
| 7476 | \f |
| 7477 | /* Low level DIE reading support. */ |
| 7478 | |
| 7479 | /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */ |
| 7480 | |
| 7481 | static void |
| 7482 | init_cu_die_reader (struct die_reader_specs *reader, |
| 7483 | struct dwarf2_cu *cu, |
| 7484 | struct dwarf2_section_info *section, |
| 7485 | struct dwo_file *dwo_file, |
| 7486 | struct abbrev_table *abbrev_table) |
| 7487 | { |
| 7488 | gdb_assert (section->readin && section->buffer != NULL); |
| 7489 | reader->abfd = get_section_bfd_owner (section); |
| 7490 | reader->cu = cu; |
| 7491 | reader->dwo_file = dwo_file; |
| 7492 | reader->die_section = section; |
| 7493 | reader->buffer = section->buffer; |
| 7494 | reader->buffer_end = section->buffer + section->size; |
| 7495 | reader->comp_dir = NULL; |
| 7496 | reader->abbrev_table = abbrev_table; |
| 7497 | } |
| 7498 | |
| 7499 | /* Subroutine of init_cutu_and_read_dies to simplify it. |
| 7500 | Read in the rest of a CU/TU top level DIE from DWO_UNIT. |
| 7501 | There's just a lot of work to do, and init_cutu_and_read_dies is big enough |
| 7502 | already. |
| 7503 | |
| 7504 | STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes |
| 7505 | from it to the DIE in the DWO. If NULL we are skipping the stub. |
| 7506 | STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly |
| 7507 | from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir |
| 7508 | attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and |
| 7509 | STUB_COMP_DIR may be non-NULL. |
| 7510 | *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN |
| 7511 | are filled in with the info of the DIE from the DWO file. |
| 7512 | *RESULT_DWO_ABBREV_TABLE will be filled in with the abbrev table allocated |
| 7513 | from the dwo. Since *RESULT_READER references this abbrev table, it must be |
| 7514 | kept around for at least as long as *RESULT_READER. |
| 7515 | |
| 7516 | The result is non-zero if a valid (non-dummy) DIE was found. */ |
| 7517 | |
| 7518 | static int |
| 7519 | read_cutu_die_from_dwo (struct dwarf2_per_cu_data *this_cu, |
| 7520 | struct dwo_unit *dwo_unit, |
| 7521 | struct die_info *stub_comp_unit_die, |
| 7522 | const char *stub_comp_dir, |
| 7523 | struct die_reader_specs *result_reader, |
| 7524 | const gdb_byte **result_info_ptr, |
| 7525 | struct die_info **result_comp_unit_die, |
| 7526 | int *result_has_children, |
| 7527 | abbrev_table_up *result_dwo_abbrev_table) |
| 7528 | { |
| 7529 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_cu->dwarf2_per_objfile; |
| 7530 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 7531 | struct dwarf2_cu *cu = this_cu->cu; |
| 7532 | bfd *abfd; |
| 7533 | const gdb_byte *begin_info_ptr, *info_ptr; |
| 7534 | struct attribute *comp_dir, *stmt_list, *low_pc, *high_pc, *ranges; |
| 7535 | int i,num_extra_attrs; |
| 7536 | struct dwarf2_section_info *dwo_abbrev_section; |
| 7537 | struct attribute *attr; |
| 7538 | struct die_info *comp_unit_die; |
| 7539 | |
| 7540 | /* At most one of these may be provided. */ |
| 7541 | gdb_assert ((stub_comp_unit_die != NULL) + (stub_comp_dir != NULL) <= 1); |
| 7542 | |
| 7543 | /* These attributes aren't processed until later: |
| 7544 | DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges. |
| 7545 | DW_AT_comp_dir is used now, to find the DWO file, but it is also |
| 7546 | referenced later. However, these attributes are found in the stub |
| 7547 | which we won't have later. In order to not impose this complication |
| 7548 | on the rest of the code, we read them here and copy them to the |
| 7549 | DWO CU/TU die. */ |
| 7550 | |
| 7551 | stmt_list = NULL; |
| 7552 | low_pc = NULL; |
| 7553 | high_pc = NULL; |
| 7554 | ranges = NULL; |
| 7555 | comp_dir = NULL; |
| 7556 | |
| 7557 | if (stub_comp_unit_die != NULL) |
| 7558 | { |
| 7559 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the |
| 7560 | DWO file. */ |
| 7561 | if (! this_cu->is_debug_types) |
| 7562 | stmt_list = dwarf2_attr (stub_comp_unit_die, DW_AT_stmt_list, cu); |
| 7563 | low_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_low_pc, cu); |
| 7564 | high_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_high_pc, cu); |
| 7565 | ranges = dwarf2_attr (stub_comp_unit_die, DW_AT_ranges, cu); |
| 7566 | comp_dir = dwarf2_attr (stub_comp_unit_die, DW_AT_comp_dir, cu); |
| 7567 | |
| 7568 | /* There should be a DW_AT_addr_base attribute here (if needed). |
| 7569 | We need the value before we can process DW_FORM_GNU_addr_index. */ |
| 7570 | cu->addr_base = 0; |
| 7571 | attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_addr_base, cu); |
| 7572 | if (attr) |
| 7573 | cu->addr_base = DW_UNSND (attr); |
| 7574 | |
| 7575 | /* There should be a DW_AT_ranges_base attribute here (if needed). |
| 7576 | We need the value before we can process DW_AT_ranges. */ |
| 7577 | cu->ranges_base = 0; |
| 7578 | attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_ranges_base, cu); |
| 7579 | if (attr) |
| 7580 | cu->ranges_base = DW_UNSND (attr); |
| 7581 | } |
| 7582 | else if (stub_comp_dir != NULL) |
| 7583 | { |
| 7584 | /* Reconstruct the comp_dir attribute to simplify the code below. */ |
| 7585 | comp_dir = XOBNEW (&cu->comp_unit_obstack, struct attribute); |
| 7586 | comp_dir->name = DW_AT_comp_dir; |
| 7587 | comp_dir->form = DW_FORM_string; |
| 7588 | DW_STRING_IS_CANONICAL (comp_dir) = 0; |
| 7589 | DW_STRING (comp_dir) = stub_comp_dir; |
| 7590 | } |
| 7591 | |
| 7592 | /* Set up for reading the DWO CU/TU. */ |
| 7593 | cu->dwo_unit = dwo_unit; |
| 7594 | dwarf2_section_info *section = dwo_unit->section; |
| 7595 | dwarf2_read_section (objfile, section); |
| 7596 | abfd = get_section_bfd_owner (section); |
| 7597 | begin_info_ptr = info_ptr = (section->buffer |
| 7598 | + to_underlying (dwo_unit->sect_off)); |
| 7599 | dwo_abbrev_section = &dwo_unit->dwo_file->sections.abbrev; |
| 7600 | |
| 7601 | if (this_cu->is_debug_types) |
| 7602 | { |
| 7603 | struct signatured_type *sig_type = (struct signatured_type *) this_cu; |
| 7604 | |
| 7605 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
| 7606 | &cu->header, section, |
| 7607 | dwo_abbrev_section, |
| 7608 | info_ptr, rcuh_kind::TYPE); |
| 7609 | /* This is not an assert because it can be caused by bad debug info. */ |
| 7610 | if (sig_type->signature != cu->header.signature) |
| 7611 | { |
| 7612 | error (_("Dwarf Error: signature mismatch %s vs %s while reading" |
| 7613 | " TU at offset 0x%x [in module %s]"), |
| 7614 | hex_string (sig_type->signature), |
| 7615 | hex_string (cu->header.signature), |
| 7616 | to_underlying (dwo_unit->sect_off), |
| 7617 | bfd_get_filename (abfd)); |
| 7618 | } |
| 7619 | gdb_assert (dwo_unit->sect_off == cu->header.sect_off); |
| 7620 | /* For DWOs coming from DWP files, we don't know the CU length |
| 7621 | nor the type's offset in the TU until now. */ |
| 7622 | dwo_unit->length = get_cu_length (&cu->header); |
| 7623 | dwo_unit->type_offset_in_tu = cu->header.type_cu_offset_in_tu; |
| 7624 | |
| 7625 | /* Establish the type offset that can be used to lookup the type. |
| 7626 | For DWO files, we don't know it until now. */ |
| 7627 | sig_type->type_offset_in_section |
| 7628 | = dwo_unit->sect_off + to_underlying (dwo_unit->type_offset_in_tu); |
| 7629 | } |
| 7630 | else |
| 7631 | { |
| 7632 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
| 7633 | &cu->header, section, |
| 7634 | dwo_abbrev_section, |
| 7635 | info_ptr, rcuh_kind::COMPILE); |
| 7636 | gdb_assert (dwo_unit->sect_off == cu->header.sect_off); |
| 7637 | /* For DWOs coming from DWP files, we don't know the CU length |
| 7638 | until now. */ |
| 7639 | dwo_unit->length = get_cu_length (&cu->header); |
| 7640 | } |
| 7641 | |
| 7642 | *result_dwo_abbrev_table |
| 7643 | = abbrev_table_read_table (dwarf2_per_objfile, dwo_abbrev_section, |
| 7644 | cu->header.abbrev_sect_off); |
| 7645 | init_cu_die_reader (result_reader, cu, section, dwo_unit->dwo_file, |
| 7646 | result_dwo_abbrev_table->get ()); |
| 7647 | |
| 7648 | /* Read in the die, but leave space to copy over the attributes |
| 7649 | from the stub. This has the benefit of simplifying the rest of |
| 7650 | the code - all the work to maintain the illusion of a single |
| 7651 | DW_TAG_{compile,type}_unit DIE is done here. */ |
| 7652 | num_extra_attrs = ((stmt_list != NULL) |
| 7653 | + (low_pc != NULL) |
| 7654 | + (high_pc != NULL) |
| 7655 | + (ranges != NULL) |
| 7656 | + (comp_dir != NULL)); |
| 7657 | info_ptr = read_full_die_1 (result_reader, result_comp_unit_die, info_ptr, |
| 7658 | result_has_children, num_extra_attrs); |
| 7659 | |
| 7660 | /* Copy over the attributes from the stub to the DIE we just read in. */ |
| 7661 | comp_unit_die = *result_comp_unit_die; |
| 7662 | i = comp_unit_die->num_attrs; |
| 7663 | if (stmt_list != NULL) |
| 7664 | comp_unit_die->attrs[i++] = *stmt_list; |
| 7665 | if (low_pc != NULL) |
| 7666 | comp_unit_die->attrs[i++] = *low_pc; |
| 7667 | if (high_pc != NULL) |
| 7668 | comp_unit_die->attrs[i++] = *high_pc; |
| 7669 | if (ranges != NULL) |
| 7670 | comp_unit_die->attrs[i++] = *ranges; |
| 7671 | if (comp_dir != NULL) |
| 7672 | comp_unit_die->attrs[i++] = *comp_dir; |
| 7673 | comp_unit_die->num_attrs += num_extra_attrs; |
| 7674 | |
| 7675 | if (dwarf_die_debug) |
| 7676 | { |
| 7677 | fprintf_unfiltered (gdb_stdlog, |
| 7678 | "Read die from %s@0x%x of %s:\n", |
| 7679 | get_section_name (section), |
| 7680 | (unsigned) (begin_info_ptr - section->buffer), |
| 7681 | bfd_get_filename (abfd)); |
| 7682 | dump_die (comp_unit_die, dwarf_die_debug); |
| 7683 | } |
| 7684 | |
| 7685 | /* Save the comp_dir attribute. If there is no DWP file then we'll read |
| 7686 | TUs by skipping the stub and going directly to the entry in the DWO file. |
| 7687 | However, skipping the stub means we won't get DW_AT_comp_dir, so we have |
| 7688 | to get it via circuitous means. Blech. */ |
| 7689 | if (comp_dir != NULL) |
| 7690 | result_reader->comp_dir = DW_STRING (comp_dir); |
| 7691 | |
| 7692 | /* Skip dummy compilation units. */ |
| 7693 | if (info_ptr >= begin_info_ptr + dwo_unit->length |
| 7694 | || peek_abbrev_code (abfd, info_ptr) == 0) |
| 7695 | return 0; |
| 7696 | |
| 7697 | *result_info_ptr = info_ptr; |
| 7698 | return 1; |
| 7699 | } |
| 7700 | |
| 7701 | /* Subroutine of init_cutu_and_read_dies to simplify it. |
| 7702 | Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU. |
| 7703 | Returns NULL if the specified DWO unit cannot be found. */ |
| 7704 | |
| 7705 | static struct dwo_unit * |
| 7706 | lookup_dwo_unit (struct dwarf2_per_cu_data *this_cu, |
| 7707 | struct die_info *comp_unit_die) |
| 7708 | { |
| 7709 | struct dwarf2_cu *cu = this_cu->cu; |
| 7710 | ULONGEST signature; |
| 7711 | struct dwo_unit *dwo_unit; |
| 7712 | const char *comp_dir, *dwo_name; |
| 7713 | |
| 7714 | gdb_assert (cu != NULL); |
| 7715 | |
| 7716 | /* Yeah, we look dwo_name up again, but it simplifies the code. */ |
| 7717 | dwo_name = dwarf2_string_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu); |
| 7718 | comp_dir = dwarf2_string_attr (comp_unit_die, DW_AT_comp_dir, cu); |
| 7719 | |
| 7720 | if (this_cu->is_debug_types) |
| 7721 | { |
| 7722 | struct signatured_type *sig_type; |
| 7723 | |
| 7724 | /* Since this_cu is the first member of struct signatured_type, |
| 7725 | we can go from a pointer to one to a pointer to the other. */ |
| 7726 | sig_type = (struct signatured_type *) this_cu; |
| 7727 | signature = sig_type->signature; |
| 7728 | dwo_unit = lookup_dwo_type_unit (sig_type, dwo_name, comp_dir); |
| 7729 | } |
| 7730 | else |
| 7731 | { |
| 7732 | struct attribute *attr; |
| 7733 | |
| 7734 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); |
| 7735 | if (! attr) |
| 7736 | error (_("Dwarf Error: missing dwo_id for dwo_name %s" |
| 7737 | " [in module %s]"), |
| 7738 | dwo_name, objfile_name (this_cu->dwarf2_per_objfile->objfile)); |
| 7739 | signature = DW_UNSND (attr); |
| 7740 | dwo_unit = lookup_dwo_comp_unit (this_cu, dwo_name, comp_dir, |
| 7741 | signature); |
| 7742 | } |
| 7743 | |
| 7744 | return dwo_unit; |
| 7745 | } |
| 7746 | |
| 7747 | /* Subroutine of init_cutu_and_read_dies to simplify it. |
| 7748 | See it for a description of the parameters. |
| 7749 | Read a TU directly from a DWO file, bypassing the stub. */ |
| 7750 | |
| 7751 | static void |
| 7752 | init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data *this_cu, |
| 7753 | int use_existing_cu, int keep, |
| 7754 | die_reader_func_ftype *die_reader_func, |
| 7755 | void *data) |
| 7756 | { |
| 7757 | std::unique_ptr<dwarf2_cu> new_cu; |
| 7758 | struct signatured_type *sig_type; |
| 7759 | struct die_reader_specs reader; |
| 7760 | const gdb_byte *info_ptr; |
| 7761 | struct die_info *comp_unit_die; |
| 7762 | int has_children; |
| 7763 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_cu->dwarf2_per_objfile; |
| 7764 | |
| 7765 | /* Verify we can do the following downcast, and that we have the |
| 7766 | data we need. */ |
| 7767 | gdb_assert (this_cu->is_debug_types && this_cu->reading_dwo_directly); |
| 7768 | sig_type = (struct signatured_type *) this_cu; |
| 7769 | gdb_assert (sig_type->dwo_unit != NULL); |
| 7770 | |
| 7771 | if (use_existing_cu && this_cu->cu != NULL) |
| 7772 | { |
| 7773 | gdb_assert (this_cu->cu->dwo_unit == sig_type->dwo_unit); |
| 7774 | /* There's no need to do the rereading_dwo_cu handling that |
| 7775 | init_cutu_and_read_dies does since we don't read the stub. */ |
| 7776 | } |
| 7777 | else |
| 7778 | { |
| 7779 | /* If !use_existing_cu, this_cu->cu must be NULL. */ |
| 7780 | gdb_assert (this_cu->cu == NULL); |
| 7781 | new_cu.reset (new dwarf2_cu (this_cu)); |
| 7782 | } |
| 7783 | |
| 7784 | /* A future optimization, if needed, would be to use an existing |
| 7785 | abbrev table. When reading DWOs with skeletonless TUs, all the TUs |
| 7786 | could share abbrev tables. */ |
| 7787 | |
| 7788 | /* The abbreviation table used by READER, this must live at least as long as |
| 7789 | READER. */ |
| 7790 | abbrev_table_up dwo_abbrev_table; |
| 7791 | |
| 7792 | if (read_cutu_die_from_dwo (this_cu, sig_type->dwo_unit, |
| 7793 | NULL /* stub_comp_unit_die */, |
| 7794 | sig_type->dwo_unit->dwo_file->comp_dir, |
| 7795 | &reader, &info_ptr, |
| 7796 | &comp_unit_die, &has_children, |
| 7797 | &dwo_abbrev_table) == 0) |
| 7798 | { |
| 7799 | /* Dummy die. */ |
| 7800 | return; |
| 7801 | } |
| 7802 | |
| 7803 | /* All the "real" work is done here. */ |
| 7804 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); |
| 7805 | |
| 7806 | /* This duplicates the code in init_cutu_and_read_dies, |
| 7807 | but the alternative is making the latter more complex. |
| 7808 | This function is only for the special case of using DWO files directly: |
| 7809 | no point in overly complicating the general case just to handle this. */ |
| 7810 | if (new_cu != NULL && keep) |
| 7811 | { |
| 7812 | /* Link this CU into read_in_chain. */ |
| 7813 | this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; |
| 7814 | dwarf2_per_objfile->read_in_chain = this_cu; |
| 7815 | /* The chain owns it now. */ |
| 7816 | new_cu.release (); |
| 7817 | } |
| 7818 | } |
| 7819 | |
| 7820 | /* Initialize a CU (or TU) and read its DIEs. |
| 7821 | If the CU defers to a DWO file, read the DWO file as well. |
| 7822 | |
| 7823 | ABBREV_TABLE, if non-NULL, is the abbreviation table to use. |
| 7824 | Otherwise the table specified in the comp unit header is read in and used. |
| 7825 | This is an optimization for when we already have the abbrev table. |
| 7826 | |
| 7827 | If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it. |
| 7828 | Otherwise, a new CU is allocated with xmalloc. |
| 7829 | |
| 7830 | If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to |
| 7831 | read_in_chain. Otherwise the dwarf2_cu data is freed at the end. |
| 7832 | |
| 7833 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental |
| 7834 | linker) then DIE_READER_FUNC will not get called. */ |
| 7835 | |
| 7836 | static void |
| 7837 | init_cutu_and_read_dies (struct dwarf2_per_cu_data *this_cu, |
| 7838 | struct abbrev_table *abbrev_table, |
| 7839 | int use_existing_cu, int keep, |
| 7840 | die_reader_func_ftype *die_reader_func, |
| 7841 | void *data) |
| 7842 | { |
| 7843 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_cu->dwarf2_per_objfile; |
| 7844 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 7845 | struct dwarf2_section_info *section = this_cu->section; |
| 7846 | bfd *abfd = get_section_bfd_owner (section); |
| 7847 | struct dwarf2_cu *cu; |
| 7848 | const gdb_byte *begin_info_ptr, *info_ptr; |
| 7849 | struct die_reader_specs reader; |
| 7850 | struct die_info *comp_unit_die; |
| 7851 | int has_children; |
| 7852 | struct attribute *attr; |
| 7853 | struct signatured_type *sig_type = NULL; |
| 7854 | struct dwarf2_section_info *abbrev_section; |
| 7855 | /* Non-zero if CU currently points to a DWO file and we need to |
| 7856 | reread it. When this happens we need to reread the skeleton die |
| 7857 | before we can reread the DWO file (this only applies to CUs, not TUs). */ |
| 7858 | int rereading_dwo_cu = 0; |
| 7859 | |
| 7860 | if (dwarf_die_debug) |
| 7861 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n", |
| 7862 | this_cu->is_debug_types ? "type" : "comp", |
| 7863 | to_underlying (this_cu->sect_off)); |
| 7864 | |
| 7865 | if (use_existing_cu) |
| 7866 | gdb_assert (keep); |
| 7867 | |
| 7868 | /* If we're reading a TU directly from a DWO file, including a virtual DWO |
| 7869 | file (instead of going through the stub), short-circuit all of this. */ |
| 7870 | if (this_cu->reading_dwo_directly) |
| 7871 | { |
| 7872 | /* Narrow down the scope of possibilities to have to understand. */ |
| 7873 | gdb_assert (this_cu->is_debug_types); |
| 7874 | gdb_assert (abbrev_table == NULL); |
| 7875 | init_tu_and_read_dwo_dies (this_cu, use_existing_cu, keep, |
| 7876 | die_reader_func, data); |
| 7877 | return; |
| 7878 | } |
| 7879 | |
| 7880 | /* This is cheap if the section is already read in. */ |
| 7881 | dwarf2_read_section (objfile, section); |
| 7882 | |
| 7883 | begin_info_ptr = info_ptr = section->buffer + to_underlying (this_cu->sect_off); |
| 7884 | |
| 7885 | abbrev_section = get_abbrev_section_for_cu (this_cu); |
| 7886 | |
| 7887 | std::unique_ptr<dwarf2_cu> new_cu; |
| 7888 | if (use_existing_cu && this_cu->cu != NULL) |
| 7889 | { |
| 7890 | cu = this_cu->cu; |
| 7891 | /* If this CU is from a DWO file we need to start over, we need to |
| 7892 | refetch the attributes from the skeleton CU. |
| 7893 | This could be optimized by retrieving those attributes from when we |
| 7894 | were here the first time: the previous comp_unit_die was stored in |
| 7895 | comp_unit_obstack. But there's no data yet that we need this |
| 7896 | optimization. */ |
| 7897 | if (cu->dwo_unit != NULL) |
| 7898 | rereading_dwo_cu = 1; |
| 7899 | } |
| 7900 | else |
| 7901 | { |
| 7902 | /* If !use_existing_cu, this_cu->cu must be NULL. */ |
| 7903 | gdb_assert (this_cu->cu == NULL); |
| 7904 | new_cu.reset (new dwarf2_cu (this_cu)); |
| 7905 | cu = new_cu.get (); |
| 7906 | } |
| 7907 | |
| 7908 | /* Get the header. */ |
| 7909 | if (to_underlying (cu->header.first_die_cu_offset) != 0 && !rereading_dwo_cu) |
| 7910 | { |
| 7911 | /* We already have the header, there's no need to read it in again. */ |
| 7912 | info_ptr += to_underlying (cu->header.first_die_cu_offset); |
| 7913 | } |
| 7914 | else |
| 7915 | { |
| 7916 | if (this_cu->is_debug_types) |
| 7917 | { |
| 7918 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
| 7919 | &cu->header, section, |
| 7920 | abbrev_section, info_ptr, |
| 7921 | rcuh_kind::TYPE); |
| 7922 | |
| 7923 | /* Since per_cu is the first member of struct signatured_type, |
| 7924 | we can go from a pointer to one to a pointer to the other. */ |
| 7925 | sig_type = (struct signatured_type *) this_cu; |
| 7926 | gdb_assert (sig_type->signature == cu->header.signature); |
| 7927 | gdb_assert (sig_type->type_offset_in_tu |
| 7928 | == cu->header.type_cu_offset_in_tu); |
| 7929 | gdb_assert (this_cu->sect_off == cu->header.sect_off); |
| 7930 | |
| 7931 | /* LENGTH has not been set yet for type units if we're |
| 7932 | using .gdb_index. */ |
| 7933 | this_cu->length = get_cu_length (&cu->header); |
| 7934 | |
| 7935 | /* Establish the type offset that can be used to lookup the type. */ |
| 7936 | sig_type->type_offset_in_section = |
| 7937 | this_cu->sect_off + to_underlying (sig_type->type_offset_in_tu); |
| 7938 | |
| 7939 | this_cu->dwarf_version = cu->header.version; |
| 7940 | } |
| 7941 | else |
| 7942 | { |
| 7943 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
| 7944 | &cu->header, section, |
| 7945 | abbrev_section, |
| 7946 | info_ptr, |
| 7947 | rcuh_kind::COMPILE); |
| 7948 | |
| 7949 | gdb_assert (this_cu->sect_off == cu->header.sect_off); |
| 7950 | gdb_assert (this_cu->length == get_cu_length (&cu->header)); |
| 7951 | this_cu->dwarf_version = cu->header.version; |
| 7952 | } |
| 7953 | } |
| 7954 | |
| 7955 | /* Skip dummy compilation units. */ |
| 7956 | if (info_ptr >= begin_info_ptr + this_cu->length |
| 7957 | || peek_abbrev_code (abfd, info_ptr) == 0) |
| 7958 | return; |
| 7959 | |
| 7960 | /* If we don't have them yet, read the abbrevs for this compilation unit. |
| 7961 | And if we need to read them now, make sure they're freed when we're |
| 7962 | done (own the table through ABBREV_TABLE_HOLDER). */ |
| 7963 | abbrev_table_up abbrev_table_holder; |
| 7964 | if (abbrev_table != NULL) |
| 7965 | gdb_assert (cu->header.abbrev_sect_off == abbrev_table->sect_off); |
| 7966 | else |
| 7967 | { |
| 7968 | abbrev_table_holder |
| 7969 | = abbrev_table_read_table (dwarf2_per_objfile, abbrev_section, |
| 7970 | cu->header.abbrev_sect_off); |
| 7971 | abbrev_table = abbrev_table_holder.get (); |
| 7972 | } |
| 7973 | |
| 7974 | /* Read the top level CU/TU die. */ |
| 7975 | init_cu_die_reader (&reader, cu, section, NULL, abbrev_table); |
| 7976 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
| 7977 | |
| 7978 | /* If we are in a DWO stub, process it and then read in the "real" CU/TU |
| 7979 | from the DWO file. read_cutu_die_from_dwo will allocate the abbreviation |
| 7980 | table from the DWO file and pass the ownership over to us. It will be |
| 7981 | referenced from READER, so we must make sure to free it after we're done |
| 7982 | with READER. |
| 7983 | |
| 7984 | Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a |
| 7985 | DWO CU, that this test will fail (the attribute will not be present). */ |
| 7986 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu); |
| 7987 | abbrev_table_up dwo_abbrev_table; |
| 7988 | if (attr) |
| 7989 | { |
| 7990 | struct dwo_unit *dwo_unit; |
| 7991 | struct die_info *dwo_comp_unit_die; |
| 7992 | |
| 7993 | if (has_children) |
| 7994 | { |
| 7995 | complaint (&symfile_complaints, |
| 7996 | _("compilation unit with DW_AT_GNU_dwo_name" |
| 7997 | " has children (offset 0x%x) [in module %s]"), |
| 7998 | to_underlying (this_cu->sect_off), bfd_get_filename (abfd)); |
| 7999 | } |
| 8000 | dwo_unit = lookup_dwo_unit (this_cu, comp_unit_die); |
| 8001 | if (dwo_unit != NULL) |
| 8002 | { |
| 8003 | if (read_cutu_die_from_dwo (this_cu, dwo_unit, |
| 8004 | comp_unit_die, NULL, |
| 8005 | &reader, &info_ptr, |
| 8006 | &dwo_comp_unit_die, &has_children, |
| 8007 | &dwo_abbrev_table) == 0) |
| 8008 | { |
| 8009 | /* Dummy die. */ |
| 8010 | return; |
| 8011 | } |
| 8012 | comp_unit_die = dwo_comp_unit_die; |
| 8013 | } |
| 8014 | else |
| 8015 | { |
| 8016 | /* Yikes, we couldn't find the rest of the DIE, we only have |
| 8017 | the stub. A complaint has already been logged. There's |
| 8018 | not much more we can do except pass on the stub DIE to |
| 8019 | die_reader_func. We don't want to throw an error on bad |
| 8020 | debug info. */ |
| 8021 | } |
| 8022 | } |
| 8023 | |
| 8024 | /* All of the above is setup for this call. Yikes. */ |
| 8025 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); |
| 8026 | |
| 8027 | /* Done, clean up. */ |
| 8028 | if (new_cu != NULL && keep) |
| 8029 | { |
| 8030 | /* Link this CU into read_in_chain. */ |
| 8031 | this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; |
| 8032 | dwarf2_per_objfile->read_in_chain = this_cu; |
| 8033 | /* The chain owns it now. */ |
| 8034 | new_cu.release (); |
| 8035 | } |
| 8036 | } |
| 8037 | |
| 8038 | /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present. |
| 8039 | DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed |
| 8040 | to have already done the lookup to find the DWO file). |
| 8041 | |
| 8042 | The caller is required to fill in THIS_CU->section, THIS_CU->offset, and |
| 8043 | THIS_CU->is_debug_types, but nothing else. |
| 8044 | |
| 8045 | We fill in THIS_CU->length. |
| 8046 | |
| 8047 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental |
| 8048 | linker) then DIE_READER_FUNC will not get called. |
| 8049 | |
| 8050 | THIS_CU->cu is always freed when done. |
| 8051 | This is done in order to not leave THIS_CU->cu in a state where we have |
| 8052 | to care whether it refers to the "main" CU or the DWO CU. */ |
| 8053 | |
| 8054 | static void |
| 8055 | init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data *this_cu, |
| 8056 | struct dwo_file *dwo_file, |
| 8057 | die_reader_func_ftype *die_reader_func, |
| 8058 | void *data) |
| 8059 | { |
| 8060 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_cu->dwarf2_per_objfile; |
| 8061 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 8062 | struct dwarf2_section_info *section = this_cu->section; |
| 8063 | bfd *abfd = get_section_bfd_owner (section); |
| 8064 | struct dwarf2_section_info *abbrev_section; |
| 8065 | const gdb_byte *begin_info_ptr, *info_ptr; |
| 8066 | struct die_reader_specs reader; |
| 8067 | struct die_info *comp_unit_die; |
| 8068 | int has_children; |
| 8069 | |
| 8070 | if (dwarf_die_debug) |
| 8071 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n", |
| 8072 | this_cu->is_debug_types ? "type" : "comp", |
| 8073 | to_underlying (this_cu->sect_off)); |
| 8074 | |
| 8075 | gdb_assert (this_cu->cu == NULL); |
| 8076 | |
| 8077 | abbrev_section = (dwo_file != NULL |
| 8078 | ? &dwo_file->sections.abbrev |
| 8079 | : get_abbrev_section_for_cu (this_cu)); |
| 8080 | |
| 8081 | /* This is cheap if the section is already read in. */ |
| 8082 | dwarf2_read_section (objfile, section); |
| 8083 | |
| 8084 | struct dwarf2_cu cu (this_cu); |
| 8085 | |
| 8086 | begin_info_ptr = info_ptr = section->buffer + to_underlying (this_cu->sect_off); |
| 8087 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
| 8088 | &cu.header, section, |
| 8089 | abbrev_section, info_ptr, |
| 8090 | (this_cu->is_debug_types |
| 8091 | ? rcuh_kind::TYPE |
| 8092 | : rcuh_kind::COMPILE)); |
| 8093 | |
| 8094 | this_cu->length = get_cu_length (&cu.header); |
| 8095 | |
| 8096 | /* Skip dummy compilation units. */ |
| 8097 | if (info_ptr >= begin_info_ptr + this_cu->length |
| 8098 | || peek_abbrev_code (abfd, info_ptr) == 0) |
| 8099 | return; |
| 8100 | |
| 8101 | abbrev_table_up abbrev_table |
| 8102 | = abbrev_table_read_table (dwarf2_per_objfile, abbrev_section, |
| 8103 | cu.header.abbrev_sect_off); |
| 8104 | |
| 8105 | init_cu_die_reader (&reader, &cu, section, dwo_file, abbrev_table.get ()); |
| 8106 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
| 8107 | |
| 8108 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); |
| 8109 | } |
| 8110 | |
| 8111 | /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and |
| 8112 | does not lookup the specified DWO file. |
| 8113 | This cannot be used to read DWO files. |
| 8114 | |
| 8115 | THIS_CU->cu is always freed when done. |
| 8116 | This is done in order to not leave THIS_CU->cu in a state where we have |
| 8117 | to care whether it refers to the "main" CU or the DWO CU. |
| 8118 | We can revisit this if the data shows there's a performance issue. */ |
| 8119 | |
| 8120 | static void |
| 8121 | init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data *this_cu, |
| 8122 | die_reader_func_ftype *die_reader_func, |
| 8123 | void *data) |
| 8124 | { |
| 8125 | init_cutu_and_read_dies_no_follow (this_cu, NULL, die_reader_func, data); |
| 8126 | } |
| 8127 | \f |
| 8128 | /* Type Unit Groups. |
| 8129 | |
| 8130 | Type Unit Groups are a way to collapse the set of all TUs (type units) into |
| 8131 | a more manageable set. The grouping is done by DW_AT_stmt_list entry |
| 8132 | so that all types coming from the same compilation (.o file) are grouped |
| 8133 | together. A future step could be to put the types in the same symtab as |
| 8134 | the CU the types ultimately came from. */ |
| 8135 | |
| 8136 | static hashval_t |
| 8137 | hash_type_unit_group (const void *item) |
| 8138 | { |
| 8139 | const struct type_unit_group *tu_group |
| 8140 | = (const struct type_unit_group *) item; |
| 8141 | |
| 8142 | return hash_stmt_list_entry (&tu_group->hash); |
| 8143 | } |
| 8144 | |
| 8145 | static int |
| 8146 | eq_type_unit_group (const void *item_lhs, const void *item_rhs) |
| 8147 | { |
| 8148 | const struct type_unit_group *lhs = (const struct type_unit_group *) item_lhs; |
| 8149 | const struct type_unit_group *rhs = (const struct type_unit_group *) item_rhs; |
| 8150 | |
| 8151 | return eq_stmt_list_entry (&lhs->hash, &rhs->hash); |
| 8152 | } |
| 8153 | |
| 8154 | /* Allocate a hash table for type unit groups. */ |
| 8155 | |
| 8156 | static htab_t |
| 8157 | allocate_type_unit_groups_table (struct objfile *objfile) |
| 8158 | { |
| 8159 | return htab_create_alloc_ex (3, |
| 8160 | hash_type_unit_group, |
| 8161 | eq_type_unit_group, |
| 8162 | NULL, |
| 8163 | &objfile->objfile_obstack, |
| 8164 | hashtab_obstack_allocate, |
| 8165 | dummy_obstack_deallocate); |
| 8166 | } |
| 8167 | |
| 8168 | /* Type units that don't have DW_AT_stmt_list are grouped into their own |
| 8169 | partial symtabs. We combine several TUs per psymtab to not let the size |
| 8170 | of any one psymtab grow too big. */ |
| 8171 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31) |
| 8172 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10 |
| 8173 | |
| 8174 | /* Helper routine for get_type_unit_group. |
| 8175 | Create the type_unit_group object used to hold one or more TUs. */ |
| 8176 | |
| 8177 | static struct type_unit_group * |
| 8178 | create_type_unit_group (struct dwarf2_cu *cu, sect_offset line_offset_struct) |
| 8179 | { |
| 8180 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 8181 | = cu->per_cu->dwarf2_per_objfile; |
| 8182 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 8183 | struct dwarf2_per_cu_data *per_cu; |
| 8184 | struct type_unit_group *tu_group; |
| 8185 | |
| 8186 | tu_group = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
| 8187 | struct type_unit_group); |
| 8188 | per_cu = &tu_group->per_cu; |
| 8189 | per_cu->dwarf2_per_objfile = dwarf2_per_objfile; |
| 8190 | |
| 8191 | if (dwarf2_per_objfile->using_index) |
| 8192 | { |
| 8193 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
| 8194 | struct dwarf2_per_cu_quick_data); |
| 8195 | } |
| 8196 | else |
| 8197 | { |
| 8198 | unsigned int line_offset = to_underlying (line_offset_struct); |
| 8199 | struct partial_symtab *pst; |
| 8200 | char *name; |
| 8201 | |
| 8202 | /* Give the symtab a useful name for debug purposes. */ |
| 8203 | if ((line_offset & NO_STMT_LIST_TYPE_UNIT_PSYMTAB) != 0) |
| 8204 | name = xstrprintf ("<type_units_%d>", |
| 8205 | (line_offset & ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB)); |
| 8206 | else |
| 8207 | name = xstrprintf ("<type_units_at_0x%x>", line_offset); |
| 8208 | |
| 8209 | pst = create_partial_symtab (per_cu, name); |
| 8210 | pst->anonymous = 1; |
| 8211 | |
| 8212 | xfree (name); |
| 8213 | } |
| 8214 | |
| 8215 | tu_group->hash.dwo_unit = cu->dwo_unit; |
| 8216 | tu_group->hash.line_sect_off = line_offset_struct; |
| 8217 | |
| 8218 | return tu_group; |
| 8219 | } |
| 8220 | |
| 8221 | /* Look up the type_unit_group for type unit CU, and create it if necessary. |
| 8222 | STMT_LIST is a DW_AT_stmt_list attribute. */ |
| 8223 | |
| 8224 | static struct type_unit_group * |
| 8225 | get_type_unit_group (struct dwarf2_cu *cu, const struct attribute *stmt_list) |
| 8226 | { |
| 8227 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 8228 | = cu->per_cu->dwarf2_per_objfile; |
| 8229 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; |
| 8230 | struct type_unit_group *tu_group; |
| 8231 | void **slot; |
| 8232 | unsigned int line_offset; |
| 8233 | struct type_unit_group type_unit_group_for_lookup; |
| 8234 | |
| 8235 | if (dwarf2_per_objfile->type_unit_groups == NULL) |
| 8236 | { |
| 8237 | dwarf2_per_objfile->type_unit_groups = |
| 8238 | allocate_type_unit_groups_table (dwarf2_per_objfile->objfile); |
| 8239 | } |
| 8240 | |
| 8241 | /* Do we need to create a new group, or can we use an existing one? */ |
| 8242 | |
| 8243 | if (stmt_list) |
| 8244 | { |
| 8245 | line_offset = DW_UNSND (stmt_list); |
| 8246 | ++tu_stats->nr_symtab_sharers; |
| 8247 | } |
| 8248 | else |
| 8249 | { |
| 8250 | /* Ugh, no stmt_list. Rare, but we have to handle it. |
| 8251 | We can do various things here like create one group per TU or |
| 8252 | spread them over multiple groups to split up the expansion work. |
| 8253 | To avoid worst case scenarios (too many groups or too large groups) |
| 8254 | we, umm, group them in bunches. */ |
| 8255 | line_offset = (NO_STMT_LIST_TYPE_UNIT_PSYMTAB |
| 8256 | | (tu_stats->nr_stmt_less_type_units |
| 8257 | / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE)); |
| 8258 | ++tu_stats->nr_stmt_less_type_units; |
| 8259 | } |
| 8260 | |
| 8261 | type_unit_group_for_lookup.hash.dwo_unit = cu->dwo_unit; |
| 8262 | type_unit_group_for_lookup.hash.line_sect_off = (sect_offset) line_offset; |
| 8263 | slot = htab_find_slot (dwarf2_per_objfile->type_unit_groups, |
| 8264 | &type_unit_group_for_lookup, INSERT); |
| 8265 | if (*slot != NULL) |
| 8266 | { |
| 8267 | tu_group = (struct type_unit_group *) *slot; |
| 8268 | gdb_assert (tu_group != NULL); |
| 8269 | } |
| 8270 | else |
| 8271 | { |
| 8272 | sect_offset line_offset_struct = (sect_offset) line_offset; |
| 8273 | tu_group = create_type_unit_group (cu, line_offset_struct); |
| 8274 | *slot = tu_group; |
| 8275 | ++tu_stats->nr_symtabs; |
| 8276 | } |
| 8277 | |
| 8278 | return tu_group; |
| 8279 | } |
| 8280 | \f |
| 8281 | /* Partial symbol tables. */ |
| 8282 | |
| 8283 | /* Create a psymtab named NAME and assign it to PER_CU. |
| 8284 | |
| 8285 | The caller must fill in the following details: |
| 8286 | dirname, textlow, texthigh. */ |
| 8287 | |
| 8288 | static struct partial_symtab * |
| 8289 | create_partial_symtab (struct dwarf2_per_cu_data *per_cu, const char *name) |
| 8290 | { |
| 8291 | struct objfile *objfile = per_cu->dwarf2_per_objfile->objfile; |
| 8292 | struct partial_symtab *pst; |
| 8293 | |
| 8294 | pst = start_psymtab_common (objfile, name, 0, |
| 8295 | objfile->global_psymbols, |
| 8296 | objfile->static_psymbols); |
| 8297 | |
| 8298 | pst->psymtabs_addrmap_supported = 1; |
| 8299 | |
| 8300 | /* This is the glue that links PST into GDB's symbol API. */ |
| 8301 | pst->read_symtab_private = per_cu; |
| 8302 | pst->read_symtab = dwarf2_read_symtab; |
| 8303 | per_cu->v.psymtab = pst; |
| 8304 | |
| 8305 | return pst; |
| 8306 | } |
| 8307 | |
| 8308 | /* The DATA object passed to process_psymtab_comp_unit_reader has this |
| 8309 | type. */ |
| 8310 | |
| 8311 | struct process_psymtab_comp_unit_data |
| 8312 | { |
| 8313 | /* True if we are reading a DW_TAG_partial_unit. */ |
| 8314 | |
| 8315 | int want_partial_unit; |
| 8316 | |
| 8317 | /* The "pretend" language that is used if the CU doesn't declare a |
| 8318 | language. */ |
| 8319 | |
| 8320 | enum language pretend_language; |
| 8321 | }; |
| 8322 | |
| 8323 | /* die_reader_func for process_psymtab_comp_unit. */ |
| 8324 | |
| 8325 | static void |
| 8326 | process_psymtab_comp_unit_reader (const struct die_reader_specs *reader, |
| 8327 | const gdb_byte *info_ptr, |
| 8328 | struct die_info *comp_unit_die, |
| 8329 | int has_children, |
| 8330 | void *data) |
| 8331 | { |
| 8332 | struct dwarf2_cu *cu = reader->cu; |
| 8333 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 8334 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
| 8335 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; |
| 8336 | CORE_ADDR baseaddr; |
| 8337 | CORE_ADDR best_lowpc = 0, best_highpc = 0; |
| 8338 | struct partial_symtab *pst; |
| 8339 | enum pc_bounds_kind cu_bounds_kind; |
| 8340 | const char *filename; |
| 8341 | struct process_psymtab_comp_unit_data *info |
| 8342 | = (struct process_psymtab_comp_unit_data *) data; |
| 8343 | |
| 8344 | if (comp_unit_die->tag == DW_TAG_partial_unit && !info->want_partial_unit) |
| 8345 | return; |
| 8346 | |
| 8347 | gdb_assert (! per_cu->is_debug_types); |
| 8348 | |
| 8349 | prepare_one_comp_unit (cu, comp_unit_die, info->pretend_language); |
| 8350 | |
| 8351 | cu->list_in_scope = &file_symbols; |
| 8352 | |
| 8353 | /* Allocate a new partial symbol table structure. */ |
| 8354 | filename = dwarf2_string_attr (comp_unit_die, DW_AT_name, cu); |
| 8355 | if (filename == NULL) |
| 8356 | filename = ""; |
| 8357 | |
| 8358 | pst = create_partial_symtab (per_cu, filename); |
| 8359 | |
| 8360 | /* This must be done before calling dwarf2_build_include_psymtabs. */ |
| 8361 | pst->dirname = dwarf2_string_attr (comp_unit_die, DW_AT_comp_dir, cu); |
| 8362 | |
| 8363 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
| 8364 | |
| 8365 | dwarf2_find_base_address (comp_unit_die, cu); |
| 8366 | |
| 8367 | /* Possibly set the default values of LOWPC and HIGHPC from |
| 8368 | `DW_AT_ranges'. */ |
| 8369 | cu_bounds_kind = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc, |
| 8370 | &best_highpc, cu, pst); |
| 8371 | if (cu_bounds_kind == PC_BOUNDS_HIGH_LOW && best_lowpc < best_highpc) |
| 8372 | /* Store the contiguous range if it is not empty; it can be empty for |
| 8373 | CUs with no code. */ |
| 8374 | addrmap_set_empty (objfile->psymtabs_addrmap, |
| 8375 | gdbarch_adjust_dwarf2_addr (gdbarch, |
| 8376 | best_lowpc + baseaddr), |
| 8377 | gdbarch_adjust_dwarf2_addr (gdbarch, |
| 8378 | best_highpc + baseaddr) - 1, |
| 8379 | pst); |
| 8380 | |
| 8381 | /* Check if comp unit has_children. |
| 8382 | If so, read the rest of the partial symbols from this comp unit. |
| 8383 | If not, there's no more debug_info for this comp unit. */ |
| 8384 | if (has_children) |
| 8385 | { |
| 8386 | struct partial_die_info *first_die; |
| 8387 | CORE_ADDR lowpc, highpc; |
| 8388 | |
| 8389 | lowpc = ((CORE_ADDR) -1); |
| 8390 | highpc = ((CORE_ADDR) 0); |
| 8391 | |
| 8392 | first_die = load_partial_dies (reader, info_ptr, 1); |
| 8393 | |
| 8394 | scan_partial_symbols (first_die, &lowpc, &highpc, |
| 8395 | cu_bounds_kind <= PC_BOUNDS_INVALID, cu); |
| 8396 | |
| 8397 | /* If we didn't find a lowpc, set it to highpc to avoid |
| 8398 | complaints from `maint check'. */ |
| 8399 | if (lowpc == ((CORE_ADDR) -1)) |
| 8400 | lowpc = highpc; |
| 8401 | |
| 8402 | /* If the compilation unit didn't have an explicit address range, |
| 8403 | then use the information extracted from its child dies. */ |
| 8404 | if (cu_bounds_kind <= PC_BOUNDS_INVALID) |
| 8405 | { |
| 8406 | best_lowpc = lowpc; |
| 8407 | best_highpc = highpc; |
| 8408 | } |
| 8409 | } |
| 8410 | pst->textlow = gdbarch_adjust_dwarf2_addr (gdbarch, best_lowpc + baseaddr); |
| 8411 | pst->texthigh = gdbarch_adjust_dwarf2_addr (gdbarch, best_highpc + baseaddr); |
| 8412 | |
| 8413 | end_psymtab_common (objfile, pst); |
| 8414 | |
| 8415 | if (!VEC_empty (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs)) |
| 8416 | { |
| 8417 | int i; |
| 8418 | int len = VEC_length (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs); |
| 8419 | struct dwarf2_per_cu_data *iter; |
| 8420 | |
| 8421 | /* Fill in 'dependencies' here; we fill in 'users' in a |
| 8422 | post-pass. */ |
| 8423 | pst->number_of_dependencies = len; |
| 8424 | pst->dependencies = |
| 8425 | XOBNEWVEC (&objfile->objfile_obstack, struct partial_symtab *, len); |
| 8426 | for (i = 0; |
| 8427 | VEC_iterate (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs, |
| 8428 | i, iter); |
| 8429 | ++i) |
| 8430 | pst->dependencies[i] = iter->v.psymtab; |
| 8431 | |
| 8432 | VEC_free (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs); |
| 8433 | } |
| 8434 | |
| 8435 | /* Get the list of files included in the current compilation unit, |
| 8436 | and build a psymtab for each of them. */ |
| 8437 | dwarf2_build_include_psymtabs (cu, comp_unit_die, pst); |
| 8438 | |
| 8439 | if (dwarf_read_debug) |
| 8440 | { |
| 8441 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
| 8442 | |
| 8443 | fprintf_unfiltered (gdb_stdlog, |
| 8444 | "Psymtab for %s unit @0x%x: %s - %s" |
| 8445 | ", %d global, %d static syms\n", |
| 8446 | per_cu->is_debug_types ? "type" : "comp", |
| 8447 | to_underlying (per_cu->sect_off), |
| 8448 | paddress (gdbarch, pst->textlow), |
| 8449 | paddress (gdbarch, pst->texthigh), |
| 8450 | pst->n_global_syms, pst->n_static_syms); |
| 8451 | } |
| 8452 | } |
| 8453 | |
| 8454 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. |
| 8455 | Process compilation unit THIS_CU for a psymtab. */ |
| 8456 | |
| 8457 | static void |
| 8458 | process_psymtab_comp_unit (struct dwarf2_per_cu_data *this_cu, |
| 8459 | int want_partial_unit, |
| 8460 | enum language pretend_language) |
| 8461 | { |
| 8462 | /* If this compilation unit was already read in, free the |
| 8463 | cached copy in order to read it in again. This is |
| 8464 | necessary because we skipped some symbols when we first |
| 8465 | read in the compilation unit (see load_partial_dies). |
| 8466 | This problem could be avoided, but the benefit is unclear. */ |
| 8467 | if (this_cu->cu != NULL) |
| 8468 | free_one_cached_comp_unit (this_cu); |
| 8469 | |
| 8470 | if (this_cu->is_debug_types) |
| 8471 | init_cutu_and_read_dies (this_cu, NULL, 0, 0, build_type_psymtabs_reader, |
| 8472 | NULL); |
| 8473 | else |
| 8474 | { |
| 8475 | process_psymtab_comp_unit_data info; |
| 8476 | info.want_partial_unit = want_partial_unit; |
| 8477 | info.pretend_language = pretend_language; |
| 8478 | init_cutu_and_read_dies (this_cu, NULL, 0, 0, |
| 8479 | process_psymtab_comp_unit_reader, &info); |
| 8480 | } |
| 8481 | |
| 8482 | /* Age out any secondary CUs. */ |
| 8483 | age_cached_comp_units (this_cu->dwarf2_per_objfile); |
| 8484 | } |
| 8485 | |
| 8486 | /* Reader function for build_type_psymtabs. */ |
| 8487 | |
| 8488 | static void |
| 8489 | build_type_psymtabs_reader (const struct die_reader_specs *reader, |
| 8490 | const gdb_byte *info_ptr, |
| 8491 | struct die_info *type_unit_die, |
| 8492 | int has_children, |
| 8493 | void *data) |
| 8494 | { |
| 8495 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 8496 | = reader->cu->per_cu->dwarf2_per_objfile; |
| 8497 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 8498 | struct dwarf2_cu *cu = reader->cu; |
| 8499 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; |
| 8500 | struct signatured_type *sig_type; |
| 8501 | struct type_unit_group *tu_group; |
| 8502 | struct attribute *attr; |
| 8503 | struct partial_die_info *first_die; |
| 8504 | CORE_ADDR lowpc, highpc; |
| 8505 | struct partial_symtab *pst; |
| 8506 | |
| 8507 | gdb_assert (data == NULL); |
| 8508 | gdb_assert (per_cu->is_debug_types); |
| 8509 | sig_type = (struct signatured_type *) per_cu; |
| 8510 | |
| 8511 | if (! has_children) |
| 8512 | return; |
| 8513 | |
| 8514 | attr = dwarf2_attr_no_follow (type_unit_die, DW_AT_stmt_list); |
| 8515 | tu_group = get_type_unit_group (cu, attr); |
| 8516 | |
| 8517 | VEC_safe_push (sig_type_ptr, tu_group->tus, sig_type); |
| 8518 | |
| 8519 | prepare_one_comp_unit (cu, type_unit_die, language_minimal); |
| 8520 | cu->list_in_scope = &file_symbols; |
| 8521 | pst = create_partial_symtab (per_cu, ""); |
| 8522 | pst->anonymous = 1; |
| 8523 | |
| 8524 | first_die = load_partial_dies (reader, info_ptr, 1); |
| 8525 | |
| 8526 | lowpc = (CORE_ADDR) -1; |
| 8527 | highpc = (CORE_ADDR) 0; |
| 8528 | scan_partial_symbols (first_die, &lowpc, &highpc, 0, cu); |
| 8529 | |
| 8530 | end_psymtab_common (objfile, pst); |
| 8531 | } |
| 8532 | |
| 8533 | /* Struct used to sort TUs by their abbreviation table offset. */ |
| 8534 | |
| 8535 | struct tu_abbrev_offset |
| 8536 | { |
| 8537 | struct signatured_type *sig_type; |
| 8538 | sect_offset abbrev_offset; |
| 8539 | }; |
| 8540 | |
| 8541 | /* Helper routine for build_type_psymtabs_1, passed to qsort. */ |
| 8542 | |
| 8543 | static int |
| 8544 | sort_tu_by_abbrev_offset (const void *ap, const void *bp) |
| 8545 | { |
| 8546 | const struct tu_abbrev_offset * const *a |
| 8547 | = (const struct tu_abbrev_offset * const*) ap; |
| 8548 | const struct tu_abbrev_offset * const *b |
| 8549 | = (const struct tu_abbrev_offset * const*) bp; |
| 8550 | sect_offset aoff = (*a)->abbrev_offset; |
| 8551 | sect_offset boff = (*b)->abbrev_offset; |
| 8552 | |
| 8553 | return (aoff > boff) - (aoff < boff); |
| 8554 | } |
| 8555 | |
| 8556 | /* Efficiently read all the type units. |
| 8557 | This does the bulk of the work for build_type_psymtabs. |
| 8558 | |
| 8559 | The efficiency is because we sort TUs by the abbrev table they use and |
| 8560 | only read each abbrev table once. In one program there are 200K TUs |
| 8561 | sharing 8K abbrev tables. |
| 8562 | |
| 8563 | The main purpose of this function is to support building the |
| 8564 | dwarf2_per_objfile->type_unit_groups table. |
| 8565 | TUs typically share the DW_AT_stmt_list of the CU they came from, so we |
| 8566 | can collapse the search space by grouping them by stmt_list. |
| 8567 | The savings can be significant, in the same program from above the 200K TUs |
| 8568 | share 8K stmt_list tables. |
| 8569 | |
| 8570 | FUNC is expected to call get_type_unit_group, which will create the |
| 8571 | struct type_unit_group if necessary and add it to |
| 8572 | dwarf2_per_objfile->type_unit_groups. */ |
| 8573 | |
| 8574 | static void |
| 8575 | build_type_psymtabs_1 (struct dwarf2_per_objfile *dwarf2_per_objfile) |
| 8576 | { |
| 8577 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; |
| 8578 | struct cleanup *cleanups; |
| 8579 | abbrev_table_up abbrev_table; |
| 8580 | sect_offset abbrev_offset; |
| 8581 | struct tu_abbrev_offset *sorted_by_abbrev; |
| 8582 | int i; |
| 8583 | |
| 8584 | /* It's up to the caller to not call us multiple times. */ |
| 8585 | gdb_assert (dwarf2_per_objfile->type_unit_groups == NULL); |
| 8586 | |
| 8587 | if (dwarf2_per_objfile->n_type_units == 0) |
| 8588 | return; |
| 8589 | |
| 8590 | /* TUs typically share abbrev tables, and there can be way more TUs than |
| 8591 | abbrev tables. Sort by abbrev table to reduce the number of times we |
| 8592 | read each abbrev table in. |
| 8593 | Alternatives are to punt or to maintain a cache of abbrev tables. |
| 8594 | This is simpler and efficient enough for now. |
| 8595 | |
| 8596 | Later we group TUs by their DW_AT_stmt_list value (as this defines the |
| 8597 | symtab to use). Typically TUs with the same abbrev offset have the same |
| 8598 | stmt_list value too so in practice this should work well. |
| 8599 | |
| 8600 | The basic algorithm here is: |
| 8601 | |
| 8602 | sort TUs by abbrev table |
| 8603 | for each TU with same abbrev table: |
| 8604 | read abbrev table if first user |
| 8605 | read TU top level DIE |
| 8606 | [IWBN if DWO skeletons had DW_AT_stmt_list] |
| 8607 | call FUNC */ |
| 8608 | |
| 8609 | if (dwarf_read_debug) |
| 8610 | fprintf_unfiltered (gdb_stdlog, "Building type unit groups ...\n"); |
| 8611 | |
| 8612 | /* Sort in a separate table to maintain the order of all_type_units |
| 8613 | for .gdb_index: TU indices directly index all_type_units. */ |
| 8614 | sorted_by_abbrev = XNEWVEC (struct tu_abbrev_offset, |
| 8615 | dwarf2_per_objfile->n_type_units); |
| 8616 | for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i) |
| 8617 | { |
| 8618 | struct signatured_type *sig_type = dwarf2_per_objfile->all_type_units[i]; |
| 8619 | |
| 8620 | sorted_by_abbrev[i].sig_type = sig_type; |
| 8621 | sorted_by_abbrev[i].abbrev_offset = |
| 8622 | read_abbrev_offset (dwarf2_per_objfile, |
| 8623 | sig_type->per_cu.section, |
| 8624 | sig_type->per_cu.sect_off); |
| 8625 | } |
| 8626 | cleanups = make_cleanup (xfree, sorted_by_abbrev); |
| 8627 | qsort (sorted_by_abbrev, dwarf2_per_objfile->n_type_units, |
| 8628 | sizeof (struct tu_abbrev_offset), sort_tu_by_abbrev_offset); |
| 8629 | |
| 8630 | abbrev_offset = (sect_offset) ~(unsigned) 0; |
| 8631 | |
| 8632 | for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i) |
| 8633 | { |
| 8634 | const struct tu_abbrev_offset *tu = &sorted_by_abbrev[i]; |
| 8635 | |
| 8636 | /* Switch to the next abbrev table if necessary. */ |
| 8637 | if (abbrev_table == NULL |
| 8638 | || tu->abbrev_offset != abbrev_offset) |
| 8639 | { |
| 8640 | abbrev_offset = tu->abbrev_offset; |
| 8641 | abbrev_table = |
| 8642 | abbrev_table_read_table (dwarf2_per_objfile, |
| 8643 | &dwarf2_per_objfile->abbrev, |
| 8644 | abbrev_offset); |
| 8645 | ++tu_stats->nr_uniq_abbrev_tables; |
| 8646 | } |
| 8647 | |
| 8648 | init_cutu_and_read_dies (&tu->sig_type->per_cu, abbrev_table.get (), |
| 8649 | 0, 0, build_type_psymtabs_reader, NULL); |
| 8650 | } |
| 8651 | |
| 8652 | do_cleanups (cleanups); |
| 8653 | } |
| 8654 | |
| 8655 | /* Print collected type unit statistics. */ |
| 8656 | |
| 8657 | static void |
| 8658 | print_tu_stats (struct dwarf2_per_objfile *dwarf2_per_objfile) |
| 8659 | { |
| 8660 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; |
| 8661 | |
| 8662 | fprintf_unfiltered (gdb_stdlog, "Type unit statistics:\n"); |
| 8663 | fprintf_unfiltered (gdb_stdlog, " %d TUs\n", |
| 8664 | dwarf2_per_objfile->n_type_units); |
| 8665 | fprintf_unfiltered (gdb_stdlog, " %d uniq abbrev tables\n", |
| 8666 | tu_stats->nr_uniq_abbrev_tables); |
| 8667 | fprintf_unfiltered (gdb_stdlog, " %d symtabs from stmt_list entries\n", |
| 8668 | tu_stats->nr_symtabs); |
| 8669 | fprintf_unfiltered (gdb_stdlog, " %d symtab sharers\n", |
| 8670 | tu_stats->nr_symtab_sharers); |
| 8671 | fprintf_unfiltered (gdb_stdlog, " %d type units without a stmt_list\n", |
| 8672 | tu_stats->nr_stmt_less_type_units); |
| 8673 | fprintf_unfiltered (gdb_stdlog, " %d all_type_units reallocs\n", |
| 8674 | tu_stats->nr_all_type_units_reallocs); |
| 8675 | } |
| 8676 | |
| 8677 | /* Traversal function for build_type_psymtabs. */ |
| 8678 | |
| 8679 | static int |
| 8680 | build_type_psymtab_dependencies (void **slot, void *info) |
| 8681 | { |
| 8682 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 8683 | = (struct dwarf2_per_objfile *) info; |
| 8684 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 8685 | struct type_unit_group *tu_group = (struct type_unit_group *) *slot; |
| 8686 | struct dwarf2_per_cu_data *per_cu = &tu_group->per_cu; |
| 8687 | struct partial_symtab *pst = per_cu->v.psymtab; |
| 8688 | int len = VEC_length (sig_type_ptr, tu_group->tus); |
| 8689 | struct signatured_type *iter; |
| 8690 | int i; |
| 8691 | |
| 8692 | gdb_assert (len > 0); |
| 8693 | gdb_assert (IS_TYPE_UNIT_GROUP (per_cu)); |
| 8694 | |
| 8695 | pst->number_of_dependencies = len; |
| 8696 | pst->dependencies = |
| 8697 | XOBNEWVEC (&objfile->objfile_obstack, struct partial_symtab *, len); |
| 8698 | for (i = 0; |
| 8699 | VEC_iterate (sig_type_ptr, tu_group->tus, i, iter); |
| 8700 | ++i) |
| 8701 | { |
| 8702 | gdb_assert (iter->per_cu.is_debug_types); |
| 8703 | pst->dependencies[i] = iter->per_cu.v.psymtab; |
| 8704 | iter->type_unit_group = tu_group; |
| 8705 | } |
| 8706 | |
| 8707 | VEC_free (sig_type_ptr, tu_group->tus); |
| 8708 | |
| 8709 | return 1; |
| 8710 | } |
| 8711 | |
| 8712 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. |
| 8713 | Build partial symbol tables for the .debug_types comp-units. */ |
| 8714 | |
| 8715 | static void |
| 8716 | build_type_psymtabs (struct dwarf2_per_objfile *dwarf2_per_objfile) |
| 8717 | { |
| 8718 | if (! create_all_type_units (dwarf2_per_objfile)) |
| 8719 | return; |
| 8720 | |
| 8721 | build_type_psymtabs_1 (dwarf2_per_objfile); |
| 8722 | } |
| 8723 | |
| 8724 | /* Traversal function for process_skeletonless_type_unit. |
| 8725 | Read a TU in a DWO file and build partial symbols for it. */ |
| 8726 | |
| 8727 | static int |
| 8728 | process_skeletonless_type_unit (void **slot, void *info) |
| 8729 | { |
| 8730 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; |
| 8731 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 8732 | = (struct dwarf2_per_objfile *) info; |
| 8733 | struct signatured_type find_entry, *entry; |
| 8734 | |
| 8735 | /* If this TU doesn't exist in the global table, add it and read it in. */ |
| 8736 | |
| 8737 | if (dwarf2_per_objfile->signatured_types == NULL) |
| 8738 | { |
| 8739 | dwarf2_per_objfile->signatured_types |
| 8740 | = allocate_signatured_type_table (dwarf2_per_objfile->objfile); |
| 8741 | } |
| 8742 | |
| 8743 | find_entry.signature = dwo_unit->signature; |
| 8744 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, &find_entry, |
| 8745 | INSERT); |
| 8746 | /* If we've already seen this type there's nothing to do. What's happening |
| 8747 | is we're doing our own version of comdat-folding here. */ |
| 8748 | if (*slot != NULL) |
| 8749 | return 1; |
| 8750 | |
| 8751 | /* This does the job that create_all_type_units would have done for |
| 8752 | this TU. */ |
| 8753 | entry = add_type_unit (dwarf2_per_objfile, dwo_unit->signature, slot); |
| 8754 | fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile, entry, dwo_unit); |
| 8755 | *slot = entry; |
| 8756 | |
| 8757 | /* This does the job that build_type_psymtabs_1 would have done. */ |
| 8758 | init_cutu_and_read_dies (&entry->per_cu, NULL, 0, 0, |
| 8759 | build_type_psymtabs_reader, NULL); |
| 8760 | |
| 8761 | return 1; |
| 8762 | } |
| 8763 | |
| 8764 | /* Traversal function for process_skeletonless_type_units. */ |
| 8765 | |
| 8766 | static int |
| 8767 | process_dwo_file_for_skeletonless_type_units (void **slot, void *info) |
| 8768 | { |
| 8769 | struct dwo_file *dwo_file = (struct dwo_file *) *slot; |
| 8770 | |
| 8771 | if (dwo_file->tus != NULL) |
| 8772 | { |
| 8773 | htab_traverse_noresize (dwo_file->tus, |
| 8774 | process_skeletonless_type_unit, info); |
| 8775 | } |
| 8776 | |
| 8777 | return 1; |
| 8778 | } |
| 8779 | |
| 8780 | /* Scan all TUs of DWO files, verifying we've processed them. |
| 8781 | This is needed in case a TU was emitted without its skeleton. |
| 8782 | Note: This can't be done until we know what all the DWO files are. */ |
| 8783 | |
| 8784 | static void |
| 8785 | process_skeletonless_type_units (struct dwarf2_per_objfile *dwarf2_per_objfile) |
| 8786 | { |
| 8787 | /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */ |
| 8788 | if (get_dwp_file (dwarf2_per_objfile) == NULL |
| 8789 | && dwarf2_per_objfile->dwo_files != NULL) |
| 8790 | { |
| 8791 | htab_traverse_noresize (dwarf2_per_objfile->dwo_files, |
| 8792 | process_dwo_file_for_skeletonless_type_units, |
| 8793 | dwarf2_per_objfile); |
| 8794 | } |
| 8795 | } |
| 8796 | |
| 8797 | /* Compute the 'user' field for each psymtab in DWARF2_PER_OBJFILE. */ |
| 8798 | |
| 8799 | static void |
| 8800 | set_partial_user (struct dwarf2_per_objfile *dwarf2_per_objfile) |
| 8801 | { |
| 8802 | int i; |
| 8803 | |
| 8804 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
| 8805 | { |
| 8806 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (dwarf2_per_objfile, i); |
| 8807 | struct partial_symtab *pst = per_cu->v.psymtab; |
| 8808 | int j; |
| 8809 | |
| 8810 | if (pst == NULL) |
| 8811 | continue; |
| 8812 | |
| 8813 | for (j = 0; j < pst->number_of_dependencies; ++j) |
| 8814 | { |
| 8815 | /* Set the 'user' field only if it is not already set. */ |
| 8816 | if (pst->dependencies[j]->user == NULL) |
| 8817 | pst->dependencies[j]->user = pst; |
| 8818 | } |
| 8819 | } |
| 8820 | } |
| 8821 | |
| 8822 | /* Build the partial symbol table by doing a quick pass through the |
| 8823 | .debug_info and .debug_abbrev sections. */ |
| 8824 | |
| 8825 | static void |
| 8826 | dwarf2_build_psymtabs_hard (struct dwarf2_per_objfile *dwarf2_per_objfile) |
| 8827 | { |
| 8828 | struct cleanup *back_to; |
| 8829 | int i; |
| 8830 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 8831 | |
| 8832 | if (dwarf_read_debug) |
| 8833 | { |
| 8834 | fprintf_unfiltered (gdb_stdlog, "Building psymtabs of objfile %s ...\n", |
| 8835 | objfile_name (objfile)); |
| 8836 | } |
| 8837 | |
| 8838 | dwarf2_per_objfile->reading_partial_symbols = 1; |
| 8839 | |
| 8840 | dwarf2_read_section (objfile, &dwarf2_per_objfile->info); |
| 8841 | |
| 8842 | /* Any cached compilation units will be linked by the per-objfile |
| 8843 | read_in_chain. Make sure to free them when we're done. */ |
| 8844 | back_to = make_cleanup (free_cached_comp_units, dwarf2_per_objfile); |
| 8845 | |
| 8846 | build_type_psymtabs (dwarf2_per_objfile); |
| 8847 | |
| 8848 | create_all_comp_units (dwarf2_per_objfile); |
| 8849 | |
| 8850 | /* Create a temporary address map on a temporary obstack. We later |
| 8851 | copy this to the final obstack. */ |
| 8852 | auto_obstack temp_obstack; |
| 8853 | |
| 8854 | scoped_restore save_psymtabs_addrmap |
| 8855 | = make_scoped_restore (&objfile->psymtabs_addrmap, |
| 8856 | addrmap_create_mutable (&temp_obstack)); |
| 8857 | |
| 8858 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
| 8859 | { |
| 8860 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (dwarf2_per_objfile, i); |
| 8861 | |
| 8862 | process_psymtab_comp_unit (per_cu, 0, language_minimal); |
| 8863 | } |
| 8864 | |
| 8865 | /* This has to wait until we read the CUs, we need the list of DWOs. */ |
| 8866 | process_skeletonless_type_units (dwarf2_per_objfile); |
| 8867 | |
| 8868 | /* Now that all TUs have been processed we can fill in the dependencies. */ |
| 8869 | if (dwarf2_per_objfile->type_unit_groups != NULL) |
| 8870 | { |
| 8871 | htab_traverse_noresize (dwarf2_per_objfile->type_unit_groups, |
| 8872 | build_type_psymtab_dependencies, dwarf2_per_objfile); |
| 8873 | } |
| 8874 | |
| 8875 | if (dwarf_read_debug) |
| 8876 | print_tu_stats (dwarf2_per_objfile); |
| 8877 | |
| 8878 | set_partial_user (dwarf2_per_objfile); |
| 8879 | |
| 8880 | objfile->psymtabs_addrmap = addrmap_create_fixed (objfile->psymtabs_addrmap, |
| 8881 | &objfile->objfile_obstack); |
| 8882 | /* At this point we want to keep the address map. */ |
| 8883 | save_psymtabs_addrmap.release (); |
| 8884 | |
| 8885 | do_cleanups (back_to); |
| 8886 | |
| 8887 | if (dwarf_read_debug) |
| 8888 | fprintf_unfiltered (gdb_stdlog, "Done building psymtabs of %s\n", |
| 8889 | objfile_name (objfile)); |
| 8890 | } |
| 8891 | |
| 8892 | /* die_reader_func for load_partial_comp_unit. */ |
| 8893 | |
| 8894 | static void |
| 8895 | load_partial_comp_unit_reader (const struct die_reader_specs *reader, |
| 8896 | const gdb_byte *info_ptr, |
| 8897 | struct die_info *comp_unit_die, |
| 8898 | int has_children, |
| 8899 | void *data) |
| 8900 | { |
| 8901 | struct dwarf2_cu *cu = reader->cu; |
| 8902 | |
| 8903 | prepare_one_comp_unit (cu, comp_unit_die, language_minimal); |
| 8904 | |
| 8905 | /* Check if comp unit has_children. |
| 8906 | If so, read the rest of the partial symbols from this comp unit. |
| 8907 | If not, there's no more debug_info for this comp unit. */ |
| 8908 | if (has_children) |
| 8909 | load_partial_dies (reader, info_ptr, 0); |
| 8910 | } |
| 8911 | |
| 8912 | /* Load the partial DIEs for a secondary CU into memory. |
| 8913 | This is also used when rereading a primary CU with load_all_dies. */ |
| 8914 | |
| 8915 | static void |
| 8916 | load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu) |
| 8917 | { |
| 8918 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, |
| 8919 | load_partial_comp_unit_reader, NULL); |
| 8920 | } |
| 8921 | |
| 8922 | static void |
| 8923 | read_comp_units_from_section (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 8924 | struct dwarf2_section_info *section, |
| 8925 | struct dwarf2_section_info *abbrev_section, |
| 8926 | unsigned int is_dwz, |
| 8927 | int *n_allocated, |
| 8928 | int *n_comp_units, |
| 8929 | struct dwarf2_per_cu_data ***all_comp_units) |
| 8930 | { |
| 8931 | const gdb_byte *info_ptr; |
| 8932 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 8933 | |
| 8934 | if (dwarf_read_debug) |
| 8935 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s\n", |
| 8936 | get_section_name (section), |
| 8937 | get_section_file_name (section)); |
| 8938 | |
| 8939 | dwarf2_read_section (objfile, section); |
| 8940 | |
| 8941 | info_ptr = section->buffer; |
| 8942 | |
| 8943 | while (info_ptr < section->buffer + section->size) |
| 8944 | { |
| 8945 | struct dwarf2_per_cu_data *this_cu; |
| 8946 | |
| 8947 | sect_offset sect_off = (sect_offset) (info_ptr - section->buffer); |
| 8948 | |
| 8949 | comp_unit_head cu_header; |
| 8950 | read_and_check_comp_unit_head (dwarf2_per_objfile, &cu_header, section, |
| 8951 | abbrev_section, info_ptr, |
| 8952 | rcuh_kind::COMPILE); |
| 8953 | |
| 8954 | /* Save the compilation unit for later lookup. */ |
| 8955 | if (cu_header.unit_type != DW_UT_type) |
| 8956 | { |
| 8957 | this_cu = XOBNEW (&objfile->objfile_obstack, |
| 8958 | struct dwarf2_per_cu_data); |
| 8959 | memset (this_cu, 0, sizeof (*this_cu)); |
| 8960 | } |
| 8961 | else |
| 8962 | { |
| 8963 | auto sig_type = XOBNEW (&objfile->objfile_obstack, |
| 8964 | struct signatured_type); |
| 8965 | memset (sig_type, 0, sizeof (*sig_type)); |
| 8966 | sig_type->signature = cu_header.signature; |
| 8967 | sig_type->type_offset_in_tu = cu_header.type_cu_offset_in_tu; |
| 8968 | this_cu = &sig_type->per_cu; |
| 8969 | } |
| 8970 | this_cu->is_debug_types = (cu_header.unit_type == DW_UT_type); |
| 8971 | this_cu->sect_off = sect_off; |
| 8972 | this_cu->length = cu_header.length + cu_header.initial_length_size; |
| 8973 | this_cu->is_dwz = is_dwz; |
| 8974 | this_cu->dwarf2_per_objfile = dwarf2_per_objfile; |
| 8975 | this_cu->section = section; |
| 8976 | |
| 8977 | if (*n_comp_units == *n_allocated) |
| 8978 | { |
| 8979 | *n_allocated *= 2; |
| 8980 | *all_comp_units = XRESIZEVEC (struct dwarf2_per_cu_data *, |
| 8981 | *all_comp_units, *n_allocated); |
| 8982 | } |
| 8983 | (*all_comp_units)[*n_comp_units] = this_cu; |
| 8984 | ++*n_comp_units; |
| 8985 | |
| 8986 | info_ptr = info_ptr + this_cu->length; |
| 8987 | } |
| 8988 | } |
| 8989 | |
| 8990 | /* Create a list of all compilation units in OBJFILE. |
| 8991 | This is only done for -readnow and building partial symtabs. */ |
| 8992 | |
| 8993 | static void |
| 8994 | create_all_comp_units (struct dwarf2_per_objfile *dwarf2_per_objfile) |
| 8995 | { |
| 8996 | int n_allocated; |
| 8997 | int n_comp_units; |
| 8998 | struct dwarf2_per_cu_data **all_comp_units; |
| 8999 | struct dwz_file *dwz; |
| 9000 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 9001 | |
| 9002 | n_comp_units = 0; |
| 9003 | n_allocated = 10; |
| 9004 | all_comp_units = XNEWVEC (struct dwarf2_per_cu_data *, n_allocated); |
| 9005 | |
| 9006 | read_comp_units_from_section (dwarf2_per_objfile, &dwarf2_per_objfile->info, |
| 9007 | &dwarf2_per_objfile->abbrev, 0, |
| 9008 | &n_allocated, &n_comp_units, &all_comp_units); |
| 9009 | |
| 9010 | dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
| 9011 | if (dwz != NULL) |
| 9012 | read_comp_units_from_section (dwarf2_per_objfile, &dwz->info, &dwz->abbrev, |
| 9013 | 1, &n_allocated, &n_comp_units, |
| 9014 | &all_comp_units); |
| 9015 | |
| 9016 | dwarf2_per_objfile->all_comp_units = XOBNEWVEC (&objfile->objfile_obstack, |
| 9017 | struct dwarf2_per_cu_data *, |
| 9018 | n_comp_units); |
| 9019 | memcpy (dwarf2_per_objfile->all_comp_units, all_comp_units, |
| 9020 | n_comp_units * sizeof (struct dwarf2_per_cu_data *)); |
| 9021 | xfree (all_comp_units); |
| 9022 | dwarf2_per_objfile->n_comp_units = n_comp_units; |
| 9023 | } |
| 9024 | |
| 9025 | /* Process all loaded DIEs for compilation unit CU, starting at |
| 9026 | FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation |
| 9027 | unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or |
| 9028 | DW_AT_ranges). See the comments of add_partial_subprogram on how |
| 9029 | SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */ |
| 9030 | |
| 9031 | static void |
| 9032 | scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc, |
| 9033 | CORE_ADDR *highpc, int set_addrmap, |
| 9034 | struct dwarf2_cu *cu) |
| 9035 | { |
| 9036 | struct partial_die_info *pdi; |
| 9037 | |
| 9038 | /* Now, march along the PDI's, descending into ones which have |
| 9039 | interesting children but skipping the children of the other ones, |
| 9040 | until we reach the end of the compilation unit. */ |
| 9041 | |
| 9042 | pdi = first_die; |
| 9043 | |
| 9044 | while (pdi != NULL) |
| 9045 | { |
| 9046 | fixup_partial_die (pdi, cu); |
| 9047 | |
| 9048 | /* Anonymous namespaces or modules have no name but have interesting |
| 9049 | children, so we need to look at them. Ditto for anonymous |
| 9050 | enums. */ |
| 9051 | |
| 9052 | if (pdi->name != NULL || pdi->tag == DW_TAG_namespace |
| 9053 | || pdi->tag == DW_TAG_module || pdi->tag == DW_TAG_enumeration_type |
| 9054 | || pdi->tag == DW_TAG_imported_unit |
| 9055 | || pdi->tag == DW_TAG_inlined_subroutine) |
| 9056 | { |
| 9057 | switch (pdi->tag) |
| 9058 | { |
| 9059 | case DW_TAG_subprogram: |
| 9060 | case DW_TAG_inlined_subroutine: |
| 9061 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
| 9062 | break; |
| 9063 | case DW_TAG_constant: |
| 9064 | case DW_TAG_variable: |
| 9065 | case DW_TAG_typedef: |
| 9066 | case DW_TAG_union_type: |
| 9067 | if (!pdi->is_declaration) |
| 9068 | { |
| 9069 | add_partial_symbol (pdi, cu); |
| 9070 | } |
| 9071 | break; |
| 9072 | case DW_TAG_class_type: |
| 9073 | case DW_TAG_interface_type: |
| 9074 | case DW_TAG_structure_type: |
| 9075 | if (!pdi->is_declaration) |
| 9076 | { |
| 9077 | add_partial_symbol (pdi, cu); |
| 9078 | } |
| 9079 | if (cu->language == language_rust && pdi->has_children) |
| 9080 | scan_partial_symbols (pdi->die_child, lowpc, highpc, |
| 9081 | set_addrmap, cu); |
| 9082 | break; |
| 9083 | case DW_TAG_enumeration_type: |
| 9084 | if (!pdi->is_declaration) |
| 9085 | add_partial_enumeration (pdi, cu); |
| 9086 | break; |
| 9087 | case DW_TAG_base_type: |
| 9088 | case DW_TAG_subrange_type: |
| 9089 | /* File scope base type definitions are added to the partial |
| 9090 | symbol table. */ |
| 9091 | add_partial_symbol (pdi, cu); |
| 9092 | break; |
| 9093 | case DW_TAG_namespace: |
| 9094 | add_partial_namespace (pdi, lowpc, highpc, set_addrmap, cu); |
| 9095 | break; |
| 9096 | case DW_TAG_module: |
| 9097 | add_partial_module (pdi, lowpc, highpc, set_addrmap, cu); |
| 9098 | break; |
| 9099 | case DW_TAG_imported_unit: |
| 9100 | { |
| 9101 | struct dwarf2_per_cu_data *per_cu; |
| 9102 | |
| 9103 | /* For now we don't handle imported units in type units. */ |
| 9104 | if (cu->per_cu->is_debug_types) |
| 9105 | { |
| 9106 | error (_("Dwarf Error: DW_TAG_imported_unit is not" |
| 9107 | " supported in type units [in module %s]"), |
| 9108 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
| 9109 | } |
| 9110 | |
| 9111 | per_cu = dwarf2_find_containing_comp_unit |
| 9112 | (pdi->d.sect_off, pdi->is_dwz, |
| 9113 | cu->per_cu->dwarf2_per_objfile); |
| 9114 | |
| 9115 | /* Go read the partial unit, if needed. */ |
| 9116 | if (per_cu->v.psymtab == NULL) |
| 9117 | process_psymtab_comp_unit (per_cu, 1, cu->language); |
| 9118 | |
| 9119 | VEC_safe_push (dwarf2_per_cu_ptr, |
| 9120 | cu->per_cu->imported_symtabs, per_cu); |
| 9121 | } |
| 9122 | break; |
| 9123 | case DW_TAG_imported_declaration: |
| 9124 | add_partial_symbol (pdi, cu); |
| 9125 | break; |
| 9126 | default: |
| 9127 | break; |
| 9128 | } |
| 9129 | } |
| 9130 | |
| 9131 | /* If the die has a sibling, skip to the sibling. */ |
| 9132 | |
| 9133 | pdi = pdi->die_sibling; |
| 9134 | } |
| 9135 | } |
| 9136 | |
| 9137 | /* Functions used to compute the fully scoped name of a partial DIE. |
| 9138 | |
| 9139 | Normally, this is simple. For C++, the parent DIE's fully scoped |
| 9140 | name is concatenated with "::" and the partial DIE's name. |
| 9141 | Enumerators are an exception; they use the scope of their parent |
| 9142 | enumeration type, i.e. the name of the enumeration type is not |
| 9143 | prepended to the enumerator. |
| 9144 | |
| 9145 | There are two complexities. One is DW_AT_specification; in this |
| 9146 | case "parent" means the parent of the target of the specification, |
| 9147 | instead of the direct parent of the DIE. The other is compilers |
| 9148 | which do not emit DW_TAG_namespace; in this case we try to guess |
| 9149 | the fully qualified name of structure types from their members' |
| 9150 | linkage names. This must be done using the DIE's children rather |
| 9151 | than the children of any DW_AT_specification target. We only need |
| 9152 | to do this for structures at the top level, i.e. if the target of |
| 9153 | any DW_AT_specification (if any; otherwise the DIE itself) does not |
| 9154 | have a parent. */ |
| 9155 | |
| 9156 | /* Compute the scope prefix associated with PDI's parent, in |
| 9157 | compilation unit CU. The result will be allocated on CU's |
| 9158 | comp_unit_obstack, or a copy of the already allocated PDI->NAME |
| 9159 | field. NULL is returned if no prefix is necessary. */ |
| 9160 | static const char * |
| 9161 | partial_die_parent_scope (struct partial_die_info *pdi, |
| 9162 | struct dwarf2_cu *cu) |
| 9163 | { |
| 9164 | const char *grandparent_scope; |
| 9165 | struct partial_die_info *parent, *real_pdi; |
| 9166 | |
| 9167 | /* We need to look at our parent DIE; if we have a DW_AT_specification, |
| 9168 | then this means the parent of the specification DIE. */ |
| 9169 | |
| 9170 | real_pdi = pdi; |
| 9171 | while (real_pdi->has_specification) |
| 9172 | real_pdi = find_partial_die (real_pdi->spec_offset, |
| 9173 | real_pdi->spec_is_dwz, cu); |
| 9174 | |
| 9175 | parent = real_pdi->die_parent; |
| 9176 | if (parent == NULL) |
| 9177 | return NULL; |
| 9178 | |
| 9179 | if (parent->scope_set) |
| 9180 | return parent->scope; |
| 9181 | |
| 9182 | fixup_partial_die (parent, cu); |
| 9183 | |
| 9184 | grandparent_scope = partial_die_parent_scope (parent, cu); |
| 9185 | |
| 9186 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
| 9187 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. |
| 9188 | Work around this problem here. */ |
| 9189 | if (cu->language == language_cplus |
| 9190 | && parent->tag == DW_TAG_namespace |
| 9191 | && strcmp (parent->name, "::") == 0 |
| 9192 | && grandparent_scope == NULL) |
| 9193 | { |
| 9194 | parent->scope = NULL; |
| 9195 | parent->scope_set = 1; |
| 9196 | return NULL; |
| 9197 | } |
| 9198 | |
| 9199 | if (pdi->tag == DW_TAG_enumerator) |
| 9200 | /* Enumerators should not get the name of the enumeration as a prefix. */ |
| 9201 | parent->scope = grandparent_scope; |
| 9202 | else if (parent->tag == DW_TAG_namespace |
| 9203 | || parent->tag == DW_TAG_module |
| 9204 | || parent->tag == DW_TAG_structure_type |
| 9205 | || parent->tag == DW_TAG_class_type |
| 9206 | || parent->tag == DW_TAG_interface_type |
| 9207 | || parent->tag == DW_TAG_union_type |
| 9208 | || parent->tag == DW_TAG_enumeration_type) |
| 9209 | { |
| 9210 | if (grandparent_scope == NULL) |
| 9211 | parent->scope = parent->name; |
| 9212 | else |
| 9213 | parent->scope = typename_concat (&cu->comp_unit_obstack, |
| 9214 | grandparent_scope, |
| 9215 | parent->name, 0, cu); |
| 9216 | } |
| 9217 | else |
| 9218 | { |
| 9219 | /* FIXME drow/2004-04-01: What should we be doing with |
| 9220 | function-local names? For partial symbols, we should probably be |
| 9221 | ignoring them. */ |
| 9222 | complaint (&symfile_complaints, |
| 9223 | _("unhandled containing DIE tag %d for DIE at %d"), |
| 9224 | parent->tag, to_underlying (pdi->sect_off)); |
| 9225 | parent->scope = grandparent_scope; |
| 9226 | } |
| 9227 | |
| 9228 | parent->scope_set = 1; |
| 9229 | return parent->scope; |
| 9230 | } |
| 9231 | |
| 9232 | /* Return the fully scoped name associated with PDI, from compilation unit |
| 9233 | CU. The result will be allocated with malloc. */ |
| 9234 | |
| 9235 | static char * |
| 9236 | partial_die_full_name (struct partial_die_info *pdi, |
| 9237 | struct dwarf2_cu *cu) |
| 9238 | { |
| 9239 | const char *parent_scope; |
| 9240 | |
| 9241 | /* If this is a template instantiation, we can not work out the |
| 9242 | template arguments from partial DIEs. So, unfortunately, we have |
| 9243 | to go through the full DIEs. At least any work we do building |
| 9244 | types here will be reused if full symbols are loaded later. */ |
| 9245 | if (pdi->has_template_arguments) |
| 9246 | { |
| 9247 | fixup_partial_die (pdi, cu); |
| 9248 | |
| 9249 | if (pdi->name != NULL && strchr (pdi->name, '<') == NULL) |
| 9250 | { |
| 9251 | struct die_info *die; |
| 9252 | struct attribute attr; |
| 9253 | struct dwarf2_cu *ref_cu = cu; |
| 9254 | |
| 9255 | /* DW_FORM_ref_addr is using section offset. */ |
| 9256 | attr.name = (enum dwarf_attribute) 0; |
| 9257 | attr.form = DW_FORM_ref_addr; |
| 9258 | attr.u.unsnd = to_underlying (pdi->sect_off); |
| 9259 | die = follow_die_ref (NULL, &attr, &ref_cu); |
| 9260 | |
| 9261 | return xstrdup (dwarf2_full_name (NULL, die, ref_cu)); |
| 9262 | } |
| 9263 | } |
| 9264 | |
| 9265 | parent_scope = partial_die_parent_scope (pdi, cu); |
| 9266 | if (parent_scope == NULL) |
| 9267 | return NULL; |
| 9268 | else |
| 9269 | return typename_concat (NULL, parent_scope, pdi->name, 0, cu); |
| 9270 | } |
| 9271 | |
| 9272 | static void |
| 9273 | add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu) |
| 9274 | { |
| 9275 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 9276 | = cu->per_cu->dwarf2_per_objfile; |
| 9277 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 9278 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
| 9279 | CORE_ADDR addr = 0; |
| 9280 | const char *actual_name = NULL; |
| 9281 | CORE_ADDR baseaddr; |
| 9282 | char *built_actual_name; |
| 9283 | |
| 9284 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
| 9285 | |
| 9286 | built_actual_name = partial_die_full_name (pdi, cu); |
| 9287 | if (built_actual_name != NULL) |
| 9288 | actual_name = built_actual_name; |
| 9289 | |
| 9290 | if (actual_name == NULL) |
| 9291 | actual_name = pdi->name; |
| 9292 | |
| 9293 | switch (pdi->tag) |
| 9294 | { |
| 9295 | case DW_TAG_inlined_subroutine: |
| 9296 | case DW_TAG_subprogram: |
| 9297 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, pdi->lowpc + baseaddr); |
| 9298 | if (pdi->is_external || cu->language == language_ada) |
| 9299 | { |
| 9300 | /* brobecker/2007-12-26: Normally, only "external" DIEs are part |
| 9301 | of the global scope. But in Ada, we want to be able to access |
| 9302 | nested procedures globally. So all Ada subprograms are stored |
| 9303 | in the global scope. */ |
| 9304 | add_psymbol_to_list (actual_name, strlen (actual_name), |
| 9305 | built_actual_name != NULL, |
| 9306 | VAR_DOMAIN, LOC_BLOCK, |
| 9307 | &objfile->global_psymbols, |
| 9308 | addr, cu->language, objfile); |
| 9309 | } |
| 9310 | else |
| 9311 | { |
| 9312 | add_psymbol_to_list (actual_name, strlen (actual_name), |
| 9313 | built_actual_name != NULL, |
| 9314 | VAR_DOMAIN, LOC_BLOCK, |
| 9315 | &objfile->static_psymbols, |
| 9316 | addr, cu->language, objfile); |
| 9317 | } |
| 9318 | |
| 9319 | if (pdi->main_subprogram && actual_name != NULL) |
| 9320 | set_objfile_main_name (objfile, actual_name, cu->language); |
| 9321 | break; |
| 9322 | case DW_TAG_constant: |
| 9323 | { |
| 9324 | std::vector<partial_symbol *> *list; |
| 9325 | |
| 9326 | if (pdi->is_external) |
| 9327 | list = &objfile->global_psymbols; |
| 9328 | else |
| 9329 | list = &objfile->static_psymbols; |
| 9330 | add_psymbol_to_list (actual_name, strlen (actual_name), |
| 9331 | built_actual_name != NULL, VAR_DOMAIN, LOC_STATIC, |
| 9332 | list, 0, cu->language, objfile); |
| 9333 | } |
| 9334 | break; |
| 9335 | case DW_TAG_variable: |
| 9336 | if (pdi->d.locdesc) |
| 9337 | addr = decode_locdesc (pdi->d.locdesc, cu); |
| 9338 | |
| 9339 | if (pdi->d.locdesc |
| 9340 | && addr == 0 |
| 9341 | && !dwarf2_per_objfile->has_section_at_zero) |
| 9342 | { |
| 9343 | /* A global or static variable may also have been stripped |
| 9344 | out by the linker if unused, in which case its address |
| 9345 | will be nullified; do not add such variables into partial |
| 9346 | symbol table then. */ |
| 9347 | } |
| 9348 | else if (pdi->is_external) |
| 9349 | { |
| 9350 | /* Global Variable. |
| 9351 | Don't enter into the minimal symbol tables as there is |
| 9352 | a minimal symbol table entry from the ELF symbols already. |
| 9353 | Enter into partial symbol table if it has a location |
| 9354 | descriptor or a type. |
| 9355 | If the location descriptor is missing, new_symbol will create |
| 9356 | a LOC_UNRESOLVED symbol, the address of the variable will then |
| 9357 | be determined from the minimal symbol table whenever the variable |
| 9358 | is referenced. |
| 9359 | The address for the partial symbol table entry is not |
| 9360 | used by GDB, but it comes in handy for debugging partial symbol |
| 9361 | table building. */ |
| 9362 | |
| 9363 | if (pdi->d.locdesc || pdi->has_type) |
| 9364 | add_psymbol_to_list (actual_name, strlen (actual_name), |
| 9365 | built_actual_name != NULL, |
| 9366 | VAR_DOMAIN, LOC_STATIC, |
| 9367 | &objfile->global_psymbols, |
| 9368 | addr + baseaddr, |
| 9369 | cu->language, objfile); |
| 9370 | } |
| 9371 | else |
| 9372 | { |
| 9373 | int has_loc = pdi->d.locdesc != NULL; |
| 9374 | |
| 9375 | /* Static Variable. Skip symbols whose value we cannot know (those |
| 9376 | without location descriptors or constant values). */ |
| 9377 | if (!has_loc && !pdi->has_const_value) |
| 9378 | { |
| 9379 | xfree (built_actual_name); |
| 9380 | return; |
| 9381 | } |
| 9382 | |
| 9383 | add_psymbol_to_list (actual_name, strlen (actual_name), |
| 9384 | built_actual_name != NULL, |
| 9385 | VAR_DOMAIN, LOC_STATIC, |
| 9386 | &objfile->static_psymbols, |
| 9387 | has_loc ? addr + baseaddr : (CORE_ADDR) 0, |
| 9388 | cu->language, objfile); |
| 9389 | } |
| 9390 | break; |
| 9391 | case DW_TAG_typedef: |
| 9392 | case DW_TAG_base_type: |
| 9393 | case DW_TAG_subrange_type: |
| 9394 | add_psymbol_to_list (actual_name, strlen (actual_name), |
| 9395 | built_actual_name != NULL, |
| 9396 | VAR_DOMAIN, LOC_TYPEDEF, |
| 9397 | &objfile->static_psymbols, |
| 9398 | 0, cu->language, objfile); |
| 9399 | break; |
| 9400 | case DW_TAG_imported_declaration: |
| 9401 | case DW_TAG_namespace: |
| 9402 | add_psymbol_to_list (actual_name, strlen (actual_name), |
| 9403 | built_actual_name != NULL, |
| 9404 | VAR_DOMAIN, LOC_TYPEDEF, |
| 9405 | &objfile->global_psymbols, |
| 9406 | 0, cu->language, objfile); |
| 9407 | break; |
| 9408 | case DW_TAG_module: |
| 9409 | add_psymbol_to_list (actual_name, strlen (actual_name), |
| 9410 | built_actual_name != NULL, |
| 9411 | MODULE_DOMAIN, LOC_TYPEDEF, |
| 9412 | &objfile->global_psymbols, |
| 9413 | 0, cu->language, objfile); |
| 9414 | break; |
| 9415 | case DW_TAG_class_type: |
| 9416 | case DW_TAG_interface_type: |
| 9417 | case DW_TAG_structure_type: |
| 9418 | case DW_TAG_union_type: |
| 9419 | case DW_TAG_enumeration_type: |
| 9420 | /* Skip external references. The DWARF standard says in the section |
| 9421 | about "Structure, Union, and Class Type Entries": "An incomplete |
| 9422 | structure, union or class type is represented by a structure, |
| 9423 | union or class entry that does not have a byte size attribute |
| 9424 | and that has a DW_AT_declaration attribute." */ |
| 9425 | if (!pdi->has_byte_size && pdi->is_declaration) |
| 9426 | { |
| 9427 | xfree (built_actual_name); |
| 9428 | return; |
| 9429 | } |
| 9430 | |
| 9431 | /* NOTE: carlton/2003-10-07: See comment in new_symbol about |
| 9432 | static vs. global. */ |
| 9433 | add_psymbol_to_list (actual_name, strlen (actual_name), |
| 9434 | built_actual_name != NULL, |
| 9435 | STRUCT_DOMAIN, LOC_TYPEDEF, |
| 9436 | cu->language == language_cplus |
| 9437 | ? &objfile->global_psymbols |
| 9438 | : &objfile->static_psymbols, |
| 9439 | 0, cu->language, objfile); |
| 9440 | |
| 9441 | break; |
| 9442 | case DW_TAG_enumerator: |
| 9443 | add_psymbol_to_list (actual_name, strlen (actual_name), |
| 9444 | built_actual_name != NULL, |
| 9445 | VAR_DOMAIN, LOC_CONST, |
| 9446 | cu->language == language_cplus |
| 9447 | ? &objfile->global_psymbols |
| 9448 | : &objfile->static_psymbols, |
| 9449 | 0, cu->language, objfile); |
| 9450 | break; |
| 9451 | default: |
| 9452 | break; |
| 9453 | } |
| 9454 | |
| 9455 | xfree (built_actual_name); |
| 9456 | } |
| 9457 | |
| 9458 | /* Read a partial die corresponding to a namespace; also, add a symbol |
| 9459 | corresponding to that namespace to the symbol table. NAMESPACE is |
| 9460 | the name of the enclosing namespace. */ |
| 9461 | |
| 9462 | static void |
| 9463 | add_partial_namespace (struct partial_die_info *pdi, |
| 9464 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
| 9465 | int set_addrmap, struct dwarf2_cu *cu) |
| 9466 | { |
| 9467 | /* Add a symbol for the namespace. */ |
| 9468 | |
| 9469 | add_partial_symbol (pdi, cu); |
| 9470 | |
| 9471 | /* Now scan partial symbols in that namespace. */ |
| 9472 | |
| 9473 | if (pdi->has_children) |
| 9474 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
| 9475 | } |
| 9476 | |
| 9477 | /* Read a partial die corresponding to a Fortran module. */ |
| 9478 | |
| 9479 | static void |
| 9480 | add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, |
| 9481 | CORE_ADDR *highpc, int set_addrmap, struct dwarf2_cu *cu) |
| 9482 | { |
| 9483 | /* Add a symbol for the namespace. */ |
| 9484 | |
| 9485 | add_partial_symbol (pdi, cu); |
| 9486 | |
| 9487 | /* Now scan partial symbols in that module. */ |
| 9488 | |
| 9489 | if (pdi->has_children) |
| 9490 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
| 9491 | } |
| 9492 | |
| 9493 | /* Read a partial die corresponding to a subprogram or an inlined |
| 9494 | subprogram and create a partial symbol for that subprogram. |
| 9495 | When the CU language allows it, this routine also defines a partial |
| 9496 | symbol for each nested subprogram that this subprogram contains. |
| 9497 | If SET_ADDRMAP is true, record the covered ranges in the addrmap. |
| 9498 | Set *LOWPC and *HIGHPC to the lowest and highest PC values found in PDI. |
| 9499 | |
| 9500 | PDI may also be a lexical block, in which case we simply search |
| 9501 | recursively for subprograms defined inside that lexical block. |
| 9502 | Again, this is only performed when the CU language allows this |
| 9503 | type of definitions. */ |
| 9504 | |
| 9505 | static void |
| 9506 | add_partial_subprogram (struct partial_die_info *pdi, |
| 9507 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
| 9508 | int set_addrmap, struct dwarf2_cu *cu) |
| 9509 | { |
| 9510 | if (pdi->tag == DW_TAG_subprogram || pdi->tag == DW_TAG_inlined_subroutine) |
| 9511 | { |
| 9512 | if (pdi->has_pc_info) |
| 9513 | { |
| 9514 | if (pdi->lowpc < *lowpc) |
| 9515 | *lowpc = pdi->lowpc; |
| 9516 | if (pdi->highpc > *highpc) |
| 9517 | *highpc = pdi->highpc; |
| 9518 | if (set_addrmap) |
| 9519 | { |
| 9520 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 9521 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
| 9522 | CORE_ADDR baseaddr; |
| 9523 | CORE_ADDR highpc; |
| 9524 | CORE_ADDR lowpc; |
| 9525 | |
| 9526 | baseaddr = ANOFFSET (objfile->section_offsets, |
| 9527 | SECT_OFF_TEXT (objfile)); |
| 9528 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, |
| 9529 | pdi->lowpc + baseaddr); |
| 9530 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, |
| 9531 | pdi->highpc + baseaddr); |
| 9532 | addrmap_set_empty (objfile->psymtabs_addrmap, lowpc, highpc - 1, |
| 9533 | cu->per_cu->v.psymtab); |
| 9534 | } |
| 9535 | } |
| 9536 | |
| 9537 | if (pdi->has_pc_info || (!pdi->is_external && pdi->may_be_inlined)) |
| 9538 | { |
| 9539 | if (!pdi->is_declaration) |
| 9540 | /* Ignore subprogram DIEs that do not have a name, they are |
| 9541 | illegal. Do not emit a complaint at this point, we will |
| 9542 | do so when we convert this psymtab into a symtab. */ |
| 9543 | if (pdi->name) |
| 9544 | add_partial_symbol (pdi, cu); |
| 9545 | } |
| 9546 | } |
| 9547 | |
| 9548 | if (! pdi->has_children) |
| 9549 | return; |
| 9550 | |
| 9551 | if (cu->language == language_ada) |
| 9552 | { |
| 9553 | pdi = pdi->die_child; |
| 9554 | while (pdi != NULL) |
| 9555 | { |
| 9556 | fixup_partial_die (pdi, cu); |
| 9557 | if (pdi->tag == DW_TAG_subprogram |
| 9558 | || pdi->tag == DW_TAG_inlined_subroutine |
| 9559 | || pdi->tag == DW_TAG_lexical_block) |
| 9560 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
| 9561 | pdi = pdi->die_sibling; |
| 9562 | } |
| 9563 | } |
| 9564 | } |
| 9565 | |
| 9566 | /* Read a partial die corresponding to an enumeration type. */ |
| 9567 | |
| 9568 | static void |
| 9569 | add_partial_enumeration (struct partial_die_info *enum_pdi, |
| 9570 | struct dwarf2_cu *cu) |
| 9571 | { |
| 9572 | struct partial_die_info *pdi; |
| 9573 | |
| 9574 | if (enum_pdi->name != NULL) |
| 9575 | add_partial_symbol (enum_pdi, cu); |
| 9576 | |
| 9577 | pdi = enum_pdi->die_child; |
| 9578 | while (pdi) |
| 9579 | { |
| 9580 | if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL) |
| 9581 | complaint (&symfile_complaints, _("malformed enumerator DIE ignored")); |
| 9582 | else |
| 9583 | add_partial_symbol (pdi, cu); |
| 9584 | pdi = pdi->die_sibling; |
| 9585 | } |
| 9586 | } |
| 9587 | |
| 9588 | /* Return the initial uleb128 in the die at INFO_PTR. */ |
| 9589 | |
| 9590 | static unsigned int |
| 9591 | peek_abbrev_code (bfd *abfd, const gdb_byte *info_ptr) |
| 9592 | { |
| 9593 | unsigned int bytes_read; |
| 9594 | |
| 9595 | return read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
| 9596 | } |
| 9597 | |
| 9598 | /* Read the initial uleb128 in the die at INFO_PTR in compilation unit |
| 9599 | READER::CU. Use READER::ABBREV_TABLE to lookup any abbreviation. |
| 9600 | |
| 9601 | Return the corresponding abbrev, or NULL if the number is zero (indicating |
| 9602 | an empty DIE). In either case *BYTES_READ will be set to the length of |
| 9603 | the initial number. */ |
| 9604 | |
| 9605 | static struct abbrev_info * |
| 9606 | peek_die_abbrev (const die_reader_specs &reader, |
| 9607 | const gdb_byte *info_ptr, unsigned int *bytes_read) |
| 9608 | { |
| 9609 | dwarf2_cu *cu = reader.cu; |
| 9610 | bfd *abfd = cu->per_cu->dwarf2_per_objfile->objfile->obfd; |
| 9611 | unsigned int abbrev_number |
| 9612 | = read_unsigned_leb128 (abfd, info_ptr, bytes_read); |
| 9613 | |
| 9614 | if (abbrev_number == 0) |
| 9615 | return NULL; |
| 9616 | |
| 9617 | abbrev_info *abbrev = reader.abbrev_table->lookup_abbrev (abbrev_number); |
| 9618 | if (!abbrev) |
| 9619 | { |
| 9620 | error (_("Dwarf Error: Could not find abbrev number %d in %s" |
| 9621 | " at offset 0x%x [in module %s]"), |
| 9622 | abbrev_number, cu->per_cu->is_debug_types ? "TU" : "CU", |
| 9623 | to_underlying (cu->header.sect_off), bfd_get_filename (abfd)); |
| 9624 | } |
| 9625 | |
| 9626 | return abbrev; |
| 9627 | } |
| 9628 | |
| 9629 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
| 9630 | Returns a pointer to the end of a series of DIEs, terminated by an empty |
| 9631 | DIE. Any children of the skipped DIEs will also be skipped. */ |
| 9632 | |
| 9633 | static const gdb_byte * |
| 9634 | skip_children (const struct die_reader_specs *reader, const gdb_byte *info_ptr) |
| 9635 | { |
| 9636 | while (1) |
| 9637 | { |
| 9638 | unsigned int bytes_read; |
| 9639 | abbrev_info *abbrev = peek_die_abbrev (*reader, info_ptr, &bytes_read); |
| 9640 | |
| 9641 | if (abbrev == NULL) |
| 9642 | return info_ptr + bytes_read; |
| 9643 | else |
| 9644 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
| 9645 | } |
| 9646 | } |
| 9647 | |
| 9648 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
| 9649 | INFO_PTR should point just after the initial uleb128 of a DIE, and the |
| 9650 | abbrev corresponding to that skipped uleb128 should be passed in |
| 9651 | ABBREV. Returns a pointer to this DIE's sibling, skipping any |
| 9652 | children. */ |
| 9653 | |
| 9654 | static const gdb_byte * |
| 9655 | skip_one_die (const struct die_reader_specs *reader, const gdb_byte *info_ptr, |
| 9656 | struct abbrev_info *abbrev) |
| 9657 | { |
| 9658 | unsigned int bytes_read; |
| 9659 | struct attribute attr; |
| 9660 | bfd *abfd = reader->abfd; |
| 9661 | struct dwarf2_cu *cu = reader->cu; |
| 9662 | const gdb_byte *buffer = reader->buffer; |
| 9663 | const gdb_byte *buffer_end = reader->buffer_end; |
| 9664 | unsigned int form, i; |
| 9665 | |
| 9666 | for (i = 0; i < abbrev->num_attrs; i++) |
| 9667 | { |
| 9668 | /* The only abbrev we care about is DW_AT_sibling. */ |
| 9669 | if (abbrev->attrs[i].name == DW_AT_sibling) |
| 9670 | { |
| 9671 | read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr); |
| 9672 | if (attr.form == DW_FORM_ref_addr) |
| 9673 | complaint (&symfile_complaints, |
| 9674 | _("ignoring absolute DW_AT_sibling")); |
| 9675 | else |
| 9676 | { |
| 9677 | sect_offset off = dwarf2_get_ref_die_offset (&attr); |
| 9678 | const gdb_byte *sibling_ptr = buffer + to_underlying (off); |
| 9679 | |
| 9680 | if (sibling_ptr < info_ptr) |
| 9681 | complaint (&symfile_complaints, |
| 9682 | _("DW_AT_sibling points backwards")); |
| 9683 | else if (sibling_ptr > reader->buffer_end) |
| 9684 | dwarf2_section_buffer_overflow_complaint (reader->die_section); |
| 9685 | else |
| 9686 | return sibling_ptr; |
| 9687 | } |
| 9688 | } |
| 9689 | |
| 9690 | /* If it isn't DW_AT_sibling, skip this attribute. */ |
| 9691 | form = abbrev->attrs[i].form; |
| 9692 | skip_attribute: |
| 9693 | switch (form) |
| 9694 | { |
| 9695 | case DW_FORM_ref_addr: |
| 9696 | /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3 |
| 9697 | and later it is offset sized. */ |
| 9698 | if (cu->header.version == 2) |
| 9699 | info_ptr += cu->header.addr_size; |
| 9700 | else |
| 9701 | info_ptr += cu->header.offset_size; |
| 9702 | break; |
| 9703 | case DW_FORM_GNU_ref_alt: |
| 9704 | info_ptr += cu->header.offset_size; |
| 9705 | break; |
| 9706 | case DW_FORM_addr: |
| 9707 | info_ptr += cu->header.addr_size; |
| 9708 | break; |
| 9709 | case DW_FORM_data1: |
| 9710 | case DW_FORM_ref1: |
| 9711 | case DW_FORM_flag: |
| 9712 | info_ptr += 1; |
| 9713 | break; |
| 9714 | case DW_FORM_flag_present: |
| 9715 | case DW_FORM_implicit_const: |
| 9716 | break; |
| 9717 | case DW_FORM_data2: |
| 9718 | case DW_FORM_ref2: |
| 9719 | info_ptr += 2; |
| 9720 | break; |
| 9721 | case DW_FORM_data4: |
| 9722 | case DW_FORM_ref4: |
| 9723 | info_ptr += 4; |
| 9724 | break; |
| 9725 | case DW_FORM_data8: |
| 9726 | case DW_FORM_ref8: |
| 9727 | case DW_FORM_ref_sig8: |
| 9728 | info_ptr += 8; |
| 9729 | break; |
| 9730 | case DW_FORM_data16: |
| 9731 | info_ptr += 16; |
| 9732 | break; |
| 9733 | case DW_FORM_string: |
| 9734 | read_direct_string (abfd, info_ptr, &bytes_read); |
| 9735 | info_ptr += bytes_read; |
| 9736 | break; |
| 9737 | case DW_FORM_sec_offset: |
| 9738 | case DW_FORM_strp: |
| 9739 | case DW_FORM_GNU_strp_alt: |
| 9740 | info_ptr += cu->header.offset_size; |
| 9741 | break; |
| 9742 | case DW_FORM_exprloc: |
| 9743 | case DW_FORM_block: |
| 9744 | info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
| 9745 | info_ptr += bytes_read; |
| 9746 | break; |
| 9747 | case DW_FORM_block1: |
| 9748 | info_ptr += 1 + read_1_byte (abfd, info_ptr); |
| 9749 | break; |
| 9750 | case DW_FORM_block2: |
| 9751 | info_ptr += 2 + read_2_bytes (abfd, info_ptr); |
| 9752 | break; |
| 9753 | case DW_FORM_block4: |
| 9754 | info_ptr += 4 + read_4_bytes (abfd, info_ptr); |
| 9755 | break; |
| 9756 | case DW_FORM_sdata: |
| 9757 | case DW_FORM_udata: |
| 9758 | case DW_FORM_ref_udata: |
| 9759 | case DW_FORM_GNU_addr_index: |
| 9760 | case DW_FORM_GNU_str_index: |
| 9761 | info_ptr = safe_skip_leb128 (info_ptr, buffer_end); |
| 9762 | break; |
| 9763 | case DW_FORM_indirect: |
| 9764 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
| 9765 | info_ptr += bytes_read; |
| 9766 | /* We need to continue parsing from here, so just go back to |
| 9767 | the top. */ |
| 9768 | goto skip_attribute; |
| 9769 | |
| 9770 | default: |
| 9771 | error (_("Dwarf Error: Cannot handle %s " |
| 9772 | "in DWARF reader [in module %s]"), |
| 9773 | dwarf_form_name (form), |
| 9774 | bfd_get_filename (abfd)); |
| 9775 | } |
| 9776 | } |
| 9777 | |
| 9778 | if (abbrev->has_children) |
| 9779 | return skip_children (reader, info_ptr); |
| 9780 | else |
| 9781 | return info_ptr; |
| 9782 | } |
| 9783 | |
| 9784 | /* Locate ORIG_PDI's sibling. |
| 9785 | INFO_PTR should point to the start of the next DIE after ORIG_PDI. */ |
| 9786 | |
| 9787 | static const gdb_byte * |
| 9788 | locate_pdi_sibling (const struct die_reader_specs *reader, |
| 9789 | struct partial_die_info *orig_pdi, |
| 9790 | const gdb_byte *info_ptr) |
| 9791 | { |
| 9792 | /* Do we know the sibling already? */ |
| 9793 | |
| 9794 | if (orig_pdi->sibling) |
| 9795 | return orig_pdi->sibling; |
| 9796 | |
| 9797 | /* Are there any children to deal with? */ |
| 9798 | |
| 9799 | if (!orig_pdi->has_children) |
| 9800 | return info_ptr; |
| 9801 | |
| 9802 | /* Skip the children the long way. */ |
| 9803 | |
| 9804 | return skip_children (reader, info_ptr); |
| 9805 | } |
| 9806 | |
| 9807 | /* Expand this partial symbol table into a full symbol table. SELF is |
| 9808 | not NULL. */ |
| 9809 | |
| 9810 | static void |
| 9811 | dwarf2_read_symtab (struct partial_symtab *self, |
| 9812 | struct objfile *objfile) |
| 9813 | { |
| 9814 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 9815 | = get_dwarf2_per_objfile (objfile); |
| 9816 | |
| 9817 | if (self->readin) |
| 9818 | { |
| 9819 | warning (_("bug: psymtab for %s is already read in."), |
| 9820 | self->filename); |
| 9821 | } |
| 9822 | else |
| 9823 | { |
| 9824 | if (info_verbose) |
| 9825 | { |
| 9826 | printf_filtered (_("Reading in symbols for %s..."), |
| 9827 | self->filename); |
| 9828 | gdb_flush (gdb_stdout); |
| 9829 | } |
| 9830 | |
| 9831 | /* If this psymtab is constructed from a debug-only objfile, the |
| 9832 | has_section_at_zero flag will not necessarily be correct. We |
| 9833 | can get the correct value for this flag by looking at the data |
| 9834 | associated with the (presumably stripped) associated objfile. */ |
| 9835 | if (objfile->separate_debug_objfile_backlink) |
| 9836 | { |
| 9837 | struct dwarf2_per_objfile *dpo_backlink |
| 9838 | = get_dwarf2_per_objfile (objfile->separate_debug_objfile_backlink); |
| 9839 | |
| 9840 | dwarf2_per_objfile->has_section_at_zero |
| 9841 | = dpo_backlink->has_section_at_zero; |
| 9842 | } |
| 9843 | |
| 9844 | dwarf2_per_objfile->reading_partial_symbols = 0; |
| 9845 | |
| 9846 | psymtab_to_symtab_1 (self); |
| 9847 | |
| 9848 | /* Finish up the debug error message. */ |
| 9849 | if (info_verbose) |
| 9850 | printf_filtered (_("done.\n")); |
| 9851 | } |
| 9852 | |
| 9853 | process_cu_includes (dwarf2_per_objfile); |
| 9854 | } |
| 9855 | \f |
| 9856 | /* Reading in full CUs. */ |
| 9857 | |
| 9858 | /* Add PER_CU to the queue. */ |
| 9859 | |
| 9860 | static void |
| 9861 | queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
| 9862 | enum language pretend_language) |
| 9863 | { |
| 9864 | struct dwarf2_queue_item *item; |
| 9865 | |
| 9866 | per_cu->queued = 1; |
| 9867 | item = XNEW (struct dwarf2_queue_item); |
| 9868 | item->per_cu = per_cu; |
| 9869 | item->pretend_language = pretend_language; |
| 9870 | item->next = NULL; |
| 9871 | |
| 9872 | if (dwarf2_queue == NULL) |
| 9873 | dwarf2_queue = item; |
| 9874 | else |
| 9875 | dwarf2_queue_tail->next = item; |
| 9876 | |
| 9877 | dwarf2_queue_tail = item; |
| 9878 | } |
| 9879 | |
| 9880 | /* If PER_CU is not yet queued, add it to the queue. |
| 9881 | If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a |
| 9882 | dependency. |
| 9883 | The result is non-zero if PER_CU was queued, otherwise the result is zero |
| 9884 | meaning either PER_CU is already queued or it is already loaded. |
| 9885 | |
| 9886 | N.B. There is an invariant here that if a CU is queued then it is loaded. |
| 9887 | The caller is required to load PER_CU if we return non-zero. */ |
| 9888 | |
| 9889 | static int |
| 9890 | maybe_queue_comp_unit (struct dwarf2_cu *dependent_cu, |
| 9891 | struct dwarf2_per_cu_data *per_cu, |
| 9892 | enum language pretend_language) |
| 9893 | { |
| 9894 | /* We may arrive here during partial symbol reading, if we need full |
| 9895 | DIEs to process an unusual case (e.g. template arguments). Do |
| 9896 | not queue PER_CU, just tell our caller to load its DIEs. */ |
| 9897 | if (per_cu->dwarf2_per_objfile->reading_partial_symbols) |
| 9898 | { |
| 9899 | if (per_cu->cu == NULL || per_cu->cu->dies == NULL) |
| 9900 | return 1; |
| 9901 | return 0; |
| 9902 | } |
| 9903 | |
| 9904 | /* Mark the dependence relation so that we don't flush PER_CU |
| 9905 | too early. */ |
| 9906 | if (dependent_cu != NULL) |
| 9907 | dwarf2_add_dependence (dependent_cu, per_cu); |
| 9908 | |
| 9909 | /* If it's already on the queue, we have nothing to do. */ |
| 9910 | if (per_cu->queued) |
| 9911 | return 0; |
| 9912 | |
| 9913 | /* If the compilation unit is already loaded, just mark it as |
| 9914 | used. */ |
| 9915 | if (per_cu->cu != NULL) |
| 9916 | { |
| 9917 | per_cu->cu->last_used = 0; |
| 9918 | return 0; |
| 9919 | } |
| 9920 | |
| 9921 | /* Add it to the queue. */ |
| 9922 | queue_comp_unit (per_cu, pretend_language); |
| 9923 | |
| 9924 | return 1; |
| 9925 | } |
| 9926 | |
| 9927 | /* Process the queue. */ |
| 9928 | |
| 9929 | static void |
| 9930 | process_queue (struct dwarf2_per_objfile *dwarf2_per_objfile) |
| 9931 | { |
| 9932 | struct dwarf2_queue_item *item, *next_item; |
| 9933 | |
| 9934 | if (dwarf_read_debug) |
| 9935 | { |
| 9936 | fprintf_unfiltered (gdb_stdlog, |
| 9937 | "Expanding one or more symtabs of objfile %s ...\n", |
| 9938 | objfile_name (dwarf2_per_objfile->objfile)); |
| 9939 | } |
| 9940 | |
| 9941 | /* The queue starts out with one item, but following a DIE reference |
| 9942 | may load a new CU, adding it to the end of the queue. */ |
| 9943 | for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item) |
| 9944 | { |
| 9945 | if ((dwarf2_per_objfile->using_index |
| 9946 | ? !item->per_cu->v.quick->compunit_symtab |
| 9947 | : (item->per_cu->v.psymtab && !item->per_cu->v.psymtab->readin)) |
| 9948 | /* Skip dummy CUs. */ |
| 9949 | && item->per_cu->cu != NULL) |
| 9950 | { |
| 9951 | struct dwarf2_per_cu_data *per_cu = item->per_cu; |
| 9952 | unsigned int debug_print_threshold; |
| 9953 | char buf[100]; |
| 9954 | |
| 9955 | if (per_cu->is_debug_types) |
| 9956 | { |
| 9957 | struct signatured_type *sig_type = |
| 9958 | (struct signatured_type *) per_cu; |
| 9959 | |
| 9960 | sprintf (buf, "TU %s at offset 0x%x", |
| 9961 | hex_string (sig_type->signature), |
| 9962 | to_underlying (per_cu->sect_off)); |
| 9963 | /* There can be 100s of TUs. |
| 9964 | Only print them in verbose mode. */ |
| 9965 | debug_print_threshold = 2; |
| 9966 | } |
| 9967 | else |
| 9968 | { |
| 9969 | sprintf (buf, "CU at offset 0x%x", |
| 9970 | to_underlying (per_cu->sect_off)); |
| 9971 | debug_print_threshold = 1; |
| 9972 | } |
| 9973 | |
| 9974 | if (dwarf_read_debug >= debug_print_threshold) |
| 9975 | fprintf_unfiltered (gdb_stdlog, "Expanding symtab of %s\n", buf); |
| 9976 | |
| 9977 | if (per_cu->is_debug_types) |
| 9978 | process_full_type_unit (per_cu, item->pretend_language); |
| 9979 | else |
| 9980 | process_full_comp_unit (per_cu, item->pretend_language); |
| 9981 | |
| 9982 | if (dwarf_read_debug >= debug_print_threshold) |
| 9983 | fprintf_unfiltered (gdb_stdlog, "Done expanding %s\n", buf); |
| 9984 | } |
| 9985 | |
| 9986 | item->per_cu->queued = 0; |
| 9987 | next_item = item->next; |
| 9988 | xfree (item); |
| 9989 | } |
| 9990 | |
| 9991 | dwarf2_queue_tail = NULL; |
| 9992 | |
| 9993 | if (dwarf_read_debug) |
| 9994 | { |
| 9995 | fprintf_unfiltered (gdb_stdlog, "Done expanding symtabs of %s.\n", |
| 9996 | objfile_name (dwarf2_per_objfile->objfile)); |
| 9997 | } |
| 9998 | } |
| 9999 | |
| 10000 | /* Read in full symbols for PST, and anything it depends on. */ |
| 10001 | |
| 10002 | static void |
| 10003 | psymtab_to_symtab_1 (struct partial_symtab *pst) |
| 10004 | { |
| 10005 | struct dwarf2_per_cu_data *per_cu; |
| 10006 | int i; |
| 10007 | |
| 10008 | if (pst->readin) |
| 10009 | return; |
| 10010 | |
| 10011 | for (i = 0; i < pst->number_of_dependencies; i++) |
| 10012 | if (!pst->dependencies[i]->readin |
| 10013 | && pst->dependencies[i]->user == NULL) |
| 10014 | { |
| 10015 | /* Inform about additional files that need to be read in. */ |
| 10016 | if (info_verbose) |
| 10017 | { |
| 10018 | /* FIXME: i18n: Need to make this a single string. */ |
| 10019 | fputs_filtered (" ", gdb_stdout); |
| 10020 | wrap_here (""); |
| 10021 | fputs_filtered ("and ", gdb_stdout); |
| 10022 | wrap_here (""); |
| 10023 | printf_filtered ("%s...", pst->dependencies[i]->filename); |
| 10024 | wrap_here (""); /* Flush output. */ |
| 10025 | gdb_flush (gdb_stdout); |
| 10026 | } |
| 10027 | psymtab_to_symtab_1 (pst->dependencies[i]); |
| 10028 | } |
| 10029 | |
| 10030 | per_cu = (struct dwarf2_per_cu_data *) pst->read_symtab_private; |
| 10031 | |
| 10032 | if (per_cu == NULL) |
| 10033 | { |
| 10034 | /* It's an include file, no symbols to read for it. |
| 10035 | Everything is in the parent symtab. */ |
| 10036 | pst->readin = 1; |
| 10037 | return; |
| 10038 | } |
| 10039 | |
| 10040 | dw2_do_instantiate_symtab (per_cu); |
| 10041 | } |
| 10042 | |
| 10043 | /* Trivial hash function for die_info: the hash value of a DIE |
| 10044 | is its offset in .debug_info for this objfile. */ |
| 10045 | |
| 10046 | static hashval_t |
| 10047 | die_hash (const void *item) |
| 10048 | { |
| 10049 | const struct die_info *die = (const struct die_info *) item; |
| 10050 | |
| 10051 | return to_underlying (die->sect_off); |
| 10052 | } |
| 10053 | |
| 10054 | /* Trivial comparison function for die_info structures: two DIEs |
| 10055 | are equal if they have the same offset. */ |
| 10056 | |
| 10057 | static int |
| 10058 | die_eq (const void *item_lhs, const void *item_rhs) |
| 10059 | { |
| 10060 | const struct die_info *die_lhs = (const struct die_info *) item_lhs; |
| 10061 | const struct die_info *die_rhs = (const struct die_info *) item_rhs; |
| 10062 | |
| 10063 | return die_lhs->sect_off == die_rhs->sect_off; |
| 10064 | } |
| 10065 | |
| 10066 | /* die_reader_func for load_full_comp_unit. |
| 10067 | This is identical to read_signatured_type_reader, |
| 10068 | but is kept separate for now. */ |
| 10069 | |
| 10070 | static void |
| 10071 | load_full_comp_unit_reader (const struct die_reader_specs *reader, |
| 10072 | const gdb_byte *info_ptr, |
| 10073 | struct die_info *comp_unit_die, |
| 10074 | int has_children, |
| 10075 | void *data) |
| 10076 | { |
| 10077 | struct dwarf2_cu *cu = reader->cu; |
| 10078 | enum language *language_ptr = (enum language *) data; |
| 10079 | |
| 10080 | gdb_assert (cu->die_hash == NULL); |
| 10081 | cu->die_hash = |
| 10082 | htab_create_alloc_ex (cu->header.length / 12, |
| 10083 | die_hash, |
| 10084 | die_eq, |
| 10085 | NULL, |
| 10086 | &cu->comp_unit_obstack, |
| 10087 | hashtab_obstack_allocate, |
| 10088 | dummy_obstack_deallocate); |
| 10089 | |
| 10090 | if (has_children) |
| 10091 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, |
| 10092 | &info_ptr, comp_unit_die); |
| 10093 | cu->dies = comp_unit_die; |
| 10094 | /* comp_unit_die is not stored in die_hash, no need. */ |
| 10095 | |
| 10096 | /* We try not to read any attributes in this function, because not |
| 10097 | all CUs needed for references have been loaded yet, and symbol |
| 10098 | table processing isn't initialized. But we have to set the CU language, |
| 10099 | or we won't be able to build types correctly. |
| 10100 | Similarly, if we do not read the producer, we can not apply |
| 10101 | producer-specific interpretation. */ |
| 10102 | prepare_one_comp_unit (cu, cu->dies, *language_ptr); |
| 10103 | } |
| 10104 | |
| 10105 | /* Load the DIEs associated with PER_CU into memory. */ |
| 10106 | |
| 10107 | static void |
| 10108 | load_full_comp_unit (struct dwarf2_per_cu_data *this_cu, |
| 10109 | enum language pretend_language) |
| 10110 | { |
| 10111 | gdb_assert (! this_cu->is_debug_types); |
| 10112 | |
| 10113 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, |
| 10114 | load_full_comp_unit_reader, &pretend_language); |
| 10115 | } |
| 10116 | |
| 10117 | /* Add a DIE to the delayed physname list. */ |
| 10118 | |
| 10119 | static void |
| 10120 | add_to_method_list (struct type *type, int fnfield_index, int index, |
| 10121 | const char *name, struct die_info *die, |
| 10122 | struct dwarf2_cu *cu) |
| 10123 | { |
| 10124 | struct delayed_method_info mi; |
| 10125 | mi.type = type; |
| 10126 | mi.fnfield_index = fnfield_index; |
| 10127 | mi.index = index; |
| 10128 | mi.name = name; |
| 10129 | mi.die = die; |
| 10130 | cu->method_list.push_back (mi); |
| 10131 | } |
| 10132 | |
| 10133 | /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like |
| 10134 | "const" / "volatile". If so, decrements LEN by the length of the |
| 10135 | modifier and return true. Otherwise return false. */ |
| 10136 | |
| 10137 | template<size_t N> |
| 10138 | static bool |
| 10139 | check_modifier (const char *physname, size_t &len, const char (&mod)[N]) |
| 10140 | { |
| 10141 | size_t mod_len = sizeof (mod) - 1; |
| 10142 | if (len > mod_len && startswith (physname + (len - mod_len), mod)) |
| 10143 | { |
| 10144 | len -= mod_len; |
| 10145 | return true; |
| 10146 | } |
| 10147 | return false; |
| 10148 | } |
| 10149 | |
| 10150 | /* Compute the physnames of any methods on the CU's method list. |
| 10151 | |
| 10152 | The computation of method physnames is delayed in order to avoid the |
| 10153 | (bad) condition that one of the method's formal parameters is of an as yet |
| 10154 | incomplete type. */ |
| 10155 | |
| 10156 | static void |
| 10157 | compute_delayed_physnames (struct dwarf2_cu *cu) |
| 10158 | { |
| 10159 | /* Only C++ delays computing physnames. */ |
| 10160 | if (cu->method_list.empty ()) |
| 10161 | return; |
| 10162 | gdb_assert (cu->language == language_cplus); |
| 10163 | |
| 10164 | for (struct delayed_method_info &mi : cu->method_list) |
| 10165 | { |
| 10166 | const char *physname; |
| 10167 | struct fn_fieldlist *fn_flp |
| 10168 | = &TYPE_FN_FIELDLIST (mi.type, mi.fnfield_index); |
| 10169 | physname = dwarf2_physname (mi.name, mi.die, cu); |
| 10170 | TYPE_FN_FIELD_PHYSNAME (fn_flp->fn_fields, mi.index) |
| 10171 | = physname ? physname : ""; |
| 10172 | |
| 10173 | /* Since there's no tag to indicate whether a method is a |
| 10174 | const/volatile overload, extract that information out of the |
| 10175 | demangled name. */ |
| 10176 | if (physname != NULL) |
| 10177 | { |
| 10178 | size_t len = strlen (physname); |
| 10179 | |
| 10180 | while (1) |
| 10181 | { |
| 10182 | if (physname[len] == ')') /* shortcut */ |
| 10183 | break; |
| 10184 | else if (check_modifier (physname, len, " const")) |
| 10185 | TYPE_FN_FIELD_CONST (fn_flp->fn_fields, mi.index) = 1; |
| 10186 | else if (check_modifier (physname, len, " volatile")) |
| 10187 | TYPE_FN_FIELD_VOLATILE (fn_flp->fn_fields, mi.index) = 1; |
| 10188 | else |
| 10189 | break; |
| 10190 | } |
| 10191 | } |
| 10192 | } |
| 10193 | |
| 10194 | /* The list is no longer needed. */ |
| 10195 | cu->method_list.clear (); |
| 10196 | } |
| 10197 | |
| 10198 | /* Go objects should be embedded in a DW_TAG_module DIE, |
| 10199 | and it's not clear if/how imported objects will appear. |
| 10200 | To keep Go support simple until that's worked out, |
| 10201 | go back through what we've read and create something usable. |
| 10202 | We could do this while processing each DIE, and feels kinda cleaner, |
| 10203 | but that way is more invasive. |
| 10204 | This is to, for example, allow the user to type "p var" or "b main" |
| 10205 | without having to specify the package name, and allow lookups |
| 10206 | of module.object to work in contexts that use the expression |
| 10207 | parser. */ |
| 10208 | |
| 10209 | static void |
| 10210 | fixup_go_packaging (struct dwarf2_cu *cu) |
| 10211 | { |
| 10212 | char *package_name = NULL; |
| 10213 | struct pending *list; |
| 10214 | int i; |
| 10215 | |
| 10216 | for (list = global_symbols; list != NULL; list = list->next) |
| 10217 | { |
| 10218 | for (i = 0; i < list->nsyms; ++i) |
| 10219 | { |
| 10220 | struct symbol *sym = list->symbol[i]; |
| 10221 | |
| 10222 | if (SYMBOL_LANGUAGE (sym) == language_go |
| 10223 | && SYMBOL_CLASS (sym) == LOC_BLOCK) |
| 10224 | { |
| 10225 | char *this_package_name = go_symbol_package_name (sym); |
| 10226 | |
| 10227 | if (this_package_name == NULL) |
| 10228 | continue; |
| 10229 | if (package_name == NULL) |
| 10230 | package_name = this_package_name; |
| 10231 | else |
| 10232 | { |
| 10233 | struct objfile *objfile |
| 10234 | = cu->per_cu->dwarf2_per_objfile->objfile; |
| 10235 | if (strcmp (package_name, this_package_name) != 0) |
| 10236 | complaint (&symfile_complaints, |
| 10237 | _("Symtab %s has objects from two different Go packages: %s and %s"), |
| 10238 | (symbol_symtab (sym) != NULL |
| 10239 | ? symtab_to_filename_for_display |
| 10240 | (symbol_symtab (sym)) |
| 10241 | : objfile_name (objfile)), |
| 10242 | this_package_name, package_name); |
| 10243 | xfree (this_package_name); |
| 10244 | } |
| 10245 | } |
| 10246 | } |
| 10247 | } |
| 10248 | |
| 10249 | if (package_name != NULL) |
| 10250 | { |
| 10251 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 10252 | const char *saved_package_name |
| 10253 | = (const char *) obstack_copy0 (&objfile->per_bfd->storage_obstack, |
| 10254 | package_name, |
| 10255 | strlen (package_name)); |
| 10256 | struct type *type = init_type (objfile, TYPE_CODE_MODULE, 0, |
| 10257 | saved_package_name); |
| 10258 | struct symbol *sym; |
| 10259 | |
| 10260 | TYPE_TAG_NAME (type) = TYPE_NAME (type); |
| 10261 | |
| 10262 | sym = allocate_symbol (objfile); |
| 10263 | SYMBOL_SET_LANGUAGE (sym, language_go, &objfile->objfile_obstack); |
| 10264 | SYMBOL_SET_NAMES (sym, saved_package_name, |
| 10265 | strlen (saved_package_name), 0, objfile); |
| 10266 | /* This is not VAR_DOMAIN because we want a way to ensure a lookup of, |
| 10267 | e.g., "main" finds the "main" module and not C's main(). */ |
| 10268 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; |
| 10269 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
| 10270 | SYMBOL_TYPE (sym) = type; |
| 10271 | |
| 10272 | add_symbol_to_list (sym, &global_symbols); |
| 10273 | |
| 10274 | xfree (package_name); |
| 10275 | } |
| 10276 | } |
| 10277 | |
| 10278 | /* Return the symtab for PER_CU. This works properly regardless of |
| 10279 | whether we're using the index or psymtabs. */ |
| 10280 | |
| 10281 | static struct compunit_symtab * |
| 10282 | get_compunit_symtab (struct dwarf2_per_cu_data *per_cu) |
| 10283 | { |
| 10284 | return (per_cu->dwarf2_per_objfile->using_index |
| 10285 | ? per_cu->v.quick->compunit_symtab |
| 10286 | : per_cu->v.psymtab->compunit_symtab); |
| 10287 | } |
| 10288 | |
| 10289 | /* A helper function for computing the list of all symbol tables |
| 10290 | included by PER_CU. */ |
| 10291 | |
| 10292 | static void |
| 10293 | recursively_compute_inclusions (VEC (compunit_symtab_ptr) **result, |
| 10294 | htab_t all_children, htab_t all_type_symtabs, |
| 10295 | struct dwarf2_per_cu_data *per_cu, |
| 10296 | struct compunit_symtab *immediate_parent) |
| 10297 | { |
| 10298 | void **slot; |
| 10299 | int ix; |
| 10300 | struct compunit_symtab *cust; |
| 10301 | struct dwarf2_per_cu_data *iter; |
| 10302 | |
| 10303 | slot = htab_find_slot (all_children, per_cu, INSERT); |
| 10304 | if (*slot != NULL) |
| 10305 | { |
| 10306 | /* This inclusion and its children have been processed. */ |
| 10307 | return; |
| 10308 | } |
| 10309 | |
| 10310 | *slot = per_cu; |
| 10311 | /* Only add a CU if it has a symbol table. */ |
| 10312 | cust = get_compunit_symtab (per_cu); |
| 10313 | if (cust != NULL) |
| 10314 | { |
| 10315 | /* If this is a type unit only add its symbol table if we haven't |
| 10316 | seen it yet (type unit per_cu's can share symtabs). */ |
| 10317 | if (per_cu->is_debug_types) |
| 10318 | { |
| 10319 | slot = htab_find_slot (all_type_symtabs, cust, INSERT); |
| 10320 | if (*slot == NULL) |
| 10321 | { |
| 10322 | *slot = cust; |
| 10323 | VEC_safe_push (compunit_symtab_ptr, *result, cust); |
| 10324 | if (cust->user == NULL) |
| 10325 | cust->user = immediate_parent; |
| 10326 | } |
| 10327 | } |
| 10328 | else |
| 10329 | { |
| 10330 | VEC_safe_push (compunit_symtab_ptr, *result, cust); |
| 10331 | if (cust->user == NULL) |
| 10332 | cust->user = immediate_parent; |
| 10333 | } |
| 10334 | } |
| 10335 | |
| 10336 | for (ix = 0; |
| 10337 | VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, ix, iter); |
| 10338 | ++ix) |
| 10339 | { |
| 10340 | recursively_compute_inclusions (result, all_children, |
| 10341 | all_type_symtabs, iter, cust); |
| 10342 | } |
| 10343 | } |
| 10344 | |
| 10345 | /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of |
| 10346 | PER_CU. */ |
| 10347 | |
| 10348 | static void |
| 10349 | compute_compunit_symtab_includes (struct dwarf2_per_cu_data *per_cu) |
| 10350 | { |
| 10351 | gdb_assert (! per_cu->is_debug_types); |
| 10352 | |
| 10353 | if (!VEC_empty (dwarf2_per_cu_ptr, per_cu->imported_symtabs)) |
| 10354 | { |
| 10355 | int ix, len; |
| 10356 | struct dwarf2_per_cu_data *per_cu_iter; |
| 10357 | struct compunit_symtab *compunit_symtab_iter; |
| 10358 | VEC (compunit_symtab_ptr) *result_symtabs = NULL; |
| 10359 | htab_t all_children, all_type_symtabs; |
| 10360 | struct compunit_symtab *cust = get_compunit_symtab (per_cu); |
| 10361 | |
| 10362 | /* If we don't have a symtab, we can just skip this case. */ |
| 10363 | if (cust == NULL) |
| 10364 | return; |
| 10365 | |
| 10366 | all_children = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, |
| 10367 | NULL, xcalloc, xfree); |
| 10368 | all_type_symtabs = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, |
| 10369 | NULL, xcalloc, xfree); |
| 10370 | |
| 10371 | for (ix = 0; |
| 10372 | VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, |
| 10373 | ix, per_cu_iter); |
| 10374 | ++ix) |
| 10375 | { |
| 10376 | recursively_compute_inclusions (&result_symtabs, all_children, |
| 10377 | all_type_symtabs, per_cu_iter, |
| 10378 | cust); |
| 10379 | } |
| 10380 | |
| 10381 | /* Now we have a transitive closure of all the included symtabs. */ |
| 10382 | len = VEC_length (compunit_symtab_ptr, result_symtabs); |
| 10383 | cust->includes |
| 10384 | = XOBNEWVEC (&per_cu->dwarf2_per_objfile->objfile->objfile_obstack, |
| 10385 | struct compunit_symtab *, len + 1); |
| 10386 | for (ix = 0; |
| 10387 | VEC_iterate (compunit_symtab_ptr, result_symtabs, ix, |
| 10388 | compunit_symtab_iter); |
| 10389 | ++ix) |
| 10390 | cust->includes[ix] = compunit_symtab_iter; |
| 10391 | cust->includes[len] = NULL; |
| 10392 | |
| 10393 | VEC_free (compunit_symtab_ptr, result_symtabs); |
| 10394 | htab_delete (all_children); |
| 10395 | htab_delete (all_type_symtabs); |
| 10396 | } |
| 10397 | } |
| 10398 | |
| 10399 | /* Compute the 'includes' field for the symtabs of all the CUs we just |
| 10400 | read. */ |
| 10401 | |
| 10402 | static void |
| 10403 | process_cu_includes (struct dwarf2_per_objfile *dwarf2_per_objfile) |
| 10404 | { |
| 10405 | int ix; |
| 10406 | struct dwarf2_per_cu_data *iter; |
| 10407 | |
| 10408 | for (ix = 0; |
| 10409 | VEC_iterate (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, |
| 10410 | ix, iter); |
| 10411 | ++ix) |
| 10412 | { |
| 10413 | if (! iter->is_debug_types) |
| 10414 | compute_compunit_symtab_includes (iter); |
| 10415 | } |
| 10416 | |
| 10417 | VEC_free (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus); |
| 10418 | } |
| 10419 | |
| 10420 | /* Generate full symbol information for PER_CU, whose DIEs have |
| 10421 | already been loaded into memory. */ |
| 10422 | |
| 10423 | static void |
| 10424 | process_full_comp_unit (struct dwarf2_per_cu_data *per_cu, |
| 10425 | enum language pretend_language) |
| 10426 | { |
| 10427 | struct dwarf2_cu *cu = per_cu->cu; |
| 10428 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
| 10429 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 10430 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
| 10431 | CORE_ADDR lowpc, highpc; |
| 10432 | struct compunit_symtab *cust; |
| 10433 | CORE_ADDR baseaddr; |
| 10434 | struct block *static_block; |
| 10435 | CORE_ADDR addr; |
| 10436 | |
| 10437 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
| 10438 | |
| 10439 | buildsym_init (); |
| 10440 | scoped_free_pendings free_pending; |
| 10441 | |
| 10442 | /* Clear the list here in case something was left over. */ |
| 10443 | cu->method_list.clear (); |
| 10444 | |
| 10445 | cu->list_in_scope = &file_symbols; |
| 10446 | |
| 10447 | cu->language = pretend_language; |
| 10448 | cu->language_defn = language_def (cu->language); |
| 10449 | |
| 10450 | /* Do line number decoding in read_file_scope () */ |
| 10451 | process_die (cu->dies, cu); |
| 10452 | |
| 10453 | /* For now fudge the Go package. */ |
| 10454 | if (cu->language == language_go) |
| 10455 | fixup_go_packaging (cu); |
| 10456 | |
| 10457 | /* Now that we have processed all the DIEs in the CU, all the types |
| 10458 | should be complete, and it should now be safe to compute all of the |
| 10459 | physnames. */ |
| 10460 | compute_delayed_physnames (cu); |
| 10461 | |
| 10462 | /* Some compilers don't define a DW_AT_high_pc attribute for the |
| 10463 | compilation unit. If the DW_AT_high_pc is missing, synthesize |
| 10464 | it, by scanning the DIE's below the compilation unit. */ |
| 10465 | get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu); |
| 10466 | |
| 10467 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); |
| 10468 | static_block = end_symtab_get_static_block (addr, 0, 1); |
| 10469 | |
| 10470 | /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges. |
| 10471 | Also, DW_AT_ranges may record ranges not belonging to any child DIEs |
| 10472 | (such as virtual method tables). Record the ranges in STATIC_BLOCK's |
| 10473 | addrmap to help ensure it has an accurate map of pc values belonging to |
| 10474 | this comp unit. */ |
| 10475 | dwarf2_record_block_ranges (cu->dies, static_block, baseaddr, cu); |
| 10476 | |
| 10477 | cust = end_symtab_from_static_block (static_block, |
| 10478 | SECT_OFF_TEXT (objfile), 0); |
| 10479 | |
| 10480 | if (cust != NULL) |
| 10481 | { |
| 10482 | int gcc_4_minor = producer_is_gcc_ge_4 (cu->producer); |
| 10483 | |
| 10484 | /* Set symtab language to language from DW_AT_language. If the |
| 10485 | compilation is from a C file generated by language preprocessors, do |
| 10486 | not set the language if it was already deduced by start_subfile. */ |
| 10487 | if (!(cu->language == language_c |
| 10488 | && COMPUNIT_FILETABS (cust)->language != language_unknown)) |
| 10489 | COMPUNIT_FILETABS (cust)->language = cu->language; |
| 10490 | |
| 10491 | /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can |
| 10492 | produce DW_AT_location with location lists but it can be possibly |
| 10493 | invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0 |
| 10494 | there were bugs in prologue debug info, fixed later in GCC-4.5 |
| 10495 | by "unwind info for epilogues" patch (which is not directly related). |
| 10496 | |
| 10497 | For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not |
| 10498 | needed, it would be wrong due to missing DW_AT_producer there. |
| 10499 | |
| 10500 | Still one can confuse GDB by using non-standard GCC compilation |
| 10501 | options - this waits on GCC PR other/32998 (-frecord-gcc-switches). |
| 10502 | */ |
| 10503 | if (cu->has_loclist && gcc_4_minor >= 5) |
| 10504 | cust->locations_valid = 1; |
| 10505 | |
| 10506 | if (gcc_4_minor >= 5) |
| 10507 | cust->epilogue_unwind_valid = 1; |
| 10508 | |
| 10509 | cust->call_site_htab = cu->call_site_htab; |
| 10510 | } |
| 10511 | |
| 10512 | if (dwarf2_per_objfile->using_index) |
| 10513 | per_cu->v.quick->compunit_symtab = cust; |
| 10514 | else |
| 10515 | { |
| 10516 | struct partial_symtab *pst = per_cu->v.psymtab; |
| 10517 | pst->compunit_symtab = cust; |
| 10518 | pst->readin = 1; |
| 10519 | } |
| 10520 | |
| 10521 | /* Push it for inclusion processing later. */ |
| 10522 | VEC_safe_push (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, per_cu); |
| 10523 | } |
| 10524 | |
| 10525 | /* Generate full symbol information for type unit PER_CU, whose DIEs have |
| 10526 | already been loaded into memory. */ |
| 10527 | |
| 10528 | static void |
| 10529 | process_full_type_unit (struct dwarf2_per_cu_data *per_cu, |
| 10530 | enum language pretend_language) |
| 10531 | { |
| 10532 | struct dwarf2_cu *cu = per_cu->cu; |
| 10533 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
| 10534 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 10535 | struct compunit_symtab *cust; |
| 10536 | struct signatured_type *sig_type; |
| 10537 | |
| 10538 | gdb_assert (per_cu->is_debug_types); |
| 10539 | sig_type = (struct signatured_type *) per_cu; |
| 10540 | |
| 10541 | buildsym_init (); |
| 10542 | scoped_free_pendings free_pending; |
| 10543 | |
| 10544 | /* Clear the list here in case something was left over. */ |
| 10545 | cu->method_list.clear (); |
| 10546 | |
| 10547 | cu->list_in_scope = &file_symbols; |
| 10548 | |
| 10549 | cu->language = pretend_language; |
| 10550 | cu->language_defn = language_def (cu->language); |
| 10551 | |
| 10552 | /* The symbol tables are set up in read_type_unit_scope. */ |
| 10553 | process_die (cu->dies, cu); |
| 10554 | |
| 10555 | /* For now fudge the Go package. */ |
| 10556 | if (cu->language == language_go) |
| 10557 | fixup_go_packaging (cu); |
| 10558 | |
| 10559 | /* Now that we have processed all the DIEs in the CU, all the types |
| 10560 | should be complete, and it should now be safe to compute all of the |
| 10561 | physnames. */ |
| 10562 | compute_delayed_physnames (cu); |
| 10563 | |
| 10564 | /* TUs share symbol tables. |
| 10565 | If this is the first TU to use this symtab, complete the construction |
| 10566 | of it with end_expandable_symtab. Otherwise, complete the addition of |
| 10567 | this TU's symbols to the existing symtab. */ |
| 10568 | if (sig_type->type_unit_group->compunit_symtab == NULL) |
| 10569 | { |
| 10570 | cust = end_expandable_symtab (0, SECT_OFF_TEXT (objfile)); |
| 10571 | sig_type->type_unit_group->compunit_symtab = cust; |
| 10572 | |
| 10573 | if (cust != NULL) |
| 10574 | { |
| 10575 | /* Set symtab language to language from DW_AT_language. If the |
| 10576 | compilation is from a C file generated by language preprocessors, |
| 10577 | do not set the language if it was already deduced by |
| 10578 | start_subfile. */ |
| 10579 | if (!(cu->language == language_c |
| 10580 | && COMPUNIT_FILETABS (cust)->language != language_c)) |
| 10581 | COMPUNIT_FILETABS (cust)->language = cu->language; |
| 10582 | } |
| 10583 | } |
| 10584 | else |
| 10585 | { |
| 10586 | augment_type_symtab (); |
| 10587 | cust = sig_type->type_unit_group->compunit_symtab; |
| 10588 | } |
| 10589 | |
| 10590 | if (dwarf2_per_objfile->using_index) |
| 10591 | per_cu->v.quick->compunit_symtab = cust; |
| 10592 | else |
| 10593 | { |
| 10594 | struct partial_symtab *pst = per_cu->v.psymtab; |
| 10595 | pst->compunit_symtab = cust; |
| 10596 | pst->readin = 1; |
| 10597 | } |
| 10598 | } |
| 10599 | |
| 10600 | /* Process an imported unit DIE. */ |
| 10601 | |
| 10602 | static void |
| 10603 | process_imported_unit_die (struct die_info *die, struct dwarf2_cu *cu) |
| 10604 | { |
| 10605 | struct attribute *attr; |
| 10606 | |
| 10607 | /* For now we don't handle imported units in type units. */ |
| 10608 | if (cu->per_cu->is_debug_types) |
| 10609 | { |
| 10610 | error (_("Dwarf Error: DW_TAG_imported_unit is not" |
| 10611 | " supported in type units [in module %s]"), |
| 10612 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
| 10613 | } |
| 10614 | |
| 10615 | attr = dwarf2_attr (die, DW_AT_import, cu); |
| 10616 | if (attr != NULL) |
| 10617 | { |
| 10618 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
| 10619 | bool is_dwz = (attr->form == DW_FORM_GNU_ref_alt || cu->per_cu->is_dwz); |
| 10620 | dwarf2_per_cu_data *per_cu |
| 10621 | = dwarf2_find_containing_comp_unit (sect_off, is_dwz, |
| 10622 | cu->per_cu->dwarf2_per_objfile); |
| 10623 | |
| 10624 | /* If necessary, add it to the queue and load its DIEs. */ |
| 10625 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
| 10626 | load_full_comp_unit (per_cu, cu->language); |
| 10627 | |
| 10628 | VEC_safe_push (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs, |
| 10629 | per_cu); |
| 10630 | } |
| 10631 | } |
| 10632 | |
| 10633 | /* RAII object that represents a process_die scope: i.e., |
| 10634 | starts/finishes processing a DIE. */ |
| 10635 | class process_die_scope |
| 10636 | { |
| 10637 | public: |
| 10638 | process_die_scope (die_info *die, dwarf2_cu *cu) |
| 10639 | : m_die (die), m_cu (cu) |
| 10640 | { |
| 10641 | /* We should only be processing DIEs not already in process. */ |
| 10642 | gdb_assert (!m_die->in_process); |
| 10643 | m_die->in_process = true; |
| 10644 | } |
| 10645 | |
| 10646 | ~process_die_scope () |
| 10647 | { |
| 10648 | m_die->in_process = false; |
| 10649 | |
| 10650 | /* If we're done processing the DIE for the CU that owns the line |
| 10651 | header, we don't need the line header anymore. */ |
| 10652 | if (m_cu->line_header_die_owner == m_die) |
| 10653 | { |
| 10654 | delete m_cu->line_header; |
| 10655 | m_cu->line_header = NULL; |
| 10656 | m_cu->line_header_die_owner = NULL; |
| 10657 | } |
| 10658 | } |
| 10659 | |
| 10660 | private: |
| 10661 | die_info *m_die; |
| 10662 | dwarf2_cu *m_cu; |
| 10663 | }; |
| 10664 | |
| 10665 | /* Process a die and its children. */ |
| 10666 | |
| 10667 | static void |
| 10668 | process_die (struct die_info *die, struct dwarf2_cu *cu) |
| 10669 | { |
| 10670 | process_die_scope scope (die, cu); |
| 10671 | |
| 10672 | switch (die->tag) |
| 10673 | { |
| 10674 | case DW_TAG_padding: |
| 10675 | break; |
| 10676 | case DW_TAG_compile_unit: |
| 10677 | case DW_TAG_partial_unit: |
| 10678 | read_file_scope (die, cu); |
| 10679 | break; |
| 10680 | case DW_TAG_type_unit: |
| 10681 | read_type_unit_scope (die, cu); |
| 10682 | break; |
| 10683 | case DW_TAG_subprogram: |
| 10684 | case DW_TAG_inlined_subroutine: |
| 10685 | read_func_scope (die, cu); |
| 10686 | break; |
| 10687 | case DW_TAG_lexical_block: |
| 10688 | case DW_TAG_try_block: |
| 10689 | case DW_TAG_catch_block: |
| 10690 | read_lexical_block_scope (die, cu); |
| 10691 | break; |
| 10692 | case DW_TAG_call_site: |
| 10693 | case DW_TAG_GNU_call_site: |
| 10694 | read_call_site_scope (die, cu); |
| 10695 | break; |
| 10696 | case DW_TAG_class_type: |
| 10697 | case DW_TAG_interface_type: |
| 10698 | case DW_TAG_structure_type: |
| 10699 | case DW_TAG_union_type: |
| 10700 | process_structure_scope (die, cu); |
| 10701 | break; |
| 10702 | case DW_TAG_enumeration_type: |
| 10703 | process_enumeration_scope (die, cu); |
| 10704 | break; |
| 10705 | |
| 10706 | /* These dies have a type, but processing them does not create |
| 10707 | a symbol or recurse to process the children. Therefore we can |
| 10708 | read them on-demand through read_type_die. */ |
| 10709 | case DW_TAG_subroutine_type: |
| 10710 | case DW_TAG_set_type: |
| 10711 | case DW_TAG_array_type: |
| 10712 | case DW_TAG_pointer_type: |
| 10713 | case DW_TAG_ptr_to_member_type: |
| 10714 | case DW_TAG_reference_type: |
| 10715 | case DW_TAG_rvalue_reference_type: |
| 10716 | case DW_TAG_string_type: |
| 10717 | break; |
| 10718 | |
| 10719 | case DW_TAG_base_type: |
| 10720 | case DW_TAG_subrange_type: |
| 10721 | case DW_TAG_typedef: |
| 10722 | /* Add a typedef symbol for the type definition, if it has a |
| 10723 | DW_AT_name. */ |
| 10724 | new_symbol (die, read_type_die (die, cu), cu); |
| 10725 | break; |
| 10726 | case DW_TAG_common_block: |
| 10727 | read_common_block (die, cu); |
| 10728 | break; |
| 10729 | case DW_TAG_common_inclusion: |
| 10730 | break; |
| 10731 | case DW_TAG_namespace: |
| 10732 | cu->processing_has_namespace_info = 1; |
| 10733 | read_namespace (die, cu); |
| 10734 | break; |
| 10735 | case DW_TAG_module: |
| 10736 | cu->processing_has_namespace_info = 1; |
| 10737 | read_module (die, cu); |
| 10738 | break; |
| 10739 | case DW_TAG_imported_declaration: |
| 10740 | cu->processing_has_namespace_info = 1; |
| 10741 | if (read_namespace_alias (die, cu)) |
| 10742 | break; |
| 10743 | /* The declaration is not a global namespace alias: fall through. */ |
| 10744 | case DW_TAG_imported_module: |
| 10745 | cu->processing_has_namespace_info = 1; |
| 10746 | if (die->child != NULL && (die->tag == DW_TAG_imported_declaration |
| 10747 | || cu->language != language_fortran)) |
| 10748 | complaint (&symfile_complaints, _("Tag '%s' has unexpected children"), |
| 10749 | dwarf_tag_name (die->tag)); |
| 10750 | read_import_statement (die, cu); |
| 10751 | break; |
| 10752 | |
| 10753 | case DW_TAG_imported_unit: |
| 10754 | process_imported_unit_die (die, cu); |
| 10755 | break; |
| 10756 | |
| 10757 | case DW_TAG_variable: |
| 10758 | read_variable (die, cu); |
| 10759 | break; |
| 10760 | |
| 10761 | default: |
| 10762 | new_symbol (die, NULL, cu); |
| 10763 | break; |
| 10764 | } |
| 10765 | } |
| 10766 | \f |
| 10767 | /* DWARF name computation. */ |
| 10768 | |
| 10769 | /* A helper function for dwarf2_compute_name which determines whether DIE |
| 10770 | needs to have the name of the scope prepended to the name listed in the |
| 10771 | die. */ |
| 10772 | |
| 10773 | static int |
| 10774 | die_needs_namespace (struct die_info *die, struct dwarf2_cu *cu) |
| 10775 | { |
| 10776 | struct attribute *attr; |
| 10777 | |
| 10778 | switch (die->tag) |
| 10779 | { |
| 10780 | case DW_TAG_namespace: |
| 10781 | case DW_TAG_typedef: |
| 10782 | case DW_TAG_class_type: |
| 10783 | case DW_TAG_interface_type: |
| 10784 | case DW_TAG_structure_type: |
| 10785 | case DW_TAG_union_type: |
| 10786 | case DW_TAG_enumeration_type: |
| 10787 | case DW_TAG_enumerator: |
| 10788 | case DW_TAG_subprogram: |
| 10789 | case DW_TAG_inlined_subroutine: |
| 10790 | case DW_TAG_member: |
| 10791 | case DW_TAG_imported_declaration: |
| 10792 | return 1; |
| 10793 | |
| 10794 | case DW_TAG_variable: |
| 10795 | case DW_TAG_constant: |
| 10796 | /* We only need to prefix "globally" visible variables. These include |
| 10797 | any variable marked with DW_AT_external or any variable that |
| 10798 | lives in a namespace. [Variables in anonymous namespaces |
| 10799 | require prefixing, but they are not DW_AT_external.] */ |
| 10800 | |
| 10801 | if (dwarf2_attr (die, DW_AT_specification, cu)) |
| 10802 | { |
| 10803 | struct dwarf2_cu *spec_cu = cu; |
| 10804 | |
| 10805 | return die_needs_namespace (die_specification (die, &spec_cu), |
| 10806 | spec_cu); |
| 10807 | } |
| 10808 | |
| 10809 | attr = dwarf2_attr (die, DW_AT_external, cu); |
| 10810 | if (attr == NULL && die->parent->tag != DW_TAG_namespace |
| 10811 | && die->parent->tag != DW_TAG_module) |
| 10812 | return 0; |
| 10813 | /* A variable in a lexical block of some kind does not need a |
| 10814 | namespace, even though in C++ such variables may be external |
| 10815 | and have a mangled name. */ |
| 10816 | if (die->parent->tag == DW_TAG_lexical_block |
| 10817 | || die->parent->tag == DW_TAG_try_block |
| 10818 | || die->parent->tag == DW_TAG_catch_block |
| 10819 | || die->parent->tag == DW_TAG_subprogram) |
| 10820 | return 0; |
| 10821 | return 1; |
| 10822 | |
| 10823 | default: |
| 10824 | return 0; |
| 10825 | } |
| 10826 | } |
| 10827 | |
| 10828 | /* Return the DIE's linkage name attribute, either DW_AT_linkage_name |
| 10829 | or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not |
| 10830 | defined for the given DIE. */ |
| 10831 | |
| 10832 | static struct attribute * |
| 10833 | dw2_linkage_name_attr (struct die_info *die, struct dwarf2_cu *cu) |
| 10834 | { |
| 10835 | struct attribute *attr; |
| 10836 | |
| 10837 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); |
| 10838 | if (attr == NULL) |
| 10839 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); |
| 10840 | |
| 10841 | return attr; |
| 10842 | } |
| 10843 | |
| 10844 | /* Return the DIE's linkage name as a string, either DW_AT_linkage_name |
| 10845 | or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not |
| 10846 | defined for the given DIE. */ |
| 10847 | |
| 10848 | static const char * |
| 10849 | dw2_linkage_name (struct die_info *die, struct dwarf2_cu *cu) |
| 10850 | { |
| 10851 | const char *linkage_name; |
| 10852 | |
| 10853 | linkage_name = dwarf2_string_attr (die, DW_AT_linkage_name, cu); |
| 10854 | if (linkage_name == NULL) |
| 10855 | linkage_name = dwarf2_string_attr (die, DW_AT_MIPS_linkage_name, cu); |
| 10856 | |
| 10857 | return linkage_name; |
| 10858 | } |
| 10859 | |
| 10860 | /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero, |
| 10861 | compute the physname for the object, which include a method's: |
| 10862 | - formal parameters (C++), |
| 10863 | - receiver type (Go), |
| 10864 | |
| 10865 | The term "physname" is a bit confusing. |
| 10866 | For C++, for example, it is the demangled name. |
| 10867 | For Go, for example, it's the mangled name. |
| 10868 | |
| 10869 | For Ada, return the DIE's linkage name rather than the fully qualified |
| 10870 | name. PHYSNAME is ignored.. |
| 10871 | |
| 10872 | The result is allocated on the objfile_obstack and canonicalized. */ |
| 10873 | |
| 10874 | static const char * |
| 10875 | dwarf2_compute_name (const char *name, |
| 10876 | struct die_info *die, struct dwarf2_cu *cu, |
| 10877 | int physname) |
| 10878 | { |
| 10879 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 10880 | |
| 10881 | if (name == NULL) |
| 10882 | name = dwarf2_name (die, cu); |
| 10883 | |
| 10884 | /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present |
| 10885 | but otherwise compute it by typename_concat inside GDB. |
| 10886 | FIXME: Actually this is not really true, or at least not always true. |
| 10887 | It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle |
| 10888 | Fortran names because there is no mangling standard. So new_symbol |
| 10889 | will set the demangled name to the result of dwarf2_full_name, and it is |
| 10890 | the demangled name that GDB uses if it exists. */ |
| 10891 | if (cu->language == language_ada |
| 10892 | || (cu->language == language_fortran && physname)) |
| 10893 | { |
| 10894 | /* For Ada unit, we prefer the linkage name over the name, as |
| 10895 | the former contains the exported name, which the user expects |
| 10896 | to be able to reference. Ideally, we want the user to be able |
| 10897 | to reference this entity using either natural or linkage name, |
| 10898 | but we haven't started looking at this enhancement yet. */ |
| 10899 | const char *linkage_name = dw2_linkage_name (die, cu); |
| 10900 | |
| 10901 | if (linkage_name != NULL) |
| 10902 | return linkage_name; |
| 10903 | } |
| 10904 | |
| 10905 | /* These are the only languages we know how to qualify names in. */ |
| 10906 | if (name != NULL |
| 10907 | && (cu->language == language_cplus |
| 10908 | || cu->language == language_fortran || cu->language == language_d |
| 10909 | || cu->language == language_rust)) |
| 10910 | { |
| 10911 | if (die_needs_namespace (die, cu)) |
| 10912 | { |
| 10913 | const char *prefix; |
| 10914 | const char *canonical_name = NULL; |
| 10915 | |
| 10916 | string_file buf; |
| 10917 | |
| 10918 | prefix = determine_prefix (die, cu); |
| 10919 | if (*prefix != '\0') |
| 10920 | { |
| 10921 | char *prefixed_name = typename_concat (NULL, prefix, name, |
| 10922 | physname, cu); |
| 10923 | |
| 10924 | buf.puts (prefixed_name); |
| 10925 | xfree (prefixed_name); |
| 10926 | } |
| 10927 | else |
| 10928 | buf.puts (name); |
| 10929 | |
| 10930 | /* Template parameters may be specified in the DIE's DW_AT_name, or |
| 10931 | as children with DW_TAG_template_type_param or |
| 10932 | DW_TAG_value_type_param. If the latter, add them to the name |
| 10933 | here. If the name already has template parameters, then |
| 10934 | skip this step; some versions of GCC emit both, and |
| 10935 | it is more efficient to use the pre-computed name. |
| 10936 | |
| 10937 | Something to keep in mind about this process: it is very |
| 10938 | unlikely, or in some cases downright impossible, to produce |
| 10939 | something that will match the mangled name of a function. |
| 10940 | If the definition of the function has the same debug info, |
| 10941 | we should be able to match up with it anyway. But fallbacks |
| 10942 | using the minimal symbol, for instance to find a method |
| 10943 | implemented in a stripped copy of libstdc++, will not work. |
| 10944 | If we do not have debug info for the definition, we will have to |
| 10945 | match them up some other way. |
| 10946 | |
| 10947 | When we do name matching there is a related problem with function |
| 10948 | templates; two instantiated function templates are allowed to |
| 10949 | differ only by their return types, which we do not add here. */ |
| 10950 | |
| 10951 | if (cu->language == language_cplus && strchr (name, '<') == NULL) |
| 10952 | { |
| 10953 | struct attribute *attr; |
| 10954 | struct die_info *child; |
| 10955 | int first = 1; |
| 10956 | |
| 10957 | die->building_fullname = 1; |
| 10958 | |
| 10959 | for (child = die->child; child != NULL; child = child->sibling) |
| 10960 | { |
| 10961 | struct type *type; |
| 10962 | LONGEST value; |
| 10963 | const gdb_byte *bytes; |
| 10964 | struct dwarf2_locexpr_baton *baton; |
| 10965 | struct value *v; |
| 10966 | |
| 10967 | if (child->tag != DW_TAG_template_type_param |
| 10968 | && child->tag != DW_TAG_template_value_param) |
| 10969 | continue; |
| 10970 | |
| 10971 | if (first) |
| 10972 | { |
| 10973 | buf.puts ("<"); |
| 10974 | first = 0; |
| 10975 | } |
| 10976 | else |
| 10977 | buf.puts (", "); |
| 10978 | |
| 10979 | attr = dwarf2_attr (child, DW_AT_type, cu); |
| 10980 | if (attr == NULL) |
| 10981 | { |
| 10982 | complaint (&symfile_complaints, |
| 10983 | _("template parameter missing DW_AT_type")); |
| 10984 | buf.puts ("UNKNOWN_TYPE"); |
| 10985 | continue; |
| 10986 | } |
| 10987 | type = die_type (child, cu); |
| 10988 | |
| 10989 | if (child->tag == DW_TAG_template_type_param) |
| 10990 | { |
| 10991 | c_print_type (type, "", &buf, -1, 0, &type_print_raw_options); |
| 10992 | continue; |
| 10993 | } |
| 10994 | |
| 10995 | attr = dwarf2_attr (child, DW_AT_const_value, cu); |
| 10996 | if (attr == NULL) |
| 10997 | { |
| 10998 | complaint (&symfile_complaints, |
| 10999 | _("template parameter missing " |
| 11000 | "DW_AT_const_value")); |
| 11001 | buf.puts ("UNKNOWN_VALUE"); |
| 11002 | continue; |
| 11003 | } |
| 11004 | |
| 11005 | dwarf2_const_value_attr (attr, type, name, |
| 11006 | &cu->comp_unit_obstack, cu, |
| 11007 | &value, &bytes, &baton); |
| 11008 | |
| 11009 | if (TYPE_NOSIGN (type)) |
| 11010 | /* GDB prints characters as NUMBER 'CHAR'. If that's |
| 11011 | changed, this can use value_print instead. */ |
| 11012 | c_printchar (value, type, &buf); |
| 11013 | else |
| 11014 | { |
| 11015 | struct value_print_options opts; |
| 11016 | |
| 11017 | if (baton != NULL) |
| 11018 | v = dwarf2_evaluate_loc_desc (type, NULL, |
| 11019 | baton->data, |
| 11020 | baton->size, |
| 11021 | baton->per_cu); |
| 11022 | else if (bytes != NULL) |
| 11023 | { |
| 11024 | v = allocate_value (type); |
| 11025 | memcpy (value_contents_writeable (v), bytes, |
| 11026 | TYPE_LENGTH (type)); |
| 11027 | } |
| 11028 | else |
| 11029 | v = value_from_longest (type, value); |
| 11030 | |
| 11031 | /* Specify decimal so that we do not depend on |
| 11032 | the radix. */ |
| 11033 | get_formatted_print_options (&opts, 'd'); |
| 11034 | opts.raw = 1; |
| 11035 | value_print (v, &buf, &opts); |
| 11036 | release_value (v); |
| 11037 | value_free (v); |
| 11038 | } |
| 11039 | } |
| 11040 | |
| 11041 | die->building_fullname = 0; |
| 11042 | |
| 11043 | if (!first) |
| 11044 | { |
| 11045 | /* Close the argument list, with a space if necessary |
| 11046 | (nested templates). */ |
| 11047 | if (!buf.empty () && buf.string ().back () == '>') |
| 11048 | buf.puts (" >"); |
| 11049 | else |
| 11050 | buf.puts (">"); |
| 11051 | } |
| 11052 | } |
| 11053 | |
| 11054 | /* For C++ methods, append formal parameter type |
| 11055 | information, if PHYSNAME. */ |
| 11056 | |
| 11057 | if (physname && die->tag == DW_TAG_subprogram |
| 11058 | && cu->language == language_cplus) |
| 11059 | { |
| 11060 | struct type *type = read_type_die (die, cu); |
| 11061 | |
| 11062 | c_type_print_args (type, &buf, 1, cu->language, |
| 11063 | &type_print_raw_options); |
| 11064 | |
| 11065 | if (cu->language == language_cplus) |
| 11066 | { |
| 11067 | /* Assume that an artificial first parameter is |
| 11068 | "this", but do not crash if it is not. RealView |
| 11069 | marks unnamed (and thus unused) parameters as |
| 11070 | artificial; there is no way to differentiate |
| 11071 | the two cases. */ |
| 11072 | if (TYPE_NFIELDS (type) > 0 |
| 11073 | && TYPE_FIELD_ARTIFICIAL (type, 0) |
| 11074 | && TYPE_CODE (TYPE_FIELD_TYPE (type, 0)) == TYPE_CODE_PTR |
| 11075 | && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, |
| 11076 | 0)))) |
| 11077 | buf.puts (" const"); |
| 11078 | } |
| 11079 | } |
| 11080 | |
| 11081 | const std::string &intermediate_name = buf.string (); |
| 11082 | |
| 11083 | if (cu->language == language_cplus) |
| 11084 | canonical_name |
| 11085 | = dwarf2_canonicalize_name (intermediate_name.c_str (), cu, |
| 11086 | &objfile->per_bfd->storage_obstack); |
| 11087 | |
| 11088 | /* If we only computed INTERMEDIATE_NAME, or if |
| 11089 | INTERMEDIATE_NAME is already canonical, then we need to |
| 11090 | copy it to the appropriate obstack. */ |
| 11091 | if (canonical_name == NULL || canonical_name == intermediate_name.c_str ()) |
| 11092 | name = ((const char *) |
| 11093 | obstack_copy0 (&objfile->per_bfd->storage_obstack, |
| 11094 | intermediate_name.c_str (), |
| 11095 | intermediate_name.length ())); |
| 11096 | else |
| 11097 | name = canonical_name; |
| 11098 | } |
| 11099 | } |
| 11100 | |
| 11101 | return name; |
| 11102 | } |
| 11103 | |
| 11104 | /* Return the fully qualified name of DIE, based on its DW_AT_name. |
| 11105 | If scope qualifiers are appropriate they will be added. The result |
| 11106 | will be allocated on the storage_obstack, or NULL if the DIE does |
| 11107 | not have a name. NAME may either be from a previous call to |
| 11108 | dwarf2_name or NULL. |
| 11109 | |
| 11110 | The output string will be canonicalized (if C++). */ |
| 11111 | |
| 11112 | static const char * |
| 11113 | dwarf2_full_name (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
| 11114 | { |
| 11115 | return dwarf2_compute_name (name, die, cu, 0); |
| 11116 | } |
| 11117 | |
| 11118 | /* Construct a physname for the given DIE in CU. NAME may either be |
| 11119 | from a previous call to dwarf2_name or NULL. The result will be |
| 11120 | allocated on the objfile_objstack or NULL if the DIE does not have a |
| 11121 | name. |
| 11122 | |
| 11123 | The output string will be canonicalized (if C++). */ |
| 11124 | |
| 11125 | static const char * |
| 11126 | dwarf2_physname (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
| 11127 | { |
| 11128 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 11129 | const char *retval, *mangled = NULL, *canon = NULL; |
| 11130 | int need_copy = 1; |
| 11131 | |
| 11132 | /* In this case dwarf2_compute_name is just a shortcut not building anything |
| 11133 | on its own. */ |
| 11134 | if (!die_needs_namespace (die, cu)) |
| 11135 | return dwarf2_compute_name (name, die, cu, 1); |
| 11136 | |
| 11137 | mangled = dw2_linkage_name (die, cu); |
| 11138 | |
| 11139 | /* rustc emits invalid values for DW_AT_linkage_name. Ignore these. |
| 11140 | See https://github.com/rust-lang/rust/issues/32925. */ |
| 11141 | if (cu->language == language_rust && mangled != NULL |
| 11142 | && strchr (mangled, '{') != NULL) |
| 11143 | mangled = NULL; |
| 11144 | |
| 11145 | /* DW_AT_linkage_name is missing in some cases - depend on what GDB |
| 11146 | has computed. */ |
| 11147 | gdb::unique_xmalloc_ptr<char> demangled; |
| 11148 | if (mangled != NULL) |
| 11149 | { |
| 11150 | |
| 11151 | if (cu->language == language_go) |
| 11152 | { |
| 11153 | /* This is a lie, but we already lie to the caller new_symbol. |
| 11154 | new_symbol assumes we return the mangled name. |
| 11155 | This just undoes that lie until things are cleaned up. */ |
| 11156 | } |
| 11157 | else |
| 11158 | { |
| 11159 | /* Use DMGL_RET_DROP for C++ template functions to suppress |
| 11160 | their return type. It is easier for GDB users to search |
| 11161 | for such functions as `name(params)' than `long name(params)'. |
| 11162 | In such case the minimal symbol names do not match the full |
| 11163 | symbol names but for template functions there is never a need |
| 11164 | to look up their definition from their declaration so |
| 11165 | the only disadvantage remains the minimal symbol variant |
| 11166 | `long name(params)' does not have the proper inferior type. */ |
| 11167 | demangled.reset (gdb_demangle (mangled, |
| 11168 | (DMGL_PARAMS | DMGL_ANSI |
| 11169 | | DMGL_RET_DROP))); |
| 11170 | } |
| 11171 | if (demangled) |
| 11172 | canon = demangled.get (); |
| 11173 | else |
| 11174 | { |
| 11175 | canon = mangled; |
| 11176 | need_copy = 0; |
| 11177 | } |
| 11178 | } |
| 11179 | |
| 11180 | if (canon == NULL || check_physname) |
| 11181 | { |
| 11182 | const char *physname = dwarf2_compute_name (name, die, cu, 1); |
| 11183 | |
| 11184 | if (canon != NULL && strcmp (physname, canon) != 0) |
| 11185 | { |
| 11186 | /* It may not mean a bug in GDB. The compiler could also |
| 11187 | compute DW_AT_linkage_name incorrectly. But in such case |
| 11188 | GDB would need to be bug-to-bug compatible. */ |
| 11189 | |
| 11190 | complaint (&symfile_complaints, |
| 11191 | _("Computed physname <%s> does not match demangled <%s> " |
| 11192 | "(from linkage <%s>) - DIE at 0x%x [in module %s]"), |
| 11193 | physname, canon, mangled, to_underlying (die->sect_off), |
| 11194 | objfile_name (objfile)); |
| 11195 | |
| 11196 | /* Prefer DW_AT_linkage_name (in the CANON form) - when it |
| 11197 | is available here - over computed PHYSNAME. It is safer |
| 11198 | against both buggy GDB and buggy compilers. */ |
| 11199 | |
| 11200 | retval = canon; |
| 11201 | } |
| 11202 | else |
| 11203 | { |
| 11204 | retval = physname; |
| 11205 | need_copy = 0; |
| 11206 | } |
| 11207 | } |
| 11208 | else |
| 11209 | retval = canon; |
| 11210 | |
| 11211 | if (need_copy) |
| 11212 | retval = ((const char *) |
| 11213 | obstack_copy0 (&objfile->per_bfd->storage_obstack, |
| 11214 | retval, strlen (retval))); |
| 11215 | |
| 11216 | return retval; |
| 11217 | } |
| 11218 | |
| 11219 | /* Inspect DIE in CU for a namespace alias. If one exists, record |
| 11220 | a new symbol for it. |
| 11221 | |
| 11222 | Returns 1 if a namespace alias was recorded, 0 otherwise. */ |
| 11223 | |
| 11224 | static int |
| 11225 | read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu) |
| 11226 | { |
| 11227 | struct attribute *attr; |
| 11228 | |
| 11229 | /* If the die does not have a name, this is not a namespace |
| 11230 | alias. */ |
| 11231 | attr = dwarf2_attr (die, DW_AT_name, cu); |
| 11232 | if (attr != NULL) |
| 11233 | { |
| 11234 | int num; |
| 11235 | struct die_info *d = die; |
| 11236 | struct dwarf2_cu *imported_cu = cu; |
| 11237 | |
| 11238 | /* If the compiler has nested DW_AT_imported_declaration DIEs, |
| 11239 | keep inspecting DIEs until we hit the underlying import. */ |
| 11240 | #define MAX_NESTED_IMPORTED_DECLARATIONS 100 |
| 11241 | for (num = 0; num < MAX_NESTED_IMPORTED_DECLARATIONS; ++num) |
| 11242 | { |
| 11243 | attr = dwarf2_attr (d, DW_AT_import, cu); |
| 11244 | if (attr == NULL) |
| 11245 | break; |
| 11246 | |
| 11247 | d = follow_die_ref (d, attr, &imported_cu); |
| 11248 | if (d->tag != DW_TAG_imported_declaration) |
| 11249 | break; |
| 11250 | } |
| 11251 | |
| 11252 | if (num == MAX_NESTED_IMPORTED_DECLARATIONS) |
| 11253 | { |
| 11254 | complaint (&symfile_complaints, |
| 11255 | _("DIE at 0x%x has too many recursively imported " |
| 11256 | "declarations"), to_underlying (d->sect_off)); |
| 11257 | return 0; |
| 11258 | } |
| 11259 | |
| 11260 | if (attr != NULL) |
| 11261 | { |
| 11262 | struct type *type; |
| 11263 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
| 11264 | |
| 11265 | type = get_die_type_at_offset (sect_off, cu->per_cu); |
| 11266 | if (type != NULL && TYPE_CODE (type) == TYPE_CODE_NAMESPACE) |
| 11267 | { |
| 11268 | /* This declaration is a global namespace alias. Add |
| 11269 | a symbol for it whose type is the aliased namespace. */ |
| 11270 | new_symbol (die, type, cu); |
| 11271 | return 1; |
| 11272 | } |
| 11273 | } |
| 11274 | } |
| 11275 | |
| 11276 | return 0; |
| 11277 | } |
| 11278 | |
| 11279 | /* Return the using directives repository (global or local?) to use in the |
| 11280 | current context for LANGUAGE. |
| 11281 | |
| 11282 | For Ada, imported declarations can materialize renamings, which *may* be |
| 11283 | global. However it is impossible (for now?) in DWARF to distinguish |
| 11284 | "external" imported declarations and "static" ones. As all imported |
| 11285 | declarations seem to be static in all other languages, make them all CU-wide |
| 11286 | global only in Ada. */ |
| 11287 | |
| 11288 | static struct using_direct ** |
| 11289 | using_directives (enum language language) |
| 11290 | { |
| 11291 | if (language == language_ada && context_stack_depth == 0) |
| 11292 | return &global_using_directives; |
| 11293 | else |
| 11294 | return &local_using_directives; |
| 11295 | } |
| 11296 | |
| 11297 | /* Read the import statement specified by the given die and record it. */ |
| 11298 | |
| 11299 | static void |
| 11300 | read_import_statement (struct die_info *die, struct dwarf2_cu *cu) |
| 11301 | { |
| 11302 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 11303 | struct attribute *import_attr; |
| 11304 | struct die_info *imported_die, *child_die; |
| 11305 | struct dwarf2_cu *imported_cu; |
| 11306 | const char *imported_name; |
| 11307 | const char *imported_name_prefix; |
| 11308 | const char *canonical_name; |
| 11309 | const char *import_alias; |
| 11310 | const char *imported_declaration = NULL; |
| 11311 | const char *import_prefix; |
| 11312 | std::vector<const char *> excludes; |
| 11313 | |
| 11314 | import_attr = dwarf2_attr (die, DW_AT_import, cu); |
| 11315 | if (import_attr == NULL) |
| 11316 | { |
| 11317 | complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"), |
| 11318 | dwarf_tag_name (die->tag)); |
| 11319 | return; |
| 11320 | } |
| 11321 | |
| 11322 | imported_cu = cu; |
| 11323 | imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu); |
| 11324 | imported_name = dwarf2_name (imported_die, imported_cu); |
| 11325 | if (imported_name == NULL) |
| 11326 | { |
| 11327 | /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524 |
| 11328 | |
| 11329 | The import in the following code: |
| 11330 | namespace A |
| 11331 | { |
| 11332 | typedef int B; |
| 11333 | } |
| 11334 | |
| 11335 | int main () |
| 11336 | { |
| 11337 | using A::B; |
| 11338 | B b; |
| 11339 | return b; |
| 11340 | } |
| 11341 | |
| 11342 | ... |
| 11343 | <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration) |
| 11344 | <52> DW_AT_decl_file : 1 |
| 11345 | <53> DW_AT_decl_line : 6 |
| 11346 | <54> DW_AT_import : <0x75> |
| 11347 | <2><58>: Abbrev Number: 4 (DW_TAG_typedef) |
| 11348 | <59> DW_AT_name : B |
| 11349 | <5b> DW_AT_decl_file : 1 |
| 11350 | <5c> DW_AT_decl_line : 2 |
| 11351 | <5d> DW_AT_type : <0x6e> |
| 11352 | ... |
| 11353 | <1><75>: Abbrev Number: 7 (DW_TAG_base_type) |
| 11354 | <76> DW_AT_byte_size : 4 |
| 11355 | <77> DW_AT_encoding : 5 (signed) |
| 11356 | |
| 11357 | imports the wrong die ( 0x75 instead of 0x58 ). |
| 11358 | This case will be ignored until the gcc bug is fixed. */ |
| 11359 | return; |
| 11360 | } |
| 11361 | |
| 11362 | /* Figure out the local name after import. */ |
| 11363 | import_alias = dwarf2_name (die, cu); |
| 11364 | |
| 11365 | /* Figure out where the statement is being imported to. */ |
| 11366 | import_prefix = determine_prefix (die, cu); |
| 11367 | |
| 11368 | /* Figure out what the scope of the imported die is and prepend it |
| 11369 | to the name of the imported die. */ |
| 11370 | imported_name_prefix = determine_prefix (imported_die, imported_cu); |
| 11371 | |
| 11372 | if (imported_die->tag != DW_TAG_namespace |
| 11373 | && imported_die->tag != DW_TAG_module) |
| 11374 | { |
| 11375 | imported_declaration = imported_name; |
| 11376 | canonical_name = imported_name_prefix; |
| 11377 | } |
| 11378 | else if (strlen (imported_name_prefix) > 0) |
| 11379 | canonical_name = obconcat (&objfile->objfile_obstack, |
| 11380 | imported_name_prefix, |
| 11381 | (cu->language == language_d ? "." : "::"), |
| 11382 | imported_name, (char *) NULL); |
| 11383 | else |
| 11384 | canonical_name = imported_name; |
| 11385 | |
| 11386 | if (die->tag == DW_TAG_imported_module && cu->language == language_fortran) |
| 11387 | for (child_die = die->child; child_die && child_die->tag; |
| 11388 | child_die = sibling_die (child_die)) |
| 11389 | { |
| 11390 | /* DWARF-4: A Fortran use statement with a “rename list” may be |
| 11391 | represented by an imported module entry with an import attribute |
| 11392 | referring to the module and owned entries corresponding to those |
| 11393 | entities that are renamed as part of being imported. */ |
| 11394 | |
| 11395 | if (child_die->tag != DW_TAG_imported_declaration) |
| 11396 | { |
| 11397 | complaint (&symfile_complaints, |
| 11398 | _("child DW_TAG_imported_declaration expected " |
| 11399 | "- DIE at 0x%x [in module %s]"), |
| 11400 | to_underlying (child_die->sect_off), objfile_name (objfile)); |
| 11401 | continue; |
| 11402 | } |
| 11403 | |
| 11404 | import_attr = dwarf2_attr (child_die, DW_AT_import, cu); |
| 11405 | if (import_attr == NULL) |
| 11406 | { |
| 11407 | complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"), |
| 11408 | dwarf_tag_name (child_die->tag)); |
| 11409 | continue; |
| 11410 | } |
| 11411 | |
| 11412 | imported_cu = cu; |
| 11413 | imported_die = follow_die_ref_or_sig (child_die, import_attr, |
| 11414 | &imported_cu); |
| 11415 | imported_name = dwarf2_name (imported_die, imported_cu); |
| 11416 | if (imported_name == NULL) |
| 11417 | { |
| 11418 | complaint (&symfile_complaints, |
| 11419 | _("child DW_TAG_imported_declaration has unknown " |
| 11420 | "imported name - DIE at 0x%x [in module %s]"), |
| 11421 | to_underlying (child_die->sect_off), objfile_name (objfile)); |
| 11422 | continue; |
| 11423 | } |
| 11424 | |
| 11425 | excludes.push_back (imported_name); |
| 11426 | |
| 11427 | process_die (child_die, cu); |
| 11428 | } |
| 11429 | |
| 11430 | add_using_directive (using_directives (cu->language), |
| 11431 | import_prefix, |
| 11432 | canonical_name, |
| 11433 | import_alias, |
| 11434 | imported_declaration, |
| 11435 | excludes, |
| 11436 | 0, |
| 11437 | &objfile->objfile_obstack); |
| 11438 | } |
| 11439 | |
| 11440 | /* ICC<14 does not output the required DW_AT_declaration on incomplete |
| 11441 | types, but gives them a size of zero. Starting with version 14, |
| 11442 | ICC is compatible with GCC. */ |
| 11443 | |
| 11444 | static int |
| 11445 | producer_is_icc_lt_14 (struct dwarf2_cu *cu) |
| 11446 | { |
| 11447 | if (!cu->checked_producer) |
| 11448 | check_producer (cu); |
| 11449 | |
| 11450 | return cu->producer_is_icc_lt_14; |
| 11451 | } |
| 11452 | |
| 11453 | /* Check for possibly missing DW_AT_comp_dir with relative .debug_line |
| 11454 | directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed |
| 11455 | this, it was first present in GCC release 4.3.0. */ |
| 11456 | |
| 11457 | static int |
| 11458 | producer_is_gcc_lt_4_3 (struct dwarf2_cu *cu) |
| 11459 | { |
| 11460 | if (!cu->checked_producer) |
| 11461 | check_producer (cu); |
| 11462 | |
| 11463 | return cu->producer_is_gcc_lt_4_3; |
| 11464 | } |
| 11465 | |
| 11466 | static file_and_directory |
| 11467 | find_file_and_directory (struct die_info *die, struct dwarf2_cu *cu) |
| 11468 | { |
| 11469 | file_and_directory res; |
| 11470 | |
| 11471 | /* Find the filename. Do not use dwarf2_name here, since the filename |
| 11472 | is not a source language identifier. */ |
| 11473 | res.name = dwarf2_string_attr (die, DW_AT_name, cu); |
| 11474 | res.comp_dir = dwarf2_string_attr (die, DW_AT_comp_dir, cu); |
| 11475 | |
| 11476 | if (res.comp_dir == NULL |
| 11477 | && producer_is_gcc_lt_4_3 (cu) && res.name != NULL |
| 11478 | && IS_ABSOLUTE_PATH (res.name)) |
| 11479 | { |
| 11480 | res.comp_dir_storage = ldirname (res.name); |
| 11481 | if (!res.comp_dir_storage.empty ()) |
| 11482 | res.comp_dir = res.comp_dir_storage.c_str (); |
| 11483 | } |
| 11484 | if (res.comp_dir != NULL) |
| 11485 | { |
| 11486 | /* Irix 6.2 native cc prepends <machine>.: to the compilation |
| 11487 | directory, get rid of it. */ |
| 11488 | const char *cp = strchr (res.comp_dir, ':'); |
| 11489 | |
| 11490 | if (cp && cp != res.comp_dir && cp[-1] == '.' && cp[1] == '/') |
| 11491 | res.comp_dir = cp + 1; |
| 11492 | } |
| 11493 | |
| 11494 | if (res.name == NULL) |
| 11495 | res.name = "<unknown>"; |
| 11496 | |
| 11497 | return res; |
| 11498 | } |
| 11499 | |
| 11500 | /* Handle DW_AT_stmt_list for a compilation unit. |
| 11501 | DIE is the DW_TAG_compile_unit die for CU. |
| 11502 | COMP_DIR is the compilation directory. LOWPC is passed to |
| 11503 | dwarf_decode_lines. See dwarf_decode_lines comments about it. */ |
| 11504 | |
| 11505 | static void |
| 11506 | handle_DW_AT_stmt_list (struct die_info *die, struct dwarf2_cu *cu, |
| 11507 | const char *comp_dir, CORE_ADDR lowpc) /* ARI: editCase function */ |
| 11508 | { |
| 11509 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 11510 | = cu->per_cu->dwarf2_per_objfile; |
| 11511 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 11512 | struct attribute *attr; |
| 11513 | struct line_header line_header_local; |
| 11514 | hashval_t line_header_local_hash; |
| 11515 | void **slot; |
| 11516 | int decode_mapping; |
| 11517 | |
| 11518 | gdb_assert (! cu->per_cu->is_debug_types); |
| 11519 | |
| 11520 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
| 11521 | if (attr == NULL) |
| 11522 | return; |
| 11523 | |
| 11524 | sect_offset line_offset = (sect_offset) DW_UNSND (attr); |
| 11525 | |
| 11526 | /* The line header hash table is only created if needed (it exists to |
| 11527 | prevent redundant reading of the line table for partial_units). |
| 11528 | If we're given a partial_unit, we'll need it. If we're given a |
| 11529 | compile_unit, then use the line header hash table if it's already |
| 11530 | created, but don't create one just yet. */ |
| 11531 | |
| 11532 | if (dwarf2_per_objfile->line_header_hash == NULL |
| 11533 | && die->tag == DW_TAG_partial_unit) |
| 11534 | { |
| 11535 | dwarf2_per_objfile->line_header_hash |
| 11536 | = htab_create_alloc_ex (127, line_header_hash_voidp, |
| 11537 | line_header_eq_voidp, |
| 11538 | free_line_header_voidp, |
| 11539 | &objfile->objfile_obstack, |
| 11540 | hashtab_obstack_allocate, |
| 11541 | dummy_obstack_deallocate); |
| 11542 | } |
| 11543 | |
| 11544 | line_header_local.sect_off = line_offset; |
| 11545 | line_header_local.offset_in_dwz = cu->per_cu->is_dwz; |
| 11546 | line_header_local_hash = line_header_hash (&line_header_local); |
| 11547 | if (dwarf2_per_objfile->line_header_hash != NULL) |
| 11548 | { |
| 11549 | slot = htab_find_slot_with_hash (dwarf2_per_objfile->line_header_hash, |
| 11550 | &line_header_local, |
| 11551 | line_header_local_hash, NO_INSERT); |
| 11552 | |
| 11553 | /* For DW_TAG_compile_unit we need info like symtab::linetable which |
| 11554 | is not present in *SLOT (since if there is something in *SLOT then |
| 11555 | it will be for a partial_unit). */ |
| 11556 | if (die->tag == DW_TAG_partial_unit && slot != NULL) |
| 11557 | { |
| 11558 | gdb_assert (*slot != NULL); |
| 11559 | cu->line_header = (struct line_header *) *slot; |
| 11560 | return; |
| 11561 | } |
| 11562 | } |
| 11563 | |
| 11564 | /* dwarf_decode_line_header does not yet provide sufficient information. |
| 11565 | We always have to call also dwarf_decode_lines for it. */ |
| 11566 | line_header_up lh = dwarf_decode_line_header (line_offset, cu); |
| 11567 | if (lh == NULL) |
| 11568 | return; |
| 11569 | |
| 11570 | cu->line_header = lh.release (); |
| 11571 | cu->line_header_die_owner = die; |
| 11572 | |
| 11573 | if (dwarf2_per_objfile->line_header_hash == NULL) |
| 11574 | slot = NULL; |
| 11575 | else |
| 11576 | { |
| 11577 | slot = htab_find_slot_with_hash (dwarf2_per_objfile->line_header_hash, |
| 11578 | &line_header_local, |
| 11579 | line_header_local_hash, INSERT); |
| 11580 | gdb_assert (slot != NULL); |
| 11581 | } |
| 11582 | if (slot != NULL && *slot == NULL) |
| 11583 | { |
| 11584 | /* This newly decoded line number information unit will be owned |
| 11585 | by line_header_hash hash table. */ |
| 11586 | *slot = cu->line_header; |
| 11587 | cu->line_header_die_owner = NULL; |
| 11588 | } |
| 11589 | else |
| 11590 | { |
| 11591 | /* We cannot free any current entry in (*slot) as that struct line_header |
| 11592 | may be already used by multiple CUs. Create only temporary decoded |
| 11593 | line_header for this CU - it may happen at most once for each line |
| 11594 | number information unit. And if we're not using line_header_hash |
| 11595 | then this is what we want as well. */ |
| 11596 | gdb_assert (die->tag != DW_TAG_partial_unit); |
| 11597 | } |
| 11598 | decode_mapping = (die->tag != DW_TAG_partial_unit); |
| 11599 | dwarf_decode_lines (cu->line_header, comp_dir, cu, NULL, lowpc, |
| 11600 | decode_mapping); |
| 11601 | |
| 11602 | } |
| 11603 | |
| 11604 | /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */ |
| 11605 | |
| 11606 | static void |
| 11607 | read_file_scope (struct die_info *die, struct dwarf2_cu *cu) |
| 11608 | { |
| 11609 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 11610 | = cu->per_cu->dwarf2_per_objfile; |
| 11611 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 11612 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
| 11613 | CORE_ADDR lowpc = ((CORE_ADDR) -1); |
| 11614 | CORE_ADDR highpc = ((CORE_ADDR) 0); |
| 11615 | struct attribute *attr; |
| 11616 | struct die_info *child_die; |
| 11617 | CORE_ADDR baseaddr; |
| 11618 | |
| 11619 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
| 11620 | |
| 11621 | get_scope_pc_bounds (die, &lowpc, &highpc, cu); |
| 11622 | |
| 11623 | /* If we didn't find a lowpc, set it to highpc to avoid complaints |
| 11624 | from finish_block. */ |
| 11625 | if (lowpc == ((CORE_ADDR) -1)) |
| 11626 | lowpc = highpc; |
| 11627 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
| 11628 | |
| 11629 | file_and_directory fnd = find_file_and_directory (die, cu); |
| 11630 | |
| 11631 | prepare_one_comp_unit (cu, die, cu->language); |
| 11632 | |
| 11633 | /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not |
| 11634 | standardised yet. As a workaround for the language detection we fall |
| 11635 | back to the DW_AT_producer string. */ |
| 11636 | if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL") != NULL) |
| 11637 | cu->language = language_opencl; |
| 11638 | |
| 11639 | /* Similar hack for Go. */ |
| 11640 | if (cu->producer && strstr (cu->producer, "GNU Go ") != NULL) |
| 11641 | set_cu_language (DW_LANG_Go, cu); |
| 11642 | |
| 11643 | dwarf2_start_symtab (cu, fnd.name, fnd.comp_dir, lowpc); |
| 11644 | |
| 11645 | /* Decode line number information if present. We do this before |
| 11646 | processing child DIEs, so that the line header table is available |
| 11647 | for DW_AT_decl_file. */ |
| 11648 | handle_DW_AT_stmt_list (die, cu, fnd.comp_dir, lowpc); |
| 11649 | |
| 11650 | /* Process all dies in compilation unit. */ |
| 11651 | if (die->child != NULL) |
| 11652 | { |
| 11653 | child_die = die->child; |
| 11654 | while (child_die && child_die->tag) |
| 11655 | { |
| 11656 | process_die (child_die, cu); |
| 11657 | child_die = sibling_die (child_die); |
| 11658 | } |
| 11659 | } |
| 11660 | |
| 11661 | /* Decode macro information, if present. Dwarf 2 macro information |
| 11662 | refers to information in the line number info statement program |
| 11663 | header, so we can only read it if we've read the header |
| 11664 | successfully. */ |
| 11665 | attr = dwarf2_attr (die, DW_AT_macros, cu); |
| 11666 | if (attr == NULL) |
| 11667 | attr = dwarf2_attr (die, DW_AT_GNU_macros, cu); |
| 11668 | if (attr && cu->line_header) |
| 11669 | { |
| 11670 | if (dwarf2_attr (die, DW_AT_macro_info, cu)) |
| 11671 | complaint (&symfile_complaints, |
| 11672 | _("CU refers to both DW_AT_macros and DW_AT_macro_info")); |
| 11673 | |
| 11674 | dwarf_decode_macros (cu, DW_UNSND (attr), 1); |
| 11675 | } |
| 11676 | else |
| 11677 | { |
| 11678 | attr = dwarf2_attr (die, DW_AT_macro_info, cu); |
| 11679 | if (attr && cu->line_header) |
| 11680 | { |
| 11681 | unsigned int macro_offset = DW_UNSND (attr); |
| 11682 | |
| 11683 | dwarf_decode_macros (cu, macro_offset, 0); |
| 11684 | } |
| 11685 | } |
| 11686 | } |
| 11687 | |
| 11688 | /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope. |
| 11689 | Create the set of symtabs used by this TU, or if this TU is sharing |
| 11690 | symtabs with another TU and the symtabs have already been created |
| 11691 | then restore those symtabs in the line header. |
| 11692 | We don't need the pc/line-number mapping for type units. */ |
| 11693 | |
| 11694 | static void |
| 11695 | setup_type_unit_groups (struct die_info *die, struct dwarf2_cu *cu) |
| 11696 | { |
| 11697 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; |
| 11698 | struct type_unit_group *tu_group; |
| 11699 | int first_time; |
| 11700 | struct attribute *attr; |
| 11701 | unsigned int i; |
| 11702 | struct signatured_type *sig_type; |
| 11703 | |
| 11704 | gdb_assert (per_cu->is_debug_types); |
| 11705 | sig_type = (struct signatured_type *) per_cu; |
| 11706 | |
| 11707 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
| 11708 | |
| 11709 | /* If we're using .gdb_index (includes -readnow) then |
| 11710 | per_cu->type_unit_group may not have been set up yet. */ |
| 11711 | if (sig_type->type_unit_group == NULL) |
| 11712 | sig_type->type_unit_group = get_type_unit_group (cu, attr); |
| 11713 | tu_group = sig_type->type_unit_group; |
| 11714 | |
| 11715 | /* If we've already processed this stmt_list there's no real need to |
| 11716 | do it again, we could fake it and just recreate the part we need |
| 11717 | (file name,index -> symtab mapping). If data shows this optimization |
| 11718 | is useful we can do it then. */ |
| 11719 | first_time = tu_group->compunit_symtab == NULL; |
| 11720 | |
| 11721 | /* We have to handle the case of both a missing DW_AT_stmt_list or bad |
| 11722 | debug info. */ |
| 11723 | line_header_up lh; |
| 11724 | if (attr != NULL) |
| 11725 | { |
| 11726 | sect_offset line_offset = (sect_offset) DW_UNSND (attr); |
| 11727 | lh = dwarf_decode_line_header (line_offset, cu); |
| 11728 | } |
| 11729 | if (lh == NULL) |
| 11730 | { |
| 11731 | if (first_time) |
| 11732 | dwarf2_start_symtab (cu, "", NULL, 0); |
| 11733 | else |
| 11734 | { |
| 11735 | gdb_assert (tu_group->symtabs == NULL); |
| 11736 | restart_symtab (tu_group->compunit_symtab, "", 0); |
| 11737 | } |
| 11738 | return; |
| 11739 | } |
| 11740 | |
| 11741 | cu->line_header = lh.release (); |
| 11742 | cu->line_header_die_owner = die; |
| 11743 | |
| 11744 | if (first_time) |
| 11745 | { |
| 11746 | struct compunit_symtab *cust = dwarf2_start_symtab (cu, "", NULL, 0); |
| 11747 | |
| 11748 | /* Note: We don't assign tu_group->compunit_symtab yet because we're |
| 11749 | still initializing it, and our caller (a few levels up) |
| 11750 | process_full_type_unit still needs to know if this is the first |
| 11751 | time. */ |
| 11752 | |
| 11753 | tu_group->num_symtabs = cu->line_header->file_names.size (); |
| 11754 | tu_group->symtabs = XNEWVEC (struct symtab *, |
| 11755 | cu->line_header->file_names.size ()); |
| 11756 | |
| 11757 | for (i = 0; i < cu->line_header->file_names.size (); ++i) |
| 11758 | { |
| 11759 | file_entry &fe = cu->line_header->file_names[i]; |
| 11760 | |
| 11761 | dwarf2_start_subfile (fe.name, fe.include_dir (cu->line_header)); |
| 11762 | |
| 11763 | if (current_subfile->symtab == NULL) |
| 11764 | { |
| 11765 | /* NOTE: start_subfile will recognize when it's been |
| 11766 | passed a file it has already seen. So we can't |
| 11767 | assume there's a simple mapping from |
| 11768 | cu->line_header->file_names to subfiles, plus |
| 11769 | cu->line_header->file_names may contain dups. */ |
| 11770 | current_subfile->symtab |
| 11771 | = allocate_symtab (cust, current_subfile->name); |
| 11772 | } |
| 11773 | |
| 11774 | fe.symtab = current_subfile->symtab; |
| 11775 | tu_group->symtabs[i] = fe.symtab; |
| 11776 | } |
| 11777 | } |
| 11778 | else |
| 11779 | { |
| 11780 | restart_symtab (tu_group->compunit_symtab, "", 0); |
| 11781 | |
| 11782 | for (i = 0; i < cu->line_header->file_names.size (); ++i) |
| 11783 | { |
| 11784 | file_entry &fe = cu->line_header->file_names[i]; |
| 11785 | |
| 11786 | fe.symtab = tu_group->symtabs[i]; |
| 11787 | } |
| 11788 | } |
| 11789 | |
| 11790 | /* The main symtab is allocated last. Type units don't have DW_AT_name |
| 11791 | so they don't have a "real" (so to speak) symtab anyway. |
| 11792 | There is later code that will assign the main symtab to all symbols |
| 11793 | that don't have one. We need to handle the case of a symbol with a |
| 11794 | missing symtab (DW_AT_decl_file) anyway. */ |
| 11795 | } |
| 11796 | |
| 11797 | /* Process DW_TAG_type_unit. |
| 11798 | For TUs we want to skip the first top level sibling if it's not the |
| 11799 | actual type being defined by this TU. In this case the first top |
| 11800 | level sibling is there to provide context only. */ |
| 11801 | |
| 11802 | static void |
| 11803 | read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu) |
| 11804 | { |
| 11805 | struct die_info *child_die; |
| 11806 | |
| 11807 | prepare_one_comp_unit (cu, die, language_minimal); |
| 11808 | |
| 11809 | /* Initialize (or reinitialize) the machinery for building symtabs. |
| 11810 | We do this before processing child DIEs, so that the line header table |
| 11811 | is available for DW_AT_decl_file. */ |
| 11812 | setup_type_unit_groups (die, cu); |
| 11813 | |
| 11814 | if (die->child != NULL) |
| 11815 | { |
| 11816 | child_die = die->child; |
| 11817 | while (child_die && child_die->tag) |
| 11818 | { |
| 11819 | process_die (child_die, cu); |
| 11820 | child_die = sibling_die (child_die); |
| 11821 | } |
| 11822 | } |
| 11823 | } |
| 11824 | \f |
| 11825 | /* DWO/DWP files. |
| 11826 | |
| 11827 | http://gcc.gnu.org/wiki/DebugFission |
| 11828 | http://gcc.gnu.org/wiki/DebugFissionDWP |
| 11829 | |
| 11830 | To simplify handling of both DWO files ("object" files with the DWARF info) |
| 11831 | and DWP files (a file with the DWOs packaged up into one file), we treat |
| 11832 | DWP files as having a collection of virtual DWO files. */ |
| 11833 | |
| 11834 | static hashval_t |
| 11835 | hash_dwo_file (const void *item) |
| 11836 | { |
| 11837 | const struct dwo_file *dwo_file = (const struct dwo_file *) item; |
| 11838 | hashval_t hash; |
| 11839 | |
| 11840 | hash = htab_hash_string (dwo_file->dwo_name); |
| 11841 | if (dwo_file->comp_dir != NULL) |
| 11842 | hash += htab_hash_string (dwo_file->comp_dir); |
| 11843 | return hash; |
| 11844 | } |
| 11845 | |
| 11846 | static int |
| 11847 | eq_dwo_file (const void *item_lhs, const void *item_rhs) |
| 11848 | { |
| 11849 | const struct dwo_file *lhs = (const struct dwo_file *) item_lhs; |
| 11850 | const struct dwo_file *rhs = (const struct dwo_file *) item_rhs; |
| 11851 | |
| 11852 | if (strcmp (lhs->dwo_name, rhs->dwo_name) != 0) |
| 11853 | return 0; |
| 11854 | if (lhs->comp_dir == NULL || rhs->comp_dir == NULL) |
| 11855 | return lhs->comp_dir == rhs->comp_dir; |
| 11856 | return strcmp (lhs->comp_dir, rhs->comp_dir) == 0; |
| 11857 | } |
| 11858 | |
| 11859 | /* Allocate a hash table for DWO files. */ |
| 11860 | |
| 11861 | static htab_t |
| 11862 | allocate_dwo_file_hash_table (struct objfile *objfile) |
| 11863 | { |
| 11864 | return htab_create_alloc_ex (41, |
| 11865 | hash_dwo_file, |
| 11866 | eq_dwo_file, |
| 11867 | NULL, |
| 11868 | &objfile->objfile_obstack, |
| 11869 | hashtab_obstack_allocate, |
| 11870 | dummy_obstack_deallocate); |
| 11871 | } |
| 11872 | |
| 11873 | /* Lookup DWO file DWO_NAME. */ |
| 11874 | |
| 11875 | static void ** |
| 11876 | lookup_dwo_file_slot (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 11877 | const char *dwo_name, |
| 11878 | const char *comp_dir) |
| 11879 | { |
| 11880 | struct dwo_file find_entry; |
| 11881 | void **slot; |
| 11882 | |
| 11883 | if (dwarf2_per_objfile->dwo_files == NULL) |
| 11884 | dwarf2_per_objfile->dwo_files |
| 11885 | = allocate_dwo_file_hash_table (dwarf2_per_objfile->objfile); |
| 11886 | |
| 11887 | memset (&find_entry, 0, sizeof (find_entry)); |
| 11888 | find_entry.dwo_name = dwo_name; |
| 11889 | find_entry.comp_dir = comp_dir; |
| 11890 | slot = htab_find_slot (dwarf2_per_objfile->dwo_files, &find_entry, INSERT); |
| 11891 | |
| 11892 | return slot; |
| 11893 | } |
| 11894 | |
| 11895 | static hashval_t |
| 11896 | hash_dwo_unit (const void *item) |
| 11897 | { |
| 11898 | const struct dwo_unit *dwo_unit = (const struct dwo_unit *) item; |
| 11899 | |
| 11900 | /* This drops the top 32 bits of the id, but is ok for a hash. */ |
| 11901 | return dwo_unit->signature; |
| 11902 | } |
| 11903 | |
| 11904 | static int |
| 11905 | eq_dwo_unit (const void *item_lhs, const void *item_rhs) |
| 11906 | { |
| 11907 | const struct dwo_unit *lhs = (const struct dwo_unit *) item_lhs; |
| 11908 | const struct dwo_unit *rhs = (const struct dwo_unit *) item_rhs; |
| 11909 | |
| 11910 | /* The signature is assumed to be unique within the DWO file. |
| 11911 | So while object file CU dwo_id's always have the value zero, |
| 11912 | that's OK, assuming each object file DWO file has only one CU, |
| 11913 | and that's the rule for now. */ |
| 11914 | return lhs->signature == rhs->signature; |
| 11915 | } |
| 11916 | |
| 11917 | /* Allocate a hash table for DWO CUs,TUs. |
| 11918 | There is one of these tables for each of CUs,TUs for each DWO file. */ |
| 11919 | |
| 11920 | static htab_t |
| 11921 | allocate_dwo_unit_table (struct objfile *objfile) |
| 11922 | { |
| 11923 | /* Start out with a pretty small number. |
| 11924 | Generally DWO files contain only one CU and maybe some TUs. */ |
| 11925 | return htab_create_alloc_ex (3, |
| 11926 | hash_dwo_unit, |
| 11927 | eq_dwo_unit, |
| 11928 | NULL, |
| 11929 | &objfile->objfile_obstack, |
| 11930 | hashtab_obstack_allocate, |
| 11931 | dummy_obstack_deallocate); |
| 11932 | } |
| 11933 | |
| 11934 | /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */ |
| 11935 | |
| 11936 | struct create_dwo_cu_data |
| 11937 | { |
| 11938 | struct dwo_file *dwo_file; |
| 11939 | struct dwo_unit dwo_unit; |
| 11940 | }; |
| 11941 | |
| 11942 | /* die_reader_func for create_dwo_cu. */ |
| 11943 | |
| 11944 | static void |
| 11945 | create_dwo_cu_reader (const struct die_reader_specs *reader, |
| 11946 | const gdb_byte *info_ptr, |
| 11947 | struct die_info *comp_unit_die, |
| 11948 | int has_children, |
| 11949 | void *datap) |
| 11950 | { |
| 11951 | struct dwarf2_cu *cu = reader->cu; |
| 11952 | sect_offset sect_off = cu->per_cu->sect_off; |
| 11953 | struct dwarf2_section_info *section = cu->per_cu->section; |
| 11954 | struct create_dwo_cu_data *data = (struct create_dwo_cu_data *) datap; |
| 11955 | struct dwo_file *dwo_file = data->dwo_file; |
| 11956 | struct dwo_unit *dwo_unit = &data->dwo_unit; |
| 11957 | struct attribute *attr; |
| 11958 | |
| 11959 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); |
| 11960 | if (attr == NULL) |
| 11961 | { |
| 11962 | complaint (&symfile_complaints, |
| 11963 | _("Dwarf Error: debug entry at offset 0x%x is missing" |
| 11964 | " its dwo_id [in module %s]"), |
| 11965 | to_underlying (sect_off), dwo_file->dwo_name); |
| 11966 | return; |
| 11967 | } |
| 11968 | |
| 11969 | dwo_unit->dwo_file = dwo_file; |
| 11970 | dwo_unit->signature = DW_UNSND (attr); |
| 11971 | dwo_unit->section = section; |
| 11972 | dwo_unit->sect_off = sect_off; |
| 11973 | dwo_unit->length = cu->per_cu->length; |
| 11974 | |
| 11975 | if (dwarf_read_debug) |
| 11976 | fprintf_unfiltered (gdb_stdlog, " offset 0x%x, dwo_id %s\n", |
| 11977 | to_underlying (sect_off), |
| 11978 | hex_string (dwo_unit->signature)); |
| 11979 | } |
| 11980 | |
| 11981 | /* Create the dwo_units for the CUs in a DWO_FILE. |
| 11982 | Note: This function processes DWO files only, not DWP files. */ |
| 11983 | |
| 11984 | static void |
| 11985 | create_cus_hash_table (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 11986 | struct dwo_file &dwo_file, dwarf2_section_info §ion, |
| 11987 | htab_t &cus_htab) |
| 11988 | { |
| 11989 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 11990 | const gdb_byte *info_ptr, *end_ptr; |
| 11991 | |
| 11992 | dwarf2_read_section (objfile, §ion); |
| 11993 | info_ptr = section.buffer; |
| 11994 | |
| 11995 | if (info_ptr == NULL) |
| 11996 | return; |
| 11997 | |
| 11998 | if (dwarf_read_debug) |
| 11999 | { |
| 12000 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n", |
| 12001 | get_section_name (§ion), |
| 12002 | get_section_file_name (§ion)); |
| 12003 | } |
| 12004 | |
| 12005 | end_ptr = info_ptr + section.size; |
| 12006 | while (info_ptr < end_ptr) |
| 12007 | { |
| 12008 | struct dwarf2_per_cu_data per_cu; |
| 12009 | struct create_dwo_cu_data create_dwo_cu_data; |
| 12010 | struct dwo_unit *dwo_unit; |
| 12011 | void **slot; |
| 12012 | sect_offset sect_off = (sect_offset) (info_ptr - section.buffer); |
| 12013 | |
| 12014 | memset (&create_dwo_cu_data.dwo_unit, 0, |
| 12015 | sizeof (create_dwo_cu_data.dwo_unit)); |
| 12016 | memset (&per_cu, 0, sizeof (per_cu)); |
| 12017 | per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
| 12018 | per_cu.is_debug_types = 0; |
| 12019 | per_cu.sect_off = sect_offset (info_ptr - section.buffer); |
| 12020 | per_cu.section = §ion; |
| 12021 | create_dwo_cu_data.dwo_file = &dwo_file; |
| 12022 | |
| 12023 | init_cutu_and_read_dies_no_follow ( |
| 12024 | &per_cu, &dwo_file, create_dwo_cu_reader, &create_dwo_cu_data); |
| 12025 | info_ptr += per_cu.length; |
| 12026 | |
| 12027 | // If the unit could not be parsed, skip it. |
| 12028 | if (create_dwo_cu_data.dwo_unit.dwo_file == NULL) |
| 12029 | continue; |
| 12030 | |
| 12031 | if (cus_htab == NULL) |
| 12032 | cus_htab = allocate_dwo_unit_table (objfile); |
| 12033 | |
| 12034 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); |
| 12035 | *dwo_unit = create_dwo_cu_data.dwo_unit; |
| 12036 | slot = htab_find_slot (cus_htab, dwo_unit, INSERT); |
| 12037 | gdb_assert (slot != NULL); |
| 12038 | if (*slot != NULL) |
| 12039 | { |
| 12040 | const struct dwo_unit *dup_cu = (const struct dwo_unit *)*slot; |
| 12041 | sect_offset dup_sect_off = dup_cu->sect_off; |
| 12042 | |
| 12043 | complaint (&symfile_complaints, |
| 12044 | _("debug cu entry at offset 0x%x is duplicate to" |
| 12045 | " the entry at offset 0x%x, signature %s"), |
| 12046 | to_underlying (sect_off), to_underlying (dup_sect_off), |
| 12047 | hex_string (dwo_unit->signature)); |
| 12048 | } |
| 12049 | *slot = (void *)dwo_unit; |
| 12050 | } |
| 12051 | } |
| 12052 | |
| 12053 | /* DWP file .debug_{cu,tu}_index section format: |
| 12054 | [ref: http://gcc.gnu.org/wiki/DebugFissionDWP] |
| 12055 | |
| 12056 | DWP Version 1: |
| 12057 | |
| 12058 | Both index sections have the same format, and serve to map a 64-bit |
| 12059 | signature to a set of section numbers. Each section begins with a header, |
| 12060 | followed by a hash table of 64-bit signatures, a parallel table of 32-bit |
| 12061 | indexes, and a pool of 32-bit section numbers. The index sections will be |
| 12062 | aligned at 8-byte boundaries in the file. |
| 12063 | |
| 12064 | The index section header consists of: |
| 12065 | |
| 12066 | V, 32 bit version number |
| 12067 | -, 32 bits unused |
| 12068 | N, 32 bit number of compilation units or type units in the index |
| 12069 | M, 32 bit number of slots in the hash table |
| 12070 | |
| 12071 | Numbers are recorded using the byte order of the application binary. |
| 12072 | |
| 12073 | The hash table begins at offset 16 in the section, and consists of an array |
| 12074 | of M 64-bit slots. Each slot contains a 64-bit signature (using the byte |
| 12075 | order of the application binary). Unused slots in the hash table are 0. |
| 12076 | (We rely on the extreme unlikeliness of a signature being exactly 0.) |
| 12077 | |
| 12078 | The parallel table begins immediately after the hash table |
| 12079 | (at offset 16 + 8 * M from the beginning of the section), and consists of an |
| 12080 | array of 32-bit indexes (using the byte order of the application binary), |
| 12081 | corresponding 1-1 with slots in the hash table. Each entry in the parallel |
| 12082 | table contains a 32-bit index into the pool of section numbers. For unused |
| 12083 | hash table slots, the corresponding entry in the parallel table will be 0. |
| 12084 | |
| 12085 | The pool of section numbers begins immediately following the hash table |
| 12086 | (at offset 16 + 12 * M from the beginning of the section). The pool of |
| 12087 | section numbers consists of an array of 32-bit words (using the byte order |
| 12088 | of the application binary). Each item in the array is indexed starting |
| 12089 | from 0. The hash table entry provides the index of the first section |
| 12090 | number in the set. Additional section numbers in the set follow, and the |
| 12091 | set is terminated by a 0 entry (section number 0 is not used in ELF). |
| 12092 | |
| 12093 | In each set of section numbers, the .debug_info.dwo or .debug_types.dwo |
| 12094 | section must be the first entry in the set, and the .debug_abbrev.dwo must |
| 12095 | be the second entry. Other members of the set may follow in any order. |
| 12096 | |
| 12097 | --- |
| 12098 | |
| 12099 | DWP Version 2: |
| 12100 | |
| 12101 | DWP Version 2 combines all the .debug_info, etc. sections into one, |
| 12102 | and the entries in the index tables are now offsets into these sections. |
| 12103 | CU offsets begin at 0. TU offsets begin at the size of the .debug_info |
| 12104 | section. |
| 12105 | |
| 12106 | Index Section Contents: |
| 12107 | Header |
| 12108 | Hash Table of Signatures dwp_hash_table.hash_table |
| 12109 | Parallel Table of Indices dwp_hash_table.unit_table |
| 12110 | Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets} |
| 12111 | Table of Section Sizes dwp_hash_table.v2.sizes |
| 12112 | |
| 12113 | The index section header consists of: |
| 12114 | |
| 12115 | V, 32 bit version number |
| 12116 | L, 32 bit number of columns in the table of section offsets |
| 12117 | N, 32 bit number of compilation units or type units in the index |
| 12118 | M, 32 bit number of slots in the hash table |
| 12119 | |
| 12120 | Numbers are recorded using the byte order of the application binary. |
| 12121 | |
| 12122 | The hash table has the same format as version 1. |
| 12123 | The parallel table of indices has the same format as version 1, |
| 12124 | except that the entries are origin-1 indices into the table of sections |
| 12125 | offsets and the table of section sizes. |
| 12126 | |
| 12127 | The table of offsets begins immediately following the parallel table |
| 12128 | (at offset 16 + 12 * M from the beginning of the section). The table is |
| 12129 | a two-dimensional array of 32-bit words (using the byte order of the |
| 12130 | application binary), with L columns and N+1 rows, in row-major order. |
| 12131 | Each row in the array is indexed starting from 0. The first row provides |
| 12132 | a key to the remaining rows: each column in this row provides an identifier |
| 12133 | for a debug section, and the offsets in the same column of subsequent rows |
| 12134 | refer to that section. The section identifiers are: |
| 12135 | |
| 12136 | DW_SECT_INFO 1 .debug_info.dwo |
| 12137 | DW_SECT_TYPES 2 .debug_types.dwo |
| 12138 | DW_SECT_ABBREV 3 .debug_abbrev.dwo |
| 12139 | DW_SECT_LINE 4 .debug_line.dwo |
| 12140 | DW_SECT_LOC 5 .debug_loc.dwo |
| 12141 | DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo |
| 12142 | DW_SECT_MACINFO 7 .debug_macinfo.dwo |
| 12143 | DW_SECT_MACRO 8 .debug_macro.dwo |
| 12144 | |
| 12145 | The offsets provided by the CU and TU index sections are the base offsets |
| 12146 | for the contributions made by each CU or TU to the corresponding section |
| 12147 | in the package file. Each CU and TU header contains an abbrev_offset |
| 12148 | field, used to find the abbreviations table for that CU or TU within the |
| 12149 | contribution to the .debug_abbrev.dwo section for that CU or TU, and should |
| 12150 | be interpreted as relative to the base offset given in the index section. |
| 12151 | Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes |
| 12152 | should be interpreted as relative to the base offset for .debug_line.dwo, |
| 12153 | and offsets into other debug sections obtained from DWARF attributes should |
| 12154 | also be interpreted as relative to the corresponding base offset. |
| 12155 | |
| 12156 | The table of sizes begins immediately following the table of offsets. |
| 12157 | Like the table of offsets, it is a two-dimensional array of 32-bit words, |
| 12158 | with L columns and N rows, in row-major order. Each row in the array is |
| 12159 | indexed starting from 1 (row 0 is shared by the two tables). |
| 12160 | |
| 12161 | --- |
| 12162 | |
| 12163 | Hash table lookup is handled the same in version 1 and 2: |
| 12164 | |
| 12165 | We assume that N and M will not exceed 2^32 - 1. |
| 12166 | The size of the hash table, M, must be 2^k such that 2^k > 3*N/2. |
| 12167 | |
| 12168 | Given a 64-bit compilation unit signature or a type signature S, an entry |
| 12169 | in the hash table is located as follows: |
| 12170 | |
| 12171 | 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with |
| 12172 | the low-order k bits all set to 1. |
| 12173 | |
| 12174 | 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1). |
| 12175 | |
| 12176 | 3) If the hash table entry at index H matches the signature, use that |
| 12177 | entry. If the hash table entry at index H is unused (all zeroes), |
| 12178 | terminate the search: the signature is not present in the table. |
| 12179 | |
| 12180 | 4) Let H = (H + H') modulo M. Repeat at Step 3. |
| 12181 | |
| 12182 | Because M > N and H' and M are relatively prime, the search is guaranteed |
| 12183 | to stop at an unused slot or find the match. */ |
| 12184 | |
| 12185 | /* Create a hash table to map DWO IDs to their CU/TU entry in |
| 12186 | .debug_{info,types}.dwo in DWP_FILE. |
| 12187 | Returns NULL if there isn't one. |
| 12188 | Note: This function processes DWP files only, not DWO files. */ |
| 12189 | |
| 12190 | static struct dwp_hash_table * |
| 12191 | create_dwp_hash_table (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 12192 | struct dwp_file *dwp_file, int is_debug_types) |
| 12193 | { |
| 12194 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 12195 | bfd *dbfd = dwp_file->dbfd; |
| 12196 | const gdb_byte *index_ptr, *index_end; |
| 12197 | struct dwarf2_section_info *index; |
| 12198 | uint32_t version, nr_columns, nr_units, nr_slots; |
| 12199 | struct dwp_hash_table *htab; |
| 12200 | |
| 12201 | if (is_debug_types) |
| 12202 | index = &dwp_file->sections.tu_index; |
| 12203 | else |
| 12204 | index = &dwp_file->sections.cu_index; |
| 12205 | |
| 12206 | if (dwarf2_section_empty_p (index)) |
| 12207 | return NULL; |
| 12208 | dwarf2_read_section (objfile, index); |
| 12209 | |
| 12210 | index_ptr = index->buffer; |
| 12211 | index_end = index_ptr + index->size; |
| 12212 | |
| 12213 | version = read_4_bytes (dbfd, index_ptr); |
| 12214 | index_ptr += 4; |
| 12215 | if (version == 2) |
| 12216 | nr_columns = read_4_bytes (dbfd, index_ptr); |
| 12217 | else |
| 12218 | nr_columns = 0; |
| 12219 | index_ptr += 4; |
| 12220 | nr_units = read_4_bytes (dbfd, index_ptr); |
| 12221 | index_ptr += 4; |
| 12222 | nr_slots = read_4_bytes (dbfd, index_ptr); |
| 12223 | index_ptr += 4; |
| 12224 | |
| 12225 | if (version != 1 && version != 2) |
| 12226 | { |
| 12227 | error (_("Dwarf Error: unsupported DWP file version (%s)" |
| 12228 | " [in module %s]"), |
| 12229 | pulongest (version), dwp_file->name); |
| 12230 | } |
| 12231 | if (nr_slots != (nr_slots & -nr_slots)) |
| 12232 | { |
| 12233 | error (_("Dwarf Error: number of slots in DWP hash table (%s)" |
| 12234 | " is not power of 2 [in module %s]"), |
| 12235 | pulongest (nr_slots), dwp_file->name); |
| 12236 | } |
| 12237 | |
| 12238 | htab = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_hash_table); |
| 12239 | htab->version = version; |
| 12240 | htab->nr_columns = nr_columns; |
| 12241 | htab->nr_units = nr_units; |
| 12242 | htab->nr_slots = nr_slots; |
| 12243 | htab->hash_table = index_ptr; |
| 12244 | htab->unit_table = htab->hash_table + sizeof (uint64_t) * nr_slots; |
| 12245 | |
| 12246 | /* Exit early if the table is empty. */ |
| 12247 | if (nr_slots == 0 || nr_units == 0 |
| 12248 | || (version == 2 && nr_columns == 0)) |
| 12249 | { |
| 12250 | /* All must be zero. */ |
| 12251 | if (nr_slots != 0 || nr_units != 0 |
| 12252 | || (version == 2 && nr_columns != 0)) |
| 12253 | { |
| 12254 | complaint (&symfile_complaints, |
| 12255 | _("Empty DWP but nr_slots,nr_units,nr_columns not" |
| 12256 | " all zero [in modules %s]"), |
| 12257 | dwp_file->name); |
| 12258 | } |
| 12259 | return htab; |
| 12260 | } |
| 12261 | |
| 12262 | if (version == 1) |
| 12263 | { |
| 12264 | htab->section_pool.v1.indices = |
| 12265 | htab->unit_table + sizeof (uint32_t) * nr_slots; |
| 12266 | /* It's harder to decide whether the section is too small in v1. |
| 12267 | V1 is deprecated anyway so we punt. */ |
| 12268 | } |
| 12269 | else |
| 12270 | { |
| 12271 | const gdb_byte *ids_ptr = htab->unit_table + sizeof (uint32_t) * nr_slots; |
| 12272 | int *ids = htab->section_pool.v2.section_ids; |
| 12273 | /* Reverse map for error checking. */ |
| 12274 | int ids_seen[DW_SECT_MAX + 1]; |
| 12275 | int i; |
| 12276 | |
| 12277 | if (nr_columns < 2) |
| 12278 | { |
| 12279 | error (_("Dwarf Error: bad DWP hash table, too few columns" |
| 12280 | " in section table [in module %s]"), |
| 12281 | dwp_file->name); |
| 12282 | } |
| 12283 | if (nr_columns > MAX_NR_V2_DWO_SECTIONS) |
| 12284 | { |
| 12285 | error (_("Dwarf Error: bad DWP hash table, too many columns" |
| 12286 | " in section table [in module %s]"), |
| 12287 | dwp_file->name); |
| 12288 | } |
| 12289 | memset (ids, 255, (DW_SECT_MAX + 1) * sizeof (int32_t)); |
| 12290 | memset (ids_seen, 255, (DW_SECT_MAX + 1) * sizeof (int32_t)); |
| 12291 | for (i = 0; i < nr_columns; ++i) |
| 12292 | { |
| 12293 | int id = read_4_bytes (dbfd, ids_ptr + i * sizeof (uint32_t)); |
| 12294 | |
| 12295 | if (id < DW_SECT_MIN || id > DW_SECT_MAX) |
| 12296 | { |
| 12297 | error (_("Dwarf Error: bad DWP hash table, bad section id %d" |
| 12298 | " in section table [in module %s]"), |
| 12299 | id, dwp_file->name); |
| 12300 | } |
| 12301 | if (ids_seen[id] != -1) |
| 12302 | { |
| 12303 | error (_("Dwarf Error: bad DWP hash table, duplicate section" |
| 12304 | " id %d in section table [in module %s]"), |
| 12305 | id, dwp_file->name); |
| 12306 | } |
| 12307 | ids_seen[id] = i; |
| 12308 | ids[i] = id; |
| 12309 | } |
| 12310 | /* Must have exactly one info or types section. */ |
| 12311 | if (((ids_seen[DW_SECT_INFO] != -1) |
| 12312 | + (ids_seen[DW_SECT_TYPES] != -1)) |
| 12313 | != 1) |
| 12314 | { |
| 12315 | error (_("Dwarf Error: bad DWP hash table, missing/duplicate" |
| 12316 | " DWO info/types section [in module %s]"), |
| 12317 | dwp_file->name); |
| 12318 | } |
| 12319 | /* Must have an abbrev section. */ |
| 12320 | if (ids_seen[DW_SECT_ABBREV] == -1) |
| 12321 | { |
| 12322 | error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev" |
| 12323 | " section [in module %s]"), |
| 12324 | dwp_file->name); |
| 12325 | } |
| 12326 | htab->section_pool.v2.offsets = ids_ptr + sizeof (uint32_t) * nr_columns; |
| 12327 | htab->section_pool.v2.sizes = |
| 12328 | htab->section_pool.v2.offsets + (sizeof (uint32_t) |
| 12329 | * nr_units * nr_columns); |
| 12330 | if ((htab->section_pool.v2.sizes + (sizeof (uint32_t) |
| 12331 | * nr_units * nr_columns)) |
| 12332 | > index_end) |
| 12333 | { |
| 12334 | error (_("Dwarf Error: DWP index section is corrupt (too small)" |
| 12335 | " [in module %s]"), |
| 12336 | dwp_file->name); |
| 12337 | } |
| 12338 | } |
| 12339 | |
| 12340 | return htab; |
| 12341 | } |
| 12342 | |
| 12343 | /* Update SECTIONS with the data from SECTP. |
| 12344 | |
| 12345 | This function is like the other "locate" section routines that are |
| 12346 | passed to bfd_map_over_sections, but in this context the sections to |
| 12347 | read comes from the DWP V1 hash table, not the full ELF section table. |
| 12348 | |
| 12349 | The result is non-zero for success, or zero if an error was found. */ |
| 12350 | |
| 12351 | static int |
| 12352 | locate_v1_virtual_dwo_sections (asection *sectp, |
| 12353 | struct virtual_v1_dwo_sections *sections) |
| 12354 | { |
| 12355 | const struct dwop_section_names *names = &dwop_section_names; |
| 12356 | |
| 12357 | if (section_is_p (sectp->name, &names->abbrev_dwo)) |
| 12358 | { |
| 12359 | /* There can be only one. */ |
| 12360 | if (sections->abbrev.s.section != NULL) |
| 12361 | return 0; |
| 12362 | sections->abbrev.s.section = sectp; |
| 12363 | sections->abbrev.size = bfd_get_section_size (sectp); |
| 12364 | } |
| 12365 | else if (section_is_p (sectp->name, &names->info_dwo) |
| 12366 | || section_is_p (sectp->name, &names->types_dwo)) |
| 12367 | { |
| 12368 | /* There can be only one. */ |
| 12369 | if (sections->info_or_types.s.section != NULL) |
| 12370 | return 0; |
| 12371 | sections->info_or_types.s.section = sectp; |
| 12372 | sections->info_or_types.size = bfd_get_section_size (sectp); |
| 12373 | } |
| 12374 | else if (section_is_p (sectp->name, &names->line_dwo)) |
| 12375 | { |
| 12376 | /* There can be only one. */ |
| 12377 | if (sections->line.s.section != NULL) |
| 12378 | return 0; |
| 12379 | sections->line.s.section = sectp; |
| 12380 | sections->line.size = bfd_get_section_size (sectp); |
| 12381 | } |
| 12382 | else if (section_is_p (sectp->name, &names->loc_dwo)) |
| 12383 | { |
| 12384 | /* There can be only one. */ |
| 12385 | if (sections->loc.s.section != NULL) |
| 12386 | return 0; |
| 12387 | sections->loc.s.section = sectp; |
| 12388 | sections->loc.size = bfd_get_section_size (sectp); |
| 12389 | } |
| 12390 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) |
| 12391 | { |
| 12392 | /* There can be only one. */ |
| 12393 | if (sections->macinfo.s.section != NULL) |
| 12394 | return 0; |
| 12395 | sections->macinfo.s.section = sectp; |
| 12396 | sections->macinfo.size = bfd_get_section_size (sectp); |
| 12397 | } |
| 12398 | else if (section_is_p (sectp->name, &names->macro_dwo)) |
| 12399 | { |
| 12400 | /* There can be only one. */ |
| 12401 | if (sections->macro.s.section != NULL) |
| 12402 | return 0; |
| 12403 | sections->macro.s.section = sectp; |
| 12404 | sections->macro.size = bfd_get_section_size (sectp); |
| 12405 | } |
| 12406 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) |
| 12407 | { |
| 12408 | /* There can be only one. */ |
| 12409 | if (sections->str_offsets.s.section != NULL) |
| 12410 | return 0; |
| 12411 | sections->str_offsets.s.section = sectp; |
| 12412 | sections->str_offsets.size = bfd_get_section_size (sectp); |
| 12413 | } |
| 12414 | else |
| 12415 | { |
| 12416 | /* No other kind of section is valid. */ |
| 12417 | return 0; |
| 12418 | } |
| 12419 | |
| 12420 | return 1; |
| 12421 | } |
| 12422 | |
| 12423 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. |
| 12424 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. |
| 12425 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. |
| 12426 | This is for DWP version 1 files. */ |
| 12427 | |
| 12428 | static struct dwo_unit * |
| 12429 | create_dwo_unit_in_dwp_v1 (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 12430 | struct dwp_file *dwp_file, |
| 12431 | uint32_t unit_index, |
| 12432 | const char *comp_dir, |
| 12433 | ULONGEST signature, int is_debug_types) |
| 12434 | { |
| 12435 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 12436 | const struct dwp_hash_table *dwp_htab = |
| 12437 | is_debug_types ? dwp_file->tus : dwp_file->cus; |
| 12438 | bfd *dbfd = dwp_file->dbfd; |
| 12439 | const char *kind = is_debug_types ? "TU" : "CU"; |
| 12440 | struct dwo_file *dwo_file; |
| 12441 | struct dwo_unit *dwo_unit; |
| 12442 | struct virtual_v1_dwo_sections sections; |
| 12443 | void **dwo_file_slot; |
| 12444 | int i; |
| 12445 | |
| 12446 | gdb_assert (dwp_file->version == 1); |
| 12447 | |
| 12448 | if (dwarf_read_debug) |
| 12449 | { |
| 12450 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V1 file: %s\n", |
| 12451 | kind, |
| 12452 | pulongest (unit_index), hex_string (signature), |
| 12453 | dwp_file->name); |
| 12454 | } |
| 12455 | |
| 12456 | /* Fetch the sections of this DWO unit. |
| 12457 | Put a limit on the number of sections we look for so that bad data |
| 12458 | doesn't cause us to loop forever. */ |
| 12459 | |
| 12460 | #define MAX_NR_V1_DWO_SECTIONS \ |
| 12461 | (1 /* .debug_info or .debug_types */ \ |
| 12462 | + 1 /* .debug_abbrev */ \ |
| 12463 | + 1 /* .debug_line */ \ |
| 12464 | + 1 /* .debug_loc */ \ |
| 12465 | + 1 /* .debug_str_offsets */ \ |
| 12466 | + 1 /* .debug_macro or .debug_macinfo */ \ |
| 12467 | + 1 /* trailing zero */) |
| 12468 | |
| 12469 | memset (§ions, 0, sizeof (sections)); |
| 12470 | |
| 12471 | for (i = 0; i < MAX_NR_V1_DWO_SECTIONS; ++i) |
| 12472 | { |
| 12473 | asection *sectp; |
| 12474 | uint32_t section_nr = |
| 12475 | read_4_bytes (dbfd, |
| 12476 | dwp_htab->section_pool.v1.indices |
| 12477 | + (unit_index + i) * sizeof (uint32_t)); |
| 12478 | |
| 12479 | if (section_nr == 0) |
| 12480 | break; |
| 12481 | if (section_nr >= dwp_file->num_sections) |
| 12482 | { |
| 12483 | error (_("Dwarf Error: bad DWP hash table, section number too large" |
| 12484 | " [in module %s]"), |
| 12485 | dwp_file->name); |
| 12486 | } |
| 12487 | |
| 12488 | sectp = dwp_file->elf_sections[section_nr]; |
| 12489 | if (! locate_v1_virtual_dwo_sections (sectp, §ions)) |
| 12490 | { |
| 12491 | error (_("Dwarf Error: bad DWP hash table, invalid section found" |
| 12492 | " [in module %s]"), |
| 12493 | dwp_file->name); |
| 12494 | } |
| 12495 | } |
| 12496 | |
| 12497 | if (i < 2 |
| 12498 | || dwarf2_section_empty_p (§ions.info_or_types) |
| 12499 | || dwarf2_section_empty_p (§ions.abbrev)) |
| 12500 | { |
| 12501 | error (_("Dwarf Error: bad DWP hash table, missing DWO sections" |
| 12502 | " [in module %s]"), |
| 12503 | dwp_file->name); |
| 12504 | } |
| 12505 | if (i == MAX_NR_V1_DWO_SECTIONS) |
| 12506 | { |
| 12507 | error (_("Dwarf Error: bad DWP hash table, too many DWO sections" |
| 12508 | " [in module %s]"), |
| 12509 | dwp_file->name); |
| 12510 | } |
| 12511 | |
| 12512 | /* It's easier for the rest of the code if we fake a struct dwo_file and |
| 12513 | have dwo_unit "live" in that. At least for now. |
| 12514 | |
| 12515 | The DWP file can be made up of a random collection of CUs and TUs. |
| 12516 | However, for each CU + set of TUs that came from the same original DWO |
| 12517 | file, we can combine them back into a virtual DWO file to save space |
| 12518 | (fewer struct dwo_file objects to allocate). Remember that for really |
| 12519 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ |
| 12520 | |
| 12521 | std::string virtual_dwo_name = |
| 12522 | string_printf ("virtual-dwo/%d-%d-%d-%d", |
| 12523 | get_section_id (§ions.abbrev), |
| 12524 | get_section_id (§ions.line), |
| 12525 | get_section_id (§ions.loc), |
| 12526 | get_section_id (§ions.str_offsets)); |
| 12527 | /* Can we use an existing virtual DWO file? */ |
| 12528 | dwo_file_slot = lookup_dwo_file_slot (dwarf2_per_objfile, |
| 12529 | virtual_dwo_name.c_str (), |
| 12530 | comp_dir); |
| 12531 | /* Create one if necessary. */ |
| 12532 | if (*dwo_file_slot == NULL) |
| 12533 | { |
| 12534 | if (dwarf_read_debug) |
| 12535 | { |
| 12536 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", |
| 12537 | virtual_dwo_name.c_str ()); |
| 12538 | } |
| 12539 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); |
| 12540 | dwo_file->dwo_name |
| 12541 | = (const char *) obstack_copy0 (&objfile->objfile_obstack, |
| 12542 | virtual_dwo_name.c_str (), |
| 12543 | virtual_dwo_name.size ()); |
| 12544 | dwo_file->comp_dir = comp_dir; |
| 12545 | dwo_file->sections.abbrev = sections.abbrev; |
| 12546 | dwo_file->sections.line = sections.line; |
| 12547 | dwo_file->sections.loc = sections.loc; |
| 12548 | dwo_file->sections.macinfo = sections.macinfo; |
| 12549 | dwo_file->sections.macro = sections.macro; |
| 12550 | dwo_file->sections.str_offsets = sections.str_offsets; |
| 12551 | /* The "str" section is global to the entire DWP file. */ |
| 12552 | dwo_file->sections.str = dwp_file->sections.str; |
| 12553 | /* The info or types section is assigned below to dwo_unit, |
| 12554 | there's no need to record it in dwo_file. |
| 12555 | Also, we can't simply record type sections in dwo_file because |
| 12556 | we record a pointer into the vector in dwo_unit. As we collect more |
| 12557 | types we'll grow the vector and eventually have to reallocate space |
| 12558 | for it, invalidating all copies of pointers into the previous |
| 12559 | contents. */ |
| 12560 | *dwo_file_slot = dwo_file; |
| 12561 | } |
| 12562 | else |
| 12563 | { |
| 12564 | if (dwarf_read_debug) |
| 12565 | { |
| 12566 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", |
| 12567 | virtual_dwo_name.c_str ()); |
| 12568 | } |
| 12569 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
| 12570 | } |
| 12571 | |
| 12572 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); |
| 12573 | dwo_unit->dwo_file = dwo_file; |
| 12574 | dwo_unit->signature = signature; |
| 12575 | dwo_unit->section = |
| 12576 | XOBNEW (&objfile->objfile_obstack, struct dwarf2_section_info); |
| 12577 | *dwo_unit->section = sections.info_or_types; |
| 12578 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ |
| 12579 | |
| 12580 | return dwo_unit; |
| 12581 | } |
| 12582 | |
| 12583 | /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it. |
| 12584 | Given a pointer to the containing section SECTION, and OFFSET,SIZE of the |
| 12585 | piece within that section used by a TU/CU, return a virtual section |
| 12586 | of just that piece. */ |
| 12587 | |
| 12588 | static struct dwarf2_section_info |
| 12589 | create_dwp_v2_section (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 12590 | struct dwarf2_section_info *section, |
| 12591 | bfd_size_type offset, bfd_size_type size) |
| 12592 | { |
| 12593 | struct dwarf2_section_info result; |
| 12594 | asection *sectp; |
| 12595 | |
| 12596 | gdb_assert (section != NULL); |
| 12597 | gdb_assert (!section->is_virtual); |
| 12598 | |
| 12599 | memset (&result, 0, sizeof (result)); |
| 12600 | result.s.containing_section = section; |
| 12601 | result.is_virtual = 1; |
| 12602 | |
| 12603 | if (size == 0) |
| 12604 | return result; |
| 12605 | |
| 12606 | sectp = get_section_bfd_section (section); |
| 12607 | |
| 12608 | /* Flag an error if the piece denoted by OFFSET,SIZE is outside the |
| 12609 | bounds of the real section. This is a pretty-rare event, so just |
| 12610 | flag an error (easier) instead of a warning and trying to cope. */ |
| 12611 | if (sectp == NULL |
| 12612 | || offset + size > bfd_get_section_size (sectp)) |
| 12613 | { |
| 12614 | error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit" |
| 12615 | " in section %s [in module %s]"), |
| 12616 | sectp ? bfd_section_name (abfd, sectp) : "<unknown>", |
| 12617 | objfile_name (dwarf2_per_objfile->objfile)); |
| 12618 | } |
| 12619 | |
| 12620 | result.virtual_offset = offset; |
| 12621 | result.size = size; |
| 12622 | return result; |
| 12623 | } |
| 12624 | |
| 12625 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. |
| 12626 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. |
| 12627 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. |
| 12628 | This is for DWP version 2 files. */ |
| 12629 | |
| 12630 | static struct dwo_unit * |
| 12631 | create_dwo_unit_in_dwp_v2 (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 12632 | struct dwp_file *dwp_file, |
| 12633 | uint32_t unit_index, |
| 12634 | const char *comp_dir, |
| 12635 | ULONGEST signature, int is_debug_types) |
| 12636 | { |
| 12637 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 12638 | const struct dwp_hash_table *dwp_htab = |
| 12639 | is_debug_types ? dwp_file->tus : dwp_file->cus; |
| 12640 | bfd *dbfd = dwp_file->dbfd; |
| 12641 | const char *kind = is_debug_types ? "TU" : "CU"; |
| 12642 | struct dwo_file *dwo_file; |
| 12643 | struct dwo_unit *dwo_unit; |
| 12644 | struct virtual_v2_dwo_sections sections; |
| 12645 | void **dwo_file_slot; |
| 12646 | int i; |
| 12647 | |
| 12648 | gdb_assert (dwp_file->version == 2); |
| 12649 | |
| 12650 | if (dwarf_read_debug) |
| 12651 | { |
| 12652 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V2 file: %s\n", |
| 12653 | kind, |
| 12654 | pulongest (unit_index), hex_string (signature), |
| 12655 | dwp_file->name); |
| 12656 | } |
| 12657 | |
| 12658 | /* Fetch the section offsets of this DWO unit. */ |
| 12659 | |
| 12660 | memset (§ions, 0, sizeof (sections)); |
| 12661 | |
| 12662 | for (i = 0; i < dwp_htab->nr_columns; ++i) |
| 12663 | { |
| 12664 | uint32_t offset = read_4_bytes (dbfd, |
| 12665 | dwp_htab->section_pool.v2.offsets |
| 12666 | + (((unit_index - 1) * dwp_htab->nr_columns |
| 12667 | + i) |
| 12668 | * sizeof (uint32_t))); |
| 12669 | uint32_t size = read_4_bytes (dbfd, |
| 12670 | dwp_htab->section_pool.v2.sizes |
| 12671 | + (((unit_index - 1) * dwp_htab->nr_columns |
| 12672 | + i) |
| 12673 | * sizeof (uint32_t))); |
| 12674 | |
| 12675 | switch (dwp_htab->section_pool.v2.section_ids[i]) |
| 12676 | { |
| 12677 | case DW_SECT_INFO: |
| 12678 | case DW_SECT_TYPES: |
| 12679 | sections.info_or_types_offset = offset; |
| 12680 | sections.info_or_types_size = size; |
| 12681 | break; |
| 12682 | case DW_SECT_ABBREV: |
| 12683 | sections.abbrev_offset = offset; |
| 12684 | sections.abbrev_size = size; |
| 12685 | break; |
| 12686 | case DW_SECT_LINE: |
| 12687 | sections.line_offset = offset; |
| 12688 | sections.line_size = size; |
| 12689 | break; |
| 12690 | case DW_SECT_LOC: |
| 12691 | sections.loc_offset = offset; |
| 12692 | sections.loc_size = size; |
| 12693 | break; |
| 12694 | case DW_SECT_STR_OFFSETS: |
| 12695 | sections.str_offsets_offset = offset; |
| 12696 | sections.str_offsets_size = size; |
| 12697 | break; |
| 12698 | case DW_SECT_MACINFO: |
| 12699 | sections.macinfo_offset = offset; |
| 12700 | sections.macinfo_size = size; |
| 12701 | break; |
| 12702 | case DW_SECT_MACRO: |
| 12703 | sections.macro_offset = offset; |
| 12704 | sections.macro_size = size; |
| 12705 | break; |
| 12706 | } |
| 12707 | } |
| 12708 | |
| 12709 | /* It's easier for the rest of the code if we fake a struct dwo_file and |
| 12710 | have dwo_unit "live" in that. At least for now. |
| 12711 | |
| 12712 | The DWP file can be made up of a random collection of CUs and TUs. |
| 12713 | However, for each CU + set of TUs that came from the same original DWO |
| 12714 | file, we can combine them back into a virtual DWO file to save space |
| 12715 | (fewer struct dwo_file objects to allocate). Remember that for really |
| 12716 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ |
| 12717 | |
| 12718 | std::string virtual_dwo_name = |
| 12719 | string_printf ("virtual-dwo/%ld-%ld-%ld-%ld", |
| 12720 | (long) (sections.abbrev_size ? sections.abbrev_offset : 0), |
| 12721 | (long) (sections.line_size ? sections.line_offset : 0), |
| 12722 | (long) (sections.loc_size ? sections.loc_offset : 0), |
| 12723 | (long) (sections.str_offsets_size |
| 12724 | ? sections.str_offsets_offset : 0)); |
| 12725 | /* Can we use an existing virtual DWO file? */ |
| 12726 | dwo_file_slot = lookup_dwo_file_slot (dwarf2_per_objfile, |
| 12727 | virtual_dwo_name.c_str (), |
| 12728 | comp_dir); |
| 12729 | /* Create one if necessary. */ |
| 12730 | if (*dwo_file_slot == NULL) |
| 12731 | { |
| 12732 | if (dwarf_read_debug) |
| 12733 | { |
| 12734 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", |
| 12735 | virtual_dwo_name.c_str ()); |
| 12736 | } |
| 12737 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); |
| 12738 | dwo_file->dwo_name |
| 12739 | = (const char *) obstack_copy0 (&objfile->objfile_obstack, |
| 12740 | virtual_dwo_name.c_str (), |
| 12741 | virtual_dwo_name.size ()); |
| 12742 | dwo_file->comp_dir = comp_dir; |
| 12743 | dwo_file->sections.abbrev = |
| 12744 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.abbrev, |
| 12745 | sections.abbrev_offset, sections.abbrev_size); |
| 12746 | dwo_file->sections.line = |
| 12747 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.line, |
| 12748 | sections.line_offset, sections.line_size); |
| 12749 | dwo_file->sections.loc = |
| 12750 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.loc, |
| 12751 | sections.loc_offset, sections.loc_size); |
| 12752 | dwo_file->sections.macinfo = |
| 12753 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.macinfo, |
| 12754 | sections.macinfo_offset, sections.macinfo_size); |
| 12755 | dwo_file->sections.macro = |
| 12756 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.macro, |
| 12757 | sections.macro_offset, sections.macro_size); |
| 12758 | dwo_file->sections.str_offsets = |
| 12759 | create_dwp_v2_section (dwarf2_per_objfile, |
| 12760 | &dwp_file->sections.str_offsets, |
| 12761 | sections.str_offsets_offset, |
| 12762 | sections.str_offsets_size); |
| 12763 | /* The "str" section is global to the entire DWP file. */ |
| 12764 | dwo_file->sections.str = dwp_file->sections.str; |
| 12765 | /* The info or types section is assigned below to dwo_unit, |
| 12766 | there's no need to record it in dwo_file. |
| 12767 | Also, we can't simply record type sections in dwo_file because |
| 12768 | we record a pointer into the vector in dwo_unit. As we collect more |
| 12769 | types we'll grow the vector and eventually have to reallocate space |
| 12770 | for it, invalidating all copies of pointers into the previous |
| 12771 | contents. */ |
| 12772 | *dwo_file_slot = dwo_file; |
| 12773 | } |
| 12774 | else |
| 12775 | { |
| 12776 | if (dwarf_read_debug) |
| 12777 | { |
| 12778 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", |
| 12779 | virtual_dwo_name.c_str ()); |
| 12780 | } |
| 12781 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
| 12782 | } |
| 12783 | |
| 12784 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); |
| 12785 | dwo_unit->dwo_file = dwo_file; |
| 12786 | dwo_unit->signature = signature; |
| 12787 | dwo_unit->section = |
| 12788 | XOBNEW (&objfile->objfile_obstack, struct dwarf2_section_info); |
| 12789 | *dwo_unit->section = create_dwp_v2_section (dwarf2_per_objfile, |
| 12790 | is_debug_types |
| 12791 | ? &dwp_file->sections.types |
| 12792 | : &dwp_file->sections.info, |
| 12793 | sections.info_or_types_offset, |
| 12794 | sections.info_or_types_size); |
| 12795 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ |
| 12796 | |
| 12797 | return dwo_unit; |
| 12798 | } |
| 12799 | |
| 12800 | /* Lookup the DWO unit with SIGNATURE in DWP_FILE. |
| 12801 | Returns NULL if the signature isn't found. */ |
| 12802 | |
| 12803 | static struct dwo_unit * |
| 12804 | lookup_dwo_unit_in_dwp (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 12805 | struct dwp_file *dwp_file, const char *comp_dir, |
| 12806 | ULONGEST signature, int is_debug_types) |
| 12807 | { |
| 12808 | const struct dwp_hash_table *dwp_htab = |
| 12809 | is_debug_types ? dwp_file->tus : dwp_file->cus; |
| 12810 | bfd *dbfd = dwp_file->dbfd; |
| 12811 | uint32_t mask = dwp_htab->nr_slots - 1; |
| 12812 | uint32_t hash = signature & mask; |
| 12813 | uint32_t hash2 = ((signature >> 32) & mask) | 1; |
| 12814 | unsigned int i; |
| 12815 | void **slot; |
| 12816 | struct dwo_unit find_dwo_cu; |
| 12817 | |
| 12818 | memset (&find_dwo_cu, 0, sizeof (find_dwo_cu)); |
| 12819 | find_dwo_cu.signature = signature; |
| 12820 | slot = htab_find_slot (is_debug_types |
| 12821 | ? dwp_file->loaded_tus |
| 12822 | : dwp_file->loaded_cus, |
| 12823 | &find_dwo_cu, INSERT); |
| 12824 | |
| 12825 | if (*slot != NULL) |
| 12826 | return (struct dwo_unit *) *slot; |
| 12827 | |
| 12828 | /* Use a for loop so that we don't loop forever on bad debug info. */ |
| 12829 | for (i = 0; i < dwp_htab->nr_slots; ++i) |
| 12830 | { |
| 12831 | ULONGEST signature_in_table; |
| 12832 | |
| 12833 | signature_in_table = |
| 12834 | read_8_bytes (dbfd, dwp_htab->hash_table + hash * sizeof (uint64_t)); |
| 12835 | if (signature_in_table == signature) |
| 12836 | { |
| 12837 | uint32_t unit_index = |
| 12838 | read_4_bytes (dbfd, |
| 12839 | dwp_htab->unit_table + hash * sizeof (uint32_t)); |
| 12840 | |
| 12841 | if (dwp_file->version == 1) |
| 12842 | { |
| 12843 | *slot = create_dwo_unit_in_dwp_v1 (dwarf2_per_objfile, |
| 12844 | dwp_file, unit_index, |
| 12845 | comp_dir, signature, |
| 12846 | is_debug_types); |
| 12847 | } |
| 12848 | else |
| 12849 | { |
| 12850 | *slot = create_dwo_unit_in_dwp_v2 (dwarf2_per_objfile, |
| 12851 | dwp_file, unit_index, |
| 12852 | comp_dir, signature, |
| 12853 | is_debug_types); |
| 12854 | } |
| 12855 | return (struct dwo_unit *) *slot; |
| 12856 | } |
| 12857 | if (signature_in_table == 0) |
| 12858 | return NULL; |
| 12859 | hash = (hash + hash2) & mask; |
| 12860 | } |
| 12861 | |
| 12862 | error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate" |
| 12863 | " [in module %s]"), |
| 12864 | dwp_file->name); |
| 12865 | } |
| 12866 | |
| 12867 | /* Subroutine of open_dwo_file,open_dwp_file to simplify them. |
| 12868 | Open the file specified by FILE_NAME and hand it off to BFD for |
| 12869 | preliminary analysis. Return a newly initialized bfd *, which |
| 12870 | includes a canonicalized copy of FILE_NAME. |
| 12871 | If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file. |
| 12872 | SEARCH_CWD is true if the current directory is to be searched. |
| 12873 | It will be searched before debug-file-directory. |
| 12874 | If successful, the file is added to the bfd include table of the |
| 12875 | objfile's bfd (see gdb_bfd_record_inclusion). |
| 12876 | If unable to find/open the file, return NULL. |
| 12877 | NOTE: This function is derived from symfile_bfd_open. */ |
| 12878 | |
| 12879 | static gdb_bfd_ref_ptr |
| 12880 | try_open_dwop_file (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 12881 | const char *file_name, int is_dwp, int search_cwd) |
| 12882 | { |
| 12883 | int desc; |
| 12884 | char *absolute_name; |
| 12885 | /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if |
| 12886 | FILE_NAME contains a '/'. So we can't use it. Instead prepend "." |
| 12887 | to debug_file_directory. */ |
| 12888 | char *search_path; |
| 12889 | static const char dirname_separator_string[] = { DIRNAME_SEPARATOR, '\0' }; |
| 12890 | |
| 12891 | if (search_cwd) |
| 12892 | { |
| 12893 | if (*debug_file_directory != '\0') |
| 12894 | search_path = concat (".", dirname_separator_string, |
| 12895 | debug_file_directory, (char *) NULL); |
| 12896 | else |
| 12897 | search_path = xstrdup ("."); |
| 12898 | } |
| 12899 | else |
| 12900 | search_path = xstrdup (debug_file_directory); |
| 12901 | |
| 12902 | openp_flags flags = OPF_RETURN_REALPATH; |
| 12903 | if (is_dwp) |
| 12904 | flags |= OPF_SEARCH_IN_PATH; |
| 12905 | desc = openp (search_path, flags, file_name, |
| 12906 | O_RDONLY | O_BINARY, &absolute_name); |
| 12907 | xfree (search_path); |
| 12908 | if (desc < 0) |
| 12909 | return NULL; |
| 12910 | |
| 12911 | gdb_bfd_ref_ptr sym_bfd (gdb_bfd_open (absolute_name, gnutarget, desc)); |
| 12912 | xfree (absolute_name); |
| 12913 | if (sym_bfd == NULL) |
| 12914 | return NULL; |
| 12915 | bfd_set_cacheable (sym_bfd.get (), 1); |
| 12916 | |
| 12917 | if (!bfd_check_format (sym_bfd.get (), bfd_object)) |
| 12918 | return NULL; |
| 12919 | |
| 12920 | /* Success. Record the bfd as having been included by the objfile's bfd. |
| 12921 | This is important because things like demangled_names_hash lives in the |
| 12922 | objfile's per_bfd space and may have references to things like symbol |
| 12923 | names that live in the DWO/DWP file's per_bfd space. PR 16426. */ |
| 12924 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, sym_bfd.get ()); |
| 12925 | |
| 12926 | return sym_bfd; |
| 12927 | } |
| 12928 | |
| 12929 | /* Try to open DWO file FILE_NAME. |
| 12930 | COMP_DIR is the DW_AT_comp_dir attribute. |
| 12931 | The result is the bfd handle of the file. |
| 12932 | If there is a problem finding or opening the file, return NULL. |
| 12933 | Upon success, the canonicalized path of the file is stored in the bfd, |
| 12934 | same as symfile_bfd_open. */ |
| 12935 | |
| 12936 | static gdb_bfd_ref_ptr |
| 12937 | open_dwo_file (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 12938 | const char *file_name, const char *comp_dir) |
| 12939 | { |
| 12940 | if (IS_ABSOLUTE_PATH (file_name)) |
| 12941 | return try_open_dwop_file (dwarf2_per_objfile, file_name, |
| 12942 | 0 /*is_dwp*/, 0 /*search_cwd*/); |
| 12943 | |
| 12944 | /* Before trying the search path, try DWO_NAME in COMP_DIR. */ |
| 12945 | |
| 12946 | if (comp_dir != NULL) |
| 12947 | { |
| 12948 | char *path_to_try = concat (comp_dir, SLASH_STRING, |
| 12949 | file_name, (char *) NULL); |
| 12950 | |
| 12951 | /* NOTE: If comp_dir is a relative path, this will also try the |
| 12952 | search path, which seems useful. */ |
| 12953 | gdb_bfd_ref_ptr abfd (try_open_dwop_file (dwarf2_per_objfile, |
| 12954 | path_to_try, |
| 12955 | 0 /*is_dwp*/, |
| 12956 | 1 /*search_cwd*/)); |
| 12957 | xfree (path_to_try); |
| 12958 | if (abfd != NULL) |
| 12959 | return abfd; |
| 12960 | } |
| 12961 | |
| 12962 | /* That didn't work, try debug-file-directory, which, despite its name, |
| 12963 | is a list of paths. */ |
| 12964 | |
| 12965 | if (*debug_file_directory == '\0') |
| 12966 | return NULL; |
| 12967 | |
| 12968 | return try_open_dwop_file (dwarf2_per_objfile, file_name, |
| 12969 | 0 /*is_dwp*/, 1 /*search_cwd*/); |
| 12970 | } |
| 12971 | |
| 12972 | /* This function is mapped across the sections and remembers the offset and |
| 12973 | size of each of the DWO debugging sections we are interested in. */ |
| 12974 | |
| 12975 | static void |
| 12976 | dwarf2_locate_dwo_sections (bfd *abfd, asection *sectp, void *dwo_sections_ptr) |
| 12977 | { |
| 12978 | struct dwo_sections *dwo_sections = (struct dwo_sections *) dwo_sections_ptr; |
| 12979 | const struct dwop_section_names *names = &dwop_section_names; |
| 12980 | |
| 12981 | if (section_is_p (sectp->name, &names->abbrev_dwo)) |
| 12982 | { |
| 12983 | dwo_sections->abbrev.s.section = sectp; |
| 12984 | dwo_sections->abbrev.size = bfd_get_section_size (sectp); |
| 12985 | } |
| 12986 | else if (section_is_p (sectp->name, &names->info_dwo)) |
| 12987 | { |
| 12988 | dwo_sections->info.s.section = sectp; |
| 12989 | dwo_sections->info.size = bfd_get_section_size (sectp); |
| 12990 | } |
| 12991 | else if (section_is_p (sectp->name, &names->line_dwo)) |
| 12992 | { |
| 12993 | dwo_sections->line.s.section = sectp; |
| 12994 | dwo_sections->line.size = bfd_get_section_size (sectp); |
| 12995 | } |
| 12996 | else if (section_is_p (sectp->name, &names->loc_dwo)) |
| 12997 | { |
| 12998 | dwo_sections->loc.s.section = sectp; |
| 12999 | dwo_sections->loc.size = bfd_get_section_size (sectp); |
| 13000 | } |
| 13001 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) |
| 13002 | { |
| 13003 | dwo_sections->macinfo.s.section = sectp; |
| 13004 | dwo_sections->macinfo.size = bfd_get_section_size (sectp); |
| 13005 | } |
| 13006 | else if (section_is_p (sectp->name, &names->macro_dwo)) |
| 13007 | { |
| 13008 | dwo_sections->macro.s.section = sectp; |
| 13009 | dwo_sections->macro.size = bfd_get_section_size (sectp); |
| 13010 | } |
| 13011 | else if (section_is_p (sectp->name, &names->str_dwo)) |
| 13012 | { |
| 13013 | dwo_sections->str.s.section = sectp; |
| 13014 | dwo_sections->str.size = bfd_get_section_size (sectp); |
| 13015 | } |
| 13016 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) |
| 13017 | { |
| 13018 | dwo_sections->str_offsets.s.section = sectp; |
| 13019 | dwo_sections->str_offsets.size = bfd_get_section_size (sectp); |
| 13020 | } |
| 13021 | else if (section_is_p (sectp->name, &names->types_dwo)) |
| 13022 | { |
| 13023 | struct dwarf2_section_info type_section; |
| 13024 | |
| 13025 | memset (&type_section, 0, sizeof (type_section)); |
| 13026 | type_section.s.section = sectp; |
| 13027 | type_section.size = bfd_get_section_size (sectp); |
| 13028 | VEC_safe_push (dwarf2_section_info_def, dwo_sections->types, |
| 13029 | &type_section); |
| 13030 | } |
| 13031 | } |
| 13032 | |
| 13033 | /* Initialize the use of the DWO file specified by DWO_NAME and referenced |
| 13034 | by PER_CU. This is for the non-DWP case. |
| 13035 | The result is NULL if DWO_NAME can't be found. */ |
| 13036 | |
| 13037 | static struct dwo_file * |
| 13038 | open_and_init_dwo_file (struct dwarf2_per_cu_data *per_cu, |
| 13039 | const char *dwo_name, const char *comp_dir) |
| 13040 | { |
| 13041 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
| 13042 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 13043 | struct dwo_file *dwo_file; |
| 13044 | struct cleanup *cleanups; |
| 13045 | |
| 13046 | gdb_bfd_ref_ptr dbfd (open_dwo_file (dwarf2_per_objfile, dwo_name, comp_dir)); |
| 13047 | if (dbfd == NULL) |
| 13048 | { |
| 13049 | if (dwarf_read_debug) |
| 13050 | fprintf_unfiltered (gdb_stdlog, "DWO file not found: %s\n", dwo_name); |
| 13051 | return NULL; |
| 13052 | } |
| 13053 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); |
| 13054 | dwo_file->dwo_name = dwo_name; |
| 13055 | dwo_file->comp_dir = comp_dir; |
| 13056 | dwo_file->dbfd = dbfd.release (); |
| 13057 | |
| 13058 | free_dwo_file_cleanup_data *cleanup_data = XNEW (free_dwo_file_cleanup_data); |
| 13059 | cleanup_data->dwo_file = dwo_file; |
| 13060 | cleanup_data->dwarf2_per_objfile = dwarf2_per_objfile; |
| 13061 | |
| 13062 | cleanups = make_cleanup (free_dwo_file_cleanup, cleanup_data); |
| 13063 | |
| 13064 | bfd_map_over_sections (dwo_file->dbfd, dwarf2_locate_dwo_sections, |
| 13065 | &dwo_file->sections); |
| 13066 | |
| 13067 | create_cus_hash_table (dwarf2_per_objfile, *dwo_file, dwo_file->sections.info, |
| 13068 | dwo_file->cus); |
| 13069 | |
| 13070 | create_debug_types_hash_table (dwarf2_per_objfile, dwo_file, |
| 13071 | dwo_file->sections.types, dwo_file->tus); |
| 13072 | |
| 13073 | discard_cleanups (cleanups); |
| 13074 | |
| 13075 | if (dwarf_read_debug) |
| 13076 | fprintf_unfiltered (gdb_stdlog, "DWO file found: %s\n", dwo_name); |
| 13077 | |
| 13078 | return dwo_file; |
| 13079 | } |
| 13080 | |
| 13081 | /* This function is mapped across the sections and remembers the offset and |
| 13082 | size of each of the DWP debugging sections common to version 1 and 2 that |
| 13083 | we are interested in. */ |
| 13084 | |
| 13085 | static void |
| 13086 | dwarf2_locate_common_dwp_sections (bfd *abfd, asection *sectp, |
| 13087 | void *dwp_file_ptr) |
| 13088 | { |
| 13089 | struct dwp_file *dwp_file = (struct dwp_file *) dwp_file_ptr; |
| 13090 | const struct dwop_section_names *names = &dwop_section_names; |
| 13091 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; |
| 13092 | |
| 13093 | /* Record the ELF section number for later lookup: this is what the |
| 13094 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ |
| 13095 | gdb_assert (elf_section_nr < dwp_file->num_sections); |
| 13096 | dwp_file->elf_sections[elf_section_nr] = sectp; |
| 13097 | |
| 13098 | /* Look for specific sections that we need. */ |
| 13099 | if (section_is_p (sectp->name, &names->str_dwo)) |
| 13100 | { |
| 13101 | dwp_file->sections.str.s.section = sectp; |
| 13102 | dwp_file->sections.str.size = bfd_get_section_size (sectp); |
| 13103 | } |
| 13104 | else if (section_is_p (sectp->name, &names->cu_index)) |
| 13105 | { |
| 13106 | dwp_file->sections.cu_index.s.section = sectp; |
| 13107 | dwp_file->sections.cu_index.size = bfd_get_section_size (sectp); |
| 13108 | } |
| 13109 | else if (section_is_p (sectp->name, &names->tu_index)) |
| 13110 | { |
| 13111 | dwp_file->sections.tu_index.s.section = sectp; |
| 13112 | dwp_file->sections.tu_index.size = bfd_get_section_size (sectp); |
| 13113 | } |
| 13114 | } |
| 13115 | |
| 13116 | /* This function is mapped across the sections and remembers the offset and |
| 13117 | size of each of the DWP version 2 debugging sections that we are interested |
| 13118 | in. This is split into a separate function because we don't know if we |
| 13119 | have version 1 or 2 until we parse the cu_index/tu_index sections. */ |
| 13120 | |
| 13121 | static void |
| 13122 | dwarf2_locate_v2_dwp_sections (bfd *abfd, asection *sectp, void *dwp_file_ptr) |
| 13123 | { |
| 13124 | struct dwp_file *dwp_file = (struct dwp_file *) dwp_file_ptr; |
| 13125 | const struct dwop_section_names *names = &dwop_section_names; |
| 13126 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; |
| 13127 | |
| 13128 | /* Record the ELF section number for later lookup: this is what the |
| 13129 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ |
| 13130 | gdb_assert (elf_section_nr < dwp_file->num_sections); |
| 13131 | dwp_file->elf_sections[elf_section_nr] = sectp; |
| 13132 | |
| 13133 | /* Look for specific sections that we need. */ |
| 13134 | if (section_is_p (sectp->name, &names->abbrev_dwo)) |
| 13135 | { |
| 13136 | dwp_file->sections.abbrev.s.section = sectp; |
| 13137 | dwp_file->sections.abbrev.size = bfd_get_section_size (sectp); |
| 13138 | } |
| 13139 | else if (section_is_p (sectp->name, &names->info_dwo)) |
| 13140 | { |
| 13141 | dwp_file->sections.info.s.section = sectp; |
| 13142 | dwp_file->sections.info.size = bfd_get_section_size (sectp); |
| 13143 | } |
| 13144 | else if (section_is_p (sectp->name, &names->line_dwo)) |
| 13145 | { |
| 13146 | dwp_file->sections.line.s.section = sectp; |
| 13147 | dwp_file->sections.line.size = bfd_get_section_size (sectp); |
| 13148 | } |
| 13149 | else if (section_is_p (sectp->name, &names->loc_dwo)) |
| 13150 | { |
| 13151 | dwp_file->sections.loc.s.section = sectp; |
| 13152 | dwp_file->sections.loc.size = bfd_get_section_size (sectp); |
| 13153 | } |
| 13154 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) |
| 13155 | { |
| 13156 | dwp_file->sections.macinfo.s.section = sectp; |
| 13157 | dwp_file->sections.macinfo.size = bfd_get_section_size (sectp); |
| 13158 | } |
| 13159 | else if (section_is_p (sectp->name, &names->macro_dwo)) |
| 13160 | { |
| 13161 | dwp_file->sections.macro.s.section = sectp; |
| 13162 | dwp_file->sections.macro.size = bfd_get_section_size (sectp); |
| 13163 | } |
| 13164 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) |
| 13165 | { |
| 13166 | dwp_file->sections.str_offsets.s.section = sectp; |
| 13167 | dwp_file->sections.str_offsets.size = bfd_get_section_size (sectp); |
| 13168 | } |
| 13169 | else if (section_is_p (sectp->name, &names->types_dwo)) |
| 13170 | { |
| 13171 | dwp_file->sections.types.s.section = sectp; |
| 13172 | dwp_file->sections.types.size = bfd_get_section_size (sectp); |
| 13173 | } |
| 13174 | } |
| 13175 | |
| 13176 | /* Hash function for dwp_file loaded CUs/TUs. */ |
| 13177 | |
| 13178 | static hashval_t |
| 13179 | hash_dwp_loaded_cutus (const void *item) |
| 13180 | { |
| 13181 | const struct dwo_unit *dwo_unit = (const struct dwo_unit *) item; |
| 13182 | |
| 13183 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
| 13184 | return dwo_unit->signature; |
| 13185 | } |
| 13186 | |
| 13187 | /* Equality function for dwp_file loaded CUs/TUs. */ |
| 13188 | |
| 13189 | static int |
| 13190 | eq_dwp_loaded_cutus (const void *a, const void *b) |
| 13191 | { |
| 13192 | const struct dwo_unit *dua = (const struct dwo_unit *) a; |
| 13193 | const struct dwo_unit *dub = (const struct dwo_unit *) b; |
| 13194 | |
| 13195 | return dua->signature == dub->signature; |
| 13196 | } |
| 13197 | |
| 13198 | /* Allocate a hash table for dwp_file loaded CUs/TUs. */ |
| 13199 | |
| 13200 | static htab_t |
| 13201 | allocate_dwp_loaded_cutus_table (struct objfile *objfile) |
| 13202 | { |
| 13203 | return htab_create_alloc_ex (3, |
| 13204 | hash_dwp_loaded_cutus, |
| 13205 | eq_dwp_loaded_cutus, |
| 13206 | NULL, |
| 13207 | &objfile->objfile_obstack, |
| 13208 | hashtab_obstack_allocate, |
| 13209 | dummy_obstack_deallocate); |
| 13210 | } |
| 13211 | |
| 13212 | /* Try to open DWP file FILE_NAME. |
| 13213 | The result is the bfd handle of the file. |
| 13214 | If there is a problem finding or opening the file, return NULL. |
| 13215 | Upon success, the canonicalized path of the file is stored in the bfd, |
| 13216 | same as symfile_bfd_open. */ |
| 13217 | |
| 13218 | static gdb_bfd_ref_ptr |
| 13219 | open_dwp_file (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 13220 | const char *file_name) |
| 13221 | { |
| 13222 | gdb_bfd_ref_ptr abfd (try_open_dwop_file (dwarf2_per_objfile, file_name, |
| 13223 | 1 /*is_dwp*/, |
| 13224 | 1 /*search_cwd*/)); |
| 13225 | if (abfd != NULL) |
| 13226 | return abfd; |
| 13227 | |
| 13228 | /* Work around upstream bug 15652. |
| 13229 | http://sourceware.org/bugzilla/show_bug.cgi?id=15652 |
| 13230 | [Whether that's a "bug" is debatable, but it is getting in our way.] |
| 13231 | We have no real idea where the dwp file is, because gdb's realpath-ing |
| 13232 | of the executable's path may have discarded the needed info. |
| 13233 | [IWBN if the dwp file name was recorded in the executable, akin to |
| 13234 | .gnu_debuglink, but that doesn't exist yet.] |
| 13235 | Strip the directory from FILE_NAME and search again. */ |
| 13236 | if (*debug_file_directory != '\0') |
| 13237 | { |
| 13238 | /* Don't implicitly search the current directory here. |
| 13239 | If the user wants to search "." to handle this case, |
| 13240 | it must be added to debug-file-directory. */ |
| 13241 | return try_open_dwop_file (dwarf2_per_objfile, |
| 13242 | lbasename (file_name), 1 /*is_dwp*/, |
| 13243 | 0 /*search_cwd*/); |
| 13244 | } |
| 13245 | |
| 13246 | return NULL; |
| 13247 | } |
| 13248 | |
| 13249 | /* Initialize the use of the DWP file for the current objfile. |
| 13250 | By convention the name of the DWP file is ${objfile}.dwp. |
| 13251 | The result is NULL if it can't be found. */ |
| 13252 | |
| 13253 | static struct dwp_file * |
| 13254 | open_and_init_dwp_file (struct dwarf2_per_objfile *dwarf2_per_objfile) |
| 13255 | { |
| 13256 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 13257 | struct dwp_file *dwp_file; |
| 13258 | |
| 13259 | /* Try to find first .dwp for the binary file before any symbolic links |
| 13260 | resolving. */ |
| 13261 | |
| 13262 | /* If the objfile is a debug file, find the name of the real binary |
| 13263 | file and get the name of dwp file from there. */ |
| 13264 | std::string dwp_name; |
| 13265 | if (objfile->separate_debug_objfile_backlink != NULL) |
| 13266 | { |
| 13267 | struct objfile *backlink = objfile->separate_debug_objfile_backlink; |
| 13268 | const char *backlink_basename = lbasename (backlink->original_name); |
| 13269 | |
| 13270 | dwp_name = ldirname (objfile->original_name) + SLASH_STRING + backlink_basename; |
| 13271 | } |
| 13272 | else |
| 13273 | dwp_name = objfile->original_name; |
| 13274 | |
| 13275 | dwp_name += ".dwp"; |
| 13276 | |
| 13277 | gdb_bfd_ref_ptr dbfd (open_dwp_file (dwarf2_per_objfile, dwp_name.c_str ())); |
| 13278 | if (dbfd == NULL |
| 13279 | && strcmp (objfile->original_name, objfile_name (objfile)) != 0) |
| 13280 | { |
| 13281 | /* Try to find .dwp for the binary file after gdb_realpath resolving. */ |
| 13282 | dwp_name = objfile_name (objfile); |
| 13283 | dwp_name += ".dwp"; |
| 13284 | dbfd = open_dwp_file (dwarf2_per_objfile, dwp_name.c_str ()); |
| 13285 | } |
| 13286 | |
| 13287 | if (dbfd == NULL) |
| 13288 | { |
| 13289 | if (dwarf_read_debug) |
| 13290 | fprintf_unfiltered (gdb_stdlog, "DWP file not found: %s\n", dwp_name.c_str ()); |
| 13291 | return NULL; |
| 13292 | } |
| 13293 | dwp_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_file); |
| 13294 | dwp_file->name = bfd_get_filename (dbfd.get ()); |
| 13295 | dwp_file->dbfd = dbfd.release (); |
| 13296 | |
| 13297 | /* +1: section 0 is unused */ |
| 13298 | dwp_file->num_sections = bfd_count_sections (dwp_file->dbfd) + 1; |
| 13299 | dwp_file->elf_sections = |
| 13300 | OBSTACK_CALLOC (&objfile->objfile_obstack, |
| 13301 | dwp_file->num_sections, asection *); |
| 13302 | |
| 13303 | bfd_map_over_sections (dwp_file->dbfd, dwarf2_locate_common_dwp_sections, |
| 13304 | dwp_file); |
| 13305 | |
| 13306 | dwp_file->cus = create_dwp_hash_table (dwarf2_per_objfile, dwp_file, 0); |
| 13307 | |
| 13308 | dwp_file->tus = create_dwp_hash_table (dwarf2_per_objfile, dwp_file, 1); |
| 13309 | |
| 13310 | /* The DWP file version is stored in the hash table. Oh well. */ |
| 13311 | if (dwp_file->cus && dwp_file->tus |
| 13312 | && dwp_file->cus->version != dwp_file->tus->version) |
| 13313 | { |
| 13314 | /* Technically speaking, we should try to limp along, but this is |
| 13315 | pretty bizarre. We use pulongest here because that's the established |
| 13316 | portability solution (e.g, we cannot use %u for uint32_t). */ |
| 13317 | error (_("Dwarf Error: DWP file CU version %s doesn't match" |
| 13318 | " TU version %s [in DWP file %s]"), |
| 13319 | pulongest (dwp_file->cus->version), |
| 13320 | pulongest (dwp_file->tus->version), dwp_name.c_str ()); |
| 13321 | } |
| 13322 | |
| 13323 | if (dwp_file->cus) |
| 13324 | dwp_file->version = dwp_file->cus->version; |
| 13325 | else if (dwp_file->tus) |
| 13326 | dwp_file->version = dwp_file->tus->version; |
| 13327 | else |
| 13328 | dwp_file->version = 2; |
| 13329 | |
| 13330 | if (dwp_file->version == 2) |
| 13331 | bfd_map_over_sections (dwp_file->dbfd, dwarf2_locate_v2_dwp_sections, |
| 13332 | dwp_file); |
| 13333 | |
| 13334 | dwp_file->loaded_cus = allocate_dwp_loaded_cutus_table (objfile); |
| 13335 | dwp_file->loaded_tus = allocate_dwp_loaded_cutus_table (objfile); |
| 13336 | |
| 13337 | if (dwarf_read_debug) |
| 13338 | { |
| 13339 | fprintf_unfiltered (gdb_stdlog, "DWP file found: %s\n", dwp_file->name); |
| 13340 | fprintf_unfiltered (gdb_stdlog, |
| 13341 | " %s CUs, %s TUs\n", |
| 13342 | pulongest (dwp_file->cus ? dwp_file->cus->nr_units : 0), |
| 13343 | pulongest (dwp_file->tus ? dwp_file->tus->nr_units : 0)); |
| 13344 | } |
| 13345 | |
| 13346 | return dwp_file; |
| 13347 | } |
| 13348 | |
| 13349 | /* Wrapper around open_and_init_dwp_file, only open it once. */ |
| 13350 | |
| 13351 | static struct dwp_file * |
| 13352 | get_dwp_file (struct dwarf2_per_objfile *dwarf2_per_objfile) |
| 13353 | { |
| 13354 | if (! dwarf2_per_objfile->dwp_checked) |
| 13355 | { |
| 13356 | dwarf2_per_objfile->dwp_file |
| 13357 | = open_and_init_dwp_file (dwarf2_per_objfile); |
| 13358 | dwarf2_per_objfile->dwp_checked = 1; |
| 13359 | } |
| 13360 | return dwarf2_per_objfile->dwp_file; |
| 13361 | } |
| 13362 | |
| 13363 | /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit. |
| 13364 | Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME |
| 13365 | or in the DWP file for the objfile, referenced by THIS_UNIT. |
| 13366 | If non-NULL, comp_dir is the DW_AT_comp_dir attribute. |
| 13367 | IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU. |
| 13368 | |
| 13369 | This is called, for example, when wanting to read a variable with a |
| 13370 | complex location. Therefore we don't want to do file i/o for every call. |
| 13371 | Therefore we don't want to look for a DWO file on every call. |
| 13372 | Therefore we first see if we've already seen SIGNATURE in a DWP file, |
| 13373 | then we check if we've already seen DWO_NAME, and only THEN do we check |
| 13374 | for a DWO file. |
| 13375 | |
| 13376 | The result is a pointer to the dwo_unit object or NULL if we didn't find it |
| 13377 | (dwo_id mismatch or couldn't find the DWO/DWP file). */ |
| 13378 | |
| 13379 | static struct dwo_unit * |
| 13380 | lookup_dwo_cutu (struct dwarf2_per_cu_data *this_unit, |
| 13381 | const char *dwo_name, const char *comp_dir, |
| 13382 | ULONGEST signature, int is_debug_types) |
| 13383 | { |
| 13384 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_unit->dwarf2_per_objfile; |
| 13385 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 13386 | const char *kind = is_debug_types ? "TU" : "CU"; |
| 13387 | void **dwo_file_slot; |
| 13388 | struct dwo_file *dwo_file; |
| 13389 | struct dwp_file *dwp_file; |
| 13390 | |
| 13391 | /* First see if there's a DWP file. |
| 13392 | If we have a DWP file but didn't find the DWO inside it, don't |
| 13393 | look for the original DWO file. It makes gdb behave differently |
| 13394 | depending on whether one is debugging in the build tree. */ |
| 13395 | |
| 13396 | dwp_file = get_dwp_file (dwarf2_per_objfile); |
| 13397 | if (dwp_file != NULL) |
| 13398 | { |
| 13399 | const struct dwp_hash_table *dwp_htab = |
| 13400 | is_debug_types ? dwp_file->tus : dwp_file->cus; |
| 13401 | |
| 13402 | if (dwp_htab != NULL) |
| 13403 | { |
| 13404 | struct dwo_unit *dwo_cutu = |
| 13405 | lookup_dwo_unit_in_dwp (dwarf2_per_objfile, dwp_file, comp_dir, |
| 13406 | signature, is_debug_types); |
| 13407 | |
| 13408 | if (dwo_cutu != NULL) |
| 13409 | { |
| 13410 | if (dwarf_read_debug) |
| 13411 | { |
| 13412 | fprintf_unfiltered (gdb_stdlog, |
| 13413 | "Virtual DWO %s %s found: @%s\n", |
| 13414 | kind, hex_string (signature), |
| 13415 | host_address_to_string (dwo_cutu)); |
| 13416 | } |
| 13417 | return dwo_cutu; |
| 13418 | } |
| 13419 | } |
| 13420 | } |
| 13421 | else |
| 13422 | { |
| 13423 | /* No DWP file, look for the DWO file. */ |
| 13424 | |
| 13425 | dwo_file_slot = lookup_dwo_file_slot (dwarf2_per_objfile, |
| 13426 | dwo_name, comp_dir); |
| 13427 | if (*dwo_file_slot == NULL) |
| 13428 | { |
| 13429 | /* Read in the file and build a table of the CUs/TUs it contains. */ |
| 13430 | *dwo_file_slot = open_and_init_dwo_file (this_unit, dwo_name, comp_dir); |
| 13431 | } |
| 13432 | /* NOTE: This will be NULL if unable to open the file. */ |
| 13433 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
| 13434 | |
| 13435 | if (dwo_file != NULL) |
| 13436 | { |
| 13437 | struct dwo_unit *dwo_cutu = NULL; |
| 13438 | |
| 13439 | if (is_debug_types && dwo_file->tus) |
| 13440 | { |
| 13441 | struct dwo_unit find_dwo_cutu; |
| 13442 | |
| 13443 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); |
| 13444 | find_dwo_cutu.signature = signature; |
| 13445 | dwo_cutu |
| 13446 | = (struct dwo_unit *) htab_find (dwo_file->tus, &find_dwo_cutu); |
| 13447 | } |
| 13448 | else if (!is_debug_types && dwo_file->cus) |
| 13449 | { |
| 13450 | struct dwo_unit find_dwo_cutu; |
| 13451 | |
| 13452 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); |
| 13453 | find_dwo_cutu.signature = signature; |
| 13454 | dwo_cutu = (struct dwo_unit *)htab_find (dwo_file->cus, |
| 13455 | &find_dwo_cutu); |
| 13456 | } |
| 13457 | |
| 13458 | if (dwo_cutu != NULL) |
| 13459 | { |
| 13460 | if (dwarf_read_debug) |
| 13461 | { |
| 13462 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) found: @%s\n", |
| 13463 | kind, dwo_name, hex_string (signature), |
| 13464 | host_address_to_string (dwo_cutu)); |
| 13465 | } |
| 13466 | return dwo_cutu; |
| 13467 | } |
| 13468 | } |
| 13469 | } |
| 13470 | |
| 13471 | /* We didn't find it. This could mean a dwo_id mismatch, or |
| 13472 | someone deleted the DWO/DWP file, or the search path isn't set up |
| 13473 | correctly to find the file. */ |
| 13474 | |
| 13475 | if (dwarf_read_debug) |
| 13476 | { |
| 13477 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) not found\n", |
| 13478 | kind, dwo_name, hex_string (signature)); |
| 13479 | } |
| 13480 | |
| 13481 | /* This is a warning and not a complaint because it can be caused by |
| 13482 | pilot error (e.g., user accidentally deleting the DWO). */ |
| 13483 | { |
| 13484 | /* Print the name of the DWP file if we looked there, helps the user |
| 13485 | better diagnose the problem. */ |
| 13486 | std::string dwp_text; |
| 13487 | |
| 13488 | if (dwp_file != NULL) |
| 13489 | dwp_text = string_printf (" [in DWP file %s]", |
| 13490 | lbasename (dwp_file->name)); |
| 13491 | |
| 13492 | warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset 0x%x" |
| 13493 | " [in module %s]"), |
| 13494 | kind, dwo_name, hex_string (signature), |
| 13495 | dwp_text.c_str (), |
| 13496 | this_unit->is_debug_types ? "TU" : "CU", |
| 13497 | to_underlying (this_unit->sect_off), objfile_name (objfile)); |
| 13498 | } |
| 13499 | return NULL; |
| 13500 | } |
| 13501 | |
| 13502 | /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU. |
| 13503 | See lookup_dwo_cutu_unit for details. */ |
| 13504 | |
| 13505 | static struct dwo_unit * |
| 13506 | lookup_dwo_comp_unit (struct dwarf2_per_cu_data *this_cu, |
| 13507 | const char *dwo_name, const char *comp_dir, |
| 13508 | ULONGEST signature) |
| 13509 | { |
| 13510 | return lookup_dwo_cutu (this_cu, dwo_name, comp_dir, signature, 0); |
| 13511 | } |
| 13512 | |
| 13513 | /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU. |
| 13514 | See lookup_dwo_cutu_unit for details. */ |
| 13515 | |
| 13516 | static struct dwo_unit * |
| 13517 | lookup_dwo_type_unit (struct signatured_type *this_tu, |
| 13518 | const char *dwo_name, const char *comp_dir) |
| 13519 | { |
| 13520 | return lookup_dwo_cutu (&this_tu->per_cu, dwo_name, comp_dir, this_tu->signature, 1); |
| 13521 | } |
| 13522 | |
| 13523 | /* Traversal function for queue_and_load_all_dwo_tus. */ |
| 13524 | |
| 13525 | static int |
| 13526 | queue_and_load_dwo_tu (void **slot, void *info) |
| 13527 | { |
| 13528 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; |
| 13529 | struct dwarf2_per_cu_data *per_cu = (struct dwarf2_per_cu_data *) info; |
| 13530 | ULONGEST signature = dwo_unit->signature; |
| 13531 | struct signatured_type *sig_type = |
| 13532 | lookup_dwo_signatured_type (per_cu->cu, signature); |
| 13533 | |
| 13534 | if (sig_type != NULL) |
| 13535 | { |
| 13536 | struct dwarf2_per_cu_data *sig_cu = &sig_type->per_cu; |
| 13537 | |
| 13538 | /* We pass NULL for DEPENDENT_CU because we don't yet know if there's |
| 13539 | a real dependency of PER_CU on SIG_TYPE. That is detected later |
| 13540 | while processing PER_CU. */ |
| 13541 | if (maybe_queue_comp_unit (NULL, sig_cu, per_cu->cu->language)) |
| 13542 | load_full_type_unit (sig_cu); |
| 13543 | VEC_safe_push (dwarf2_per_cu_ptr, per_cu->imported_symtabs, sig_cu); |
| 13544 | } |
| 13545 | |
| 13546 | return 1; |
| 13547 | } |
| 13548 | |
| 13549 | /* Queue all TUs contained in the DWO of PER_CU to be read in. |
| 13550 | The DWO may have the only definition of the type, though it may not be |
| 13551 | referenced anywhere in PER_CU. Thus we have to load *all* its TUs. |
| 13552 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ |
| 13553 | |
| 13554 | static void |
| 13555 | queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *per_cu) |
| 13556 | { |
| 13557 | struct dwo_unit *dwo_unit; |
| 13558 | struct dwo_file *dwo_file; |
| 13559 | |
| 13560 | gdb_assert (!per_cu->is_debug_types); |
| 13561 | gdb_assert (get_dwp_file (per_cu->dwarf2_per_objfile) == NULL); |
| 13562 | gdb_assert (per_cu->cu != NULL); |
| 13563 | |
| 13564 | dwo_unit = per_cu->cu->dwo_unit; |
| 13565 | gdb_assert (dwo_unit != NULL); |
| 13566 | |
| 13567 | dwo_file = dwo_unit->dwo_file; |
| 13568 | if (dwo_file->tus != NULL) |
| 13569 | htab_traverse_noresize (dwo_file->tus, queue_and_load_dwo_tu, per_cu); |
| 13570 | } |
| 13571 | |
| 13572 | /* Free all resources associated with DWO_FILE. |
| 13573 | Close the DWO file and munmap the sections. |
| 13574 | All memory should be on the objfile obstack. */ |
| 13575 | |
| 13576 | static void |
| 13577 | free_dwo_file (struct dwo_file *dwo_file, struct objfile *objfile) |
| 13578 | { |
| 13579 | |
| 13580 | /* Note: dbfd is NULL for virtual DWO files. */ |
| 13581 | gdb_bfd_unref (dwo_file->dbfd); |
| 13582 | |
| 13583 | VEC_free (dwarf2_section_info_def, dwo_file->sections.types); |
| 13584 | } |
| 13585 | |
| 13586 | /* Wrapper for free_dwo_file for use in cleanups. */ |
| 13587 | |
| 13588 | static void |
| 13589 | free_dwo_file_cleanup (void *arg) |
| 13590 | { |
| 13591 | struct free_dwo_file_cleanup_data *data |
| 13592 | = (struct free_dwo_file_cleanup_data *) arg; |
| 13593 | struct objfile *objfile = data->dwarf2_per_objfile->objfile; |
| 13594 | |
| 13595 | free_dwo_file (data->dwo_file, objfile); |
| 13596 | |
| 13597 | xfree (data); |
| 13598 | } |
| 13599 | |
| 13600 | /* Traversal function for free_dwo_files. */ |
| 13601 | |
| 13602 | static int |
| 13603 | free_dwo_file_from_slot (void **slot, void *info) |
| 13604 | { |
| 13605 | struct dwo_file *dwo_file = (struct dwo_file *) *slot; |
| 13606 | struct objfile *objfile = (struct objfile *) info; |
| 13607 | |
| 13608 | free_dwo_file (dwo_file, objfile); |
| 13609 | |
| 13610 | return 1; |
| 13611 | } |
| 13612 | |
| 13613 | /* Free all resources associated with DWO_FILES. */ |
| 13614 | |
| 13615 | static void |
| 13616 | free_dwo_files (htab_t dwo_files, struct objfile *objfile) |
| 13617 | { |
| 13618 | htab_traverse_noresize (dwo_files, free_dwo_file_from_slot, objfile); |
| 13619 | } |
| 13620 | \f |
| 13621 | /* Read in various DIEs. */ |
| 13622 | |
| 13623 | /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes). |
| 13624 | Inherit only the children of the DW_AT_abstract_origin DIE not being |
| 13625 | already referenced by DW_AT_abstract_origin from the children of the |
| 13626 | current DIE. */ |
| 13627 | |
| 13628 | static void |
| 13629 | inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu) |
| 13630 | { |
| 13631 | struct die_info *child_die; |
| 13632 | sect_offset *offsetp; |
| 13633 | /* Parent of DIE - referenced by DW_AT_abstract_origin. */ |
| 13634 | struct die_info *origin_die; |
| 13635 | /* Iterator of the ORIGIN_DIE children. */ |
| 13636 | struct die_info *origin_child_die; |
| 13637 | struct attribute *attr; |
| 13638 | struct dwarf2_cu *origin_cu; |
| 13639 | struct pending **origin_previous_list_in_scope; |
| 13640 | |
| 13641 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); |
| 13642 | if (!attr) |
| 13643 | return; |
| 13644 | |
| 13645 | /* Note that following die references may follow to a die in a |
| 13646 | different cu. */ |
| 13647 | |
| 13648 | origin_cu = cu; |
| 13649 | origin_die = follow_die_ref (die, attr, &origin_cu); |
| 13650 | |
| 13651 | /* We're inheriting ORIGIN's children into the scope we'd put DIE's |
| 13652 | symbols in. */ |
| 13653 | origin_previous_list_in_scope = origin_cu->list_in_scope; |
| 13654 | origin_cu->list_in_scope = cu->list_in_scope; |
| 13655 | |
| 13656 | if (die->tag != origin_die->tag |
| 13657 | && !(die->tag == DW_TAG_inlined_subroutine |
| 13658 | && origin_die->tag == DW_TAG_subprogram)) |
| 13659 | complaint (&symfile_complaints, |
| 13660 | _("DIE 0x%x and its abstract origin 0x%x have different tags"), |
| 13661 | to_underlying (die->sect_off), |
| 13662 | to_underlying (origin_die->sect_off)); |
| 13663 | |
| 13664 | std::vector<sect_offset> offsets; |
| 13665 | |
| 13666 | for (child_die = die->child; |
| 13667 | child_die && child_die->tag; |
| 13668 | child_die = sibling_die (child_die)) |
| 13669 | { |
| 13670 | struct die_info *child_origin_die; |
| 13671 | struct dwarf2_cu *child_origin_cu; |
| 13672 | |
| 13673 | /* We are trying to process concrete instance entries: |
| 13674 | DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but |
| 13675 | it's not relevant to our analysis here. i.e. detecting DIEs that are |
| 13676 | present in the abstract instance but not referenced in the concrete |
| 13677 | one. */ |
| 13678 | if (child_die->tag == DW_TAG_call_site |
| 13679 | || child_die->tag == DW_TAG_GNU_call_site) |
| 13680 | continue; |
| 13681 | |
| 13682 | /* For each CHILD_DIE, find the corresponding child of |
| 13683 | ORIGIN_DIE. If there is more than one layer of |
| 13684 | DW_AT_abstract_origin, follow them all; there shouldn't be, |
| 13685 | but GCC versions at least through 4.4 generate this (GCC PR |
| 13686 | 40573). */ |
| 13687 | child_origin_die = child_die; |
| 13688 | child_origin_cu = cu; |
| 13689 | while (1) |
| 13690 | { |
| 13691 | attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin, |
| 13692 | child_origin_cu); |
| 13693 | if (attr == NULL) |
| 13694 | break; |
| 13695 | child_origin_die = follow_die_ref (child_origin_die, attr, |
| 13696 | &child_origin_cu); |
| 13697 | } |
| 13698 | |
| 13699 | /* According to DWARF3 3.3.8.2 #3 new entries without their abstract |
| 13700 | counterpart may exist. */ |
| 13701 | if (child_origin_die != child_die) |
| 13702 | { |
| 13703 | if (child_die->tag != child_origin_die->tag |
| 13704 | && !(child_die->tag == DW_TAG_inlined_subroutine |
| 13705 | && child_origin_die->tag == DW_TAG_subprogram)) |
| 13706 | complaint (&symfile_complaints, |
| 13707 | _("Child DIE 0x%x and its abstract origin 0x%x have " |
| 13708 | "different tags"), |
| 13709 | to_underlying (child_die->sect_off), |
| 13710 | to_underlying (child_origin_die->sect_off)); |
| 13711 | if (child_origin_die->parent != origin_die) |
| 13712 | complaint (&symfile_complaints, |
| 13713 | _("Child DIE 0x%x and its abstract origin 0x%x have " |
| 13714 | "different parents"), |
| 13715 | to_underlying (child_die->sect_off), |
| 13716 | to_underlying (child_origin_die->sect_off)); |
| 13717 | else |
| 13718 | offsets.push_back (child_origin_die->sect_off); |
| 13719 | } |
| 13720 | } |
| 13721 | std::sort (offsets.begin (), offsets.end ()); |
| 13722 | sect_offset *offsets_end = offsets.data () + offsets.size (); |
| 13723 | for (offsetp = offsets.data () + 1; offsetp < offsets_end; offsetp++) |
| 13724 | if (offsetp[-1] == *offsetp) |
| 13725 | complaint (&symfile_complaints, |
| 13726 | _("Multiple children of DIE 0x%x refer " |
| 13727 | "to DIE 0x%x as their abstract origin"), |
| 13728 | to_underlying (die->sect_off), to_underlying (*offsetp)); |
| 13729 | |
| 13730 | offsetp = offsets.data (); |
| 13731 | origin_child_die = origin_die->child; |
| 13732 | while (origin_child_die && origin_child_die->tag) |
| 13733 | { |
| 13734 | /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */ |
| 13735 | while (offsetp < offsets_end |
| 13736 | && *offsetp < origin_child_die->sect_off) |
| 13737 | offsetp++; |
| 13738 | if (offsetp >= offsets_end |
| 13739 | || *offsetp > origin_child_die->sect_off) |
| 13740 | { |
| 13741 | /* Found that ORIGIN_CHILD_DIE is really not referenced. |
| 13742 | Check whether we're already processing ORIGIN_CHILD_DIE. |
| 13743 | This can happen with mutually referenced abstract_origins. |
| 13744 | PR 16581. */ |
| 13745 | if (!origin_child_die->in_process) |
| 13746 | process_die (origin_child_die, origin_cu); |
| 13747 | } |
| 13748 | origin_child_die = sibling_die (origin_child_die); |
| 13749 | } |
| 13750 | origin_cu->list_in_scope = origin_previous_list_in_scope; |
| 13751 | } |
| 13752 | |
| 13753 | static void |
| 13754 | read_func_scope (struct die_info *die, struct dwarf2_cu *cu) |
| 13755 | { |
| 13756 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 13757 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
| 13758 | struct context_stack *newobj; |
| 13759 | CORE_ADDR lowpc; |
| 13760 | CORE_ADDR highpc; |
| 13761 | struct die_info *child_die; |
| 13762 | struct attribute *attr, *call_line, *call_file; |
| 13763 | const char *name; |
| 13764 | CORE_ADDR baseaddr; |
| 13765 | struct block *block; |
| 13766 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
| 13767 | std::vector<struct symbol *> template_args; |
| 13768 | struct template_symbol *templ_func = NULL; |
| 13769 | |
| 13770 | if (inlined_func) |
| 13771 | { |
| 13772 | /* If we do not have call site information, we can't show the |
| 13773 | caller of this inlined function. That's too confusing, so |
| 13774 | only use the scope for local variables. */ |
| 13775 | call_line = dwarf2_attr (die, DW_AT_call_line, cu); |
| 13776 | call_file = dwarf2_attr (die, DW_AT_call_file, cu); |
| 13777 | if (call_line == NULL || call_file == NULL) |
| 13778 | { |
| 13779 | read_lexical_block_scope (die, cu); |
| 13780 | return; |
| 13781 | } |
| 13782 | } |
| 13783 | |
| 13784 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
| 13785 | |
| 13786 | name = dwarf2_name (die, cu); |
| 13787 | |
| 13788 | /* Ignore functions with missing or empty names. These are actually |
| 13789 | illegal according to the DWARF standard. */ |
| 13790 | if (name == NULL) |
| 13791 | { |
| 13792 | complaint (&symfile_complaints, |
| 13793 | _("missing name for subprogram DIE at %d"), |
| 13794 | to_underlying (die->sect_off)); |
| 13795 | return; |
| 13796 | } |
| 13797 | |
| 13798 | /* Ignore functions with missing or invalid low and high pc attributes. */ |
| 13799 | if (dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL) |
| 13800 | <= PC_BOUNDS_INVALID) |
| 13801 | { |
| 13802 | attr = dwarf2_attr (die, DW_AT_external, cu); |
| 13803 | if (!attr || !DW_UNSND (attr)) |
| 13804 | complaint (&symfile_complaints, |
| 13805 | _("cannot get low and high bounds " |
| 13806 | "for subprogram DIE at %d"), |
| 13807 | to_underlying (die->sect_off)); |
| 13808 | return; |
| 13809 | } |
| 13810 | |
| 13811 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
| 13812 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); |
| 13813 | |
| 13814 | /* If we have any template arguments, then we must allocate a |
| 13815 | different sort of symbol. */ |
| 13816 | for (child_die = die->child; child_die; child_die = sibling_die (child_die)) |
| 13817 | { |
| 13818 | if (child_die->tag == DW_TAG_template_type_param |
| 13819 | || child_die->tag == DW_TAG_template_value_param) |
| 13820 | { |
| 13821 | templ_func = allocate_template_symbol (objfile); |
| 13822 | templ_func->subclass = SYMBOL_TEMPLATE; |
| 13823 | break; |
| 13824 | } |
| 13825 | } |
| 13826 | |
| 13827 | newobj = push_context (0, lowpc); |
| 13828 | newobj->name = new_symbol (die, read_type_die (die, cu), cu, |
| 13829 | (struct symbol *) templ_func); |
| 13830 | |
| 13831 | /* If there is a location expression for DW_AT_frame_base, record |
| 13832 | it. */ |
| 13833 | attr = dwarf2_attr (die, DW_AT_frame_base, cu); |
| 13834 | if (attr) |
| 13835 | dwarf2_symbol_mark_computed (attr, newobj->name, cu, 1); |
| 13836 | |
| 13837 | /* If there is a location for the static link, record it. */ |
| 13838 | newobj->static_link = NULL; |
| 13839 | attr = dwarf2_attr (die, DW_AT_static_link, cu); |
| 13840 | if (attr) |
| 13841 | { |
| 13842 | newobj->static_link |
| 13843 | = XOBNEW (&objfile->objfile_obstack, struct dynamic_prop); |
| 13844 | attr_to_dynamic_prop (attr, die, cu, newobj->static_link); |
| 13845 | } |
| 13846 | |
| 13847 | cu->list_in_scope = &local_symbols; |
| 13848 | |
| 13849 | if (die->child != NULL) |
| 13850 | { |
| 13851 | child_die = die->child; |
| 13852 | while (child_die && child_die->tag) |
| 13853 | { |
| 13854 | if (child_die->tag == DW_TAG_template_type_param |
| 13855 | || child_die->tag == DW_TAG_template_value_param) |
| 13856 | { |
| 13857 | struct symbol *arg = new_symbol (child_die, NULL, cu); |
| 13858 | |
| 13859 | if (arg != NULL) |
| 13860 | template_args.push_back (arg); |
| 13861 | } |
| 13862 | else |
| 13863 | process_die (child_die, cu); |
| 13864 | child_die = sibling_die (child_die); |
| 13865 | } |
| 13866 | } |
| 13867 | |
| 13868 | inherit_abstract_dies (die, cu); |
| 13869 | |
| 13870 | /* If we have a DW_AT_specification, we might need to import using |
| 13871 | directives from the context of the specification DIE. See the |
| 13872 | comment in determine_prefix. */ |
| 13873 | if (cu->language == language_cplus |
| 13874 | && dwarf2_attr (die, DW_AT_specification, cu)) |
| 13875 | { |
| 13876 | struct dwarf2_cu *spec_cu = cu; |
| 13877 | struct die_info *spec_die = die_specification (die, &spec_cu); |
| 13878 | |
| 13879 | while (spec_die) |
| 13880 | { |
| 13881 | child_die = spec_die->child; |
| 13882 | while (child_die && child_die->tag) |
| 13883 | { |
| 13884 | if (child_die->tag == DW_TAG_imported_module) |
| 13885 | process_die (child_die, spec_cu); |
| 13886 | child_die = sibling_die (child_die); |
| 13887 | } |
| 13888 | |
| 13889 | /* In some cases, GCC generates specification DIEs that |
| 13890 | themselves contain DW_AT_specification attributes. */ |
| 13891 | spec_die = die_specification (spec_die, &spec_cu); |
| 13892 | } |
| 13893 | } |
| 13894 | |
| 13895 | newobj = pop_context (); |
| 13896 | /* Make a block for the local symbols within. */ |
| 13897 | block = finish_block (newobj->name, &local_symbols, newobj->old_blocks, |
| 13898 | newobj->static_link, lowpc, highpc); |
| 13899 | |
| 13900 | /* For C++, set the block's scope. */ |
| 13901 | if ((cu->language == language_cplus |
| 13902 | || cu->language == language_fortran |
| 13903 | || cu->language == language_d |
| 13904 | || cu->language == language_rust) |
| 13905 | && cu->processing_has_namespace_info) |
| 13906 | block_set_scope (block, determine_prefix (die, cu), |
| 13907 | &objfile->objfile_obstack); |
| 13908 | |
| 13909 | /* If we have address ranges, record them. */ |
| 13910 | dwarf2_record_block_ranges (die, block, baseaddr, cu); |
| 13911 | |
| 13912 | gdbarch_make_symbol_special (gdbarch, newobj->name, objfile); |
| 13913 | |
| 13914 | /* Attach template arguments to function. */ |
| 13915 | if (!template_args.empty ()) |
| 13916 | { |
| 13917 | gdb_assert (templ_func != NULL); |
| 13918 | |
| 13919 | templ_func->n_template_arguments = template_args.size (); |
| 13920 | templ_func->template_arguments |
| 13921 | = XOBNEWVEC (&objfile->objfile_obstack, struct symbol *, |
| 13922 | templ_func->n_template_arguments); |
| 13923 | memcpy (templ_func->template_arguments, |
| 13924 | template_args.data (), |
| 13925 | (templ_func->n_template_arguments * sizeof (struct symbol *))); |
| 13926 | } |
| 13927 | |
| 13928 | /* In C++, we can have functions nested inside functions (e.g., when |
| 13929 | a function declares a class that has methods). This means that |
| 13930 | when we finish processing a function scope, we may need to go |
| 13931 | back to building a containing block's symbol lists. */ |
| 13932 | local_symbols = newobj->locals; |
| 13933 | local_using_directives = newobj->local_using_directives; |
| 13934 | |
| 13935 | /* If we've finished processing a top-level function, subsequent |
| 13936 | symbols go in the file symbol list. */ |
| 13937 | if (outermost_context_p ()) |
| 13938 | cu->list_in_scope = &file_symbols; |
| 13939 | } |
| 13940 | |
| 13941 | /* Process all the DIES contained within a lexical block scope. Start |
| 13942 | a new scope, process the dies, and then close the scope. */ |
| 13943 | |
| 13944 | static void |
| 13945 | read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu) |
| 13946 | { |
| 13947 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 13948 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
| 13949 | struct context_stack *newobj; |
| 13950 | CORE_ADDR lowpc, highpc; |
| 13951 | struct die_info *child_die; |
| 13952 | CORE_ADDR baseaddr; |
| 13953 | |
| 13954 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
| 13955 | |
| 13956 | /* Ignore blocks with missing or invalid low and high pc attributes. */ |
| 13957 | /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges |
| 13958 | as multiple lexical blocks? Handling children in a sane way would |
| 13959 | be nasty. Might be easier to properly extend generic blocks to |
| 13960 | describe ranges. */ |
| 13961 | switch (dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL)) |
| 13962 | { |
| 13963 | case PC_BOUNDS_NOT_PRESENT: |
| 13964 | /* DW_TAG_lexical_block has no attributes, process its children as if |
| 13965 | there was no wrapping by that DW_TAG_lexical_block. |
| 13966 | GCC does no longer produces such DWARF since GCC r224161. */ |
| 13967 | for (child_die = die->child; |
| 13968 | child_die != NULL && child_die->tag; |
| 13969 | child_die = sibling_die (child_die)) |
| 13970 | process_die (child_die, cu); |
| 13971 | return; |
| 13972 | case PC_BOUNDS_INVALID: |
| 13973 | return; |
| 13974 | } |
| 13975 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
| 13976 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); |
| 13977 | |
| 13978 | push_context (0, lowpc); |
| 13979 | if (die->child != NULL) |
| 13980 | { |
| 13981 | child_die = die->child; |
| 13982 | while (child_die && child_die->tag) |
| 13983 | { |
| 13984 | process_die (child_die, cu); |
| 13985 | child_die = sibling_die (child_die); |
| 13986 | } |
| 13987 | } |
| 13988 | inherit_abstract_dies (die, cu); |
| 13989 | newobj = pop_context (); |
| 13990 | |
| 13991 | if (local_symbols != NULL || local_using_directives != NULL) |
| 13992 | { |
| 13993 | struct block *block |
| 13994 | = finish_block (0, &local_symbols, newobj->old_blocks, NULL, |
| 13995 | newobj->start_addr, highpc); |
| 13996 | |
| 13997 | /* Note that recording ranges after traversing children, as we |
| 13998 | do here, means that recording a parent's ranges entails |
| 13999 | walking across all its children's ranges as they appear in |
| 14000 | the address map, which is quadratic behavior. |
| 14001 | |
| 14002 | It would be nicer to record the parent's ranges before |
| 14003 | traversing its children, simply overriding whatever you find |
| 14004 | there. But since we don't even decide whether to create a |
| 14005 | block until after we've traversed its children, that's hard |
| 14006 | to do. */ |
| 14007 | dwarf2_record_block_ranges (die, block, baseaddr, cu); |
| 14008 | } |
| 14009 | local_symbols = newobj->locals; |
| 14010 | local_using_directives = newobj->local_using_directives; |
| 14011 | } |
| 14012 | |
| 14013 | /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */ |
| 14014 | |
| 14015 | static void |
| 14016 | read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu) |
| 14017 | { |
| 14018 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 14019 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
| 14020 | CORE_ADDR pc, baseaddr; |
| 14021 | struct attribute *attr; |
| 14022 | struct call_site *call_site, call_site_local; |
| 14023 | void **slot; |
| 14024 | int nparams; |
| 14025 | struct die_info *child_die; |
| 14026 | |
| 14027 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
| 14028 | |
| 14029 | attr = dwarf2_attr (die, DW_AT_call_return_pc, cu); |
| 14030 | if (attr == NULL) |
| 14031 | { |
| 14032 | /* This was a pre-DWARF-5 GNU extension alias |
| 14033 | for DW_AT_call_return_pc. */ |
| 14034 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
| 14035 | } |
| 14036 | if (!attr) |
| 14037 | { |
| 14038 | complaint (&symfile_complaints, |
| 14039 | _("missing DW_AT_call_return_pc for DW_TAG_call_site " |
| 14040 | "DIE 0x%x [in module %s]"), |
| 14041 | to_underlying (die->sect_off), objfile_name (objfile)); |
| 14042 | return; |
| 14043 | } |
| 14044 | pc = attr_value_as_address (attr) + baseaddr; |
| 14045 | pc = gdbarch_adjust_dwarf2_addr (gdbarch, pc); |
| 14046 | |
| 14047 | if (cu->call_site_htab == NULL) |
| 14048 | cu->call_site_htab = htab_create_alloc_ex (16, core_addr_hash, core_addr_eq, |
| 14049 | NULL, &objfile->objfile_obstack, |
| 14050 | hashtab_obstack_allocate, NULL); |
| 14051 | call_site_local.pc = pc; |
| 14052 | slot = htab_find_slot (cu->call_site_htab, &call_site_local, INSERT); |
| 14053 | if (*slot != NULL) |
| 14054 | { |
| 14055 | complaint (&symfile_complaints, |
| 14056 | _("Duplicate PC %s for DW_TAG_call_site " |
| 14057 | "DIE 0x%x [in module %s]"), |
| 14058 | paddress (gdbarch, pc), to_underlying (die->sect_off), |
| 14059 | objfile_name (objfile)); |
| 14060 | return; |
| 14061 | } |
| 14062 | |
| 14063 | /* Count parameters at the caller. */ |
| 14064 | |
| 14065 | nparams = 0; |
| 14066 | for (child_die = die->child; child_die && child_die->tag; |
| 14067 | child_die = sibling_die (child_die)) |
| 14068 | { |
| 14069 | if (child_die->tag != DW_TAG_call_site_parameter |
| 14070 | && child_die->tag != DW_TAG_GNU_call_site_parameter) |
| 14071 | { |
| 14072 | complaint (&symfile_complaints, |
| 14073 | _("Tag %d is not DW_TAG_call_site_parameter in " |
| 14074 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), |
| 14075 | child_die->tag, to_underlying (child_die->sect_off), |
| 14076 | objfile_name (objfile)); |
| 14077 | continue; |
| 14078 | } |
| 14079 | |
| 14080 | nparams++; |
| 14081 | } |
| 14082 | |
| 14083 | call_site |
| 14084 | = ((struct call_site *) |
| 14085 | obstack_alloc (&objfile->objfile_obstack, |
| 14086 | sizeof (*call_site) |
| 14087 | + (sizeof (*call_site->parameter) * (nparams - 1)))); |
| 14088 | *slot = call_site; |
| 14089 | memset (call_site, 0, sizeof (*call_site) - sizeof (*call_site->parameter)); |
| 14090 | call_site->pc = pc; |
| 14091 | |
| 14092 | if (dwarf2_flag_true_p (die, DW_AT_call_tail_call, cu) |
| 14093 | || dwarf2_flag_true_p (die, DW_AT_GNU_tail_call, cu)) |
| 14094 | { |
| 14095 | struct die_info *func_die; |
| 14096 | |
| 14097 | /* Skip also over DW_TAG_inlined_subroutine. */ |
| 14098 | for (func_die = die->parent; |
| 14099 | func_die && func_die->tag != DW_TAG_subprogram |
| 14100 | && func_die->tag != DW_TAG_subroutine_type; |
| 14101 | func_die = func_die->parent); |
| 14102 | |
| 14103 | /* DW_AT_call_all_calls is a superset |
| 14104 | of DW_AT_call_all_tail_calls. */ |
| 14105 | if (func_die |
| 14106 | && !dwarf2_flag_true_p (func_die, DW_AT_call_all_calls, cu) |
| 14107 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_call_sites, cu) |
| 14108 | && !dwarf2_flag_true_p (func_die, DW_AT_call_all_tail_calls, cu) |
| 14109 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_tail_call_sites, cu)) |
| 14110 | { |
| 14111 | /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is |
| 14112 | not complete. But keep CALL_SITE for look ups via call_site_htab, |
| 14113 | both the initial caller containing the real return address PC and |
| 14114 | the final callee containing the current PC of a chain of tail |
| 14115 | calls do not need to have the tail call list complete. But any |
| 14116 | function candidate for a virtual tail call frame searched via |
| 14117 | TYPE_TAIL_CALL_LIST must have the tail call list complete to be |
| 14118 | determined unambiguously. */ |
| 14119 | } |
| 14120 | else |
| 14121 | { |
| 14122 | struct type *func_type = NULL; |
| 14123 | |
| 14124 | if (func_die) |
| 14125 | func_type = get_die_type (func_die, cu); |
| 14126 | if (func_type != NULL) |
| 14127 | { |
| 14128 | gdb_assert (TYPE_CODE (func_type) == TYPE_CODE_FUNC); |
| 14129 | |
| 14130 | /* Enlist this call site to the function. */ |
| 14131 | call_site->tail_call_next = TYPE_TAIL_CALL_LIST (func_type); |
| 14132 | TYPE_TAIL_CALL_LIST (func_type) = call_site; |
| 14133 | } |
| 14134 | else |
| 14135 | complaint (&symfile_complaints, |
| 14136 | _("Cannot find function owning DW_TAG_call_site " |
| 14137 | "DIE 0x%x [in module %s]"), |
| 14138 | to_underlying (die->sect_off), objfile_name (objfile)); |
| 14139 | } |
| 14140 | } |
| 14141 | |
| 14142 | attr = dwarf2_attr (die, DW_AT_call_target, cu); |
| 14143 | if (attr == NULL) |
| 14144 | attr = dwarf2_attr (die, DW_AT_GNU_call_site_target, cu); |
| 14145 | if (attr == NULL) |
| 14146 | attr = dwarf2_attr (die, DW_AT_call_origin, cu); |
| 14147 | if (attr == NULL) |
| 14148 | { |
| 14149 | /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */ |
| 14150 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); |
| 14151 | } |
| 14152 | SET_FIELD_DWARF_BLOCK (call_site->target, NULL); |
| 14153 | if (!attr || (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)) |
| 14154 | /* Keep NULL DWARF_BLOCK. */; |
| 14155 | else if (attr_form_is_block (attr)) |
| 14156 | { |
| 14157 | struct dwarf2_locexpr_baton *dlbaton; |
| 14158 | |
| 14159 | dlbaton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
| 14160 | dlbaton->data = DW_BLOCK (attr)->data; |
| 14161 | dlbaton->size = DW_BLOCK (attr)->size; |
| 14162 | dlbaton->per_cu = cu->per_cu; |
| 14163 | |
| 14164 | SET_FIELD_DWARF_BLOCK (call_site->target, dlbaton); |
| 14165 | } |
| 14166 | else if (attr_form_is_ref (attr)) |
| 14167 | { |
| 14168 | struct dwarf2_cu *target_cu = cu; |
| 14169 | struct die_info *target_die; |
| 14170 | |
| 14171 | target_die = follow_die_ref (die, attr, &target_cu); |
| 14172 | gdb_assert (target_cu->per_cu->dwarf2_per_objfile->objfile == objfile); |
| 14173 | if (die_is_declaration (target_die, target_cu)) |
| 14174 | { |
| 14175 | const char *target_physname; |
| 14176 | |
| 14177 | /* Prefer the mangled name; otherwise compute the demangled one. */ |
| 14178 | target_physname = dw2_linkage_name (target_die, target_cu); |
| 14179 | if (target_physname == NULL) |
| 14180 | target_physname = dwarf2_physname (NULL, target_die, target_cu); |
| 14181 | if (target_physname == NULL) |
| 14182 | complaint (&symfile_complaints, |
| 14183 | _("DW_AT_call_target target DIE has invalid " |
| 14184 | "physname, for referencing DIE 0x%x [in module %s]"), |
| 14185 | to_underlying (die->sect_off), objfile_name (objfile)); |
| 14186 | else |
| 14187 | SET_FIELD_PHYSNAME (call_site->target, target_physname); |
| 14188 | } |
| 14189 | else |
| 14190 | { |
| 14191 | CORE_ADDR lowpc; |
| 14192 | |
| 14193 | /* DW_AT_entry_pc should be preferred. */ |
| 14194 | if (dwarf2_get_pc_bounds (target_die, &lowpc, NULL, target_cu, NULL) |
| 14195 | <= PC_BOUNDS_INVALID) |
| 14196 | complaint (&symfile_complaints, |
| 14197 | _("DW_AT_call_target target DIE has invalid " |
| 14198 | "low pc, for referencing DIE 0x%x [in module %s]"), |
| 14199 | to_underlying (die->sect_off), objfile_name (objfile)); |
| 14200 | else |
| 14201 | { |
| 14202 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
| 14203 | SET_FIELD_PHYSADDR (call_site->target, lowpc); |
| 14204 | } |
| 14205 | } |
| 14206 | } |
| 14207 | else |
| 14208 | complaint (&symfile_complaints, |
| 14209 | _("DW_TAG_call_site DW_AT_call_target is neither " |
| 14210 | "block nor reference, for DIE 0x%x [in module %s]"), |
| 14211 | to_underlying (die->sect_off), objfile_name (objfile)); |
| 14212 | |
| 14213 | call_site->per_cu = cu->per_cu; |
| 14214 | |
| 14215 | for (child_die = die->child; |
| 14216 | child_die && child_die->tag; |
| 14217 | child_die = sibling_die (child_die)) |
| 14218 | { |
| 14219 | struct call_site_parameter *parameter; |
| 14220 | struct attribute *loc, *origin; |
| 14221 | |
| 14222 | if (child_die->tag != DW_TAG_call_site_parameter |
| 14223 | && child_die->tag != DW_TAG_GNU_call_site_parameter) |
| 14224 | { |
| 14225 | /* Already printed the complaint above. */ |
| 14226 | continue; |
| 14227 | } |
| 14228 | |
| 14229 | gdb_assert (call_site->parameter_count < nparams); |
| 14230 | parameter = &call_site->parameter[call_site->parameter_count]; |
| 14231 | |
| 14232 | /* DW_AT_location specifies the register number or DW_AT_abstract_origin |
| 14233 | specifies DW_TAG_formal_parameter. Value of the data assumed for the |
| 14234 | register is contained in DW_AT_call_value. */ |
| 14235 | |
| 14236 | loc = dwarf2_attr (child_die, DW_AT_location, cu); |
| 14237 | origin = dwarf2_attr (child_die, DW_AT_call_parameter, cu); |
| 14238 | if (origin == NULL) |
| 14239 | { |
| 14240 | /* This was a pre-DWARF-5 GNU extension alias |
| 14241 | for DW_AT_call_parameter. */ |
| 14242 | origin = dwarf2_attr (child_die, DW_AT_abstract_origin, cu); |
| 14243 | } |
| 14244 | if (loc == NULL && origin != NULL && attr_form_is_ref (origin)) |
| 14245 | { |
| 14246 | parameter->kind = CALL_SITE_PARAMETER_PARAM_OFFSET; |
| 14247 | |
| 14248 | sect_offset sect_off |
| 14249 | = (sect_offset) dwarf2_get_ref_die_offset (origin); |
| 14250 | if (!offset_in_cu_p (&cu->header, sect_off)) |
| 14251 | { |
| 14252 | /* As DW_OP_GNU_parameter_ref uses CU-relative offset this |
| 14253 | binding can be done only inside one CU. Such referenced DIE |
| 14254 | therefore cannot be even moved to DW_TAG_partial_unit. */ |
| 14255 | complaint (&symfile_complaints, |
| 14256 | _("DW_AT_call_parameter offset is not in CU for " |
| 14257 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), |
| 14258 | to_underlying (child_die->sect_off), |
| 14259 | objfile_name (objfile)); |
| 14260 | continue; |
| 14261 | } |
| 14262 | parameter->u.param_cu_off |
| 14263 | = (cu_offset) (sect_off - cu->header.sect_off); |
| 14264 | } |
| 14265 | else if (loc == NULL || origin != NULL || !attr_form_is_block (loc)) |
| 14266 | { |
| 14267 | complaint (&symfile_complaints, |
| 14268 | _("No DW_FORM_block* DW_AT_location for " |
| 14269 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), |
| 14270 | to_underlying (child_die->sect_off), objfile_name (objfile)); |
| 14271 | continue; |
| 14272 | } |
| 14273 | else |
| 14274 | { |
| 14275 | parameter->u.dwarf_reg = dwarf_block_to_dwarf_reg |
| 14276 | (DW_BLOCK (loc)->data, &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size]); |
| 14277 | if (parameter->u.dwarf_reg != -1) |
| 14278 | parameter->kind = CALL_SITE_PARAMETER_DWARF_REG; |
| 14279 | else if (dwarf_block_to_sp_offset (gdbarch, DW_BLOCK (loc)->data, |
| 14280 | &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size], |
| 14281 | ¶meter->u.fb_offset)) |
| 14282 | parameter->kind = CALL_SITE_PARAMETER_FB_OFFSET; |
| 14283 | else |
| 14284 | { |
| 14285 | complaint (&symfile_complaints, |
| 14286 | _("Only single DW_OP_reg or DW_OP_fbreg is supported " |
| 14287 | "for DW_FORM_block* DW_AT_location is supported for " |
| 14288 | "DW_TAG_call_site child DIE 0x%x " |
| 14289 | "[in module %s]"), |
| 14290 | to_underlying (child_die->sect_off), |
| 14291 | objfile_name (objfile)); |
| 14292 | continue; |
| 14293 | } |
| 14294 | } |
| 14295 | |
| 14296 | attr = dwarf2_attr (child_die, DW_AT_call_value, cu); |
| 14297 | if (attr == NULL) |
| 14298 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_value, cu); |
| 14299 | if (!attr_form_is_block (attr)) |
| 14300 | { |
| 14301 | complaint (&symfile_complaints, |
| 14302 | _("No DW_FORM_block* DW_AT_call_value for " |
| 14303 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), |
| 14304 | to_underlying (child_die->sect_off), |
| 14305 | objfile_name (objfile)); |
| 14306 | continue; |
| 14307 | } |
| 14308 | parameter->value = DW_BLOCK (attr)->data; |
| 14309 | parameter->value_size = DW_BLOCK (attr)->size; |
| 14310 | |
| 14311 | /* Parameters are not pre-cleared by memset above. */ |
| 14312 | parameter->data_value = NULL; |
| 14313 | parameter->data_value_size = 0; |
| 14314 | call_site->parameter_count++; |
| 14315 | |
| 14316 | attr = dwarf2_attr (child_die, DW_AT_call_data_value, cu); |
| 14317 | if (attr == NULL) |
| 14318 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_data_value, cu); |
| 14319 | if (attr) |
| 14320 | { |
| 14321 | if (!attr_form_is_block (attr)) |
| 14322 | complaint (&symfile_complaints, |
| 14323 | _("No DW_FORM_block* DW_AT_call_data_value for " |
| 14324 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), |
| 14325 | to_underlying (child_die->sect_off), |
| 14326 | objfile_name (objfile)); |
| 14327 | else |
| 14328 | { |
| 14329 | parameter->data_value = DW_BLOCK (attr)->data; |
| 14330 | parameter->data_value_size = DW_BLOCK (attr)->size; |
| 14331 | } |
| 14332 | } |
| 14333 | } |
| 14334 | } |
| 14335 | |
| 14336 | /* Helper function for read_variable. If DIE represents a virtual |
| 14337 | table, then return the type of the concrete object that is |
| 14338 | associated with the virtual table. Otherwise, return NULL. */ |
| 14339 | |
| 14340 | static struct type * |
| 14341 | rust_containing_type (struct die_info *die, struct dwarf2_cu *cu) |
| 14342 | { |
| 14343 | struct attribute *attr = dwarf2_attr (die, DW_AT_type, cu); |
| 14344 | if (attr == NULL) |
| 14345 | return NULL; |
| 14346 | |
| 14347 | /* Find the type DIE. */ |
| 14348 | struct die_info *type_die = NULL; |
| 14349 | struct dwarf2_cu *type_cu = cu; |
| 14350 | |
| 14351 | if (attr_form_is_ref (attr)) |
| 14352 | type_die = follow_die_ref (die, attr, &type_cu); |
| 14353 | if (type_die == NULL) |
| 14354 | return NULL; |
| 14355 | |
| 14356 | if (dwarf2_attr (type_die, DW_AT_containing_type, type_cu) == NULL) |
| 14357 | return NULL; |
| 14358 | return die_containing_type (type_die, type_cu); |
| 14359 | } |
| 14360 | |
| 14361 | /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */ |
| 14362 | |
| 14363 | static void |
| 14364 | read_variable (struct die_info *die, struct dwarf2_cu *cu) |
| 14365 | { |
| 14366 | struct rust_vtable_symbol *storage = NULL; |
| 14367 | |
| 14368 | if (cu->language == language_rust) |
| 14369 | { |
| 14370 | struct type *containing_type = rust_containing_type (die, cu); |
| 14371 | |
| 14372 | if (containing_type != NULL) |
| 14373 | { |
| 14374 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 14375 | |
| 14376 | storage = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
| 14377 | struct rust_vtable_symbol); |
| 14378 | initialize_objfile_symbol (storage); |
| 14379 | storage->concrete_type = containing_type; |
| 14380 | storage->subclass = SYMBOL_RUST_VTABLE; |
| 14381 | } |
| 14382 | } |
| 14383 | |
| 14384 | new_symbol (die, NULL, cu, storage); |
| 14385 | } |
| 14386 | |
| 14387 | /* Call CALLBACK from DW_AT_ranges attribute value OFFSET |
| 14388 | reading .debug_rnglists. |
| 14389 | Callback's type should be: |
| 14390 | void (CORE_ADDR range_beginning, CORE_ADDR range_end) |
| 14391 | Return true if the attributes are present and valid, otherwise, |
| 14392 | return false. */ |
| 14393 | |
| 14394 | template <typename Callback> |
| 14395 | static bool |
| 14396 | dwarf2_rnglists_process (unsigned offset, struct dwarf2_cu *cu, |
| 14397 | Callback &&callback) |
| 14398 | { |
| 14399 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 14400 | = cu->per_cu->dwarf2_per_objfile; |
| 14401 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 14402 | bfd *obfd = objfile->obfd; |
| 14403 | /* Base address selection entry. */ |
| 14404 | CORE_ADDR base; |
| 14405 | int found_base; |
| 14406 | const gdb_byte *buffer; |
| 14407 | CORE_ADDR baseaddr; |
| 14408 | bool overflow = false; |
| 14409 | |
| 14410 | found_base = cu->base_known; |
| 14411 | base = cu->base_address; |
| 14412 | |
| 14413 | dwarf2_read_section (objfile, &dwarf2_per_objfile->rnglists); |
| 14414 | if (offset >= dwarf2_per_objfile->rnglists.size) |
| 14415 | { |
| 14416 | complaint (&symfile_complaints, |
| 14417 | _("Offset %d out of bounds for DW_AT_ranges attribute"), |
| 14418 | offset); |
| 14419 | return false; |
| 14420 | } |
| 14421 | buffer = dwarf2_per_objfile->rnglists.buffer + offset; |
| 14422 | |
| 14423 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
| 14424 | |
| 14425 | while (1) |
| 14426 | { |
| 14427 | /* Initialize it due to a false compiler warning. */ |
| 14428 | CORE_ADDR range_beginning = 0, range_end = 0; |
| 14429 | const gdb_byte *buf_end = (dwarf2_per_objfile->rnglists.buffer |
| 14430 | + dwarf2_per_objfile->rnglists.size); |
| 14431 | unsigned int bytes_read; |
| 14432 | |
| 14433 | if (buffer == buf_end) |
| 14434 | { |
| 14435 | overflow = true; |
| 14436 | break; |
| 14437 | } |
| 14438 | const auto rlet = static_cast<enum dwarf_range_list_entry>(*buffer++); |
| 14439 | switch (rlet) |
| 14440 | { |
| 14441 | case DW_RLE_end_of_list: |
| 14442 | break; |
| 14443 | case DW_RLE_base_address: |
| 14444 | if (buffer + cu->header.addr_size > buf_end) |
| 14445 | { |
| 14446 | overflow = true; |
| 14447 | break; |
| 14448 | } |
| 14449 | base = read_address (obfd, buffer, cu, &bytes_read); |
| 14450 | found_base = 1; |
| 14451 | buffer += bytes_read; |
| 14452 | break; |
| 14453 | case DW_RLE_start_length: |
| 14454 | if (buffer + cu->header.addr_size > buf_end) |
| 14455 | { |
| 14456 | overflow = true; |
| 14457 | break; |
| 14458 | } |
| 14459 | range_beginning = read_address (obfd, buffer, cu, &bytes_read); |
| 14460 | buffer += bytes_read; |
| 14461 | range_end = (range_beginning |
| 14462 | + read_unsigned_leb128 (obfd, buffer, &bytes_read)); |
| 14463 | buffer += bytes_read; |
| 14464 | if (buffer > buf_end) |
| 14465 | { |
| 14466 | overflow = true; |
| 14467 | break; |
| 14468 | } |
| 14469 | break; |
| 14470 | case DW_RLE_offset_pair: |
| 14471 | range_beginning = read_unsigned_leb128 (obfd, buffer, &bytes_read); |
| 14472 | buffer += bytes_read; |
| 14473 | if (buffer > buf_end) |
| 14474 | { |
| 14475 | overflow = true; |
| 14476 | break; |
| 14477 | } |
| 14478 | range_end = read_unsigned_leb128 (obfd, buffer, &bytes_read); |
| 14479 | buffer += bytes_read; |
| 14480 | if (buffer > buf_end) |
| 14481 | { |
| 14482 | overflow = true; |
| 14483 | break; |
| 14484 | } |
| 14485 | break; |
| 14486 | case DW_RLE_start_end: |
| 14487 | if (buffer + 2 * cu->header.addr_size > buf_end) |
| 14488 | { |
| 14489 | overflow = true; |
| 14490 | break; |
| 14491 | } |
| 14492 | range_beginning = read_address (obfd, buffer, cu, &bytes_read); |
| 14493 | buffer += bytes_read; |
| 14494 | range_end = read_address (obfd, buffer, cu, &bytes_read); |
| 14495 | buffer += bytes_read; |
| 14496 | break; |
| 14497 | default: |
| 14498 | complaint (&symfile_complaints, |
| 14499 | _("Invalid .debug_rnglists data (no base address)")); |
| 14500 | return false; |
| 14501 | } |
| 14502 | if (rlet == DW_RLE_end_of_list || overflow) |
| 14503 | break; |
| 14504 | if (rlet == DW_RLE_base_address) |
| 14505 | continue; |
| 14506 | |
| 14507 | if (!found_base) |
| 14508 | { |
| 14509 | /* We have no valid base address for the ranges |
| 14510 | data. */ |
| 14511 | complaint (&symfile_complaints, |
| 14512 | _("Invalid .debug_rnglists data (no base address)")); |
| 14513 | return false; |
| 14514 | } |
| 14515 | |
| 14516 | if (range_beginning > range_end) |
| 14517 | { |
| 14518 | /* Inverted range entries are invalid. */ |
| 14519 | complaint (&symfile_complaints, |
| 14520 | _("Invalid .debug_rnglists data (inverted range)")); |
| 14521 | return false; |
| 14522 | } |
| 14523 | |
| 14524 | /* Empty range entries have no effect. */ |
| 14525 | if (range_beginning == range_end) |
| 14526 | continue; |
| 14527 | |
| 14528 | range_beginning += base; |
| 14529 | range_end += base; |
| 14530 | |
| 14531 | /* A not-uncommon case of bad debug info. |
| 14532 | Don't pollute the addrmap with bad data. */ |
| 14533 | if (range_beginning + baseaddr == 0 |
| 14534 | && !dwarf2_per_objfile->has_section_at_zero) |
| 14535 | { |
| 14536 | complaint (&symfile_complaints, |
| 14537 | _(".debug_rnglists entry has start address of zero" |
| 14538 | " [in module %s]"), objfile_name (objfile)); |
| 14539 | continue; |
| 14540 | } |
| 14541 | |
| 14542 | callback (range_beginning, range_end); |
| 14543 | } |
| 14544 | |
| 14545 | if (overflow) |
| 14546 | { |
| 14547 | complaint (&symfile_complaints, |
| 14548 | _("Offset %d is not terminated " |
| 14549 | "for DW_AT_ranges attribute"), |
| 14550 | offset); |
| 14551 | return false; |
| 14552 | } |
| 14553 | |
| 14554 | return true; |
| 14555 | } |
| 14556 | |
| 14557 | /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges. |
| 14558 | Callback's type should be: |
| 14559 | void (CORE_ADDR range_beginning, CORE_ADDR range_end) |
| 14560 | Return 1 if the attributes are present and valid, otherwise, return 0. */ |
| 14561 | |
| 14562 | template <typename Callback> |
| 14563 | static int |
| 14564 | dwarf2_ranges_process (unsigned offset, struct dwarf2_cu *cu, |
| 14565 | Callback &&callback) |
| 14566 | { |
| 14567 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 14568 | = cu->per_cu->dwarf2_per_objfile; |
| 14569 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 14570 | struct comp_unit_head *cu_header = &cu->header; |
| 14571 | bfd *obfd = objfile->obfd; |
| 14572 | unsigned int addr_size = cu_header->addr_size; |
| 14573 | CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); |
| 14574 | /* Base address selection entry. */ |
| 14575 | CORE_ADDR base; |
| 14576 | int found_base; |
| 14577 | unsigned int dummy; |
| 14578 | const gdb_byte *buffer; |
| 14579 | CORE_ADDR baseaddr; |
| 14580 | |
| 14581 | if (cu_header->version >= 5) |
| 14582 | return dwarf2_rnglists_process (offset, cu, callback); |
| 14583 | |
| 14584 | found_base = cu->base_known; |
| 14585 | base = cu->base_address; |
| 14586 | |
| 14587 | dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges); |
| 14588 | if (offset >= dwarf2_per_objfile->ranges.size) |
| 14589 | { |
| 14590 | complaint (&symfile_complaints, |
| 14591 | _("Offset %d out of bounds for DW_AT_ranges attribute"), |
| 14592 | offset); |
| 14593 | return 0; |
| 14594 | } |
| 14595 | buffer = dwarf2_per_objfile->ranges.buffer + offset; |
| 14596 | |
| 14597 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
| 14598 | |
| 14599 | while (1) |
| 14600 | { |
| 14601 | CORE_ADDR range_beginning, range_end; |
| 14602 | |
| 14603 | range_beginning = read_address (obfd, buffer, cu, &dummy); |
| 14604 | buffer += addr_size; |
| 14605 | range_end = read_address (obfd, buffer, cu, &dummy); |
| 14606 | buffer += addr_size; |
| 14607 | offset += 2 * addr_size; |
| 14608 | |
| 14609 | /* An end of list marker is a pair of zero addresses. */ |
| 14610 | if (range_beginning == 0 && range_end == 0) |
| 14611 | /* Found the end of list entry. */ |
| 14612 | break; |
| 14613 | |
| 14614 | /* Each base address selection entry is a pair of 2 values. |
| 14615 | The first is the largest possible address, the second is |
| 14616 | the base address. Check for a base address here. */ |
| 14617 | if ((range_beginning & mask) == mask) |
| 14618 | { |
| 14619 | /* If we found the largest possible address, then we already |
| 14620 | have the base address in range_end. */ |
| 14621 | base = range_end; |
| 14622 | found_base = 1; |
| 14623 | continue; |
| 14624 | } |
| 14625 | |
| 14626 | if (!found_base) |
| 14627 | { |
| 14628 | /* We have no valid base address for the ranges |
| 14629 | data. */ |
| 14630 | complaint (&symfile_complaints, |
| 14631 | _("Invalid .debug_ranges data (no base address)")); |
| 14632 | return 0; |
| 14633 | } |
| 14634 | |
| 14635 | if (range_beginning > range_end) |
| 14636 | { |
| 14637 | /* Inverted range entries are invalid. */ |
| 14638 | complaint (&symfile_complaints, |
| 14639 | _("Invalid .debug_ranges data (inverted range)")); |
| 14640 | return 0; |
| 14641 | } |
| 14642 | |
| 14643 | /* Empty range entries have no effect. */ |
| 14644 | if (range_beginning == range_end) |
| 14645 | continue; |
| 14646 | |
| 14647 | range_beginning += base; |
| 14648 | range_end += base; |
| 14649 | |
| 14650 | /* A not-uncommon case of bad debug info. |
| 14651 | Don't pollute the addrmap with bad data. */ |
| 14652 | if (range_beginning + baseaddr == 0 |
| 14653 | && !dwarf2_per_objfile->has_section_at_zero) |
| 14654 | { |
| 14655 | complaint (&symfile_complaints, |
| 14656 | _(".debug_ranges entry has start address of zero" |
| 14657 | " [in module %s]"), objfile_name (objfile)); |
| 14658 | continue; |
| 14659 | } |
| 14660 | |
| 14661 | callback (range_beginning, range_end); |
| 14662 | } |
| 14663 | |
| 14664 | return 1; |
| 14665 | } |
| 14666 | |
| 14667 | /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET. |
| 14668 | Return 1 if the attributes are present and valid, otherwise, return 0. |
| 14669 | If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */ |
| 14670 | |
| 14671 | static int |
| 14672 | dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return, |
| 14673 | CORE_ADDR *high_return, struct dwarf2_cu *cu, |
| 14674 | struct partial_symtab *ranges_pst) |
| 14675 | { |
| 14676 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 14677 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
| 14678 | const CORE_ADDR baseaddr = ANOFFSET (objfile->section_offsets, |
| 14679 | SECT_OFF_TEXT (objfile)); |
| 14680 | int low_set = 0; |
| 14681 | CORE_ADDR low = 0; |
| 14682 | CORE_ADDR high = 0; |
| 14683 | int retval; |
| 14684 | |
| 14685 | retval = dwarf2_ranges_process (offset, cu, |
| 14686 | [&] (CORE_ADDR range_beginning, CORE_ADDR range_end) |
| 14687 | { |
| 14688 | if (ranges_pst != NULL) |
| 14689 | { |
| 14690 | CORE_ADDR lowpc; |
| 14691 | CORE_ADDR highpc; |
| 14692 | |
| 14693 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, |
| 14694 | range_beginning + baseaddr); |
| 14695 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, |
| 14696 | range_end + baseaddr); |
| 14697 | addrmap_set_empty (objfile->psymtabs_addrmap, lowpc, highpc - 1, |
| 14698 | ranges_pst); |
| 14699 | } |
| 14700 | |
| 14701 | /* FIXME: This is recording everything as a low-high |
| 14702 | segment of consecutive addresses. We should have a |
| 14703 | data structure for discontiguous block ranges |
| 14704 | instead. */ |
| 14705 | if (! low_set) |
| 14706 | { |
| 14707 | low = range_beginning; |
| 14708 | high = range_end; |
| 14709 | low_set = 1; |
| 14710 | } |
| 14711 | else |
| 14712 | { |
| 14713 | if (range_beginning < low) |
| 14714 | low = range_beginning; |
| 14715 | if (range_end > high) |
| 14716 | high = range_end; |
| 14717 | } |
| 14718 | }); |
| 14719 | if (!retval) |
| 14720 | return 0; |
| 14721 | |
| 14722 | if (! low_set) |
| 14723 | /* If the first entry is an end-of-list marker, the range |
| 14724 | describes an empty scope, i.e. no instructions. */ |
| 14725 | return 0; |
| 14726 | |
| 14727 | if (low_return) |
| 14728 | *low_return = low; |
| 14729 | if (high_return) |
| 14730 | *high_return = high; |
| 14731 | return 1; |
| 14732 | } |
| 14733 | |
| 14734 | /* Get low and high pc attributes from a die. See enum pc_bounds_kind |
| 14735 | definition for the return value. *LOWPC and *HIGHPC are set iff |
| 14736 | neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */ |
| 14737 | |
| 14738 | static enum pc_bounds_kind |
| 14739 | dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc, |
| 14740 | CORE_ADDR *highpc, struct dwarf2_cu *cu, |
| 14741 | struct partial_symtab *pst) |
| 14742 | { |
| 14743 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 14744 | = cu->per_cu->dwarf2_per_objfile; |
| 14745 | struct attribute *attr; |
| 14746 | struct attribute *attr_high; |
| 14747 | CORE_ADDR low = 0; |
| 14748 | CORE_ADDR high = 0; |
| 14749 | enum pc_bounds_kind ret; |
| 14750 | |
| 14751 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
| 14752 | if (attr_high) |
| 14753 | { |
| 14754 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
| 14755 | if (attr) |
| 14756 | { |
| 14757 | low = attr_value_as_address (attr); |
| 14758 | high = attr_value_as_address (attr_high); |
| 14759 | if (cu->header.version >= 4 && attr_form_is_constant (attr_high)) |
| 14760 | high += low; |
| 14761 | } |
| 14762 | else |
| 14763 | /* Found high w/o low attribute. */ |
| 14764 | return PC_BOUNDS_INVALID; |
| 14765 | |
| 14766 | /* Found consecutive range of addresses. */ |
| 14767 | ret = PC_BOUNDS_HIGH_LOW; |
| 14768 | } |
| 14769 | else |
| 14770 | { |
| 14771 | attr = dwarf2_attr (die, DW_AT_ranges, cu); |
| 14772 | if (attr != NULL) |
| 14773 | { |
| 14774 | /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton. |
| 14775 | We take advantage of the fact that DW_AT_ranges does not appear |
| 14776 | in DW_TAG_compile_unit of DWO files. */ |
| 14777 | int need_ranges_base = die->tag != DW_TAG_compile_unit; |
| 14778 | unsigned int ranges_offset = (DW_UNSND (attr) |
| 14779 | + (need_ranges_base |
| 14780 | ? cu->ranges_base |
| 14781 | : 0)); |
| 14782 | |
| 14783 | /* Value of the DW_AT_ranges attribute is the offset in the |
| 14784 | .debug_ranges section. */ |
| 14785 | if (!dwarf2_ranges_read (ranges_offset, &low, &high, cu, pst)) |
| 14786 | return PC_BOUNDS_INVALID; |
| 14787 | /* Found discontinuous range of addresses. */ |
| 14788 | ret = PC_BOUNDS_RANGES; |
| 14789 | } |
| 14790 | else |
| 14791 | return PC_BOUNDS_NOT_PRESENT; |
| 14792 | } |
| 14793 | |
| 14794 | /* read_partial_die has also the strict LOW < HIGH requirement. */ |
| 14795 | if (high <= low) |
| 14796 | return PC_BOUNDS_INVALID; |
| 14797 | |
| 14798 | /* When using the GNU linker, .gnu.linkonce. sections are used to |
| 14799 | eliminate duplicate copies of functions and vtables and such. |
| 14800 | The linker will arbitrarily choose one and discard the others. |
| 14801 | The AT_*_pc values for such functions refer to local labels in |
| 14802 | these sections. If the section from that file was discarded, the |
| 14803 | labels are not in the output, so the relocs get a value of 0. |
| 14804 | If this is a discarded function, mark the pc bounds as invalid, |
| 14805 | so that GDB will ignore it. */ |
| 14806 | if (low == 0 && !dwarf2_per_objfile->has_section_at_zero) |
| 14807 | return PC_BOUNDS_INVALID; |
| 14808 | |
| 14809 | *lowpc = low; |
| 14810 | if (highpc) |
| 14811 | *highpc = high; |
| 14812 | return ret; |
| 14813 | } |
| 14814 | |
| 14815 | /* Assuming that DIE represents a subprogram DIE or a lexical block, get |
| 14816 | its low and high PC addresses. Do nothing if these addresses could not |
| 14817 | be determined. Otherwise, set LOWPC to the low address if it is smaller, |
| 14818 | and HIGHPC to the high address if greater than HIGHPC. */ |
| 14819 | |
| 14820 | static void |
| 14821 | dwarf2_get_subprogram_pc_bounds (struct die_info *die, |
| 14822 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
| 14823 | struct dwarf2_cu *cu) |
| 14824 | { |
| 14825 | CORE_ADDR low, high; |
| 14826 | struct die_info *child = die->child; |
| 14827 | |
| 14828 | if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL) >= PC_BOUNDS_RANGES) |
| 14829 | { |
| 14830 | *lowpc = std::min (*lowpc, low); |
| 14831 | *highpc = std::max (*highpc, high); |
| 14832 | } |
| 14833 | |
| 14834 | /* If the language does not allow nested subprograms (either inside |
| 14835 | subprograms or lexical blocks), we're done. */ |
| 14836 | if (cu->language != language_ada) |
| 14837 | return; |
| 14838 | |
| 14839 | /* Check all the children of the given DIE. If it contains nested |
| 14840 | subprograms, then check their pc bounds. Likewise, we need to |
| 14841 | check lexical blocks as well, as they may also contain subprogram |
| 14842 | definitions. */ |
| 14843 | while (child && child->tag) |
| 14844 | { |
| 14845 | if (child->tag == DW_TAG_subprogram |
| 14846 | || child->tag == DW_TAG_lexical_block) |
| 14847 | dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu); |
| 14848 | child = sibling_die (child); |
| 14849 | } |
| 14850 | } |
| 14851 | |
| 14852 | /* Get the low and high pc's represented by the scope DIE, and store |
| 14853 | them in *LOWPC and *HIGHPC. If the correct values can't be |
| 14854 | determined, set *LOWPC to -1 and *HIGHPC to 0. */ |
| 14855 | |
| 14856 | static void |
| 14857 | get_scope_pc_bounds (struct die_info *die, |
| 14858 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
| 14859 | struct dwarf2_cu *cu) |
| 14860 | { |
| 14861 | CORE_ADDR best_low = (CORE_ADDR) -1; |
| 14862 | CORE_ADDR best_high = (CORE_ADDR) 0; |
| 14863 | CORE_ADDR current_low, current_high; |
| 14864 | |
| 14865 | if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL) |
| 14866 | >= PC_BOUNDS_RANGES) |
| 14867 | { |
| 14868 | best_low = current_low; |
| 14869 | best_high = current_high; |
| 14870 | } |
| 14871 | else |
| 14872 | { |
| 14873 | struct die_info *child = die->child; |
| 14874 | |
| 14875 | while (child && child->tag) |
| 14876 | { |
| 14877 | switch (child->tag) { |
| 14878 | case DW_TAG_subprogram: |
| 14879 | dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu); |
| 14880 | break; |
| 14881 | case DW_TAG_namespace: |
| 14882 | case DW_TAG_module: |
| 14883 | /* FIXME: carlton/2004-01-16: Should we do this for |
| 14884 | DW_TAG_class_type/DW_TAG_structure_type, too? I think |
| 14885 | that current GCC's always emit the DIEs corresponding |
| 14886 | to definitions of methods of classes as children of a |
| 14887 | DW_TAG_compile_unit or DW_TAG_namespace (as opposed to |
| 14888 | the DIEs giving the declarations, which could be |
| 14889 | anywhere). But I don't see any reason why the |
| 14890 | standards says that they have to be there. */ |
| 14891 | get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu); |
| 14892 | |
| 14893 | if (current_low != ((CORE_ADDR) -1)) |
| 14894 | { |
| 14895 | best_low = std::min (best_low, current_low); |
| 14896 | best_high = std::max (best_high, current_high); |
| 14897 | } |
| 14898 | break; |
| 14899 | default: |
| 14900 | /* Ignore. */ |
| 14901 | break; |
| 14902 | } |
| 14903 | |
| 14904 | child = sibling_die (child); |
| 14905 | } |
| 14906 | } |
| 14907 | |
| 14908 | *lowpc = best_low; |
| 14909 | *highpc = best_high; |
| 14910 | } |
| 14911 | |
| 14912 | /* Record the address ranges for BLOCK, offset by BASEADDR, as given |
| 14913 | in DIE. */ |
| 14914 | |
| 14915 | static void |
| 14916 | dwarf2_record_block_ranges (struct die_info *die, struct block *block, |
| 14917 | CORE_ADDR baseaddr, struct dwarf2_cu *cu) |
| 14918 | { |
| 14919 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 14920 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
| 14921 | struct attribute *attr; |
| 14922 | struct attribute *attr_high; |
| 14923 | |
| 14924 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
| 14925 | if (attr_high) |
| 14926 | { |
| 14927 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
| 14928 | if (attr) |
| 14929 | { |
| 14930 | CORE_ADDR low = attr_value_as_address (attr); |
| 14931 | CORE_ADDR high = attr_value_as_address (attr_high); |
| 14932 | |
| 14933 | if (cu->header.version >= 4 && attr_form_is_constant (attr_high)) |
| 14934 | high += low; |
| 14935 | |
| 14936 | low = gdbarch_adjust_dwarf2_addr (gdbarch, low + baseaddr); |
| 14937 | high = gdbarch_adjust_dwarf2_addr (gdbarch, high + baseaddr); |
| 14938 | record_block_range (block, low, high - 1); |
| 14939 | } |
| 14940 | } |
| 14941 | |
| 14942 | attr = dwarf2_attr (die, DW_AT_ranges, cu); |
| 14943 | if (attr) |
| 14944 | { |
| 14945 | /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton. |
| 14946 | We take advantage of the fact that DW_AT_ranges does not appear |
| 14947 | in DW_TAG_compile_unit of DWO files. */ |
| 14948 | int need_ranges_base = die->tag != DW_TAG_compile_unit; |
| 14949 | |
| 14950 | /* The value of the DW_AT_ranges attribute is the offset of the |
| 14951 | address range list in the .debug_ranges section. */ |
| 14952 | unsigned long offset = (DW_UNSND (attr) |
| 14953 | + (need_ranges_base ? cu->ranges_base : 0)); |
| 14954 | const gdb_byte *buffer; |
| 14955 | |
| 14956 | /* For some target architectures, but not others, the |
| 14957 | read_address function sign-extends the addresses it returns. |
| 14958 | To recognize base address selection entries, we need a |
| 14959 | mask. */ |
| 14960 | unsigned int addr_size = cu->header.addr_size; |
| 14961 | CORE_ADDR base_select_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); |
| 14962 | |
| 14963 | /* The base address, to which the next pair is relative. Note |
| 14964 | that this 'base' is a DWARF concept: most entries in a range |
| 14965 | list are relative, to reduce the number of relocs against the |
| 14966 | debugging information. This is separate from this function's |
| 14967 | 'baseaddr' argument, which GDB uses to relocate debugging |
| 14968 | information from a shared library based on the address at |
| 14969 | which the library was loaded. */ |
| 14970 | CORE_ADDR base = cu->base_address; |
| 14971 | int base_known = cu->base_known; |
| 14972 | |
| 14973 | dwarf2_ranges_process (offset, cu, |
| 14974 | [&] (CORE_ADDR start, CORE_ADDR end) |
| 14975 | { |
| 14976 | start += baseaddr; |
| 14977 | end += baseaddr; |
| 14978 | start = gdbarch_adjust_dwarf2_addr (gdbarch, start); |
| 14979 | end = gdbarch_adjust_dwarf2_addr (gdbarch, end); |
| 14980 | record_block_range (block, start, end - 1); |
| 14981 | }); |
| 14982 | } |
| 14983 | } |
| 14984 | |
| 14985 | /* Check whether the producer field indicates either of GCC < 4.6, or the |
| 14986 | Intel C/C++ compiler, and cache the result in CU. */ |
| 14987 | |
| 14988 | static void |
| 14989 | check_producer (struct dwarf2_cu *cu) |
| 14990 | { |
| 14991 | int major, minor; |
| 14992 | |
| 14993 | if (cu->producer == NULL) |
| 14994 | { |
| 14995 | /* For unknown compilers expect their behavior is DWARF version |
| 14996 | compliant. |
| 14997 | |
| 14998 | GCC started to support .debug_types sections by -gdwarf-4 since |
| 14999 | gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer |
| 15000 | for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4 |
| 15001 | combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility |
| 15002 | interpreted incorrectly by GDB now - GCC PR debug/48229. */ |
| 15003 | } |
| 15004 | else if (producer_is_gcc (cu->producer, &major, &minor)) |
| 15005 | { |
| 15006 | cu->producer_is_gxx_lt_4_6 = major < 4 || (major == 4 && minor < 6); |
| 15007 | cu->producer_is_gcc_lt_4_3 = major < 4 || (major == 4 && minor < 3); |
| 15008 | } |
| 15009 | else if (producer_is_icc (cu->producer, &major, &minor)) |
| 15010 | cu->producer_is_icc_lt_14 = major < 14; |
| 15011 | else |
| 15012 | { |
| 15013 | /* For other non-GCC compilers, expect their behavior is DWARF version |
| 15014 | compliant. */ |
| 15015 | } |
| 15016 | |
| 15017 | cu->checked_producer = 1; |
| 15018 | } |
| 15019 | |
| 15020 | /* Check for GCC PR debug/45124 fix which is not present in any G++ version up |
| 15021 | to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed |
| 15022 | during 4.6.0 experimental. */ |
| 15023 | |
| 15024 | static int |
| 15025 | producer_is_gxx_lt_4_6 (struct dwarf2_cu *cu) |
| 15026 | { |
| 15027 | if (!cu->checked_producer) |
| 15028 | check_producer (cu); |
| 15029 | |
| 15030 | return cu->producer_is_gxx_lt_4_6; |
| 15031 | } |
| 15032 | |
| 15033 | /* Return the default accessibility type if it is not overriden by |
| 15034 | DW_AT_accessibility. */ |
| 15035 | |
| 15036 | static enum dwarf_access_attribute |
| 15037 | dwarf2_default_access_attribute (struct die_info *die, struct dwarf2_cu *cu) |
| 15038 | { |
| 15039 | if (cu->header.version < 3 || producer_is_gxx_lt_4_6 (cu)) |
| 15040 | { |
| 15041 | /* The default DWARF 2 accessibility for members is public, the default |
| 15042 | accessibility for inheritance is private. */ |
| 15043 | |
| 15044 | if (die->tag != DW_TAG_inheritance) |
| 15045 | return DW_ACCESS_public; |
| 15046 | else |
| 15047 | return DW_ACCESS_private; |
| 15048 | } |
| 15049 | else |
| 15050 | { |
| 15051 | /* DWARF 3+ defines the default accessibility a different way. The same |
| 15052 | rules apply now for DW_TAG_inheritance as for the members and it only |
| 15053 | depends on the container kind. */ |
| 15054 | |
| 15055 | if (die->parent->tag == DW_TAG_class_type) |
| 15056 | return DW_ACCESS_private; |
| 15057 | else |
| 15058 | return DW_ACCESS_public; |
| 15059 | } |
| 15060 | } |
| 15061 | |
| 15062 | /* Look for DW_AT_data_member_location. Set *OFFSET to the byte |
| 15063 | offset. If the attribute was not found return 0, otherwise return |
| 15064 | 1. If it was found but could not properly be handled, set *OFFSET |
| 15065 | to 0. */ |
| 15066 | |
| 15067 | static int |
| 15068 | handle_data_member_location (struct die_info *die, struct dwarf2_cu *cu, |
| 15069 | LONGEST *offset) |
| 15070 | { |
| 15071 | struct attribute *attr; |
| 15072 | |
| 15073 | attr = dwarf2_attr (die, DW_AT_data_member_location, cu); |
| 15074 | if (attr != NULL) |
| 15075 | { |
| 15076 | *offset = 0; |
| 15077 | |
| 15078 | /* Note that we do not check for a section offset first here. |
| 15079 | This is because DW_AT_data_member_location is new in DWARF 4, |
| 15080 | so if we see it, we can assume that a constant form is really |
| 15081 | a constant and not a section offset. */ |
| 15082 | if (attr_form_is_constant (attr)) |
| 15083 | *offset = dwarf2_get_attr_constant_value (attr, 0); |
| 15084 | else if (attr_form_is_section_offset (attr)) |
| 15085 | dwarf2_complex_location_expr_complaint (); |
| 15086 | else if (attr_form_is_block (attr)) |
| 15087 | *offset = decode_locdesc (DW_BLOCK (attr), cu); |
| 15088 | else |
| 15089 | dwarf2_complex_location_expr_complaint (); |
| 15090 | |
| 15091 | return 1; |
| 15092 | } |
| 15093 | |
| 15094 | return 0; |
| 15095 | } |
| 15096 | |
| 15097 | /* Add an aggregate field to the field list. */ |
| 15098 | |
| 15099 | static void |
| 15100 | dwarf2_add_field (struct field_info *fip, struct die_info *die, |
| 15101 | struct dwarf2_cu *cu) |
| 15102 | { |
| 15103 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 15104 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
| 15105 | struct nextfield *new_field; |
| 15106 | struct attribute *attr; |
| 15107 | struct field *fp; |
| 15108 | const char *fieldname = ""; |
| 15109 | |
| 15110 | /* Allocate a new field list entry and link it in. */ |
| 15111 | new_field = XNEW (struct nextfield); |
| 15112 | make_cleanup (xfree, new_field); |
| 15113 | memset (new_field, 0, sizeof (struct nextfield)); |
| 15114 | |
| 15115 | if (die->tag == DW_TAG_inheritance) |
| 15116 | { |
| 15117 | new_field->next = fip->baseclasses; |
| 15118 | fip->baseclasses = new_field; |
| 15119 | } |
| 15120 | else |
| 15121 | { |
| 15122 | new_field->next = fip->fields; |
| 15123 | fip->fields = new_field; |
| 15124 | } |
| 15125 | fip->nfields++; |
| 15126 | |
| 15127 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
| 15128 | if (attr) |
| 15129 | new_field->accessibility = DW_UNSND (attr); |
| 15130 | else |
| 15131 | new_field->accessibility = dwarf2_default_access_attribute (die, cu); |
| 15132 | if (new_field->accessibility != DW_ACCESS_public) |
| 15133 | fip->non_public_fields = 1; |
| 15134 | |
| 15135 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); |
| 15136 | if (attr) |
| 15137 | new_field->virtuality = DW_UNSND (attr); |
| 15138 | else |
| 15139 | new_field->virtuality = DW_VIRTUALITY_none; |
| 15140 | |
| 15141 | fp = &new_field->field; |
| 15142 | |
| 15143 | if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu)) |
| 15144 | { |
| 15145 | LONGEST offset; |
| 15146 | |
| 15147 | /* Data member other than a C++ static data member. */ |
| 15148 | |
| 15149 | /* Get type of field. */ |
| 15150 | fp->type = die_type (die, cu); |
| 15151 | |
| 15152 | SET_FIELD_BITPOS (*fp, 0); |
| 15153 | |
| 15154 | /* Get bit size of field (zero if none). */ |
| 15155 | attr = dwarf2_attr (die, DW_AT_bit_size, cu); |
| 15156 | if (attr) |
| 15157 | { |
| 15158 | FIELD_BITSIZE (*fp) = DW_UNSND (attr); |
| 15159 | } |
| 15160 | else |
| 15161 | { |
| 15162 | FIELD_BITSIZE (*fp) = 0; |
| 15163 | } |
| 15164 | |
| 15165 | /* Get bit offset of field. */ |
| 15166 | if (handle_data_member_location (die, cu, &offset)) |
| 15167 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); |
| 15168 | attr = dwarf2_attr (die, DW_AT_bit_offset, cu); |
| 15169 | if (attr) |
| 15170 | { |
| 15171 | if (gdbarch_bits_big_endian (gdbarch)) |
| 15172 | { |
| 15173 | /* For big endian bits, the DW_AT_bit_offset gives the |
| 15174 | additional bit offset from the MSB of the containing |
| 15175 | anonymous object to the MSB of the field. We don't |
| 15176 | have to do anything special since we don't need to |
| 15177 | know the size of the anonymous object. */ |
| 15178 | SET_FIELD_BITPOS (*fp, FIELD_BITPOS (*fp) + DW_UNSND (attr)); |
| 15179 | } |
| 15180 | else |
| 15181 | { |
| 15182 | /* For little endian bits, compute the bit offset to the |
| 15183 | MSB of the anonymous object, subtract off the number of |
| 15184 | bits from the MSB of the field to the MSB of the |
| 15185 | object, and then subtract off the number of bits of |
| 15186 | the field itself. The result is the bit offset of |
| 15187 | the LSB of the field. */ |
| 15188 | int anonymous_size; |
| 15189 | int bit_offset = DW_UNSND (attr); |
| 15190 | |
| 15191 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
| 15192 | if (attr) |
| 15193 | { |
| 15194 | /* The size of the anonymous object containing |
| 15195 | the bit field is explicit, so use the |
| 15196 | indicated size (in bytes). */ |
| 15197 | anonymous_size = DW_UNSND (attr); |
| 15198 | } |
| 15199 | else |
| 15200 | { |
| 15201 | /* The size of the anonymous object containing |
| 15202 | the bit field must be inferred from the type |
| 15203 | attribute of the data member containing the |
| 15204 | bit field. */ |
| 15205 | anonymous_size = TYPE_LENGTH (fp->type); |
| 15206 | } |
| 15207 | SET_FIELD_BITPOS (*fp, |
| 15208 | (FIELD_BITPOS (*fp) |
| 15209 | + anonymous_size * bits_per_byte |
| 15210 | - bit_offset - FIELD_BITSIZE (*fp))); |
| 15211 | } |
| 15212 | } |
| 15213 | attr = dwarf2_attr (die, DW_AT_data_bit_offset, cu); |
| 15214 | if (attr != NULL) |
| 15215 | SET_FIELD_BITPOS (*fp, (FIELD_BITPOS (*fp) |
| 15216 | + dwarf2_get_attr_constant_value (attr, 0))); |
| 15217 | |
| 15218 | /* Get name of field. */ |
| 15219 | fieldname = dwarf2_name (die, cu); |
| 15220 | if (fieldname == NULL) |
| 15221 | fieldname = ""; |
| 15222 | |
| 15223 | /* The name is already allocated along with this objfile, so we don't |
| 15224 | need to duplicate it for the type. */ |
| 15225 | fp->name = fieldname; |
| 15226 | |
| 15227 | /* Change accessibility for artificial fields (e.g. virtual table |
| 15228 | pointer or virtual base class pointer) to private. */ |
| 15229 | if (dwarf2_attr (die, DW_AT_artificial, cu)) |
| 15230 | { |
| 15231 | FIELD_ARTIFICIAL (*fp) = 1; |
| 15232 | new_field->accessibility = DW_ACCESS_private; |
| 15233 | fip->non_public_fields = 1; |
| 15234 | } |
| 15235 | } |
| 15236 | else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable) |
| 15237 | { |
| 15238 | /* C++ static member. */ |
| 15239 | |
| 15240 | /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that |
| 15241 | is a declaration, but all versions of G++ as of this writing |
| 15242 | (so through at least 3.2.1) incorrectly generate |
| 15243 | DW_TAG_variable tags. */ |
| 15244 | |
| 15245 | const char *physname; |
| 15246 | |
| 15247 | /* Get name of field. */ |
| 15248 | fieldname = dwarf2_name (die, cu); |
| 15249 | if (fieldname == NULL) |
| 15250 | return; |
| 15251 | |
| 15252 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
| 15253 | if (attr |
| 15254 | /* Only create a symbol if this is an external value. |
| 15255 | new_symbol checks this and puts the value in the global symbol |
| 15256 | table, which we want. If it is not external, new_symbol |
| 15257 | will try to put the value in cu->list_in_scope which is wrong. */ |
| 15258 | && dwarf2_flag_true_p (die, DW_AT_external, cu)) |
| 15259 | { |
| 15260 | /* A static const member, not much different than an enum as far as |
| 15261 | we're concerned, except that we can support more types. */ |
| 15262 | new_symbol (die, NULL, cu); |
| 15263 | } |
| 15264 | |
| 15265 | /* Get physical name. */ |
| 15266 | physname = dwarf2_physname (fieldname, die, cu); |
| 15267 | |
| 15268 | /* The name is already allocated along with this objfile, so we don't |
| 15269 | need to duplicate it for the type. */ |
| 15270 | SET_FIELD_PHYSNAME (*fp, physname ? physname : ""); |
| 15271 | FIELD_TYPE (*fp) = die_type (die, cu); |
| 15272 | FIELD_NAME (*fp) = fieldname; |
| 15273 | } |
| 15274 | else if (die->tag == DW_TAG_inheritance) |
| 15275 | { |
| 15276 | LONGEST offset; |
| 15277 | |
| 15278 | /* C++ base class field. */ |
| 15279 | if (handle_data_member_location (die, cu, &offset)) |
| 15280 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); |
| 15281 | FIELD_BITSIZE (*fp) = 0; |
| 15282 | FIELD_TYPE (*fp) = die_type (die, cu); |
| 15283 | FIELD_NAME (*fp) = type_name_no_tag (fp->type); |
| 15284 | fip->nbaseclasses++; |
| 15285 | } |
| 15286 | } |
| 15287 | |
| 15288 | /* Can the type given by DIE define another type? */ |
| 15289 | |
| 15290 | static bool |
| 15291 | type_can_define_types (const struct die_info *die) |
| 15292 | { |
| 15293 | switch (die->tag) |
| 15294 | { |
| 15295 | case DW_TAG_typedef: |
| 15296 | case DW_TAG_class_type: |
| 15297 | case DW_TAG_structure_type: |
| 15298 | case DW_TAG_union_type: |
| 15299 | case DW_TAG_enumeration_type: |
| 15300 | return true; |
| 15301 | |
| 15302 | default: |
| 15303 | return false; |
| 15304 | } |
| 15305 | } |
| 15306 | |
| 15307 | /* Add a type definition defined in the scope of the FIP's class. */ |
| 15308 | |
| 15309 | static void |
| 15310 | dwarf2_add_type_defn (struct field_info *fip, struct die_info *die, |
| 15311 | struct dwarf2_cu *cu) |
| 15312 | { |
| 15313 | struct decl_field_list *new_field; |
| 15314 | struct decl_field *fp; |
| 15315 | |
| 15316 | /* Allocate a new field list entry and link it in. */ |
| 15317 | new_field = XCNEW (struct decl_field_list); |
| 15318 | make_cleanup (xfree, new_field); |
| 15319 | |
| 15320 | gdb_assert (type_can_define_types (die)); |
| 15321 | |
| 15322 | fp = &new_field->field; |
| 15323 | |
| 15324 | /* Get name of field. NULL is okay here, meaning an anonymous type. */ |
| 15325 | fp->name = dwarf2_name (die, cu); |
| 15326 | fp->type = read_type_die (die, cu); |
| 15327 | |
| 15328 | /* Save accessibility. */ |
| 15329 | enum dwarf_access_attribute accessibility; |
| 15330 | struct attribute *attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
| 15331 | if (attr != NULL) |
| 15332 | accessibility = (enum dwarf_access_attribute) DW_UNSND (attr); |
| 15333 | else |
| 15334 | accessibility = dwarf2_default_access_attribute (die, cu); |
| 15335 | switch (accessibility) |
| 15336 | { |
| 15337 | case DW_ACCESS_public: |
| 15338 | /* The assumed value if neither private nor protected. */ |
| 15339 | break; |
| 15340 | case DW_ACCESS_private: |
| 15341 | fp->is_private = 1; |
| 15342 | break; |
| 15343 | case DW_ACCESS_protected: |
| 15344 | fp->is_protected = 1; |
| 15345 | break; |
| 15346 | default: |
| 15347 | complaint (&symfile_complaints, |
| 15348 | _("Unhandled DW_AT_accessibility value (%x)"), accessibility); |
| 15349 | } |
| 15350 | |
| 15351 | if (die->tag == DW_TAG_typedef) |
| 15352 | { |
| 15353 | new_field->next = fip->typedef_field_list; |
| 15354 | fip->typedef_field_list = new_field; |
| 15355 | fip->typedef_field_list_count++; |
| 15356 | } |
| 15357 | else |
| 15358 | { |
| 15359 | new_field->next = fip->nested_types_list; |
| 15360 | fip->nested_types_list = new_field; |
| 15361 | fip->nested_types_list_count++; |
| 15362 | } |
| 15363 | } |
| 15364 | |
| 15365 | /* Create the vector of fields, and attach it to the type. */ |
| 15366 | |
| 15367 | static void |
| 15368 | dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type, |
| 15369 | struct dwarf2_cu *cu) |
| 15370 | { |
| 15371 | int nfields = fip->nfields; |
| 15372 | |
| 15373 | /* Record the field count, allocate space for the array of fields, |
| 15374 | and create blank accessibility bitfields if necessary. */ |
| 15375 | TYPE_NFIELDS (type) = nfields; |
| 15376 | TYPE_FIELDS (type) = (struct field *) |
| 15377 | TYPE_ALLOC (type, sizeof (struct field) * nfields); |
| 15378 | memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields); |
| 15379 | |
| 15380 | if (fip->non_public_fields && cu->language != language_ada) |
| 15381 | { |
| 15382 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
| 15383 | |
| 15384 | TYPE_FIELD_PRIVATE_BITS (type) = |
| 15385 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); |
| 15386 | B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields); |
| 15387 | |
| 15388 | TYPE_FIELD_PROTECTED_BITS (type) = |
| 15389 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); |
| 15390 | B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields); |
| 15391 | |
| 15392 | TYPE_FIELD_IGNORE_BITS (type) = |
| 15393 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); |
| 15394 | B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields); |
| 15395 | } |
| 15396 | |
| 15397 | /* If the type has baseclasses, allocate and clear a bit vector for |
| 15398 | TYPE_FIELD_VIRTUAL_BITS. */ |
| 15399 | if (fip->nbaseclasses && cu->language != language_ada) |
| 15400 | { |
| 15401 | int num_bytes = B_BYTES (fip->nbaseclasses); |
| 15402 | unsigned char *pointer; |
| 15403 | |
| 15404 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
| 15405 | pointer = (unsigned char *) TYPE_ALLOC (type, num_bytes); |
| 15406 | TYPE_FIELD_VIRTUAL_BITS (type) = pointer; |
| 15407 | B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses); |
| 15408 | TYPE_N_BASECLASSES (type) = fip->nbaseclasses; |
| 15409 | } |
| 15410 | |
| 15411 | /* Copy the saved-up fields into the field vector. Start from the head of |
| 15412 | the list, adding to the tail of the field array, so that they end up in |
| 15413 | the same order in the array in which they were added to the list. */ |
| 15414 | while (nfields-- > 0) |
| 15415 | { |
| 15416 | struct nextfield *fieldp; |
| 15417 | |
| 15418 | if (fip->fields) |
| 15419 | { |
| 15420 | fieldp = fip->fields; |
| 15421 | fip->fields = fieldp->next; |
| 15422 | } |
| 15423 | else |
| 15424 | { |
| 15425 | fieldp = fip->baseclasses; |
| 15426 | fip->baseclasses = fieldp->next; |
| 15427 | } |
| 15428 | |
| 15429 | TYPE_FIELD (type, nfields) = fieldp->field; |
| 15430 | switch (fieldp->accessibility) |
| 15431 | { |
| 15432 | case DW_ACCESS_private: |
| 15433 | if (cu->language != language_ada) |
| 15434 | SET_TYPE_FIELD_PRIVATE (type, nfields); |
| 15435 | break; |
| 15436 | |
| 15437 | case DW_ACCESS_protected: |
| 15438 | if (cu->language != language_ada) |
| 15439 | SET_TYPE_FIELD_PROTECTED (type, nfields); |
| 15440 | break; |
| 15441 | |
| 15442 | case DW_ACCESS_public: |
| 15443 | break; |
| 15444 | |
| 15445 | default: |
| 15446 | /* Unknown accessibility. Complain and treat it as public. */ |
| 15447 | { |
| 15448 | complaint (&symfile_complaints, _("unsupported accessibility %d"), |
| 15449 | fieldp->accessibility); |
| 15450 | } |
| 15451 | break; |
| 15452 | } |
| 15453 | if (nfields < fip->nbaseclasses) |
| 15454 | { |
| 15455 | switch (fieldp->virtuality) |
| 15456 | { |
| 15457 | case DW_VIRTUALITY_virtual: |
| 15458 | case DW_VIRTUALITY_pure_virtual: |
| 15459 | if (cu->language == language_ada) |
| 15460 | error (_("unexpected virtuality in component of Ada type")); |
| 15461 | SET_TYPE_FIELD_VIRTUAL (type, nfields); |
| 15462 | break; |
| 15463 | } |
| 15464 | } |
| 15465 | } |
| 15466 | } |
| 15467 | |
| 15468 | /* Return true if this member function is a constructor, false |
| 15469 | otherwise. */ |
| 15470 | |
| 15471 | static int |
| 15472 | dwarf2_is_constructor (struct die_info *die, struct dwarf2_cu *cu) |
| 15473 | { |
| 15474 | const char *fieldname; |
| 15475 | const char *type_name; |
| 15476 | int len; |
| 15477 | |
| 15478 | if (die->parent == NULL) |
| 15479 | return 0; |
| 15480 | |
| 15481 | if (die->parent->tag != DW_TAG_structure_type |
| 15482 | && die->parent->tag != DW_TAG_union_type |
| 15483 | && die->parent->tag != DW_TAG_class_type) |
| 15484 | return 0; |
| 15485 | |
| 15486 | fieldname = dwarf2_name (die, cu); |
| 15487 | type_name = dwarf2_name (die->parent, cu); |
| 15488 | if (fieldname == NULL || type_name == NULL) |
| 15489 | return 0; |
| 15490 | |
| 15491 | len = strlen (fieldname); |
| 15492 | return (strncmp (fieldname, type_name, len) == 0 |
| 15493 | && (type_name[len] == '\0' || type_name[len] == '<')); |
| 15494 | } |
| 15495 | |
| 15496 | /* Add a member function to the proper fieldlist. */ |
| 15497 | |
| 15498 | static void |
| 15499 | dwarf2_add_member_fn (struct field_info *fip, struct die_info *die, |
| 15500 | struct type *type, struct dwarf2_cu *cu) |
| 15501 | { |
| 15502 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 15503 | struct attribute *attr; |
| 15504 | struct fnfieldlist *flp; |
| 15505 | int i; |
| 15506 | struct fn_field *fnp; |
| 15507 | const char *fieldname; |
| 15508 | struct nextfnfield *new_fnfield; |
| 15509 | struct type *this_type; |
| 15510 | enum dwarf_access_attribute accessibility; |
| 15511 | |
| 15512 | if (cu->language == language_ada) |
| 15513 | error (_("unexpected member function in Ada type")); |
| 15514 | |
| 15515 | /* Get name of member function. */ |
| 15516 | fieldname = dwarf2_name (die, cu); |
| 15517 | if (fieldname == NULL) |
| 15518 | return; |
| 15519 | |
| 15520 | /* Look up member function name in fieldlist. */ |
| 15521 | for (i = 0; i < fip->nfnfields; i++) |
| 15522 | { |
| 15523 | if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0) |
| 15524 | break; |
| 15525 | } |
| 15526 | |
| 15527 | /* Create new list element if necessary. */ |
| 15528 | if (i < fip->nfnfields) |
| 15529 | flp = &fip->fnfieldlists[i]; |
| 15530 | else |
| 15531 | { |
| 15532 | if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0) |
| 15533 | { |
| 15534 | fip->fnfieldlists = (struct fnfieldlist *) |
| 15535 | xrealloc (fip->fnfieldlists, |
| 15536 | (fip->nfnfields + DW_FIELD_ALLOC_CHUNK) |
| 15537 | * sizeof (struct fnfieldlist)); |
| 15538 | if (fip->nfnfields == 0) |
| 15539 | make_cleanup (free_current_contents, &fip->fnfieldlists); |
| 15540 | } |
| 15541 | flp = &fip->fnfieldlists[fip->nfnfields]; |
| 15542 | flp->name = fieldname; |
| 15543 | flp->length = 0; |
| 15544 | flp->head = NULL; |
| 15545 | i = fip->nfnfields++; |
| 15546 | } |
| 15547 | |
| 15548 | /* Create a new member function field and chain it to the field list |
| 15549 | entry. */ |
| 15550 | new_fnfield = XNEW (struct nextfnfield); |
| 15551 | make_cleanup (xfree, new_fnfield); |
| 15552 | memset (new_fnfield, 0, sizeof (struct nextfnfield)); |
| 15553 | new_fnfield->next = flp->head; |
| 15554 | flp->head = new_fnfield; |
| 15555 | flp->length++; |
| 15556 | |
| 15557 | /* Fill in the member function field info. */ |
| 15558 | fnp = &new_fnfield->fnfield; |
| 15559 | |
| 15560 | /* Delay processing of the physname until later. */ |
| 15561 | if (cu->language == language_cplus) |
| 15562 | { |
| 15563 | add_to_method_list (type, i, flp->length - 1, fieldname, |
| 15564 | die, cu); |
| 15565 | } |
| 15566 | else |
| 15567 | { |
| 15568 | const char *physname = dwarf2_physname (fieldname, die, cu); |
| 15569 | fnp->physname = physname ? physname : ""; |
| 15570 | } |
| 15571 | |
| 15572 | fnp->type = alloc_type (objfile); |
| 15573 | this_type = read_type_die (die, cu); |
| 15574 | if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC) |
| 15575 | { |
| 15576 | int nparams = TYPE_NFIELDS (this_type); |
| 15577 | |
| 15578 | /* TYPE is the domain of this method, and THIS_TYPE is the type |
| 15579 | of the method itself (TYPE_CODE_METHOD). */ |
| 15580 | smash_to_method_type (fnp->type, type, |
| 15581 | TYPE_TARGET_TYPE (this_type), |
| 15582 | TYPE_FIELDS (this_type), |
| 15583 | TYPE_NFIELDS (this_type), |
| 15584 | TYPE_VARARGS (this_type)); |
| 15585 | |
| 15586 | /* Handle static member functions. |
| 15587 | Dwarf2 has no clean way to discern C++ static and non-static |
| 15588 | member functions. G++ helps GDB by marking the first |
| 15589 | parameter for non-static member functions (which is the this |
| 15590 | pointer) as artificial. We obtain this information from |
| 15591 | read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */ |
| 15592 | if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0) |
| 15593 | fnp->voffset = VOFFSET_STATIC; |
| 15594 | } |
| 15595 | else |
| 15596 | complaint (&symfile_complaints, _("member function type missing for '%s'"), |
| 15597 | dwarf2_full_name (fieldname, die, cu)); |
| 15598 | |
| 15599 | /* Get fcontext from DW_AT_containing_type if present. */ |
| 15600 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
| 15601 | fnp->fcontext = die_containing_type (die, cu); |
| 15602 | |
| 15603 | /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and |
| 15604 | is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */ |
| 15605 | |
| 15606 | /* Get accessibility. */ |
| 15607 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
| 15608 | if (attr) |
| 15609 | accessibility = (enum dwarf_access_attribute) DW_UNSND (attr); |
| 15610 | else |
| 15611 | accessibility = dwarf2_default_access_attribute (die, cu); |
| 15612 | switch (accessibility) |
| 15613 | { |
| 15614 | case DW_ACCESS_private: |
| 15615 | fnp->is_private = 1; |
| 15616 | break; |
| 15617 | case DW_ACCESS_protected: |
| 15618 | fnp->is_protected = 1; |
| 15619 | break; |
| 15620 | } |
| 15621 | |
| 15622 | /* Check for artificial methods. */ |
| 15623 | attr = dwarf2_attr (die, DW_AT_artificial, cu); |
| 15624 | if (attr && DW_UNSND (attr) != 0) |
| 15625 | fnp->is_artificial = 1; |
| 15626 | |
| 15627 | fnp->is_constructor = dwarf2_is_constructor (die, cu); |
| 15628 | |
| 15629 | /* Get index in virtual function table if it is a virtual member |
| 15630 | function. For older versions of GCC, this is an offset in the |
| 15631 | appropriate virtual table, as specified by DW_AT_containing_type. |
| 15632 | For everyone else, it is an expression to be evaluated relative |
| 15633 | to the object address. */ |
| 15634 | |
| 15635 | attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu); |
| 15636 | if (attr) |
| 15637 | { |
| 15638 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size > 0) |
| 15639 | { |
| 15640 | if (DW_BLOCK (attr)->data[0] == DW_OP_constu) |
| 15641 | { |
| 15642 | /* Old-style GCC. */ |
| 15643 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2; |
| 15644 | } |
| 15645 | else if (DW_BLOCK (attr)->data[0] == DW_OP_deref |
| 15646 | || (DW_BLOCK (attr)->size > 1 |
| 15647 | && DW_BLOCK (attr)->data[0] == DW_OP_deref_size |
| 15648 | && DW_BLOCK (attr)->data[1] == cu->header.addr_size)) |
| 15649 | { |
| 15650 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu); |
| 15651 | if ((fnp->voffset % cu->header.addr_size) != 0) |
| 15652 | dwarf2_complex_location_expr_complaint (); |
| 15653 | else |
| 15654 | fnp->voffset /= cu->header.addr_size; |
| 15655 | fnp->voffset += 2; |
| 15656 | } |
| 15657 | else |
| 15658 | dwarf2_complex_location_expr_complaint (); |
| 15659 | |
| 15660 | if (!fnp->fcontext) |
| 15661 | { |
| 15662 | /* If there is no `this' field and no DW_AT_containing_type, |
| 15663 | we cannot actually find a base class context for the |
| 15664 | vtable! */ |
| 15665 | if (TYPE_NFIELDS (this_type) == 0 |
| 15666 | || !TYPE_FIELD_ARTIFICIAL (this_type, 0)) |
| 15667 | { |
| 15668 | complaint (&symfile_complaints, |
| 15669 | _("cannot determine context for virtual member " |
| 15670 | "function \"%s\" (offset %d)"), |
| 15671 | fieldname, to_underlying (die->sect_off)); |
| 15672 | } |
| 15673 | else |
| 15674 | { |
| 15675 | fnp->fcontext |
| 15676 | = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type, 0)); |
| 15677 | } |
| 15678 | } |
| 15679 | } |
| 15680 | else if (attr_form_is_section_offset (attr)) |
| 15681 | { |
| 15682 | dwarf2_complex_location_expr_complaint (); |
| 15683 | } |
| 15684 | else |
| 15685 | { |
| 15686 | dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location", |
| 15687 | fieldname); |
| 15688 | } |
| 15689 | } |
| 15690 | else |
| 15691 | { |
| 15692 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); |
| 15693 | if (attr && DW_UNSND (attr)) |
| 15694 | { |
| 15695 | /* GCC does this, as of 2008-08-25; PR debug/37237. */ |
| 15696 | complaint (&symfile_complaints, |
| 15697 | _("Member function \"%s\" (offset %d) is virtual " |
| 15698 | "but the vtable offset is not specified"), |
| 15699 | fieldname, to_underlying (die->sect_off)); |
| 15700 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
| 15701 | TYPE_CPLUS_DYNAMIC (type) = 1; |
| 15702 | } |
| 15703 | } |
| 15704 | } |
| 15705 | |
| 15706 | /* Create the vector of member function fields, and attach it to the type. */ |
| 15707 | |
| 15708 | static void |
| 15709 | dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type, |
| 15710 | struct dwarf2_cu *cu) |
| 15711 | { |
| 15712 | struct fnfieldlist *flp; |
| 15713 | int i; |
| 15714 | |
| 15715 | if (cu->language == language_ada) |
| 15716 | error (_("unexpected member functions in Ada type")); |
| 15717 | |
| 15718 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
| 15719 | TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *) |
| 15720 | TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields); |
| 15721 | |
| 15722 | for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++) |
| 15723 | { |
| 15724 | struct nextfnfield *nfp = flp->head; |
| 15725 | struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i); |
| 15726 | int k; |
| 15727 | |
| 15728 | TYPE_FN_FIELDLIST_NAME (type, i) = flp->name; |
| 15729 | TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length; |
| 15730 | fn_flp->fn_fields = (struct fn_field *) |
| 15731 | TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length); |
| 15732 | for (k = flp->length; (k--, nfp); nfp = nfp->next) |
| 15733 | fn_flp->fn_fields[k] = nfp->fnfield; |
| 15734 | } |
| 15735 | |
| 15736 | TYPE_NFN_FIELDS (type) = fip->nfnfields; |
| 15737 | } |
| 15738 | |
| 15739 | /* Returns non-zero if NAME is the name of a vtable member in CU's |
| 15740 | language, zero otherwise. */ |
| 15741 | static int |
| 15742 | is_vtable_name (const char *name, struct dwarf2_cu *cu) |
| 15743 | { |
| 15744 | static const char vptr[] = "_vptr"; |
| 15745 | |
| 15746 | /* Look for the C++ form of the vtable. */ |
| 15747 | if (startswith (name, vptr) && is_cplus_marker (name[sizeof (vptr) - 1])) |
| 15748 | return 1; |
| 15749 | |
| 15750 | return 0; |
| 15751 | } |
| 15752 | |
| 15753 | /* GCC outputs unnamed structures that are really pointers to member |
| 15754 | functions, with the ABI-specified layout. If TYPE describes |
| 15755 | such a structure, smash it into a member function type. |
| 15756 | |
| 15757 | GCC shouldn't do this; it should just output pointer to member DIEs. |
| 15758 | This is GCC PR debug/28767. */ |
| 15759 | |
| 15760 | static void |
| 15761 | quirk_gcc_member_function_pointer (struct type *type, struct objfile *objfile) |
| 15762 | { |
| 15763 | struct type *pfn_type, *self_type, *new_type; |
| 15764 | |
| 15765 | /* Check for a structure with no name and two children. */ |
| 15766 | if (TYPE_CODE (type) != TYPE_CODE_STRUCT || TYPE_NFIELDS (type) != 2) |
| 15767 | return; |
| 15768 | |
| 15769 | /* Check for __pfn and __delta members. */ |
| 15770 | if (TYPE_FIELD_NAME (type, 0) == NULL |
| 15771 | || strcmp (TYPE_FIELD_NAME (type, 0), "__pfn") != 0 |
| 15772 | || TYPE_FIELD_NAME (type, 1) == NULL |
| 15773 | || strcmp (TYPE_FIELD_NAME (type, 1), "__delta") != 0) |
| 15774 | return; |
| 15775 | |
| 15776 | /* Find the type of the method. */ |
| 15777 | pfn_type = TYPE_FIELD_TYPE (type, 0); |
| 15778 | if (pfn_type == NULL |
| 15779 | || TYPE_CODE (pfn_type) != TYPE_CODE_PTR |
| 15780 | || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC) |
| 15781 | return; |
| 15782 | |
| 15783 | /* Look for the "this" argument. */ |
| 15784 | pfn_type = TYPE_TARGET_TYPE (pfn_type); |
| 15785 | if (TYPE_NFIELDS (pfn_type) == 0 |
| 15786 | /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */ |
| 15787 | || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR) |
| 15788 | return; |
| 15789 | |
| 15790 | self_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0)); |
| 15791 | new_type = alloc_type (objfile); |
| 15792 | smash_to_method_type (new_type, self_type, TYPE_TARGET_TYPE (pfn_type), |
| 15793 | TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type), |
| 15794 | TYPE_VARARGS (pfn_type)); |
| 15795 | smash_to_methodptr_type (type, new_type); |
| 15796 | } |
| 15797 | |
| 15798 | |
| 15799 | /* Called when we find the DIE that starts a structure or union scope |
| 15800 | (definition) to create a type for the structure or union. Fill in |
| 15801 | the type's name and general properties; the members will not be |
| 15802 | processed until process_structure_scope. A symbol table entry for |
| 15803 | the type will also not be done until process_structure_scope (assuming |
| 15804 | the type has a name). |
| 15805 | |
| 15806 | NOTE: we need to call these functions regardless of whether or not the |
| 15807 | DIE has a DW_AT_name attribute, since it might be an anonymous |
| 15808 | structure or union. This gets the type entered into our set of |
| 15809 | user defined types. */ |
| 15810 | |
| 15811 | static struct type * |
| 15812 | read_structure_type (struct die_info *die, struct dwarf2_cu *cu) |
| 15813 | { |
| 15814 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 15815 | struct type *type; |
| 15816 | struct attribute *attr; |
| 15817 | const char *name; |
| 15818 | |
| 15819 | /* If the definition of this type lives in .debug_types, read that type. |
| 15820 | Don't follow DW_AT_specification though, that will take us back up |
| 15821 | the chain and we want to go down. */ |
| 15822 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
| 15823 | if (attr) |
| 15824 | { |
| 15825 | type = get_DW_AT_signature_type (die, attr, cu); |
| 15826 | |
| 15827 | /* The type's CU may not be the same as CU. |
| 15828 | Ensure TYPE is recorded with CU in die_type_hash. */ |
| 15829 | return set_die_type (die, type, cu); |
| 15830 | } |
| 15831 | |
| 15832 | type = alloc_type (objfile); |
| 15833 | INIT_CPLUS_SPECIFIC (type); |
| 15834 | |
| 15835 | name = dwarf2_name (die, cu); |
| 15836 | if (name != NULL) |
| 15837 | { |
| 15838 | if (cu->language == language_cplus |
| 15839 | || cu->language == language_d |
| 15840 | || cu->language == language_rust) |
| 15841 | { |
| 15842 | const char *full_name = dwarf2_full_name (name, die, cu); |
| 15843 | |
| 15844 | /* dwarf2_full_name might have already finished building the DIE's |
| 15845 | type. If so, there is no need to continue. */ |
| 15846 | if (get_die_type (die, cu) != NULL) |
| 15847 | return get_die_type (die, cu); |
| 15848 | |
| 15849 | TYPE_TAG_NAME (type) = full_name; |
| 15850 | if (die->tag == DW_TAG_structure_type |
| 15851 | || die->tag == DW_TAG_class_type) |
| 15852 | TYPE_NAME (type) = TYPE_TAG_NAME (type); |
| 15853 | } |
| 15854 | else |
| 15855 | { |
| 15856 | /* The name is already allocated along with this objfile, so |
| 15857 | we don't need to duplicate it for the type. */ |
| 15858 | TYPE_TAG_NAME (type) = name; |
| 15859 | if (die->tag == DW_TAG_class_type) |
| 15860 | TYPE_NAME (type) = TYPE_TAG_NAME (type); |
| 15861 | } |
| 15862 | } |
| 15863 | |
| 15864 | if (die->tag == DW_TAG_structure_type) |
| 15865 | { |
| 15866 | TYPE_CODE (type) = TYPE_CODE_STRUCT; |
| 15867 | } |
| 15868 | else if (die->tag == DW_TAG_union_type) |
| 15869 | { |
| 15870 | TYPE_CODE (type) = TYPE_CODE_UNION; |
| 15871 | } |
| 15872 | else |
| 15873 | { |
| 15874 | TYPE_CODE (type) = TYPE_CODE_STRUCT; |
| 15875 | } |
| 15876 | |
| 15877 | if (cu->language == language_cplus && die->tag == DW_TAG_class_type) |
| 15878 | TYPE_DECLARED_CLASS (type) = 1; |
| 15879 | |
| 15880 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
| 15881 | if (attr) |
| 15882 | { |
| 15883 | if (attr_form_is_constant (attr)) |
| 15884 | TYPE_LENGTH (type) = DW_UNSND (attr); |
| 15885 | else |
| 15886 | { |
| 15887 | /* For the moment, dynamic type sizes are not supported |
| 15888 | by GDB's struct type. The actual size is determined |
| 15889 | on-demand when resolving the type of a given object, |
| 15890 | so set the type's length to zero for now. Otherwise, |
| 15891 | we record an expression as the length, and that expression |
| 15892 | could lead to a very large value, which could eventually |
| 15893 | lead to us trying to allocate that much memory when creating |
| 15894 | a value of that type. */ |
| 15895 | TYPE_LENGTH (type) = 0; |
| 15896 | } |
| 15897 | } |
| 15898 | else |
| 15899 | { |
| 15900 | TYPE_LENGTH (type) = 0; |
| 15901 | } |
| 15902 | |
| 15903 | if (producer_is_icc_lt_14 (cu) && (TYPE_LENGTH (type) == 0)) |
| 15904 | { |
| 15905 | /* ICC<14 does not output the required DW_AT_declaration on |
| 15906 | incomplete types, but gives them a size of zero. */ |
| 15907 | TYPE_STUB (type) = 1; |
| 15908 | } |
| 15909 | else |
| 15910 | TYPE_STUB_SUPPORTED (type) = 1; |
| 15911 | |
| 15912 | if (die_is_declaration (die, cu)) |
| 15913 | TYPE_STUB (type) = 1; |
| 15914 | else if (attr == NULL && die->child == NULL |
| 15915 | && producer_is_realview (cu->producer)) |
| 15916 | /* RealView does not output the required DW_AT_declaration |
| 15917 | on incomplete types. */ |
| 15918 | TYPE_STUB (type) = 1; |
| 15919 | |
| 15920 | /* We need to add the type field to the die immediately so we don't |
| 15921 | infinitely recurse when dealing with pointers to the structure |
| 15922 | type within the structure itself. */ |
| 15923 | set_die_type (die, type, cu); |
| 15924 | |
| 15925 | /* set_die_type should be already done. */ |
| 15926 | set_descriptive_type (type, die, cu); |
| 15927 | |
| 15928 | return type; |
| 15929 | } |
| 15930 | |
| 15931 | /* Finish creating a structure or union type, including filling in |
| 15932 | its members and creating a symbol for it. */ |
| 15933 | |
| 15934 | static void |
| 15935 | process_structure_scope (struct die_info *die, struct dwarf2_cu *cu) |
| 15936 | { |
| 15937 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 15938 | struct die_info *child_die; |
| 15939 | struct type *type; |
| 15940 | |
| 15941 | type = get_die_type (die, cu); |
| 15942 | if (type == NULL) |
| 15943 | type = read_structure_type (die, cu); |
| 15944 | |
| 15945 | if (die->child != NULL && ! die_is_declaration (die, cu)) |
| 15946 | { |
| 15947 | struct field_info fi; |
| 15948 | std::vector<struct symbol *> template_args; |
| 15949 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
| 15950 | |
| 15951 | memset (&fi, 0, sizeof (struct field_info)); |
| 15952 | |
| 15953 | child_die = die->child; |
| 15954 | |
| 15955 | while (child_die && child_die->tag) |
| 15956 | { |
| 15957 | if (child_die->tag == DW_TAG_member |
| 15958 | || child_die->tag == DW_TAG_variable) |
| 15959 | { |
| 15960 | /* NOTE: carlton/2002-11-05: A C++ static data member |
| 15961 | should be a DW_TAG_member that is a declaration, but |
| 15962 | all versions of G++ as of this writing (so through at |
| 15963 | least 3.2.1) incorrectly generate DW_TAG_variable |
| 15964 | tags for them instead. */ |
| 15965 | dwarf2_add_field (&fi, child_die, cu); |
| 15966 | } |
| 15967 | else if (child_die->tag == DW_TAG_subprogram) |
| 15968 | { |
| 15969 | /* Rust doesn't have member functions in the C++ sense. |
| 15970 | However, it does emit ordinary functions as children |
| 15971 | of a struct DIE. */ |
| 15972 | if (cu->language == language_rust) |
| 15973 | read_func_scope (child_die, cu); |
| 15974 | else |
| 15975 | { |
| 15976 | /* C++ member function. */ |
| 15977 | dwarf2_add_member_fn (&fi, child_die, type, cu); |
| 15978 | } |
| 15979 | } |
| 15980 | else if (child_die->tag == DW_TAG_inheritance) |
| 15981 | { |
| 15982 | /* C++ base class field. */ |
| 15983 | dwarf2_add_field (&fi, child_die, cu); |
| 15984 | } |
| 15985 | else if (type_can_define_types (child_die)) |
| 15986 | dwarf2_add_type_defn (&fi, child_die, cu); |
| 15987 | else if (child_die->tag == DW_TAG_template_type_param |
| 15988 | || child_die->tag == DW_TAG_template_value_param) |
| 15989 | { |
| 15990 | struct symbol *arg = new_symbol (child_die, NULL, cu); |
| 15991 | |
| 15992 | if (arg != NULL) |
| 15993 | template_args.push_back (arg); |
| 15994 | } |
| 15995 | |
| 15996 | child_die = sibling_die (child_die); |
| 15997 | } |
| 15998 | |
| 15999 | /* Attach template arguments to type. */ |
| 16000 | if (!template_args.empty ()) |
| 16001 | { |
| 16002 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
| 16003 | TYPE_N_TEMPLATE_ARGUMENTS (type) = template_args.size (); |
| 16004 | TYPE_TEMPLATE_ARGUMENTS (type) |
| 16005 | = XOBNEWVEC (&objfile->objfile_obstack, |
| 16006 | struct symbol *, |
| 16007 | TYPE_N_TEMPLATE_ARGUMENTS (type)); |
| 16008 | memcpy (TYPE_TEMPLATE_ARGUMENTS (type), |
| 16009 | template_args.data (), |
| 16010 | (TYPE_N_TEMPLATE_ARGUMENTS (type) |
| 16011 | * sizeof (struct symbol *))); |
| 16012 | } |
| 16013 | |
| 16014 | /* Attach fields and member functions to the type. */ |
| 16015 | if (fi.nfields) |
| 16016 | dwarf2_attach_fields_to_type (&fi, type, cu); |
| 16017 | if (fi.nfnfields) |
| 16018 | { |
| 16019 | dwarf2_attach_fn_fields_to_type (&fi, type, cu); |
| 16020 | |
| 16021 | /* Get the type which refers to the base class (possibly this |
| 16022 | class itself) which contains the vtable pointer for the current |
| 16023 | class from the DW_AT_containing_type attribute. This use of |
| 16024 | DW_AT_containing_type is a GNU extension. */ |
| 16025 | |
| 16026 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
| 16027 | { |
| 16028 | struct type *t = die_containing_type (die, cu); |
| 16029 | |
| 16030 | set_type_vptr_basetype (type, t); |
| 16031 | if (type == t) |
| 16032 | { |
| 16033 | int i; |
| 16034 | |
| 16035 | /* Our own class provides vtbl ptr. */ |
| 16036 | for (i = TYPE_NFIELDS (t) - 1; |
| 16037 | i >= TYPE_N_BASECLASSES (t); |
| 16038 | --i) |
| 16039 | { |
| 16040 | const char *fieldname = TYPE_FIELD_NAME (t, i); |
| 16041 | |
| 16042 | if (is_vtable_name (fieldname, cu)) |
| 16043 | { |
| 16044 | set_type_vptr_fieldno (type, i); |
| 16045 | break; |
| 16046 | } |
| 16047 | } |
| 16048 | |
| 16049 | /* Complain if virtual function table field not found. */ |
| 16050 | if (i < TYPE_N_BASECLASSES (t)) |
| 16051 | complaint (&symfile_complaints, |
| 16052 | _("virtual function table pointer " |
| 16053 | "not found when defining class '%s'"), |
| 16054 | TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) : |
| 16055 | ""); |
| 16056 | } |
| 16057 | else |
| 16058 | { |
| 16059 | set_type_vptr_fieldno (type, TYPE_VPTR_FIELDNO (t)); |
| 16060 | } |
| 16061 | } |
| 16062 | else if (cu->producer |
| 16063 | && startswith (cu->producer, "IBM(R) XL C/C++ Advanced Edition")) |
| 16064 | { |
| 16065 | /* The IBM XLC compiler does not provide direct indication |
| 16066 | of the containing type, but the vtable pointer is |
| 16067 | always named __vfp. */ |
| 16068 | |
| 16069 | int i; |
| 16070 | |
| 16071 | for (i = TYPE_NFIELDS (type) - 1; |
| 16072 | i >= TYPE_N_BASECLASSES (type); |
| 16073 | --i) |
| 16074 | { |
| 16075 | if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0) |
| 16076 | { |
| 16077 | set_type_vptr_fieldno (type, i); |
| 16078 | set_type_vptr_basetype (type, type); |
| 16079 | break; |
| 16080 | } |
| 16081 | } |
| 16082 | } |
| 16083 | } |
| 16084 | |
| 16085 | /* Copy fi.typedef_field_list linked list elements content into the |
| 16086 | allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */ |
| 16087 | if (fi.typedef_field_list) |
| 16088 | { |
| 16089 | int i = fi.typedef_field_list_count; |
| 16090 | |
| 16091 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
| 16092 | TYPE_TYPEDEF_FIELD_ARRAY (type) |
| 16093 | = ((struct decl_field *) |
| 16094 | TYPE_ALLOC (type, sizeof (TYPE_TYPEDEF_FIELD (type, 0)) * i)); |
| 16095 | TYPE_TYPEDEF_FIELD_COUNT (type) = i; |
| 16096 | |
| 16097 | /* Reverse the list order to keep the debug info elements order. */ |
| 16098 | while (--i >= 0) |
| 16099 | { |
| 16100 | struct decl_field *dest, *src; |
| 16101 | |
| 16102 | dest = &TYPE_TYPEDEF_FIELD (type, i); |
| 16103 | src = &fi.typedef_field_list->field; |
| 16104 | fi.typedef_field_list = fi.typedef_field_list->next; |
| 16105 | *dest = *src; |
| 16106 | } |
| 16107 | } |
| 16108 | |
| 16109 | /* Copy fi.nested_types_list linked list elements content into the |
| 16110 | allocated array TYPE_NESTED_TYPES_ARRAY (type). */ |
| 16111 | if (fi.nested_types_list != NULL && cu->language != language_ada) |
| 16112 | { |
| 16113 | int i = fi.nested_types_list_count; |
| 16114 | |
| 16115 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
| 16116 | TYPE_NESTED_TYPES_ARRAY (type) |
| 16117 | = ((struct decl_field *) |
| 16118 | TYPE_ALLOC (type, sizeof (struct decl_field) * i)); |
| 16119 | TYPE_NESTED_TYPES_COUNT (type) = i; |
| 16120 | |
| 16121 | /* Reverse the list order to keep the debug info elements order. */ |
| 16122 | while (--i >= 0) |
| 16123 | { |
| 16124 | struct decl_field *dest, *src; |
| 16125 | |
| 16126 | dest = &TYPE_NESTED_TYPES_FIELD (type, i); |
| 16127 | src = &fi.nested_types_list->field; |
| 16128 | fi.nested_types_list = fi.nested_types_list->next; |
| 16129 | *dest = *src; |
| 16130 | } |
| 16131 | } |
| 16132 | |
| 16133 | do_cleanups (back_to); |
| 16134 | } |
| 16135 | |
| 16136 | quirk_gcc_member_function_pointer (type, objfile); |
| 16137 | |
| 16138 | /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its |
| 16139 | snapshots) has been known to create a die giving a declaration |
| 16140 | for a class that has, as a child, a die giving a definition for a |
| 16141 | nested class. So we have to process our children even if the |
| 16142 | current die is a declaration. Normally, of course, a declaration |
| 16143 | won't have any children at all. */ |
| 16144 | |
| 16145 | child_die = die->child; |
| 16146 | |
| 16147 | while (child_die != NULL && child_die->tag) |
| 16148 | { |
| 16149 | if (child_die->tag == DW_TAG_member |
| 16150 | || child_die->tag == DW_TAG_variable |
| 16151 | || child_die->tag == DW_TAG_inheritance |
| 16152 | || child_die->tag == DW_TAG_template_value_param |
| 16153 | || child_die->tag == DW_TAG_template_type_param) |
| 16154 | { |
| 16155 | /* Do nothing. */ |
| 16156 | } |
| 16157 | else |
| 16158 | process_die (child_die, cu); |
| 16159 | |
| 16160 | child_die = sibling_die (child_die); |
| 16161 | } |
| 16162 | |
| 16163 | /* Do not consider external references. According to the DWARF standard, |
| 16164 | these DIEs are identified by the fact that they have no byte_size |
| 16165 | attribute, and a declaration attribute. */ |
| 16166 | if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL |
| 16167 | || !die_is_declaration (die, cu)) |
| 16168 | new_symbol (die, type, cu); |
| 16169 | } |
| 16170 | |
| 16171 | /* Assuming DIE is an enumeration type, and TYPE is its associated type, |
| 16172 | update TYPE using some information only available in DIE's children. */ |
| 16173 | |
| 16174 | static void |
| 16175 | update_enumeration_type_from_children (struct die_info *die, |
| 16176 | struct type *type, |
| 16177 | struct dwarf2_cu *cu) |
| 16178 | { |
| 16179 | struct die_info *child_die; |
| 16180 | int unsigned_enum = 1; |
| 16181 | int flag_enum = 1; |
| 16182 | ULONGEST mask = 0; |
| 16183 | |
| 16184 | auto_obstack obstack; |
| 16185 | |
| 16186 | for (child_die = die->child; |
| 16187 | child_die != NULL && child_die->tag; |
| 16188 | child_die = sibling_die (child_die)) |
| 16189 | { |
| 16190 | struct attribute *attr; |
| 16191 | LONGEST value; |
| 16192 | const gdb_byte *bytes; |
| 16193 | struct dwarf2_locexpr_baton *baton; |
| 16194 | const char *name; |
| 16195 | |
| 16196 | if (child_die->tag != DW_TAG_enumerator) |
| 16197 | continue; |
| 16198 | |
| 16199 | attr = dwarf2_attr (child_die, DW_AT_const_value, cu); |
| 16200 | if (attr == NULL) |
| 16201 | continue; |
| 16202 | |
| 16203 | name = dwarf2_name (child_die, cu); |
| 16204 | if (name == NULL) |
| 16205 | name = "<anonymous enumerator>"; |
| 16206 | |
| 16207 | dwarf2_const_value_attr (attr, type, name, &obstack, cu, |
| 16208 | &value, &bytes, &baton); |
| 16209 | if (value < 0) |
| 16210 | { |
| 16211 | unsigned_enum = 0; |
| 16212 | flag_enum = 0; |
| 16213 | } |
| 16214 | else if ((mask & value) != 0) |
| 16215 | flag_enum = 0; |
| 16216 | else |
| 16217 | mask |= value; |
| 16218 | |
| 16219 | /* If we already know that the enum type is neither unsigned, nor |
| 16220 | a flag type, no need to look at the rest of the enumerates. */ |
| 16221 | if (!unsigned_enum && !flag_enum) |
| 16222 | break; |
| 16223 | } |
| 16224 | |
| 16225 | if (unsigned_enum) |
| 16226 | TYPE_UNSIGNED (type) = 1; |
| 16227 | if (flag_enum) |
| 16228 | TYPE_FLAG_ENUM (type) = 1; |
| 16229 | } |
| 16230 | |
| 16231 | /* Given a DW_AT_enumeration_type die, set its type. We do not |
| 16232 | complete the type's fields yet, or create any symbols. */ |
| 16233 | |
| 16234 | static struct type * |
| 16235 | read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu) |
| 16236 | { |
| 16237 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 16238 | struct type *type; |
| 16239 | struct attribute *attr; |
| 16240 | const char *name; |
| 16241 | |
| 16242 | /* If the definition of this type lives in .debug_types, read that type. |
| 16243 | Don't follow DW_AT_specification though, that will take us back up |
| 16244 | the chain and we want to go down. */ |
| 16245 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
| 16246 | if (attr) |
| 16247 | { |
| 16248 | type = get_DW_AT_signature_type (die, attr, cu); |
| 16249 | |
| 16250 | /* The type's CU may not be the same as CU. |
| 16251 | Ensure TYPE is recorded with CU in die_type_hash. */ |
| 16252 | return set_die_type (die, type, cu); |
| 16253 | } |
| 16254 | |
| 16255 | type = alloc_type (objfile); |
| 16256 | |
| 16257 | TYPE_CODE (type) = TYPE_CODE_ENUM; |
| 16258 | name = dwarf2_full_name (NULL, die, cu); |
| 16259 | if (name != NULL) |
| 16260 | TYPE_TAG_NAME (type) = name; |
| 16261 | |
| 16262 | attr = dwarf2_attr (die, DW_AT_type, cu); |
| 16263 | if (attr != NULL) |
| 16264 | { |
| 16265 | struct type *underlying_type = die_type (die, cu); |
| 16266 | |
| 16267 | TYPE_TARGET_TYPE (type) = underlying_type; |
| 16268 | } |
| 16269 | |
| 16270 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
| 16271 | if (attr) |
| 16272 | { |
| 16273 | TYPE_LENGTH (type) = DW_UNSND (attr); |
| 16274 | } |
| 16275 | else |
| 16276 | { |
| 16277 | TYPE_LENGTH (type) = 0; |
| 16278 | } |
| 16279 | |
| 16280 | /* The enumeration DIE can be incomplete. In Ada, any type can be |
| 16281 | declared as private in the package spec, and then defined only |
| 16282 | inside the package body. Such types are known as Taft Amendment |
| 16283 | Types. When another package uses such a type, an incomplete DIE |
| 16284 | may be generated by the compiler. */ |
| 16285 | if (die_is_declaration (die, cu)) |
| 16286 | TYPE_STUB (type) = 1; |
| 16287 | |
| 16288 | /* Finish the creation of this type by using the enum's children. |
| 16289 | We must call this even when the underlying type has been provided |
| 16290 | so that we can determine if we're looking at a "flag" enum. */ |
| 16291 | update_enumeration_type_from_children (die, type, cu); |
| 16292 | |
| 16293 | /* If this type has an underlying type that is not a stub, then we |
| 16294 | may use its attributes. We always use the "unsigned" attribute |
| 16295 | in this situation, because ordinarily we guess whether the type |
| 16296 | is unsigned -- but the guess can be wrong and the underlying type |
| 16297 | can tell us the reality. However, we defer to a local size |
| 16298 | attribute if one exists, because this lets the compiler override |
| 16299 | the underlying type if needed. */ |
| 16300 | if (TYPE_TARGET_TYPE (type) != NULL && !TYPE_STUB (TYPE_TARGET_TYPE (type))) |
| 16301 | { |
| 16302 | TYPE_UNSIGNED (type) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type)); |
| 16303 | if (TYPE_LENGTH (type) == 0) |
| 16304 | TYPE_LENGTH (type) = TYPE_LENGTH (TYPE_TARGET_TYPE (type)); |
| 16305 | } |
| 16306 | |
| 16307 | TYPE_DECLARED_CLASS (type) = dwarf2_flag_true_p (die, DW_AT_enum_class, cu); |
| 16308 | |
| 16309 | return set_die_type (die, type, cu); |
| 16310 | } |
| 16311 | |
| 16312 | /* Given a pointer to a die which begins an enumeration, process all |
| 16313 | the dies that define the members of the enumeration, and create the |
| 16314 | symbol for the enumeration type. |
| 16315 | |
| 16316 | NOTE: We reverse the order of the element list. */ |
| 16317 | |
| 16318 | static void |
| 16319 | process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu) |
| 16320 | { |
| 16321 | struct type *this_type; |
| 16322 | |
| 16323 | this_type = get_die_type (die, cu); |
| 16324 | if (this_type == NULL) |
| 16325 | this_type = read_enumeration_type (die, cu); |
| 16326 | |
| 16327 | if (die->child != NULL) |
| 16328 | { |
| 16329 | struct die_info *child_die; |
| 16330 | struct symbol *sym; |
| 16331 | struct field *fields = NULL; |
| 16332 | int num_fields = 0; |
| 16333 | const char *name; |
| 16334 | |
| 16335 | child_die = die->child; |
| 16336 | while (child_die && child_die->tag) |
| 16337 | { |
| 16338 | if (child_die->tag != DW_TAG_enumerator) |
| 16339 | { |
| 16340 | process_die (child_die, cu); |
| 16341 | } |
| 16342 | else |
| 16343 | { |
| 16344 | name = dwarf2_name (child_die, cu); |
| 16345 | if (name) |
| 16346 | { |
| 16347 | sym = new_symbol (child_die, this_type, cu); |
| 16348 | |
| 16349 | if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0) |
| 16350 | { |
| 16351 | fields = (struct field *) |
| 16352 | xrealloc (fields, |
| 16353 | (num_fields + DW_FIELD_ALLOC_CHUNK) |
| 16354 | * sizeof (struct field)); |
| 16355 | } |
| 16356 | |
| 16357 | FIELD_NAME (fields[num_fields]) = SYMBOL_LINKAGE_NAME (sym); |
| 16358 | FIELD_TYPE (fields[num_fields]) = NULL; |
| 16359 | SET_FIELD_ENUMVAL (fields[num_fields], SYMBOL_VALUE (sym)); |
| 16360 | FIELD_BITSIZE (fields[num_fields]) = 0; |
| 16361 | |
| 16362 | num_fields++; |
| 16363 | } |
| 16364 | } |
| 16365 | |
| 16366 | child_die = sibling_die (child_die); |
| 16367 | } |
| 16368 | |
| 16369 | if (num_fields) |
| 16370 | { |
| 16371 | TYPE_NFIELDS (this_type) = num_fields; |
| 16372 | TYPE_FIELDS (this_type) = (struct field *) |
| 16373 | TYPE_ALLOC (this_type, sizeof (struct field) * num_fields); |
| 16374 | memcpy (TYPE_FIELDS (this_type), fields, |
| 16375 | sizeof (struct field) * num_fields); |
| 16376 | xfree (fields); |
| 16377 | } |
| 16378 | } |
| 16379 | |
| 16380 | /* If we are reading an enum from a .debug_types unit, and the enum |
| 16381 | is a declaration, and the enum is not the signatured type in the |
| 16382 | unit, then we do not want to add a symbol for it. Adding a |
| 16383 | symbol would in some cases obscure the true definition of the |
| 16384 | enum, giving users an incomplete type when the definition is |
| 16385 | actually available. Note that we do not want to do this for all |
| 16386 | enums which are just declarations, because C++0x allows forward |
| 16387 | enum declarations. */ |
| 16388 | if (cu->per_cu->is_debug_types |
| 16389 | && die_is_declaration (die, cu)) |
| 16390 | { |
| 16391 | struct signatured_type *sig_type; |
| 16392 | |
| 16393 | sig_type = (struct signatured_type *) cu->per_cu; |
| 16394 | gdb_assert (to_underlying (sig_type->type_offset_in_section) != 0); |
| 16395 | if (sig_type->type_offset_in_section != die->sect_off) |
| 16396 | return; |
| 16397 | } |
| 16398 | |
| 16399 | new_symbol (die, this_type, cu); |
| 16400 | } |
| 16401 | |
| 16402 | /* Extract all information from a DW_TAG_array_type DIE and put it in |
| 16403 | the DIE's type field. For now, this only handles one dimensional |
| 16404 | arrays. */ |
| 16405 | |
| 16406 | static struct type * |
| 16407 | read_array_type (struct die_info *die, struct dwarf2_cu *cu) |
| 16408 | { |
| 16409 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 16410 | struct die_info *child_die; |
| 16411 | struct type *type; |
| 16412 | struct type *element_type, *range_type, *index_type; |
| 16413 | struct attribute *attr; |
| 16414 | const char *name; |
| 16415 | struct dynamic_prop *byte_stride_prop = NULL; |
| 16416 | unsigned int bit_stride = 0; |
| 16417 | |
| 16418 | element_type = die_type (die, cu); |
| 16419 | |
| 16420 | /* The die_type call above may have already set the type for this DIE. */ |
| 16421 | type = get_die_type (die, cu); |
| 16422 | if (type) |
| 16423 | return type; |
| 16424 | |
| 16425 | attr = dwarf2_attr (die, DW_AT_byte_stride, cu); |
| 16426 | if (attr != NULL) |
| 16427 | { |
| 16428 | int stride_ok; |
| 16429 | |
| 16430 | byte_stride_prop |
| 16431 | = (struct dynamic_prop *) alloca (sizeof (struct dynamic_prop)); |
| 16432 | stride_ok = attr_to_dynamic_prop (attr, die, cu, byte_stride_prop); |
| 16433 | if (!stride_ok) |
| 16434 | { |
| 16435 | complaint (&symfile_complaints, |
| 16436 | _("unable to read array DW_AT_byte_stride " |
| 16437 | " - DIE at 0x%x [in module %s]"), |
| 16438 | to_underlying (die->sect_off), |
| 16439 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
| 16440 | /* Ignore this attribute. We will likely not be able to print |
| 16441 | arrays of this type correctly, but there is little we can do |
| 16442 | to help if we cannot read the attribute's value. */ |
| 16443 | byte_stride_prop = NULL; |
| 16444 | } |
| 16445 | } |
| 16446 | |
| 16447 | attr = dwarf2_attr (die, DW_AT_bit_stride, cu); |
| 16448 | if (attr != NULL) |
| 16449 | bit_stride = DW_UNSND (attr); |
| 16450 | |
| 16451 | /* Irix 6.2 native cc creates array types without children for |
| 16452 | arrays with unspecified length. */ |
| 16453 | if (die->child == NULL) |
| 16454 | { |
| 16455 | index_type = objfile_type (objfile)->builtin_int; |
| 16456 | range_type = create_static_range_type (NULL, index_type, 0, -1); |
| 16457 | type = create_array_type_with_stride (NULL, element_type, range_type, |
| 16458 | byte_stride_prop, bit_stride); |
| 16459 | return set_die_type (die, type, cu); |
| 16460 | } |
| 16461 | |
| 16462 | std::vector<struct type *> range_types; |
| 16463 | child_die = die->child; |
| 16464 | while (child_die && child_die->tag) |
| 16465 | { |
| 16466 | if (child_die->tag == DW_TAG_subrange_type) |
| 16467 | { |
| 16468 | struct type *child_type = read_type_die (child_die, cu); |
| 16469 | |
| 16470 | if (child_type != NULL) |
| 16471 | { |
| 16472 | /* The range type was succesfully read. Save it for the |
| 16473 | array type creation. */ |
| 16474 | range_types.push_back (child_type); |
| 16475 | } |
| 16476 | } |
| 16477 | child_die = sibling_die (child_die); |
| 16478 | } |
| 16479 | |
| 16480 | /* Dwarf2 dimensions are output from left to right, create the |
| 16481 | necessary array types in backwards order. */ |
| 16482 | |
| 16483 | type = element_type; |
| 16484 | |
| 16485 | if (read_array_order (die, cu) == DW_ORD_col_major) |
| 16486 | { |
| 16487 | int i = 0; |
| 16488 | |
| 16489 | while (i < range_types.size ()) |
| 16490 | type = create_array_type_with_stride (NULL, type, range_types[i++], |
| 16491 | byte_stride_prop, bit_stride); |
| 16492 | } |
| 16493 | else |
| 16494 | { |
| 16495 | size_t ndim = range_types.size (); |
| 16496 | while (ndim-- > 0) |
| 16497 | type = create_array_type_with_stride (NULL, type, range_types[ndim], |
| 16498 | byte_stride_prop, bit_stride); |
| 16499 | } |
| 16500 | |
| 16501 | /* Understand Dwarf2 support for vector types (like they occur on |
| 16502 | the PowerPC w/ AltiVec). Gcc just adds another attribute to the |
| 16503 | array type. This is not part of the Dwarf2/3 standard yet, but a |
| 16504 | custom vendor extension. The main difference between a regular |
| 16505 | array and the vector variant is that vectors are passed by value |
| 16506 | to functions. */ |
| 16507 | attr = dwarf2_attr (die, DW_AT_GNU_vector, cu); |
| 16508 | if (attr) |
| 16509 | make_vector_type (type); |
| 16510 | |
| 16511 | /* The DIE may have DW_AT_byte_size set. For example an OpenCL |
| 16512 | implementation may choose to implement triple vectors using this |
| 16513 | attribute. */ |
| 16514 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
| 16515 | if (attr) |
| 16516 | { |
| 16517 | if (DW_UNSND (attr) >= TYPE_LENGTH (type)) |
| 16518 | TYPE_LENGTH (type) = DW_UNSND (attr); |
| 16519 | else |
| 16520 | complaint (&symfile_complaints, |
| 16521 | _("DW_AT_byte_size for array type smaller " |
| 16522 | "than the total size of elements")); |
| 16523 | } |
| 16524 | |
| 16525 | name = dwarf2_name (die, cu); |
| 16526 | if (name) |
| 16527 | TYPE_NAME (type) = name; |
| 16528 | |
| 16529 | /* Install the type in the die. */ |
| 16530 | set_die_type (die, type, cu); |
| 16531 | |
| 16532 | /* set_die_type should be already done. */ |
| 16533 | set_descriptive_type (type, die, cu); |
| 16534 | |
| 16535 | return type; |
| 16536 | } |
| 16537 | |
| 16538 | static enum dwarf_array_dim_ordering |
| 16539 | read_array_order (struct die_info *die, struct dwarf2_cu *cu) |
| 16540 | { |
| 16541 | struct attribute *attr; |
| 16542 | |
| 16543 | attr = dwarf2_attr (die, DW_AT_ordering, cu); |
| 16544 | |
| 16545 | if (attr) |
| 16546 | return (enum dwarf_array_dim_ordering) DW_SND (attr); |
| 16547 | |
| 16548 | /* GNU F77 is a special case, as at 08/2004 array type info is the |
| 16549 | opposite order to the dwarf2 specification, but data is still |
| 16550 | laid out as per normal fortran. |
| 16551 | |
| 16552 | FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need |
| 16553 | version checking. */ |
| 16554 | |
| 16555 | if (cu->language == language_fortran |
| 16556 | && cu->producer && strstr (cu->producer, "GNU F77")) |
| 16557 | { |
| 16558 | return DW_ORD_row_major; |
| 16559 | } |
| 16560 | |
| 16561 | switch (cu->language_defn->la_array_ordering) |
| 16562 | { |
| 16563 | case array_column_major: |
| 16564 | return DW_ORD_col_major; |
| 16565 | case array_row_major: |
| 16566 | default: |
| 16567 | return DW_ORD_row_major; |
| 16568 | }; |
| 16569 | } |
| 16570 | |
| 16571 | /* Extract all information from a DW_TAG_set_type DIE and put it in |
| 16572 | the DIE's type field. */ |
| 16573 | |
| 16574 | static struct type * |
| 16575 | read_set_type (struct die_info *die, struct dwarf2_cu *cu) |
| 16576 | { |
| 16577 | struct type *domain_type, *set_type; |
| 16578 | struct attribute *attr; |
| 16579 | |
| 16580 | domain_type = die_type (die, cu); |
| 16581 | |
| 16582 | /* The die_type call above may have already set the type for this DIE. */ |
| 16583 | set_type = get_die_type (die, cu); |
| 16584 | if (set_type) |
| 16585 | return set_type; |
| 16586 | |
| 16587 | set_type = create_set_type (NULL, domain_type); |
| 16588 | |
| 16589 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
| 16590 | if (attr) |
| 16591 | TYPE_LENGTH (set_type) = DW_UNSND (attr); |
| 16592 | |
| 16593 | return set_die_type (die, set_type, cu); |
| 16594 | } |
| 16595 | |
| 16596 | /* A helper for read_common_block that creates a locexpr baton. |
| 16597 | SYM is the symbol which we are marking as computed. |
| 16598 | COMMON_DIE is the DIE for the common block. |
| 16599 | COMMON_LOC is the location expression attribute for the common |
| 16600 | block itself. |
| 16601 | MEMBER_LOC is the location expression attribute for the particular |
| 16602 | member of the common block that we are processing. |
| 16603 | CU is the CU from which the above come. */ |
| 16604 | |
| 16605 | static void |
| 16606 | mark_common_block_symbol_computed (struct symbol *sym, |
| 16607 | struct die_info *common_die, |
| 16608 | struct attribute *common_loc, |
| 16609 | struct attribute *member_loc, |
| 16610 | struct dwarf2_cu *cu) |
| 16611 | { |
| 16612 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 16613 | = cu->per_cu->dwarf2_per_objfile; |
| 16614 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 16615 | struct dwarf2_locexpr_baton *baton; |
| 16616 | gdb_byte *ptr; |
| 16617 | unsigned int cu_off; |
| 16618 | enum bfd_endian byte_order = gdbarch_byte_order (get_objfile_arch (objfile)); |
| 16619 | LONGEST offset = 0; |
| 16620 | |
| 16621 | gdb_assert (common_loc && member_loc); |
| 16622 | gdb_assert (attr_form_is_block (common_loc)); |
| 16623 | gdb_assert (attr_form_is_block (member_loc) |
| 16624 | || attr_form_is_constant (member_loc)); |
| 16625 | |
| 16626 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
| 16627 | baton->per_cu = cu->per_cu; |
| 16628 | gdb_assert (baton->per_cu); |
| 16629 | |
| 16630 | baton->size = 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */; |
| 16631 | |
| 16632 | if (attr_form_is_constant (member_loc)) |
| 16633 | { |
| 16634 | offset = dwarf2_get_attr_constant_value (member_loc, 0); |
| 16635 | baton->size += 1 /* DW_OP_addr */ + cu->header.addr_size; |
| 16636 | } |
| 16637 | else |
| 16638 | baton->size += DW_BLOCK (member_loc)->size; |
| 16639 | |
| 16640 | ptr = (gdb_byte *) obstack_alloc (&objfile->objfile_obstack, baton->size); |
| 16641 | baton->data = ptr; |
| 16642 | |
| 16643 | *ptr++ = DW_OP_call4; |
| 16644 | cu_off = common_die->sect_off - cu->per_cu->sect_off; |
| 16645 | store_unsigned_integer (ptr, 4, byte_order, cu_off); |
| 16646 | ptr += 4; |
| 16647 | |
| 16648 | if (attr_form_is_constant (member_loc)) |
| 16649 | { |
| 16650 | *ptr++ = DW_OP_addr; |
| 16651 | store_unsigned_integer (ptr, cu->header.addr_size, byte_order, offset); |
| 16652 | ptr += cu->header.addr_size; |
| 16653 | } |
| 16654 | else |
| 16655 | { |
| 16656 | /* We have to copy the data here, because DW_OP_call4 will only |
| 16657 | use a DW_AT_location attribute. */ |
| 16658 | memcpy (ptr, DW_BLOCK (member_loc)->data, DW_BLOCK (member_loc)->size); |
| 16659 | ptr += DW_BLOCK (member_loc)->size; |
| 16660 | } |
| 16661 | |
| 16662 | *ptr++ = DW_OP_plus; |
| 16663 | gdb_assert (ptr - baton->data == baton->size); |
| 16664 | |
| 16665 | SYMBOL_LOCATION_BATON (sym) = baton; |
| 16666 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
| 16667 | } |
| 16668 | |
| 16669 | /* Create appropriate locally-scoped variables for all the |
| 16670 | DW_TAG_common_block entries. Also create a struct common_block |
| 16671 | listing all such variables for `info common'. COMMON_BLOCK_DOMAIN |
| 16672 | is used to sepate the common blocks name namespace from regular |
| 16673 | variable names. */ |
| 16674 | |
| 16675 | static void |
| 16676 | read_common_block (struct die_info *die, struct dwarf2_cu *cu) |
| 16677 | { |
| 16678 | struct attribute *attr; |
| 16679 | |
| 16680 | attr = dwarf2_attr (die, DW_AT_location, cu); |
| 16681 | if (attr) |
| 16682 | { |
| 16683 | /* Support the .debug_loc offsets. */ |
| 16684 | if (attr_form_is_block (attr)) |
| 16685 | { |
| 16686 | /* Ok. */ |
| 16687 | } |
| 16688 | else if (attr_form_is_section_offset (attr)) |
| 16689 | { |
| 16690 | dwarf2_complex_location_expr_complaint (); |
| 16691 | attr = NULL; |
| 16692 | } |
| 16693 | else |
| 16694 | { |
| 16695 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", |
| 16696 | "common block member"); |
| 16697 | attr = NULL; |
| 16698 | } |
| 16699 | } |
| 16700 | |
| 16701 | if (die->child != NULL) |
| 16702 | { |
| 16703 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 16704 | struct die_info *child_die; |
| 16705 | size_t n_entries = 0, size; |
| 16706 | struct common_block *common_block; |
| 16707 | struct symbol *sym; |
| 16708 | |
| 16709 | for (child_die = die->child; |
| 16710 | child_die && child_die->tag; |
| 16711 | child_die = sibling_die (child_die)) |
| 16712 | ++n_entries; |
| 16713 | |
| 16714 | size = (sizeof (struct common_block) |
| 16715 | + (n_entries - 1) * sizeof (struct symbol *)); |
| 16716 | common_block |
| 16717 | = (struct common_block *) obstack_alloc (&objfile->objfile_obstack, |
| 16718 | size); |
| 16719 | memset (common_block->contents, 0, n_entries * sizeof (struct symbol *)); |
| 16720 | common_block->n_entries = 0; |
| 16721 | |
| 16722 | for (child_die = die->child; |
| 16723 | child_die && child_die->tag; |
| 16724 | child_die = sibling_die (child_die)) |
| 16725 | { |
| 16726 | /* Create the symbol in the DW_TAG_common_block block in the current |
| 16727 | symbol scope. */ |
| 16728 | sym = new_symbol (child_die, NULL, cu); |
| 16729 | if (sym != NULL) |
| 16730 | { |
| 16731 | struct attribute *member_loc; |
| 16732 | |
| 16733 | common_block->contents[common_block->n_entries++] = sym; |
| 16734 | |
| 16735 | member_loc = dwarf2_attr (child_die, DW_AT_data_member_location, |
| 16736 | cu); |
| 16737 | if (member_loc) |
| 16738 | { |
| 16739 | /* GDB has handled this for a long time, but it is |
| 16740 | not specified by DWARF. It seems to have been |
| 16741 | emitted by gfortran at least as recently as: |
| 16742 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */ |
| 16743 | complaint (&symfile_complaints, |
| 16744 | _("Variable in common block has " |
| 16745 | "DW_AT_data_member_location " |
| 16746 | "- DIE at 0x%x [in module %s]"), |
| 16747 | to_underlying (child_die->sect_off), |
| 16748 | objfile_name (objfile)); |
| 16749 | |
| 16750 | if (attr_form_is_section_offset (member_loc)) |
| 16751 | dwarf2_complex_location_expr_complaint (); |
| 16752 | else if (attr_form_is_constant (member_loc) |
| 16753 | || attr_form_is_block (member_loc)) |
| 16754 | { |
| 16755 | if (attr) |
| 16756 | mark_common_block_symbol_computed (sym, die, attr, |
| 16757 | member_loc, cu); |
| 16758 | } |
| 16759 | else |
| 16760 | dwarf2_complex_location_expr_complaint (); |
| 16761 | } |
| 16762 | } |
| 16763 | } |
| 16764 | |
| 16765 | sym = new_symbol (die, objfile_type (objfile)->builtin_void, cu); |
| 16766 | SYMBOL_VALUE_COMMON_BLOCK (sym) = common_block; |
| 16767 | } |
| 16768 | } |
| 16769 | |
| 16770 | /* Create a type for a C++ namespace. */ |
| 16771 | |
| 16772 | static struct type * |
| 16773 | read_namespace_type (struct die_info *die, struct dwarf2_cu *cu) |
| 16774 | { |
| 16775 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 16776 | const char *previous_prefix, *name; |
| 16777 | int is_anonymous; |
| 16778 | struct type *type; |
| 16779 | |
| 16780 | /* For extensions, reuse the type of the original namespace. */ |
| 16781 | if (dwarf2_attr (die, DW_AT_extension, cu) != NULL) |
| 16782 | { |
| 16783 | struct die_info *ext_die; |
| 16784 | struct dwarf2_cu *ext_cu = cu; |
| 16785 | |
| 16786 | ext_die = dwarf2_extension (die, &ext_cu); |
| 16787 | type = read_type_die (ext_die, ext_cu); |
| 16788 | |
| 16789 | /* EXT_CU may not be the same as CU. |
| 16790 | Ensure TYPE is recorded with CU in die_type_hash. */ |
| 16791 | return set_die_type (die, type, cu); |
| 16792 | } |
| 16793 | |
| 16794 | name = namespace_name (die, &is_anonymous, cu); |
| 16795 | |
| 16796 | /* Now build the name of the current namespace. */ |
| 16797 | |
| 16798 | previous_prefix = determine_prefix (die, cu); |
| 16799 | if (previous_prefix[0] != '\0') |
| 16800 | name = typename_concat (&objfile->objfile_obstack, |
| 16801 | previous_prefix, name, 0, cu); |
| 16802 | |
| 16803 | /* Create the type. */ |
| 16804 | type = init_type (objfile, TYPE_CODE_NAMESPACE, 0, name); |
| 16805 | TYPE_TAG_NAME (type) = TYPE_NAME (type); |
| 16806 | |
| 16807 | return set_die_type (die, type, cu); |
| 16808 | } |
| 16809 | |
| 16810 | /* Read a namespace scope. */ |
| 16811 | |
| 16812 | static void |
| 16813 | read_namespace (struct die_info *die, struct dwarf2_cu *cu) |
| 16814 | { |
| 16815 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 16816 | int is_anonymous; |
| 16817 | |
| 16818 | /* Add a symbol associated to this if we haven't seen the namespace |
| 16819 | before. Also, add a using directive if it's an anonymous |
| 16820 | namespace. */ |
| 16821 | |
| 16822 | if (dwarf2_attr (die, DW_AT_extension, cu) == NULL) |
| 16823 | { |
| 16824 | struct type *type; |
| 16825 | |
| 16826 | type = read_type_die (die, cu); |
| 16827 | new_symbol (die, type, cu); |
| 16828 | |
| 16829 | namespace_name (die, &is_anonymous, cu); |
| 16830 | if (is_anonymous) |
| 16831 | { |
| 16832 | const char *previous_prefix = determine_prefix (die, cu); |
| 16833 | |
| 16834 | std::vector<const char *> excludes; |
| 16835 | add_using_directive (using_directives (cu->language), |
| 16836 | previous_prefix, TYPE_NAME (type), NULL, |
| 16837 | NULL, excludes, 0, &objfile->objfile_obstack); |
| 16838 | } |
| 16839 | } |
| 16840 | |
| 16841 | if (die->child != NULL) |
| 16842 | { |
| 16843 | struct die_info *child_die = die->child; |
| 16844 | |
| 16845 | while (child_die && child_die->tag) |
| 16846 | { |
| 16847 | process_die (child_die, cu); |
| 16848 | child_die = sibling_die (child_die); |
| 16849 | } |
| 16850 | } |
| 16851 | } |
| 16852 | |
| 16853 | /* Read a Fortran module as type. This DIE can be only a declaration used for |
| 16854 | imported module. Still we need that type as local Fortran "use ... only" |
| 16855 | declaration imports depend on the created type in determine_prefix. */ |
| 16856 | |
| 16857 | static struct type * |
| 16858 | read_module_type (struct die_info *die, struct dwarf2_cu *cu) |
| 16859 | { |
| 16860 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 16861 | const char *module_name; |
| 16862 | struct type *type; |
| 16863 | |
| 16864 | module_name = dwarf2_name (die, cu); |
| 16865 | if (!module_name) |
| 16866 | complaint (&symfile_complaints, |
| 16867 | _("DW_TAG_module has no name, offset 0x%x"), |
| 16868 | to_underlying (die->sect_off)); |
| 16869 | type = init_type (objfile, TYPE_CODE_MODULE, 0, module_name); |
| 16870 | |
| 16871 | /* determine_prefix uses TYPE_TAG_NAME. */ |
| 16872 | TYPE_TAG_NAME (type) = TYPE_NAME (type); |
| 16873 | |
| 16874 | return set_die_type (die, type, cu); |
| 16875 | } |
| 16876 | |
| 16877 | /* Read a Fortran module. */ |
| 16878 | |
| 16879 | static void |
| 16880 | read_module (struct die_info *die, struct dwarf2_cu *cu) |
| 16881 | { |
| 16882 | struct die_info *child_die = die->child; |
| 16883 | struct type *type; |
| 16884 | |
| 16885 | type = read_type_die (die, cu); |
| 16886 | new_symbol (die, type, cu); |
| 16887 | |
| 16888 | while (child_die && child_die->tag) |
| 16889 | { |
| 16890 | process_die (child_die, cu); |
| 16891 | child_die = sibling_die (child_die); |
| 16892 | } |
| 16893 | } |
| 16894 | |
| 16895 | /* Return the name of the namespace represented by DIE. Set |
| 16896 | *IS_ANONYMOUS to tell whether or not the namespace is an anonymous |
| 16897 | namespace. */ |
| 16898 | |
| 16899 | static const char * |
| 16900 | namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu) |
| 16901 | { |
| 16902 | struct die_info *current_die; |
| 16903 | const char *name = NULL; |
| 16904 | |
| 16905 | /* Loop through the extensions until we find a name. */ |
| 16906 | |
| 16907 | for (current_die = die; |
| 16908 | current_die != NULL; |
| 16909 | current_die = dwarf2_extension (die, &cu)) |
| 16910 | { |
| 16911 | /* We don't use dwarf2_name here so that we can detect the absence |
| 16912 | of a name -> anonymous namespace. */ |
| 16913 | name = dwarf2_string_attr (die, DW_AT_name, cu); |
| 16914 | |
| 16915 | if (name != NULL) |
| 16916 | break; |
| 16917 | } |
| 16918 | |
| 16919 | /* Is it an anonymous namespace? */ |
| 16920 | |
| 16921 | *is_anonymous = (name == NULL); |
| 16922 | if (*is_anonymous) |
| 16923 | name = CP_ANONYMOUS_NAMESPACE_STR; |
| 16924 | |
| 16925 | return name; |
| 16926 | } |
| 16927 | |
| 16928 | /* Extract all information from a DW_TAG_pointer_type DIE and add to |
| 16929 | the user defined type vector. */ |
| 16930 | |
| 16931 | static struct type * |
| 16932 | read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu) |
| 16933 | { |
| 16934 | struct gdbarch *gdbarch |
| 16935 | = get_objfile_arch (cu->per_cu->dwarf2_per_objfile->objfile); |
| 16936 | struct comp_unit_head *cu_header = &cu->header; |
| 16937 | struct type *type; |
| 16938 | struct attribute *attr_byte_size; |
| 16939 | struct attribute *attr_address_class; |
| 16940 | int byte_size, addr_class; |
| 16941 | struct type *target_type; |
| 16942 | |
| 16943 | target_type = die_type (die, cu); |
| 16944 | |
| 16945 | /* The die_type call above may have already set the type for this DIE. */ |
| 16946 | type = get_die_type (die, cu); |
| 16947 | if (type) |
| 16948 | return type; |
| 16949 | |
| 16950 | type = lookup_pointer_type (target_type); |
| 16951 | |
| 16952 | attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu); |
| 16953 | if (attr_byte_size) |
| 16954 | byte_size = DW_UNSND (attr_byte_size); |
| 16955 | else |
| 16956 | byte_size = cu_header->addr_size; |
| 16957 | |
| 16958 | attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu); |
| 16959 | if (attr_address_class) |
| 16960 | addr_class = DW_UNSND (attr_address_class); |
| 16961 | else |
| 16962 | addr_class = DW_ADDR_none; |
| 16963 | |
| 16964 | /* If the pointer size or address class is different than the |
| 16965 | default, create a type variant marked as such and set the |
| 16966 | length accordingly. */ |
| 16967 | if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none) |
| 16968 | { |
| 16969 | if (gdbarch_address_class_type_flags_p (gdbarch)) |
| 16970 | { |
| 16971 | int type_flags; |
| 16972 | |
| 16973 | type_flags = gdbarch_address_class_type_flags |
| 16974 | (gdbarch, byte_size, addr_class); |
| 16975 | gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL) |
| 16976 | == 0); |
| 16977 | type = make_type_with_address_space (type, type_flags); |
| 16978 | } |
| 16979 | else if (TYPE_LENGTH (type) != byte_size) |
| 16980 | { |
| 16981 | complaint (&symfile_complaints, |
| 16982 | _("invalid pointer size %d"), byte_size); |
| 16983 | } |
| 16984 | else |
| 16985 | { |
| 16986 | /* Should we also complain about unhandled address classes? */ |
| 16987 | } |
| 16988 | } |
| 16989 | |
| 16990 | TYPE_LENGTH (type) = byte_size; |
| 16991 | return set_die_type (die, type, cu); |
| 16992 | } |
| 16993 | |
| 16994 | /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to |
| 16995 | the user defined type vector. */ |
| 16996 | |
| 16997 | static struct type * |
| 16998 | read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu) |
| 16999 | { |
| 17000 | struct type *type; |
| 17001 | struct type *to_type; |
| 17002 | struct type *domain; |
| 17003 | |
| 17004 | to_type = die_type (die, cu); |
| 17005 | domain = die_containing_type (die, cu); |
| 17006 | |
| 17007 | /* The calls above may have already set the type for this DIE. */ |
| 17008 | type = get_die_type (die, cu); |
| 17009 | if (type) |
| 17010 | return type; |
| 17011 | |
| 17012 | if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD) |
| 17013 | type = lookup_methodptr_type (to_type); |
| 17014 | else if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_FUNC) |
| 17015 | { |
| 17016 | struct type *new_type |
| 17017 | = alloc_type (cu->per_cu->dwarf2_per_objfile->objfile); |
| 17018 | |
| 17019 | smash_to_method_type (new_type, domain, TYPE_TARGET_TYPE (to_type), |
| 17020 | TYPE_FIELDS (to_type), TYPE_NFIELDS (to_type), |
| 17021 | TYPE_VARARGS (to_type)); |
| 17022 | type = lookup_methodptr_type (new_type); |
| 17023 | } |
| 17024 | else |
| 17025 | type = lookup_memberptr_type (to_type, domain); |
| 17026 | |
| 17027 | return set_die_type (die, type, cu); |
| 17028 | } |
| 17029 | |
| 17030 | /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to |
| 17031 | the user defined type vector. */ |
| 17032 | |
| 17033 | static struct type * |
| 17034 | read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu, |
| 17035 | enum type_code refcode) |
| 17036 | { |
| 17037 | struct comp_unit_head *cu_header = &cu->header; |
| 17038 | struct type *type, *target_type; |
| 17039 | struct attribute *attr; |
| 17040 | |
| 17041 | gdb_assert (refcode == TYPE_CODE_REF || refcode == TYPE_CODE_RVALUE_REF); |
| 17042 | |
| 17043 | target_type = die_type (die, cu); |
| 17044 | |
| 17045 | /* The die_type call above may have already set the type for this DIE. */ |
| 17046 | type = get_die_type (die, cu); |
| 17047 | if (type) |
| 17048 | return type; |
| 17049 | |
| 17050 | type = lookup_reference_type (target_type, refcode); |
| 17051 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
| 17052 | if (attr) |
| 17053 | { |
| 17054 | TYPE_LENGTH (type) = DW_UNSND (attr); |
| 17055 | } |
| 17056 | else |
| 17057 | { |
| 17058 | TYPE_LENGTH (type) = cu_header->addr_size; |
| 17059 | } |
| 17060 | return set_die_type (die, type, cu); |
| 17061 | } |
| 17062 | |
| 17063 | /* Add the given cv-qualifiers to the element type of the array. GCC |
| 17064 | outputs DWARF type qualifiers that apply to an array, not the |
| 17065 | element type. But GDB relies on the array element type to carry |
| 17066 | the cv-qualifiers. This mimics section 6.7.3 of the C99 |
| 17067 | specification. */ |
| 17068 | |
| 17069 | static struct type * |
| 17070 | add_array_cv_type (struct die_info *die, struct dwarf2_cu *cu, |
| 17071 | struct type *base_type, int cnst, int voltl) |
| 17072 | { |
| 17073 | struct type *el_type, *inner_array; |
| 17074 | |
| 17075 | base_type = copy_type (base_type); |
| 17076 | inner_array = base_type; |
| 17077 | |
| 17078 | while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array)) == TYPE_CODE_ARRAY) |
| 17079 | { |
| 17080 | TYPE_TARGET_TYPE (inner_array) = |
| 17081 | copy_type (TYPE_TARGET_TYPE (inner_array)); |
| 17082 | inner_array = TYPE_TARGET_TYPE (inner_array); |
| 17083 | } |
| 17084 | |
| 17085 | el_type = TYPE_TARGET_TYPE (inner_array); |
| 17086 | cnst |= TYPE_CONST (el_type); |
| 17087 | voltl |= TYPE_VOLATILE (el_type); |
| 17088 | TYPE_TARGET_TYPE (inner_array) = make_cv_type (cnst, voltl, el_type, NULL); |
| 17089 | |
| 17090 | return set_die_type (die, base_type, cu); |
| 17091 | } |
| 17092 | |
| 17093 | static struct type * |
| 17094 | read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu) |
| 17095 | { |
| 17096 | struct type *base_type, *cv_type; |
| 17097 | |
| 17098 | base_type = die_type (die, cu); |
| 17099 | |
| 17100 | /* The die_type call above may have already set the type for this DIE. */ |
| 17101 | cv_type = get_die_type (die, cu); |
| 17102 | if (cv_type) |
| 17103 | return cv_type; |
| 17104 | |
| 17105 | /* In case the const qualifier is applied to an array type, the element type |
| 17106 | is so qualified, not the array type (section 6.7.3 of C99). */ |
| 17107 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) |
| 17108 | return add_array_cv_type (die, cu, base_type, 1, 0); |
| 17109 | |
| 17110 | cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0); |
| 17111 | return set_die_type (die, cv_type, cu); |
| 17112 | } |
| 17113 | |
| 17114 | static struct type * |
| 17115 | read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu) |
| 17116 | { |
| 17117 | struct type *base_type, *cv_type; |
| 17118 | |
| 17119 | base_type = die_type (die, cu); |
| 17120 | |
| 17121 | /* The die_type call above may have already set the type for this DIE. */ |
| 17122 | cv_type = get_die_type (die, cu); |
| 17123 | if (cv_type) |
| 17124 | return cv_type; |
| 17125 | |
| 17126 | /* In case the volatile qualifier is applied to an array type, the |
| 17127 | element type is so qualified, not the array type (section 6.7.3 |
| 17128 | of C99). */ |
| 17129 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) |
| 17130 | return add_array_cv_type (die, cu, base_type, 0, 1); |
| 17131 | |
| 17132 | cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0); |
| 17133 | return set_die_type (die, cv_type, cu); |
| 17134 | } |
| 17135 | |
| 17136 | /* Handle DW_TAG_restrict_type. */ |
| 17137 | |
| 17138 | static struct type * |
| 17139 | read_tag_restrict_type (struct die_info *die, struct dwarf2_cu *cu) |
| 17140 | { |
| 17141 | struct type *base_type, *cv_type; |
| 17142 | |
| 17143 | base_type = die_type (die, cu); |
| 17144 | |
| 17145 | /* The die_type call above may have already set the type for this DIE. */ |
| 17146 | cv_type = get_die_type (die, cu); |
| 17147 | if (cv_type) |
| 17148 | return cv_type; |
| 17149 | |
| 17150 | cv_type = make_restrict_type (base_type); |
| 17151 | return set_die_type (die, cv_type, cu); |
| 17152 | } |
| 17153 | |
| 17154 | /* Handle DW_TAG_atomic_type. */ |
| 17155 | |
| 17156 | static struct type * |
| 17157 | read_tag_atomic_type (struct die_info *die, struct dwarf2_cu *cu) |
| 17158 | { |
| 17159 | struct type *base_type, *cv_type; |
| 17160 | |
| 17161 | base_type = die_type (die, cu); |
| 17162 | |
| 17163 | /* The die_type call above may have already set the type for this DIE. */ |
| 17164 | cv_type = get_die_type (die, cu); |
| 17165 | if (cv_type) |
| 17166 | return cv_type; |
| 17167 | |
| 17168 | cv_type = make_atomic_type (base_type); |
| 17169 | return set_die_type (die, cv_type, cu); |
| 17170 | } |
| 17171 | |
| 17172 | /* Extract all information from a DW_TAG_string_type DIE and add to |
| 17173 | the user defined type vector. It isn't really a user defined type, |
| 17174 | but it behaves like one, with other DIE's using an AT_user_def_type |
| 17175 | attribute to reference it. */ |
| 17176 | |
| 17177 | static struct type * |
| 17178 | read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu) |
| 17179 | { |
| 17180 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 17181 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
| 17182 | struct type *type, *range_type, *index_type, *char_type; |
| 17183 | struct attribute *attr; |
| 17184 | unsigned int length; |
| 17185 | |
| 17186 | attr = dwarf2_attr (die, DW_AT_string_length, cu); |
| 17187 | if (attr) |
| 17188 | { |
| 17189 | length = DW_UNSND (attr); |
| 17190 | } |
| 17191 | else |
| 17192 | { |
| 17193 | /* Check for the DW_AT_byte_size attribute. */ |
| 17194 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
| 17195 | if (attr) |
| 17196 | { |
| 17197 | length = DW_UNSND (attr); |
| 17198 | } |
| 17199 | else |
| 17200 | { |
| 17201 | length = 1; |
| 17202 | } |
| 17203 | } |
| 17204 | |
| 17205 | index_type = objfile_type (objfile)->builtin_int; |
| 17206 | range_type = create_static_range_type (NULL, index_type, 1, length); |
| 17207 | char_type = language_string_char_type (cu->language_defn, gdbarch); |
| 17208 | type = create_string_type (NULL, char_type, range_type); |
| 17209 | |
| 17210 | return set_die_type (die, type, cu); |
| 17211 | } |
| 17212 | |
| 17213 | /* Assuming that DIE corresponds to a function, returns nonzero |
| 17214 | if the function is prototyped. */ |
| 17215 | |
| 17216 | static int |
| 17217 | prototyped_function_p (struct die_info *die, struct dwarf2_cu *cu) |
| 17218 | { |
| 17219 | struct attribute *attr; |
| 17220 | |
| 17221 | attr = dwarf2_attr (die, DW_AT_prototyped, cu); |
| 17222 | if (attr && (DW_UNSND (attr) != 0)) |
| 17223 | return 1; |
| 17224 | |
| 17225 | /* The DWARF standard implies that the DW_AT_prototyped attribute |
| 17226 | is only meaninful for C, but the concept also extends to other |
| 17227 | languages that allow unprototyped functions (Eg: Objective C). |
| 17228 | For all other languages, assume that functions are always |
| 17229 | prototyped. */ |
| 17230 | if (cu->language != language_c |
| 17231 | && cu->language != language_objc |
| 17232 | && cu->language != language_opencl) |
| 17233 | return 1; |
| 17234 | |
| 17235 | /* RealView does not emit DW_AT_prototyped. We can not distinguish |
| 17236 | prototyped and unprototyped functions; default to prototyped, |
| 17237 | since that is more common in modern code (and RealView warns |
| 17238 | about unprototyped functions). */ |
| 17239 | if (producer_is_realview (cu->producer)) |
| 17240 | return 1; |
| 17241 | |
| 17242 | return 0; |
| 17243 | } |
| 17244 | |
| 17245 | /* Handle DIES due to C code like: |
| 17246 | |
| 17247 | struct foo |
| 17248 | { |
| 17249 | int (*funcp)(int a, long l); |
| 17250 | int b; |
| 17251 | }; |
| 17252 | |
| 17253 | ('funcp' generates a DW_TAG_subroutine_type DIE). */ |
| 17254 | |
| 17255 | static struct type * |
| 17256 | read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu) |
| 17257 | { |
| 17258 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 17259 | struct type *type; /* Type that this function returns. */ |
| 17260 | struct type *ftype; /* Function that returns above type. */ |
| 17261 | struct attribute *attr; |
| 17262 | |
| 17263 | type = die_type (die, cu); |
| 17264 | |
| 17265 | /* The die_type call above may have already set the type for this DIE. */ |
| 17266 | ftype = get_die_type (die, cu); |
| 17267 | if (ftype) |
| 17268 | return ftype; |
| 17269 | |
| 17270 | ftype = lookup_function_type (type); |
| 17271 | |
| 17272 | if (prototyped_function_p (die, cu)) |
| 17273 | TYPE_PROTOTYPED (ftype) = 1; |
| 17274 | |
| 17275 | /* Store the calling convention in the type if it's available in |
| 17276 | the subroutine die. Otherwise set the calling convention to |
| 17277 | the default value DW_CC_normal. */ |
| 17278 | attr = dwarf2_attr (die, DW_AT_calling_convention, cu); |
| 17279 | if (attr) |
| 17280 | TYPE_CALLING_CONVENTION (ftype) = DW_UNSND (attr); |
| 17281 | else if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL")) |
| 17282 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_GDB_IBM_OpenCL; |
| 17283 | else |
| 17284 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_normal; |
| 17285 | |
| 17286 | /* Record whether the function returns normally to its caller or not |
| 17287 | if the DWARF producer set that information. */ |
| 17288 | attr = dwarf2_attr (die, DW_AT_noreturn, cu); |
| 17289 | if (attr && (DW_UNSND (attr) != 0)) |
| 17290 | TYPE_NO_RETURN (ftype) = 1; |
| 17291 | |
| 17292 | /* We need to add the subroutine type to the die immediately so |
| 17293 | we don't infinitely recurse when dealing with parameters |
| 17294 | declared as the same subroutine type. */ |
| 17295 | set_die_type (die, ftype, cu); |
| 17296 | |
| 17297 | if (die->child != NULL) |
| 17298 | { |
| 17299 | struct type *void_type = objfile_type (objfile)->builtin_void; |
| 17300 | struct die_info *child_die; |
| 17301 | int nparams, iparams; |
| 17302 | |
| 17303 | /* Count the number of parameters. |
| 17304 | FIXME: GDB currently ignores vararg functions, but knows about |
| 17305 | vararg member functions. */ |
| 17306 | nparams = 0; |
| 17307 | child_die = die->child; |
| 17308 | while (child_die && child_die->tag) |
| 17309 | { |
| 17310 | if (child_die->tag == DW_TAG_formal_parameter) |
| 17311 | nparams++; |
| 17312 | else if (child_die->tag == DW_TAG_unspecified_parameters) |
| 17313 | TYPE_VARARGS (ftype) = 1; |
| 17314 | child_die = sibling_die (child_die); |
| 17315 | } |
| 17316 | |
| 17317 | /* Allocate storage for parameters and fill them in. */ |
| 17318 | TYPE_NFIELDS (ftype) = nparams; |
| 17319 | TYPE_FIELDS (ftype) = (struct field *) |
| 17320 | TYPE_ZALLOC (ftype, nparams * sizeof (struct field)); |
| 17321 | |
| 17322 | /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it |
| 17323 | even if we error out during the parameters reading below. */ |
| 17324 | for (iparams = 0; iparams < nparams; iparams++) |
| 17325 | TYPE_FIELD_TYPE (ftype, iparams) = void_type; |
| 17326 | |
| 17327 | iparams = 0; |
| 17328 | child_die = die->child; |
| 17329 | while (child_die && child_die->tag) |
| 17330 | { |
| 17331 | if (child_die->tag == DW_TAG_formal_parameter) |
| 17332 | { |
| 17333 | struct type *arg_type; |
| 17334 | |
| 17335 | /* DWARF version 2 has no clean way to discern C++ |
| 17336 | static and non-static member functions. G++ helps |
| 17337 | GDB by marking the first parameter for non-static |
| 17338 | member functions (which is the this pointer) as |
| 17339 | artificial. We pass this information to |
| 17340 | dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. |
| 17341 | |
| 17342 | DWARF version 3 added DW_AT_object_pointer, which GCC |
| 17343 | 4.5 does not yet generate. */ |
| 17344 | attr = dwarf2_attr (child_die, DW_AT_artificial, cu); |
| 17345 | if (attr) |
| 17346 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr); |
| 17347 | else |
| 17348 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0; |
| 17349 | arg_type = die_type (child_die, cu); |
| 17350 | |
| 17351 | /* RealView does not mark THIS as const, which the testsuite |
| 17352 | expects. GCC marks THIS as const in method definitions, |
| 17353 | but not in the class specifications (GCC PR 43053). */ |
| 17354 | if (cu->language == language_cplus && !TYPE_CONST (arg_type) |
| 17355 | && TYPE_FIELD_ARTIFICIAL (ftype, iparams)) |
| 17356 | { |
| 17357 | int is_this = 0; |
| 17358 | struct dwarf2_cu *arg_cu = cu; |
| 17359 | const char *name = dwarf2_name (child_die, cu); |
| 17360 | |
| 17361 | attr = dwarf2_attr (die, DW_AT_object_pointer, cu); |
| 17362 | if (attr) |
| 17363 | { |
| 17364 | /* If the compiler emits this, use it. */ |
| 17365 | if (follow_die_ref (die, attr, &arg_cu) == child_die) |
| 17366 | is_this = 1; |
| 17367 | } |
| 17368 | else if (name && strcmp (name, "this") == 0) |
| 17369 | /* Function definitions will have the argument names. */ |
| 17370 | is_this = 1; |
| 17371 | else if (name == NULL && iparams == 0) |
| 17372 | /* Declarations may not have the names, so like |
| 17373 | elsewhere in GDB, assume an artificial first |
| 17374 | argument is "this". */ |
| 17375 | is_this = 1; |
| 17376 | |
| 17377 | if (is_this) |
| 17378 | arg_type = make_cv_type (1, TYPE_VOLATILE (arg_type), |
| 17379 | arg_type, 0); |
| 17380 | } |
| 17381 | |
| 17382 | TYPE_FIELD_TYPE (ftype, iparams) = arg_type; |
| 17383 | iparams++; |
| 17384 | } |
| 17385 | child_die = sibling_die (child_die); |
| 17386 | } |
| 17387 | } |
| 17388 | |
| 17389 | return ftype; |
| 17390 | } |
| 17391 | |
| 17392 | static struct type * |
| 17393 | read_typedef (struct die_info *die, struct dwarf2_cu *cu) |
| 17394 | { |
| 17395 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 17396 | const char *name = NULL; |
| 17397 | struct type *this_type, *target_type; |
| 17398 | |
| 17399 | name = dwarf2_full_name (NULL, die, cu); |
| 17400 | this_type = init_type (objfile, TYPE_CODE_TYPEDEF, 0, name); |
| 17401 | TYPE_TARGET_STUB (this_type) = 1; |
| 17402 | set_die_type (die, this_type, cu); |
| 17403 | target_type = die_type (die, cu); |
| 17404 | if (target_type != this_type) |
| 17405 | TYPE_TARGET_TYPE (this_type) = target_type; |
| 17406 | else |
| 17407 | { |
| 17408 | /* Self-referential typedefs are, it seems, not allowed by the DWARF |
| 17409 | spec and cause infinite loops in GDB. */ |
| 17410 | complaint (&symfile_complaints, |
| 17411 | _("Self-referential DW_TAG_typedef " |
| 17412 | "- DIE at 0x%x [in module %s]"), |
| 17413 | to_underlying (die->sect_off), objfile_name (objfile)); |
| 17414 | TYPE_TARGET_TYPE (this_type) = NULL; |
| 17415 | } |
| 17416 | return this_type; |
| 17417 | } |
| 17418 | |
| 17419 | /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT |
| 17420 | (which may be different from NAME) to the architecture back-end to allow |
| 17421 | it to guess the correct format if necessary. */ |
| 17422 | |
| 17423 | static struct type * |
| 17424 | dwarf2_init_float_type (struct objfile *objfile, int bits, const char *name, |
| 17425 | const char *name_hint) |
| 17426 | { |
| 17427 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
| 17428 | const struct floatformat **format; |
| 17429 | struct type *type; |
| 17430 | |
| 17431 | format = gdbarch_floatformat_for_type (gdbarch, name_hint, bits); |
| 17432 | if (format) |
| 17433 | type = init_float_type (objfile, bits, name, format); |
| 17434 | else |
| 17435 | type = init_type (objfile, TYPE_CODE_ERROR, bits, name); |
| 17436 | |
| 17437 | return type; |
| 17438 | } |
| 17439 | |
| 17440 | /* Find a representation of a given base type and install |
| 17441 | it in the TYPE field of the die. */ |
| 17442 | |
| 17443 | static struct type * |
| 17444 | read_base_type (struct die_info *die, struct dwarf2_cu *cu) |
| 17445 | { |
| 17446 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 17447 | struct type *type; |
| 17448 | struct attribute *attr; |
| 17449 | int encoding = 0, bits = 0; |
| 17450 | const char *name; |
| 17451 | |
| 17452 | attr = dwarf2_attr (die, DW_AT_encoding, cu); |
| 17453 | if (attr) |
| 17454 | { |
| 17455 | encoding = DW_UNSND (attr); |
| 17456 | } |
| 17457 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
| 17458 | if (attr) |
| 17459 | { |
| 17460 | bits = DW_UNSND (attr) * TARGET_CHAR_BIT; |
| 17461 | } |
| 17462 | name = dwarf2_name (die, cu); |
| 17463 | if (!name) |
| 17464 | { |
| 17465 | complaint (&symfile_complaints, |
| 17466 | _("DW_AT_name missing from DW_TAG_base_type")); |
| 17467 | } |
| 17468 | |
| 17469 | switch (encoding) |
| 17470 | { |
| 17471 | case DW_ATE_address: |
| 17472 | /* Turn DW_ATE_address into a void * pointer. */ |
| 17473 | type = init_type (objfile, TYPE_CODE_VOID, TARGET_CHAR_BIT, NULL); |
| 17474 | type = init_pointer_type (objfile, bits, name, type); |
| 17475 | break; |
| 17476 | case DW_ATE_boolean: |
| 17477 | type = init_boolean_type (objfile, bits, 1, name); |
| 17478 | break; |
| 17479 | case DW_ATE_complex_float: |
| 17480 | type = dwarf2_init_float_type (objfile, bits / 2, NULL, name); |
| 17481 | type = init_complex_type (objfile, name, type); |
| 17482 | break; |
| 17483 | case DW_ATE_decimal_float: |
| 17484 | type = init_decfloat_type (objfile, bits, name); |
| 17485 | break; |
| 17486 | case DW_ATE_float: |
| 17487 | type = dwarf2_init_float_type (objfile, bits, name, name); |
| 17488 | break; |
| 17489 | case DW_ATE_signed: |
| 17490 | type = init_integer_type (objfile, bits, 0, name); |
| 17491 | break; |
| 17492 | case DW_ATE_unsigned: |
| 17493 | if (cu->language == language_fortran |
| 17494 | && name |
| 17495 | && startswith (name, "character(")) |
| 17496 | type = init_character_type (objfile, bits, 1, name); |
| 17497 | else |
| 17498 | type = init_integer_type (objfile, bits, 1, name); |
| 17499 | break; |
| 17500 | case DW_ATE_signed_char: |
| 17501 | if (cu->language == language_ada || cu->language == language_m2 |
| 17502 | || cu->language == language_pascal |
| 17503 | || cu->language == language_fortran) |
| 17504 | type = init_character_type (objfile, bits, 0, name); |
| 17505 | else |
| 17506 | type = init_integer_type (objfile, bits, 0, name); |
| 17507 | break; |
| 17508 | case DW_ATE_unsigned_char: |
| 17509 | if (cu->language == language_ada || cu->language == language_m2 |
| 17510 | || cu->language == language_pascal |
| 17511 | || cu->language == language_fortran |
| 17512 | || cu->language == language_rust) |
| 17513 | type = init_character_type (objfile, bits, 1, name); |
| 17514 | else |
| 17515 | type = init_integer_type (objfile, bits, 1, name); |
| 17516 | break; |
| 17517 | case DW_ATE_UTF: |
| 17518 | { |
| 17519 | gdbarch *arch = get_objfile_arch (objfile); |
| 17520 | |
| 17521 | if (bits == 16) |
| 17522 | type = builtin_type (arch)->builtin_char16; |
| 17523 | else if (bits == 32) |
| 17524 | type = builtin_type (arch)->builtin_char32; |
| 17525 | else |
| 17526 | { |
| 17527 | complaint (&symfile_complaints, |
| 17528 | _("unsupported DW_ATE_UTF bit size: '%d'"), |
| 17529 | bits); |
| 17530 | type = init_integer_type (objfile, bits, 1, name); |
| 17531 | } |
| 17532 | return set_die_type (die, type, cu); |
| 17533 | } |
| 17534 | break; |
| 17535 | |
| 17536 | default: |
| 17537 | complaint (&symfile_complaints, _("unsupported DW_AT_encoding: '%s'"), |
| 17538 | dwarf_type_encoding_name (encoding)); |
| 17539 | type = init_type (objfile, TYPE_CODE_ERROR, bits, name); |
| 17540 | break; |
| 17541 | } |
| 17542 | |
| 17543 | if (name && strcmp (name, "char") == 0) |
| 17544 | TYPE_NOSIGN (type) = 1; |
| 17545 | |
| 17546 | return set_die_type (die, type, cu); |
| 17547 | } |
| 17548 | |
| 17549 | /* Parse dwarf attribute if it's a block, reference or constant and put the |
| 17550 | resulting value of the attribute into struct bound_prop. |
| 17551 | Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */ |
| 17552 | |
| 17553 | static int |
| 17554 | attr_to_dynamic_prop (const struct attribute *attr, struct die_info *die, |
| 17555 | struct dwarf2_cu *cu, struct dynamic_prop *prop) |
| 17556 | { |
| 17557 | struct dwarf2_property_baton *baton; |
| 17558 | struct obstack *obstack |
| 17559 | = &cu->per_cu->dwarf2_per_objfile->objfile->objfile_obstack; |
| 17560 | |
| 17561 | if (attr == NULL || prop == NULL) |
| 17562 | return 0; |
| 17563 | |
| 17564 | if (attr_form_is_block (attr)) |
| 17565 | { |
| 17566 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
| 17567 | baton->referenced_type = NULL; |
| 17568 | baton->locexpr.per_cu = cu->per_cu; |
| 17569 | baton->locexpr.size = DW_BLOCK (attr)->size; |
| 17570 | baton->locexpr.data = DW_BLOCK (attr)->data; |
| 17571 | prop->data.baton = baton; |
| 17572 | prop->kind = PROP_LOCEXPR; |
| 17573 | gdb_assert (prop->data.baton != NULL); |
| 17574 | } |
| 17575 | else if (attr_form_is_ref (attr)) |
| 17576 | { |
| 17577 | struct dwarf2_cu *target_cu = cu; |
| 17578 | struct die_info *target_die; |
| 17579 | struct attribute *target_attr; |
| 17580 | |
| 17581 | target_die = follow_die_ref (die, attr, &target_cu); |
| 17582 | target_attr = dwarf2_attr (target_die, DW_AT_location, target_cu); |
| 17583 | if (target_attr == NULL) |
| 17584 | target_attr = dwarf2_attr (target_die, DW_AT_data_member_location, |
| 17585 | target_cu); |
| 17586 | if (target_attr == NULL) |
| 17587 | return 0; |
| 17588 | |
| 17589 | switch (target_attr->name) |
| 17590 | { |
| 17591 | case DW_AT_location: |
| 17592 | if (attr_form_is_section_offset (target_attr)) |
| 17593 | { |
| 17594 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
| 17595 | baton->referenced_type = die_type (target_die, target_cu); |
| 17596 | fill_in_loclist_baton (cu, &baton->loclist, target_attr); |
| 17597 | prop->data.baton = baton; |
| 17598 | prop->kind = PROP_LOCLIST; |
| 17599 | gdb_assert (prop->data.baton != NULL); |
| 17600 | } |
| 17601 | else if (attr_form_is_block (target_attr)) |
| 17602 | { |
| 17603 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
| 17604 | baton->referenced_type = die_type (target_die, target_cu); |
| 17605 | baton->locexpr.per_cu = cu->per_cu; |
| 17606 | baton->locexpr.size = DW_BLOCK (target_attr)->size; |
| 17607 | baton->locexpr.data = DW_BLOCK (target_attr)->data; |
| 17608 | prop->data.baton = baton; |
| 17609 | prop->kind = PROP_LOCEXPR; |
| 17610 | gdb_assert (prop->data.baton != NULL); |
| 17611 | } |
| 17612 | else |
| 17613 | { |
| 17614 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", |
| 17615 | "dynamic property"); |
| 17616 | return 0; |
| 17617 | } |
| 17618 | break; |
| 17619 | case DW_AT_data_member_location: |
| 17620 | { |
| 17621 | LONGEST offset; |
| 17622 | |
| 17623 | if (!handle_data_member_location (target_die, target_cu, |
| 17624 | &offset)) |
| 17625 | return 0; |
| 17626 | |
| 17627 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
| 17628 | baton->referenced_type = read_type_die (target_die->parent, |
| 17629 | target_cu); |
| 17630 | baton->offset_info.offset = offset; |
| 17631 | baton->offset_info.type = die_type (target_die, target_cu); |
| 17632 | prop->data.baton = baton; |
| 17633 | prop->kind = PROP_ADDR_OFFSET; |
| 17634 | break; |
| 17635 | } |
| 17636 | } |
| 17637 | } |
| 17638 | else if (attr_form_is_constant (attr)) |
| 17639 | { |
| 17640 | prop->data.const_val = dwarf2_get_attr_constant_value (attr, 0); |
| 17641 | prop->kind = PROP_CONST; |
| 17642 | } |
| 17643 | else |
| 17644 | { |
| 17645 | dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr->form), |
| 17646 | dwarf2_name (die, cu)); |
| 17647 | return 0; |
| 17648 | } |
| 17649 | |
| 17650 | return 1; |
| 17651 | } |
| 17652 | |
| 17653 | /* Read the given DW_AT_subrange DIE. */ |
| 17654 | |
| 17655 | static struct type * |
| 17656 | read_subrange_type (struct die_info *die, struct dwarf2_cu *cu) |
| 17657 | { |
| 17658 | struct type *base_type, *orig_base_type; |
| 17659 | struct type *range_type; |
| 17660 | struct attribute *attr; |
| 17661 | struct dynamic_prop low, high; |
| 17662 | int low_default_is_valid; |
| 17663 | int high_bound_is_count = 0; |
| 17664 | const char *name; |
| 17665 | LONGEST negative_mask; |
| 17666 | |
| 17667 | orig_base_type = die_type (die, cu); |
| 17668 | /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED, |
| 17669 | whereas the real type might be. So, we use ORIG_BASE_TYPE when |
| 17670 | creating the range type, but we use the result of check_typedef |
| 17671 | when examining properties of the type. */ |
| 17672 | base_type = check_typedef (orig_base_type); |
| 17673 | |
| 17674 | /* The die_type call above may have already set the type for this DIE. */ |
| 17675 | range_type = get_die_type (die, cu); |
| 17676 | if (range_type) |
| 17677 | return range_type; |
| 17678 | |
| 17679 | low.kind = PROP_CONST; |
| 17680 | high.kind = PROP_CONST; |
| 17681 | high.data.const_val = 0; |
| 17682 | |
| 17683 | /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow |
| 17684 | omitting DW_AT_lower_bound. */ |
| 17685 | switch (cu->language) |
| 17686 | { |
| 17687 | case language_c: |
| 17688 | case language_cplus: |
| 17689 | low.data.const_val = 0; |
| 17690 | low_default_is_valid = 1; |
| 17691 | break; |
| 17692 | case language_fortran: |
| 17693 | low.data.const_val = 1; |
| 17694 | low_default_is_valid = 1; |
| 17695 | break; |
| 17696 | case language_d: |
| 17697 | case language_objc: |
| 17698 | case language_rust: |
| 17699 | low.data.const_val = 0; |
| 17700 | low_default_is_valid = (cu->header.version >= 4); |
| 17701 | break; |
| 17702 | case language_ada: |
| 17703 | case language_m2: |
| 17704 | case language_pascal: |
| 17705 | low.data.const_val = 1; |
| 17706 | low_default_is_valid = (cu->header.version >= 4); |
| 17707 | break; |
| 17708 | default: |
| 17709 | low.data.const_val = 0; |
| 17710 | low_default_is_valid = 0; |
| 17711 | break; |
| 17712 | } |
| 17713 | |
| 17714 | attr = dwarf2_attr (die, DW_AT_lower_bound, cu); |
| 17715 | if (attr) |
| 17716 | attr_to_dynamic_prop (attr, die, cu, &low); |
| 17717 | else if (!low_default_is_valid) |
| 17718 | complaint (&symfile_complaints, _("Missing DW_AT_lower_bound " |
| 17719 | "- DIE at 0x%x [in module %s]"), |
| 17720 | to_underlying (die->sect_off), |
| 17721 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
| 17722 | |
| 17723 | attr = dwarf2_attr (die, DW_AT_upper_bound, cu); |
| 17724 | if (!attr_to_dynamic_prop (attr, die, cu, &high)) |
| 17725 | { |
| 17726 | attr = dwarf2_attr (die, DW_AT_count, cu); |
| 17727 | if (attr_to_dynamic_prop (attr, die, cu, &high)) |
| 17728 | { |
| 17729 | /* If bounds are constant do the final calculation here. */ |
| 17730 | if (low.kind == PROP_CONST && high.kind == PROP_CONST) |
| 17731 | high.data.const_val = low.data.const_val + high.data.const_val - 1; |
| 17732 | else |
| 17733 | high_bound_is_count = 1; |
| 17734 | } |
| 17735 | } |
| 17736 | |
| 17737 | /* Dwarf-2 specifications explicitly allows to create subrange types |
| 17738 | without specifying a base type. |
| 17739 | In that case, the base type must be set to the type of |
| 17740 | the lower bound, upper bound or count, in that order, if any of these |
| 17741 | three attributes references an object that has a type. |
| 17742 | If no base type is found, the Dwarf-2 specifications say that |
| 17743 | a signed integer type of size equal to the size of an address should |
| 17744 | be used. |
| 17745 | For the following C code: `extern char gdb_int [];' |
| 17746 | GCC produces an empty range DIE. |
| 17747 | FIXME: muller/2010-05-28: Possible references to object for low bound, |
| 17748 | high bound or count are not yet handled by this code. */ |
| 17749 | if (TYPE_CODE (base_type) == TYPE_CODE_VOID) |
| 17750 | { |
| 17751 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 17752 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
| 17753 | int addr_size = gdbarch_addr_bit (gdbarch) /8; |
| 17754 | struct type *int_type = objfile_type (objfile)->builtin_int; |
| 17755 | |
| 17756 | /* Test "int", "long int", and "long long int" objfile types, |
| 17757 | and select the first one having a size above or equal to the |
| 17758 | architecture address size. */ |
| 17759 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) |
| 17760 | base_type = int_type; |
| 17761 | else |
| 17762 | { |
| 17763 | int_type = objfile_type (objfile)->builtin_long; |
| 17764 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) |
| 17765 | base_type = int_type; |
| 17766 | else |
| 17767 | { |
| 17768 | int_type = objfile_type (objfile)->builtin_long_long; |
| 17769 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) |
| 17770 | base_type = int_type; |
| 17771 | } |
| 17772 | } |
| 17773 | } |
| 17774 | |
| 17775 | /* Normally, the DWARF producers are expected to use a signed |
| 17776 | constant form (Eg. DW_FORM_sdata) to express negative bounds. |
| 17777 | But this is unfortunately not always the case, as witnessed |
| 17778 | with GCC, for instance, where the ambiguous DW_FORM_dataN form |
| 17779 | is used instead. To work around that ambiguity, we treat |
| 17780 | the bounds as signed, and thus sign-extend their values, when |
| 17781 | the base type is signed. */ |
| 17782 | negative_mask = |
| 17783 | -((LONGEST) 1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1)); |
| 17784 | if (low.kind == PROP_CONST |
| 17785 | && !TYPE_UNSIGNED (base_type) && (low.data.const_val & negative_mask)) |
| 17786 | low.data.const_val |= negative_mask; |
| 17787 | if (high.kind == PROP_CONST |
| 17788 | && !TYPE_UNSIGNED (base_type) && (high.data.const_val & negative_mask)) |
| 17789 | high.data.const_val |= negative_mask; |
| 17790 | |
| 17791 | range_type = create_range_type (NULL, orig_base_type, &low, &high); |
| 17792 | |
| 17793 | if (high_bound_is_count) |
| 17794 | TYPE_RANGE_DATA (range_type)->flag_upper_bound_is_count = 1; |
| 17795 | |
| 17796 | /* Ada expects an empty array on no boundary attributes. */ |
| 17797 | if (attr == NULL && cu->language != language_ada) |
| 17798 | TYPE_HIGH_BOUND_KIND (range_type) = PROP_UNDEFINED; |
| 17799 | |
| 17800 | name = dwarf2_name (die, cu); |
| 17801 | if (name) |
| 17802 | TYPE_NAME (range_type) = name; |
| 17803 | |
| 17804 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
| 17805 | if (attr) |
| 17806 | TYPE_LENGTH (range_type) = DW_UNSND (attr); |
| 17807 | |
| 17808 | set_die_type (die, range_type, cu); |
| 17809 | |
| 17810 | /* set_die_type should be already done. */ |
| 17811 | set_descriptive_type (range_type, die, cu); |
| 17812 | |
| 17813 | return range_type; |
| 17814 | } |
| 17815 | |
| 17816 | static struct type * |
| 17817 | read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu) |
| 17818 | { |
| 17819 | struct type *type; |
| 17820 | |
| 17821 | type = init_type (cu->per_cu->dwarf2_per_objfile->objfile, TYPE_CODE_VOID,0, |
| 17822 | NULL); |
| 17823 | TYPE_NAME (type) = dwarf2_name (die, cu); |
| 17824 | |
| 17825 | /* In Ada, an unspecified type is typically used when the description |
| 17826 | of the type is defered to a different unit. When encountering |
| 17827 | such a type, we treat it as a stub, and try to resolve it later on, |
| 17828 | when needed. */ |
| 17829 | if (cu->language == language_ada) |
| 17830 | TYPE_STUB (type) = 1; |
| 17831 | |
| 17832 | return set_die_type (die, type, cu); |
| 17833 | } |
| 17834 | |
| 17835 | /* Read a single die and all its descendents. Set the die's sibling |
| 17836 | field to NULL; set other fields in the die correctly, and set all |
| 17837 | of the descendents' fields correctly. Set *NEW_INFO_PTR to the |
| 17838 | location of the info_ptr after reading all of those dies. PARENT |
| 17839 | is the parent of the die in question. */ |
| 17840 | |
| 17841 | static struct die_info * |
| 17842 | read_die_and_children (const struct die_reader_specs *reader, |
| 17843 | const gdb_byte *info_ptr, |
| 17844 | const gdb_byte **new_info_ptr, |
| 17845 | struct die_info *parent) |
| 17846 | { |
| 17847 | struct die_info *die; |
| 17848 | const gdb_byte *cur_ptr; |
| 17849 | int has_children; |
| 17850 | |
| 17851 | cur_ptr = read_full_die_1 (reader, &die, info_ptr, &has_children, 0); |
| 17852 | if (die == NULL) |
| 17853 | { |
| 17854 | *new_info_ptr = cur_ptr; |
| 17855 | return NULL; |
| 17856 | } |
| 17857 | store_in_ref_table (die, reader->cu); |
| 17858 | |
| 17859 | if (has_children) |
| 17860 | die->child = read_die_and_siblings_1 (reader, cur_ptr, new_info_ptr, die); |
| 17861 | else |
| 17862 | { |
| 17863 | die->child = NULL; |
| 17864 | *new_info_ptr = cur_ptr; |
| 17865 | } |
| 17866 | |
| 17867 | die->sibling = NULL; |
| 17868 | die->parent = parent; |
| 17869 | return die; |
| 17870 | } |
| 17871 | |
| 17872 | /* Read a die, all of its descendents, and all of its siblings; set |
| 17873 | all of the fields of all of the dies correctly. Arguments are as |
| 17874 | in read_die_and_children. */ |
| 17875 | |
| 17876 | static struct die_info * |
| 17877 | read_die_and_siblings_1 (const struct die_reader_specs *reader, |
| 17878 | const gdb_byte *info_ptr, |
| 17879 | const gdb_byte **new_info_ptr, |
| 17880 | struct die_info *parent) |
| 17881 | { |
| 17882 | struct die_info *first_die, *last_sibling; |
| 17883 | const gdb_byte *cur_ptr; |
| 17884 | |
| 17885 | cur_ptr = info_ptr; |
| 17886 | first_die = last_sibling = NULL; |
| 17887 | |
| 17888 | while (1) |
| 17889 | { |
| 17890 | struct die_info *die |
| 17891 | = read_die_and_children (reader, cur_ptr, &cur_ptr, parent); |
| 17892 | |
| 17893 | if (die == NULL) |
| 17894 | { |
| 17895 | *new_info_ptr = cur_ptr; |
| 17896 | return first_die; |
| 17897 | } |
| 17898 | |
| 17899 | if (!first_die) |
| 17900 | first_die = die; |
| 17901 | else |
| 17902 | last_sibling->sibling = die; |
| 17903 | |
| 17904 | last_sibling = die; |
| 17905 | } |
| 17906 | } |
| 17907 | |
| 17908 | /* Read a die, all of its descendents, and all of its siblings; set |
| 17909 | all of the fields of all of the dies correctly. Arguments are as |
| 17910 | in read_die_and_children. |
| 17911 | This the main entry point for reading a DIE and all its children. */ |
| 17912 | |
| 17913 | static struct die_info * |
| 17914 | read_die_and_siblings (const struct die_reader_specs *reader, |
| 17915 | const gdb_byte *info_ptr, |
| 17916 | const gdb_byte **new_info_ptr, |
| 17917 | struct die_info *parent) |
| 17918 | { |
| 17919 | struct die_info *die = read_die_and_siblings_1 (reader, info_ptr, |
| 17920 | new_info_ptr, parent); |
| 17921 | |
| 17922 | if (dwarf_die_debug) |
| 17923 | { |
| 17924 | fprintf_unfiltered (gdb_stdlog, |
| 17925 | "Read die from %s@0x%x of %s:\n", |
| 17926 | get_section_name (reader->die_section), |
| 17927 | (unsigned) (info_ptr - reader->die_section->buffer), |
| 17928 | bfd_get_filename (reader->abfd)); |
| 17929 | dump_die (die, dwarf_die_debug); |
| 17930 | } |
| 17931 | |
| 17932 | return die; |
| 17933 | } |
| 17934 | |
| 17935 | /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS |
| 17936 | attributes. |
| 17937 | The caller is responsible for filling in the extra attributes |
| 17938 | and updating (*DIEP)->num_attrs. |
| 17939 | Set DIEP to point to a newly allocated die with its information, |
| 17940 | except for its child, sibling, and parent fields. |
| 17941 | Set HAS_CHILDREN to tell whether the die has children or not. */ |
| 17942 | |
| 17943 | static const gdb_byte * |
| 17944 | read_full_die_1 (const struct die_reader_specs *reader, |
| 17945 | struct die_info **diep, const gdb_byte *info_ptr, |
| 17946 | int *has_children, int num_extra_attrs) |
| 17947 | { |
| 17948 | unsigned int abbrev_number, bytes_read, i; |
| 17949 | struct abbrev_info *abbrev; |
| 17950 | struct die_info *die; |
| 17951 | struct dwarf2_cu *cu = reader->cu; |
| 17952 | bfd *abfd = reader->abfd; |
| 17953 | |
| 17954 | sect_offset sect_off = (sect_offset) (info_ptr - reader->buffer); |
| 17955 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
| 17956 | info_ptr += bytes_read; |
| 17957 | if (!abbrev_number) |
| 17958 | { |
| 17959 | *diep = NULL; |
| 17960 | *has_children = 0; |
| 17961 | return info_ptr; |
| 17962 | } |
| 17963 | |
| 17964 | abbrev = reader->abbrev_table->lookup_abbrev (abbrev_number); |
| 17965 | if (!abbrev) |
| 17966 | error (_("Dwarf Error: could not find abbrev number %d [in module %s]"), |
| 17967 | abbrev_number, |
| 17968 | bfd_get_filename (abfd)); |
| 17969 | |
| 17970 | die = dwarf_alloc_die (cu, abbrev->num_attrs + num_extra_attrs); |
| 17971 | die->sect_off = sect_off; |
| 17972 | die->tag = abbrev->tag; |
| 17973 | die->abbrev = abbrev_number; |
| 17974 | |
| 17975 | /* Make the result usable. |
| 17976 | The caller needs to update num_attrs after adding the extra |
| 17977 | attributes. */ |
| 17978 | die->num_attrs = abbrev->num_attrs; |
| 17979 | |
| 17980 | for (i = 0; i < abbrev->num_attrs; ++i) |
| 17981 | info_ptr = read_attribute (reader, &die->attrs[i], &abbrev->attrs[i], |
| 17982 | info_ptr); |
| 17983 | |
| 17984 | *diep = die; |
| 17985 | *has_children = abbrev->has_children; |
| 17986 | return info_ptr; |
| 17987 | } |
| 17988 | |
| 17989 | /* Read a die and all its attributes. |
| 17990 | Set DIEP to point to a newly allocated die with its information, |
| 17991 | except for its child, sibling, and parent fields. |
| 17992 | Set HAS_CHILDREN to tell whether the die has children or not. */ |
| 17993 | |
| 17994 | static const gdb_byte * |
| 17995 | read_full_die (const struct die_reader_specs *reader, |
| 17996 | struct die_info **diep, const gdb_byte *info_ptr, |
| 17997 | int *has_children) |
| 17998 | { |
| 17999 | const gdb_byte *result; |
| 18000 | |
| 18001 | result = read_full_die_1 (reader, diep, info_ptr, has_children, 0); |
| 18002 | |
| 18003 | if (dwarf_die_debug) |
| 18004 | { |
| 18005 | fprintf_unfiltered (gdb_stdlog, |
| 18006 | "Read die from %s@0x%x of %s:\n", |
| 18007 | get_section_name (reader->die_section), |
| 18008 | (unsigned) (info_ptr - reader->die_section->buffer), |
| 18009 | bfd_get_filename (reader->abfd)); |
| 18010 | dump_die (*diep, dwarf_die_debug); |
| 18011 | } |
| 18012 | |
| 18013 | return result; |
| 18014 | } |
| 18015 | \f |
| 18016 | /* Abbreviation tables. |
| 18017 | |
| 18018 | In DWARF version 2, the description of the debugging information is |
| 18019 | stored in a separate .debug_abbrev section. Before we read any |
| 18020 | dies from a section we read in all abbreviations and install them |
| 18021 | in a hash table. */ |
| 18022 | |
| 18023 | /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */ |
| 18024 | |
| 18025 | struct abbrev_info * |
| 18026 | abbrev_table::alloc_abbrev () |
| 18027 | { |
| 18028 | struct abbrev_info *abbrev; |
| 18029 | |
| 18030 | abbrev = XOBNEW (&abbrev_obstack, struct abbrev_info); |
| 18031 | memset (abbrev, 0, sizeof (struct abbrev_info)); |
| 18032 | |
| 18033 | return abbrev; |
| 18034 | } |
| 18035 | |
| 18036 | /* Add an abbreviation to the table. */ |
| 18037 | |
| 18038 | void |
| 18039 | abbrev_table::add_abbrev (unsigned int abbrev_number, |
| 18040 | struct abbrev_info *abbrev) |
| 18041 | { |
| 18042 | unsigned int hash_number; |
| 18043 | |
| 18044 | hash_number = abbrev_number % ABBREV_HASH_SIZE; |
| 18045 | abbrev->next = m_abbrevs[hash_number]; |
| 18046 | m_abbrevs[hash_number] = abbrev; |
| 18047 | } |
| 18048 | |
| 18049 | /* Look up an abbrev in the table. |
| 18050 | Returns NULL if the abbrev is not found. */ |
| 18051 | |
| 18052 | struct abbrev_info * |
| 18053 | abbrev_table::lookup_abbrev (unsigned int abbrev_number) |
| 18054 | { |
| 18055 | unsigned int hash_number; |
| 18056 | struct abbrev_info *abbrev; |
| 18057 | |
| 18058 | hash_number = abbrev_number % ABBREV_HASH_SIZE; |
| 18059 | abbrev = m_abbrevs[hash_number]; |
| 18060 | |
| 18061 | while (abbrev) |
| 18062 | { |
| 18063 | if (abbrev->number == abbrev_number) |
| 18064 | return abbrev; |
| 18065 | abbrev = abbrev->next; |
| 18066 | } |
| 18067 | return NULL; |
| 18068 | } |
| 18069 | |
| 18070 | /* Read in an abbrev table. */ |
| 18071 | |
| 18072 | static abbrev_table_up |
| 18073 | abbrev_table_read_table (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 18074 | struct dwarf2_section_info *section, |
| 18075 | sect_offset sect_off) |
| 18076 | { |
| 18077 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 18078 | bfd *abfd = get_section_bfd_owner (section); |
| 18079 | const gdb_byte *abbrev_ptr; |
| 18080 | struct abbrev_info *cur_abbrev; |
| 18081 | unsigned int abbrev_number, bytes_read, abbrev_name; |
| 18082 | unsigned int abbrev_form; |
| 18083 | struct attr_abbrev *cur_attrs; |
| 18084 | unsigned int allocated_attrs; |
| 18085 | |
| 18086 | abbrev_table_up abbrev_table (new struct abbrev_table (sect_off)); |
| 18087 | |
| 18088 | dwarf2_read_section (objfile, section); |
| 18089 | abbrev_ptr = section->buffer + to_underlying (sect_off); |
| 18090 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
| 18091 | abbrev_ptr += bytes_read; |
| 18092 | |
| 18093 | allocated_attrs = ATTR_ALLOC_CHUNK; |
| 18094 | cur_attrs = XNEWVEC (struct attr_abbrev, allocated_attrs); |
| 18095 | |
| 18096 | /* Loop until we reach an abbrev number of 0. */ |
| 18097 | while (abbrev_number) |
| 18098 | { |
| 18099 | cur_abbrev = abbrev_table->alloc_abbrev (); |
| 18100 | |
| 18101 | /* read in abbrev header */ |
| 18102 | cur_abbrev->number = abbrev_number; |
| 18103 | cur_abbrev->tag |
| 18104 | = (enum dwarf_tag) read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
| 18105 | abbrev_ptr += bytes_read; |
| 18106 | cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr); |
| 18107 | abbrev_ptr += 1; |
| 18108 | |
| 18109 | /* now read in declarations */ |
| 18110 | for (;;) |
| 18111 | { |
| 18112 | LONGEST implicit_const; |
| 18113 | |
| 18114 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
| 18115 | abbrev_ptr += bytes_read; |
| 18116 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
| 18117 | abbrev_ptr += bytes_read; |
| 18118 | if (abbrev_form == DW_FORM_implicit_const) |
| 18119 | { |
| 18120 | implicit_const = read_signed_leb128 (abfd, abbrev_ptr, |
| 18121 | &bytes_read); |
| 18122 | abbrev_ptr += bytes_read; |
| 18123 | } |
| 18124 | else |
| 18125 | { |
| 18126 | /* Initialize it due to a false compiler warning. */ |
| 18127 | implicit_const = -1; |
| 18128 | } |
| 18129 | |
| 18130 | if (abbrev_name == 0) |
| 18131 | break; |
| 18132 | |
| 18133 | if (cur_abbrev->num_attrs == allocated_attrs) |
| 18134 | { |
| 18135 | allocated_attrs += ATTR_ALLOC_CHUNK; |
| 18136 | cur_attrs |
| 18137 | = XRESIZEVEC (struct attr_abbrev, cur_attrs, allocated_attrs); |
| 18138 | } |
| 18139 | |
| 18140 | cur_attrs[cur_abbrev->num_attrs].name |
| 18141 | = (enum dwarf_attribute) abbrev_name; |
| 18142 | cur_attrs[cur_abbrev->num_attrs].form |
| 18143 | = (enum dwarf_form) abbrev_form; |
| 18144 | cur_attrs[cur_abbrev->num_attrs].implicit_const = implicit_const; |
| 18145 | ++cur_abbrev->num_attrs; |
| 18146 | } |
| 18147 | |
| 18148 | cur_abbrev->attrs = |
| 18149 | XOBNEWVEC (&abbrev_table->abbrev_obstack, struct attr_abbrev, |
| 18150 | cur_abbrev->num_attrs); |
| 18151 | memcpy (cur_abbrev->attrs, cur_attrs, |
| 18152 | cur_abbrev->num_attrs * sizeof (struct attr_abbrev)); |
| 18153 | |
| 18154 | abbrev_table->add_abbrev (abbrev_number, cur_abbrev); |
| 18155 | |
| 18156 | /* Get next abbreviation. |
| 18157 | Under Irix6 the abbreviations for a compilation unit are not |
| 18158 | always properly terminated with an abbrev number of 0. |
| 18159 | Exit loop if we encounter an abbreviation which we have |
| 18160 | already read (which means we are about to read the abbreviations |
| 18161 | for the next compile unit) or if the end of the abbreviation |
| 18162 | table is reached. */ |
| 18163 | if ((unsigned int) (abbrev_ptr - section->buffer) >= section->size) |
| 18164 | break; |
| 18165 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
| 18166 | abbrev_ptr += bytes_read; |
| 18167 | if (abbrev_table->lookup_abbrev (abbrev_number) != NULL) |
| 18168 | break; |
| 18169 | } |
| 18170 | |
| 18171 | xfree (cur_attrs); |
| 18172 | return abbrev_table; |
| 18173 | } |
| 18174 | |
| 18175 | /* Returns nonzero if TAG represents a type that we might generate a partial |
| 18176 | symbol for. */ |
| 18177 | |
| 18178 | static int |
| 18179 | is_type_tag_for_partial (int tag) |
| 18180 | { |
| 18181 | switch (tag) |
| 18182 | { |
| 18183 | #if 0 |
| 18184 | /* Some types that would be reasonable to generate partial symbols for, |
| 18185 | that we don't at present. */ |
| 18186 | case DW_TAG_array_type: |
| 18187 | case DW_TAG_file_type: |
| 18188 | case DW_TAG_ptr_to_member_type: |
| 18189 | case DW_TAG_set_type: |
| 18190 | case DW_TAG_string_type: |
| 18191 | case DW_TAG_subroutine_type: |
| 18192 | #endif |
| 18193 | case DW_TAG_base_type: |
| 18194 | case DW_TAG_class_type: |
| 18195 | case DW_TAG_interface_type: |
| 18196 | case DW_TAG_enumeration_type: |
| 18197 | case DW_TAG_structure_type: |
| 18198 | case DW_TAG_subrange_type: |
| 18199 | case DW_TAG_typedef: |
| 18200 | case DW_TAG_union_type: |
| 18201 | return 1; |
| 18202 | default: |
| 18203 | return 0; |
| 18204 | } |
| 18205 | } |
| 18206 | |
| 18207 | /* Load all DIEs that are interesting for partial symbols into memory. */ |
| 18208 | |
| 18209 | static struct partial_die_info * |
| 18210 | load_partial_dies (const struct die_reader_specs *reader, |
| 18211 | const gdb_byte *info_ptr, int building_psymtab) |
| 18212 | { |
| 18213 | struct dwarf2_cu *cu = reader->cu; |
| 18214 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 18215 | struct partial_die_info *part_die; |
| 18216 | struct partial_die_info *parent_die, *last_die, *first_die = NULL; |
| 18217 | unsigned int bytes_read; |
| 18218 | unsigned int load_all = 0; |
| 18219 | int nesting_level = 1; |
| 18220 | |
| 18221 | parent_die = NULL; |
| 18222 | last_die = NULL; |
| 18223 | |
| 18224 | gdb_assert (cu->per_cu != NULL); |
| 18225 | if (cu->per_cu->load_all_dies) |
| 18226 | load_all = 1; |
| 18227 | |
| 18228 | cu->partial_dies |
| 18229 | = htab_create_alloc_ex (cu->header.length / 12, |
| 18230 | partial_die_hash, |
| 18231 | partial_die_eq, |
| 18232 | NULL, |
| 18233 | &cu->comp_unit_obstack, |
| 18234 | hashtab_obstack_allocate, |
| 18235 | dummy_obstack_deallocate); |
| 18236 | |
| 18237 | part_die = XOBNEW (&cu->comp_unit_obstack, struct partial_die_info); |
| 18238 | |
| 18239 | while (1) |
| 18240 | { |
| 18241 | abbrev_info *abbrev = peek_die_abbrev (*reader, info_ptr, &bytes_read); |
| 18242 | |
| 18243 | /* A NULL abbrev means the end of a series of children. */ |
| 18244 | if (abbrev == NULL) |
| 18245 | { |
| 18246 | if (--nesting_level == 0) |
| 18247 | { |
| 18248 | /* PART_DIE was probably the last thing allocated on the |
| 18249 | comp_unit_obstack, so we could call obstack_free |
| 18250 | here. We don't do that because the waste is small, |
| 18251 | and will be cleaned up when we're done with this |
| 18252 | compilation unit. This way, we're also more robust |
| 18253 | against other users of the comp_unit_obstack. */ |
| 18254 | return first_die; |
| 18255 | } |
| 18256 | info_ptr += bytes_read; |
| 18257 | last_die = parent_die; |
| 18258 | parent_die = parent_die->die_parent; |
| 18259 | continue; |
| 18260 | } |
| 18261 | |
| 18262 | /* Check for template arguments. We never save these; if |
| 18263 | they're seen, we just mark the parent, and go on our way. */ |
| 18264 | if (parent_die != NULL |
| 18265 | && cu->language == language_cplus |
| 18266 | && (abbrev->tag == DW_TAG_template_type_param |
| 18267 | || abbrev->tag == DW_TAG_template_value_param)) |
| 18268 | { |
| 18269 | parent_die->has_template_arguments = 1; |
| 18270 | |
| 18271 | if (!load_all) |
| 18272 | { |
| 18273 | /* We don't need a partial DIE for the template argument. */ |
| 18274 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
| 18275 | continue; |
| 18276 | } |
| 18277 | } |
| 18278 | |
| 18279 | /* We only recurse into c++ subprograms looking for template arguments. |
| 18280 | Skip their other children. */ |
| 18281 | if (!load_all |
| 18282 | && cu->language == language_cplus |
| 18283 | && parent_die != NULL |
| 18284 | && parent_die->tag == DW_TAG_subprogram) |
| 18285 | { |
| 18286 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
| 18287 | continue; |
| 18288 | } |
| 18289 | |
| 18290 | /* Check whether this DIE is interesting enough to save. Normally |
| 18291 | we would not be interested in members here, but there may be |
| 18292 | later variables referencing them via DW_AT_specification (for |
| 18293 | static members). */ |
| 18294 | if (!load_all |
| 18295 | && !is_type_tag_for_partial (abbrev->tag) |
| 18296 | && abbrev->tag != DW_TAG_constant |
| 18297 | && abbrev->tag != DW_TAG_enumerator |
| 18298 | && abbrev->tag != DW_TAG_subprogram |
| 18299 | && abbrev->tag != DW_TAG_inlined_subroutine |
| 18300 | && abbrev->tag != DW_TAG_lexical_block |
| 18301 | && abbrev->tag != DW_TAG_variable |
| 18302 | && abbrev->tag != DW_TAG_namespace |
| 18303 | && abbrev->tag != DW_TAG_module |
| 18304 | && abbrev->tag != DW_TAG_member |
| 18305 | && abbrev->tag != DW_TAG_imported_unit |
| 18306 | && abbrev->tag != DW_TAG_imported_declaration) |
| 18307 | { |
| 18308 | /* Otherwise we skip to the next sibling, if any. */ |
| 18309 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
| 18310 | continue; |
| 18311 | } |
| 18312 | |
| 18313 | info_ptr = read_partial_die (reader, part_die, abbrev, bytes_read, |
| 18314 | info_ptr); |
| 18315 | |
| 18316 | /* This two-pass algorithm for processing partial symbols has a |
| 18317 | high cost in cache pressure. Thus, handle some simple cases |
| 18318 | here which cover the majority of C partial symbols. DIEs |
| 18319 | which neither have specification tags in them, nor could have |
| 18320 | specification tags elsewhere pointing at them, can simply be |
| 18321 | processed and discarded. |
| 18322 | |
| 18323 | This segment is also optional; scan_partial_symbols and |
| 18324 | add_partial_symbol will handle these DIEs if we chain |
| 18325 | them in normally. When compilers which do not emit large |
| 18326 | quantities of duplicate debug information are more common, |
| 18327 | this code can probably be removed. */ |
| 18328 | |
| 18329 | /* Any complete simple types at the top level (pretty much all |
| 18330 | of them, for a language without namespaces), can be processed |
| 18331 | directly. */ |
| 18332 | if (parent_die == NULL |
| 18333 | && part_die->has_specification == 0 |
| 18334 | && part_die->is_declaration == 0 |
| 18335 | && ((part_die->tag == DW_TAG_typedef && !part_die->has_children) |
| 18336 | || part_die->tag == DW_TAG_base_type |
| 18337 | || part_die->tag == DW_TAG_subrange_type)) |
| 18338 | { |
| 18339 | if (building_psymtab && part_die->name != NULL) |
| 18340 | add_psymbol_to_list (part_die->name, strlen (part_die->name), 0, |
| 18341 | VAR_DOMAIN, LOC_TYPEDEF, |
| 18342 | &objfile->static_psymbols, |
| 18343 | 0, cu->language, objfile); |
| 18344 | info_ptr = locate_pdi_sibling (reader, part_die, info_ptr); |
| 18345 | continue; |
| 18346 | } |
| 18347 | |
| 18348 | /* The exception for DW_TAG_typedef with has_children above is |
| 18349 | a workaround of GCC PR debug/47510. In the case of this complaint |
| 18350 | type_name_no_tag_or_error will error on such types later. |
| 18351 | |
| 18352 | GDB skipped children of DW_TAG_typedef by the shortcut above and then |
| 18353 | it could not find the child DIEs referenced later, this is checked |
| 18354 | above. In correct DWARF DW_TAG_typedef should have no children. */ |
| 18355 | |
| 18356 | if (part_die->tag == DW_TAG_typedef && part_die->has_children) |
| 18357 | complaint (&symfile_complaints, |
| 18358 | _("DW_TAG_typedef has childen - GCC PR debug/47510 bug " |
| 18359 | "- DIE at 0x%x [in module %s]"), |
| 18360 | to_underlying (part_die->sect_off), objfile_name (objfile)); |
| 18361 | |
| 18362 | /* If we're at the second level, and we're an enumerator, and |
| 18363 | our parent has no specification (meaning possibly lives in a |
| 18364 | namespace elsewhere), then we can add the partial symbol now |
| 18365 | instead of queueing it. */ |
| 18366 | if (part_die->tag == DW_TAG_enumerator |
| 18367 | && parent_die != NULL |
| 18368 | && parent_die->die_parent == NULL |
| 18369 | && parent_die->tag == DW_TAG_enumeration_type |
| 18370 | && parent_die->has_specification == 0) |
| 18371 | { |
| 18372 | if (part_die->name == NULL) |
| 18373 | complaint (&symfile_complaints, |
| 18374 | _("malformed enumerator DIE ignored")); |
| 18375 | else if (building_psymtab) |
| 18376 | add_psymbol_to_list (part_die->name, strlen (part_die->name), 0, |
| 18377 | VAR_DOMAIN, LOC_CONST, |
| 18378 | cu->language == language_cplus |
| 18379 | ? &objfile->global_psymbols |
| 18380 | : &objfile->static_psymbols, |
| 18381 | 0, cu->language, objfile); |
| 18382 | |
| 18383 | info_ptr = locate_pdi_sibling (reader, part_die, info_ptr); |
| 18384 | continue; |
| 18385 | } |
| 18386 | |
| 18387 | /* We'll save this DIE so link it in. */ |
| 18388 | part_die->die_parent = parent_die; |
| 18389 | part_die->die_sibling = NULL; |
| 18390 | part_die->die_child = NULL; |
| 18391 | |
| 18392 | if (last_die && last_die == parent_die) |
| 18393 | last_die->die_child = part_die; |
| 18394 | else if (last_die) |
| 18395 | last_die->die_sibling = part_die; |
| 18396 | |
| 18397 | last_die = part_die; |
| 18398 | |
| 18399 | if (first_die == NULL) |
| 18400 | first_die = part_die; |
| 18401 | |
| 18402 | /* Maybe add the DIE to the hash table. Not all DIEs that we |
| 18403 | find interesting need to be in the hash table, because we |
| 18404 | also have the parent/sibling/child chains; only those that we |
| 18405 | might refer to by offset later during partial symbol reading. |
| 18406 | |
| 18407 | For now this means things that might have be the target of a |
| 18408 | DW_AT_specification, DW_AT_abstract_origin, or |
| 18409 | DW_AT_extension. DW_AT_extension will refer only to |
| 18410 | namespaces; DW_AT_abstract_origin refers to functions (and |
| 18411 | many things under the function DIE, but we do not recurse |
| 18412 | into function DIEs during partial symbol reading) and |
| 18413 | possibly variables as well; DW_AT_specification refers to |
| 18414 | declarations. Declarations ought to have the DW_AT_declaration |
| 18415 | flag. It happens that GCC forgets to put it in sometimes, but |
| 18416 | only for functions, not for types. |
| 18417 | |
| 18418 | Adding more things than necessary to the hash table is harmless |
| 18419 | except for the performance cost. Adding too few will result in |
| 18420 | wasted time in find_partial_die, when we reread the compilation |
| 18421 | unit with load_all_dies set. */ |
| 18422 | |
| 18423 | if (load_all |
| 18424 | || abbrev->tag == DW_TAG_constant |
| 18425 | || abbrev->tag == DW_TAG_subprogram |
| 18426 | || abbrev->tag == DW_TAG_variable |
| 18427 | || abbrev->tag == DW_TAG_namespace |
| 18428 | || part_die->is_declaration) |
| 18429 | { |
| 18430 | void **slot; |
| 18431 | |
| 18432 | slot = htab_find_slot_with_hash (cu->partial_dies, part_die, |
| 18433 | to_underlying (part_die->sect_off), |
| 18434 | INSERT); |
| 18435 | *slot = part_die; |
| 18436 | } |
| 18437 | |
| 18438 | part_die = XOBNEW (&cu->comp_unit_obstack, struct partial_die_info); |
| 18439 | |
| 18440 | /* For some DIEs we want to follow their children (if any). For C |
| 18441 | we have no reason to follow the children of structures; for other |
| 18442 | languages we have to, so that we can get at method physnames |
| 18443 | to infer fully qualified class names, for DW_AT_specification, |
| 18444 | and for C++ template arguments. For C++, we also look one level |
| 18445 | inside functions to find template arguments (if the name of the |
| 18446 | function does not already contain the template arguments). |
| 18447 | |
| 18448 | For Ada, we need to scan the children of subprograms and lexical |
| 18449 | blocks as well because Ada allows the definition of nested |
| 18450 | entities that could be interesting for the debugger, such as |
| 18451 | nested subprograms for instance. */ |
| 18452 | if (last_die->has_children |
| 18453 | && (load_all |
| 18454 | || last_die->tag == DW_TAG_namespace |
| 18455 | || last_die->tag == DW_TAG_module |
| 18456 | || last_die->tag == DW_TAG_enumeration_type |
| 18457 | || (cu->language == language_cplus |
| 18458 | && last_die->tag == DW_TAG_subprogram |
| 18459 | && (last_die->name == NULL |
| 18460 | || strchr (last_die->name, '<') == NULL)) |
| 18461 | || (cu->language != language_c |
| 18462 | && (last_die->tag == DW_TAG_class_type |
| 18463 | || last_die->tag == DW_TAG_interface_type |
| 18464 | || last_die->tag == DW_TAG_structure_type |
| 18465 | || last_die->tag == DW_TAG_union_type)) |
| 18466 | || (cu->language == language_ada |
| 18467 | && (last_die->tag == DW_TAG_subprogram |
| 18468 | || last_die->tag == DW_TAG_lexical_block)))) |
| 18469 | { |
| 18470 | nesting_level++; |
| 18471 | parent_die = last_die; |
| 18472 | continue; |
| 18473 | } |
| 18474 | |
| 18475 | /* Otherwise we skip to the next sibling, if any. */ |
| 18476 | info_ptr = locate_pdi_sibling (reader, last_die, info_ptr); |
| 18477 | |
| 18478 | /* Back to the top, do it again. */ |
| 18479 | } |
| 18480 | } |
| 18481 | |
| 18482 | /* Read a minimal amount of information into the minimal die structure. */ |
| 18483 | |
| 18484 | static const gdb_byte * |
| 18485 | read_partial_die (const struct die_reader_specs *reader, |
| 18486 | struct partial_die_info *part_die, |
| 18487 | struct abbrev_info *abbrev, unsigned int abbrev_len, |
| 18488 | const gdb_byte *info_ptr) |
| 18489 | { |
| 18490 | struct dwarf2_cu *cu = reader->cu; |
| 18491 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 18492 | = cu->per_cu->dwarf2_per_objfile; |
| 18493 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 18494 | const gdb_byte *buffer = reader->buffer; |
| 18495 | unsigned int i; |
| 18496 | struct attribute attr; |
| 18497 | int has_low_pc_attr = 0; |
| 18498 | int has_high_pc_attr = 0; |
| 18499 | int high_pc_relative = 0; |
| 18500 | |
| 18501 | memset (part_die, 0, sizeof (struct partial_die_info)); |
| 18502 | |
| 18503 | part_die->sect_off = (sect_offset) (info_ptr - buffer); |
| 18504 | |
| 18505 | info_ptr += abbrev_len; |
| 18506 | |
| 18507 | if (abbrev == NULL) |
| 18508 | return info_ptr; |
| 18509 | |
| 18510 | part_die->tag = abbrev->tag; |
| 18511 | part_die->has_children = abbrev->has_children; |
| 18512 | |
| 18513 | for (i = 0; i < abbrev->num_attrs; ++i) |
| 18514 | { |
| 18515 | info_ptr = read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr); |
| 18516 | |
| 18517 | /* Store the data if it is of an attribute we want to keep in a |
| 18518 | partial symbol table. */ |
| 18519 | switch (attr.name) |
| 18520 | { |
| 18521 | case DW_AT_name: |
| 18522 | switch (part_die->tag) |
| 18523 | { |
| 18524 | case DW_TAG_compile_unit: |
| 18525 | case DW_TAG_partial_unit: |
| 18526 | case DW_TAG_type_unit: |
| 18527 | /* Compilation units have a DW_AT_name that is a filename, not |
| 18528 | a source language identifier. */ |
| 18529 | case DW_TAG_enumeration_type: |
| 18530 | case DW_TAG_enumerator: |
| 18531 | /* These tags always have simple identifiers already; no need |
| 18532 | to canonicalize them. */ |
| 18533 | part_die->name = DW_STRING (&attr); |
| 18534 | break; |
| 18535 | default: |
| 18536 | part_die->name |
| 18537 | = dwarf2_canonicalize_name (DW_STRING (&attr), cu, |
| 18538 | &objfile->per_bfd->storage_obstack); |
| 18539 | break; |
| 18540 | } |
| 18541 | break; |
| 18542 | case DW_AT_linkage_name: |
| 18543 | case DW_AT_MIPS_linkage_name: |
| 18544 | /* Note that both forms of linkage name might appear. We |
| 18545 | assume they will be the same, and we only store the last |
| 18546 | one we see. */ |
| 18547 | if (cu->language == language_ada) |
| 18548 | part_die->name = DW_STRING (&attr); |
| 18549 | part_die->linkage_name = DW_STRING (&attr); |
| 18550 | break; |
| 18551 | case DW_AT_low_pc: |
| 18552 | has_low_pc_attr = 1; |
| 18553 | part_die->lowpc = attr_value_as_address (&attr); |
| 18554 | break; |
| 18555 | case DW_AT_high_pc: |
| 18556 | has_high_pc_attr = 1; |
| 18557 | part_die->highpc = attr_value_as_address (&attr); |
| 18558 | if (cu->header.version >= 4 && attr_form_is_constant (&attr)) |
| 18559 | high_pc_relative = 1; |
| 18560 | break; |
| 18561 | case DW_AT_location: |
| 18562 | /* Support the .debug_loc offsets. */ |
| 18563 | if (attr_form_is_block (&attr)) |
| 18564 | { |
| 18565 | part_die->d.locdesc = DW_BLOCK (&attr); |
| 18566 | } |
| 18567 | else if (attr_form_is_section_offset (&attr)) |
| 18568 | { |
| 18569 | dwarf2_complex_location_expr_complaint (); |
| 18570 | } |
| 18571 | else |
| 18572 | { |
| 18573 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", |
| 18574 | "partial symbol information"); |
| 18575 | } |
| 18576 | break; |
| 18577 | case DW_AT_external: |
| 18578 | part_die->is_external = DW_UNSND (&attr); |
| 18579 | break; |
| 18580 | case DW_AT_declaration: |
| 18581 | part_die->is_declaration = DW_UNSND (&attr); |
| 18582 | break; |
| 18583 | case DW_AT_type: |
| 18584 | part_die->has_type = 1; |
| 18585 | break; |
| 18586 | case DW_AT_abstract_origin: |
| 18587 | case DW_AT_specification: |
| 18588 | case DW_AT_extension: |
| 18589 | part_die->has_specification = 1; |
| 18590 | part_die->spec_offset = dwarf2_get_ref_die_offset (&attr); |
| 18591 | part_die->spec_is_dwz = (attr.form == DW_FORM_GNU_ref_alt |
| 18592 | || cu->per_cu->is_dwz); |
| 18593 | break; |
| 18594 | case DW_AT_sibling: |
| 18595 | /* Ignore absolute siblings, they might point outside of |
| 18596 | the current compile unit. */ |
| 18597 | if (attr.form == DW_FORM_ref_addr) |
| 18598 | complaint (&symfile_complaints, |
| 18599 | _("ignoring absolute DW_AT_sibling")); |
| 18600 | else |
| 18601 | { |
| 18602 | sect_offset off = dwarf2_get_ref_die_offset (&attr); |
| 18603 | const gdb_byte *sibling_ptr = buffer + to_underlying (off); |
| 18604 | |
| 18605 | if (sibling_ptr < info_ptr) |
| 18606 | complaint (&symfile_complaints, |
| 18607 | _("DW_AT_sibling points backwards")); |
| 18608 | else if (sibling_ptr > reader->buffer_end) |
| 18609 | dwarf2_section_buffer_overflow_complaint (reader->die_section); |
| 18610 | else |
| 18611 | part_die->sibling = sibling_ptr; |
| 18612 | } |
| 18613 | break; |
| 18614 | case DW_AT_byte_size: |
| 18615 | part_die->has_byte_size = 1; |
| 18616 | break; |
| 18617 | case DW_AT_const_value: |
| 18618 | part_die->has_const_value = 1; |
| 18619 | break; |
| 18620 | case DW_AT_calling_convention: |
| 18621 | /* DWARF doesn't provide a way to identify a program's source-level |
| 18622 | entry point. DW_AT_calling_convention attributes are only meant |
| 18623 | to describe functions' calling conventions. |
| 18624 | |
| 18625 | However, because it's a necessary piece of information in |
| 18626 | Fortran, and before DWARF 4 DW_CC_program was the only |
| 18627 | piece of debugging information whose definition refers to |
| 18628 | a 'main program' at all, several compilers marked Fortran |
| 18629 | main programs with DW_CC_program --- even when those |
| 18630 | functions use the standard calling conventions. |
| 18631 | |
| 18632 | Although DWARF now specifies a way to provide this |
| 18633 | information, we support this practice for backward |
| 18634 | compatibility. */ |
| 18635 | if (DW_UNSND (&attr) == DW_CC_program |
| 18636 | && cu->language == language_fortran) |
| 18637 | part_die->main_subprogram = 1; |
| 18638 | break; |
| 18639 | case DW_AT_inline: |
| 18640 | if (DW_UNSND (&attr) == DW_INL_inlined |
| 18641 | || DW_UNSND (&attr) == DW_INL_declared_inlined) |
| 18642 | part_die->may_be_inlined = 1; |
| 18643 | break; |
| 18644 | |
| 18645 | case DW_AT_import: |
| 18646 | if (part_die->tag == DW_TAG_imported_unit) |
| 18647 | { |
| 18648 | part_die->d.sect_off = dwarf2_get_ref_die_offset (&attr); |
| 18649 | part_die->is_dwz = (attr.form == DW_FORM_GNU_ref_alt |
| 18650 | || cu->per_cu->is_dwz); |
| 18651 | } |
| 18652 | break; |
| 18653 | |
| 18654 | case DW_AT_main_subprogram: |
| 18655 | part_die->main_subprogram = DW_UNSND (&attr); |
| 18656 | break; |
| 18657 | |
| 18658 | default: |
| 18659 | break; |
| 18660 | } |
| 18661 | } |
| 18662 | |
| 18663 | if (high_pc_relative) |
| 18664 | part_die->highpc += part_die->lowpc; |
| 18665 | |
| 18666 | if (has_low_pc_attr && has_high_pc_attr) |
| 18667 | { |
| 18668 | /* When using the GNU linker, .gnu.linkonce. sections are used to |
| 18669 | eliminate duplicate copies of functions and vtables and such. |
| 18670 | The linker will arbitrarily choose one and discard the others. |
| 18671 | The AT_*_pc values for such functions refer to local labels in |
| 18672 | these sections. If the section from that file was discarded, the |
| 18673 | labels are not in the output, so the relocs get a value of 0. |
| 18674 | If this is a discarded function, mark the pc bounds as invalid, |
| 18675 | so that GDB will ignore it. */ |
| 18676 | if (part_die->lowpc == 0 && !dwarf2_per_objfile->has_section_at_zero) |
| 18677 | { |
| 18678 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
| 18679 | |
| 18680 | complaint (&symfile_complaints, |
| 18681 | _("DW_AT_low_pc %s is zero " |
| 18682 | "for DIE at 0x%x [in module %s]"), |
| 18683 | paddress (gdbarch, part_die->lowpc), |
| 18684 | to_underlying (part_die->sect_off), objfile_name (objfile)); |
| 18685 | } |
| 18686 | /* dwarf2_get_pc_bounds has also the strict low < high requirement. */ |
| 18687 | else if (part_die->lowpc >= part_die->highpc) |
| 18688 | { |
| 18689 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
| 18690 | |
| 18691 | complaint (&symfile_complaints, |
| 18692 | _("DW_AT_low_pc %s is not < DW_AT_high_pc %s " |
| 18693 | "for DIE at 0x%x [in module %s]"), |
| 18694 | paddress (gdbarch, part_die->lowpc), |
| 18695 | paddress (gdbarch, part_die->highpc), |
| 18696 | to_underlying (part_die->sect_off), |
| 18697 | objfile_name (objfile)); |
| 18698 | } |
| 18699 | else |
| 18700 | part_die->has_pc_info = 1; |
| 18701 | } |
| 18702 | |
| 18703 | return info_ptr; |
| 18704 | } |
| 18705 | |
| 18706 | /* Find a cached partial DIE at OFFSET in CU. */ |
| 18707 | |
| 18708 | static struct partial_die_info * |
| 18709 | find_partial_die_in_comp_unit (sect_offset sect_off, struct dwarf2_cu *cu) |
| 18710 | { |
| 18711 | struct partial_die_info *lookup_die = NULL; |
| 18712 | struct partial_die_info part_die; |
| 18713 | |
| 18714 | part_die.sect_off = sect_off; |
| 18715 | lookup_die = ((struct partial_die_info *) |
| 18716 | htab_find_with_hash (cu->partial_dies, &part_die, |
| 18717 | to_underlying (sect_off))); |
| 18718 | |
| 18719 | return lookup_die; |
| 18720 | } |
| 18721 | |
| 18722 | /* Find a partial DIE at OFFSET, which may or may not be in CU, |
| 18723 | except in the case of .debug_types DIEs which do not reference |
| 18724 | outside their CU (they do however referencing other types via |
| 18725 | DW_FORM_ref_sig8). */ |
| 18726 | |
| 18727 | static struct partial_die_info * |
| 18728 | find_partial_die (sect_offset sect_off, int offset_in_dwz, struct dwarf2_cu *cu) |
| 18729 | { |
| 18730 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 18731 | = cu->per_cu->dwarf2_per_objfile; |
| 18732 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 18733 | struct dwarf2_per_cu_data *per_cu = NULL; |
| 18734 | struct partial_die_info *pd = NULL; |
| 18735 | |
| 18736 | if (offset_in_dwz == cu->per_cu->is_dwz |
| 18737 | && offset_in_cu_p (&cu->header, sect_off)) |
| 18738 | { |
| 18739 | pd = find_partial_die_in_comp_unit (sect_off, cu); |
| 18740 | if (pd != NULL) |
| 18741 | return pd; |
| 18742 | /* We missed recording what we needed. |
| 18743 | Load all dies and try again. */ |
| 18744 | per_cu = cu->per_cu; |
| 18745 | } |
| 18746 | else |
| 18747 | { |
| 18748 | /* TUs don't reference other CUs/TUs (except via type signatures). */ |
| 18749 | if (cu->per_cu->is_debug_types) |
| 18750 | { |
| 18751 | error (_("Dwarf Error: Type Unit at offset 0x%x contains" |
| 18752 | " external reference to offset 0x%x [in module %s].\n"), |
| 18753 | to_underlying (cu->header.sect_off), to_underlying (sect_off), |
| 18754 | bfd_get_filename (objfile->obfd)); |
| 18755 | } |
| 18756 | per_cu = dwarf2_find_containing_comp_unit (sect_off, offset_in_dwz, |
| 18757 | dwarf2_per_objfile); |
| 18758 | |
| 18759 | if (per_cu->cu == NULL || per_cu->cu->partial_dies == NULL) |
| 18760 | load_partial_comp_unit (per_cu); |
| 18761 | |
| 18762 | per_cu->cu->last_used = 0; |
| 18763 | pd = find_partial_die_in_comp_unit (sect_off, per_cu->cu); |
| 18764 | } |
| 18765 | |
| 18766 | /* If we didn't find it, and not all dies have been loaded, |
| 18767 | load them all and try again. */ |
| 18768 | |
| 18769 | if (pd == NULL && per_cu->load_all_dies == 0) |
| 18770 | { |
| 18771 | per_cu->load_all_dies = 1; |
| 18772 | |
| 18773 | /* This is nasty. When we reread the DIEs, somewhere up the call chain |
| 18774 | THIS_CU->cu may already be in use. So we can't just free it and |
| 18775 | replace its DIEs with the ones we read in. Instead, we leave those |
| 18776 | DIEs alone (which can still be in use, e.g. in scan_partial_symbols), |
| 18777 | and clobber THIS_CU->cu->partial_dies with the hash table for the new |
| 18778 | set. */ |
| 18779 | load_partial_comp_unit (per_cu); |
| 18780 | |
| 18781 | pd = find_partial_die_in_comp_unit (sect_off, per_cu->cu); |
| 18782 | } |
| 18783 | |
| 18784 | if (pd == NULL) |
| 18785 | internal_error (__FILE__, __LINE__, |
| 18786 | _("could not find partial DIE 0x%x " |
| 18787 | "in cache [from module %s]\n"), |
| 18788 | to_underlying (sect_off), bfd_get_filename (objfile->obfd)); |
| 18789 | return pd; |
| 18790 | } |
| 18791 | |
| 18792 | /* See if we can figure out if the class lives in a namespace. We do |
| 18793 | this by looking for a member function; its demangled name will |
| 18794 | contain namespace info, if there is any. */ |
| 18795 | |
| 18796 | static void |
| 18797 | guess_partial_die_structure_name (struct partial_die_info *struct_pdi, |
| 18798 | struct dwarf2_cu *cu) |
| 18799 | { |
| 18800 | /* NOTE: carlton/2003-10-07: Getting the info this way changes |
| 18801 | what template types look like, because the demangler |
| 18802 | frequently doesn't give the same name as the debug info. We |
| 18803 | could fix this by only using the demangled name to get the |
| 18804 | prefix (but see comment in read_structure_type). */ |
| 18805 | |
| 18806 | struct partial_die_info *real_pdi; |
| 18807 | struct partial_die_info *child_pdi; |
| 18808 | |
| 18809 | /* If this DIE (this DIE's specification, if any) has a parent, then |
| 18810 | we should not do this. We'll prepend the parent's fully qualified |
| 18811 | name when we create the partial symbol. */ |
| 18812 | |
| 18813 | real_pdi = struct_pdi; |
| 18814 | while (real_pdi->has_specification) |
| 18815 | real_pdi = find_partial_die (real_pdi->spec_offset, |
| 18816 | real_pdi->spec_is_dwz, cu); |
| 18817 | |
| 18818 | if (real_pdi->die_parent != NULL) |
| 18819 | return; |
| 18820 | |
| 18821 | for (child_pdi = struct_pdi->die_child; |
| 18822 | child_pdi != NULL; |
| 18823 | child_pdi = child_pdi->die_sibling) |
| 18824 | { |
| 18825 | if (child_pdi->tag == DW_TAG_subprogram |
| 18826 | && child_pdi->linkage_name != NULL) |
| 18827 | { |
| 18828 | char *actual_class_name |
| 18829 | = language_class_name_from_physname (cu->language_defn, |
| 18830 | child_pdi->linkage_name); |
| 18831 | if (actual_class_name != NULL) |
| 18832 | { |
| 18833 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 18834 | struct_pdi->name |
| 18835 | = ((const char *) |
| 18836 | obstack_copy0 (&objfile->per_bfd->storage_obstack, |
| 18837 | actual_class_name, |
| 18838 | strlen (actual_class_name))); |
| 18839 | xfree (actual_class_name); |
| 18840 | } |
| 18841 | break; |
| 18842 | } |
| 18843 | } |
| 18844 | } |
| 18845 | |
| 18846 | /* Adjust PART_DIE before generating a symbol for it. This function |
| 18847 | may set the is_external flag or change the DIE's name. */ |
| 18848 | |
| 18849 | static void |
| 18850 | fixup_partial_die (struct partial_die_info *part_die, |
| 18851 | struct dwarf2_cu *cu) |
| 18852 | { |
| 18853 | /* Once we've fixed up a die, there's no point in doing so again. |
| 18854 | This also avoids a memory leak if we were to call |
| 18855 | guess_partial_die_structure_name multiple times. */ |
| 18856 | if (part_die->fixup_called) |
| 18857 | return; |
| 18858 | |
| 18859 | /* If we found a reference attribute and the DIE has no name, try |
| 18860 | to find a name in the referred to DIE. */ |
| 18861 | |
| 18862 | if (part_die->name == NULL && part_die->has_specification) |
| 18863 | { |
| 18864 | struct partial_die_info *spec_die; |
| 18865 | |
| 18866 | spec_die = find_partial_die (part_die->spec_offset, |
| 18867 | part_die->spec_is_dwz, cu); |
| 18868 | |
| 18869 | fixup_partial_die (spec_die, cu); |
| 18870 | |
| 18871 | if (spec_die->name) |
| 18872 | { |
| 18873 | part_die->name = spec_die->name; |
| 18874 | |
| 18875 | /* Copy DW_AT_external attribute if it is set. */ |
| 18876 | if (spec_die->is_external) |
| 18877 | part_die->is_external = spec_die->is_external; |
| 18878 | } |
| 18879 | } |
| 18880 | |
| 18881 | /* Set default names for some unnamed DIEs. */ |
| 18882 | |
| 18883 | if (part_die->name == NULL && part_die->tag == DW_TAG_namespace) |
| 18884 | part_die->name = CP_ANONYMOUS_NAMESPACE_STR; |
| 18885 | |
| 18886 | /* If there is no parent die to provide a namespace, and there are |
| 18887 | children, see if we can determine the namespace from their linkage |
| 18888 | name. */ |
| 18889 | if (cu->language == language_cplus |
| 18890 | && !VEC_empty (dwarf2_section_info_def, |
| 18891 | cu->per_cu->dwarf2_per_objfile->types) |
| 18892 | && part_die->die_parent == NULL |
| 18893 | && part_die->has_children |
| 18894 | && (part_die->tag == DW_TAG_class_type |
| 18895 | || part_die->tag == DW_TAG_structure_type |
| 18896 | || part_die->tag == DW_TAG_union_type)) |
| 18897 | guess_partial_die_structure_name (part_die, cu); |
| 18898 | |
| 18899 | /* GCC might emit a nameless struct or union that has a linkage |
| 18900 | name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ |
| 18901 | if (part_die->name == NULL |
| 18902 | && (part_die->tag == DW_TAG_class_type |
| 18903 | || part_die->tag == DW_TAG_interface_type |
| 18904 | || part_die->tag == DW_TAG_structure_type |
| 18905 | || part_die->tag == DW_TAG_union_type) |
| 18906 | && part_die->linkage_name != NULL) |
| 18907 | { |
| 18908 | char *demangled; |
| 18909 | |
| 18910 | demangled = gdb_demangle (part_die->linkage_name, DMGL_TYPES); |
| 18911 | if (demangled) |
| 18912 | { |
| 18913 | const char *base; |
| 18914 | |
| 18915 | /* Strip any leading namespaces/classes, keep only the base name. |
| 18916 | DW_AT_name for named DIEs does not contain the prefixes. */ |
| 18917 | base = strrchr (demangled, ':'); |
| 18918 | if (base && base > demangled && base[-1] == ':') |
| 18919 | base++; |
| 18920 | else |
| 18921 | base = demangled; |
| 18922 | |
| 18923 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 18924 | part_die->name |
| 18925 | = ((const char *) |
| 18926 | obstack_copy0 (&objfile->per_bfd->storage_obstack, |
| 18927 | base, strlen (base))); |
| 18928 | xfree (demangled); |
| 18929 | } |
| 18930 | } |
| 18931 | |
| 18932 | part_die->fixup_called = 1; |
| 18933 | } |
| 18934 | |
| 18935 | /* Read an attribute value described by an attribute form. */ |
| 18936 | |
| 18937 | static const gdb_byte * |
| 18938 | read_attribute_value (const struct die_reader_specs *reader, |
| 18939 | struct attribute *attr, unsigned form, |
| 18940 | LONGEST implicit_const, const gdb_byte *info_ptr) |
| 18941 | { |
| 18942 | struct dwarf2_cu *cu = reader->cu; |
| 18943 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 18944 | = cu->per_cu->dwarf2_per_objfile; |
| 18945 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 18946 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
| 18947 | bfd *abfd = reader->abfd; |
| 18948 | struct comp_unit_head *cu_header = &cu->header; |
| 18949 | unsigned int bytes_read; |
| 18950 | struct dwarf_block *blk; |
| 18951 | |
| 18952 | attr->form = (enum dwarf_form) form; |
| 18953 | switch (form) |
| 18954 | { |
| 18955 | case DW_FORM_ref_addr: |
| 18956 | if (cu->header.version == 2) |
| 18957 | DW_UNSND (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
| 18958 | else |
| 18959 | DW_UNSND (attr) = read_offset (abfd, info_ptr, |
| 18960 | &cu->header, &bytes_read); |
| 18961 | info_ptr += bytes_read; |
| 18962 | break; |
| 18963 | case DW_FORM_GNU_ref_alt: |
| 18964 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); |
| 18965 | info_ptr += bytes_read; |
| 18966 | break; |
| 18967 | case DW_FORM_addr: |
| 18968 | DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
| 18969 | DW_ADDR (attr) = gdbarch_adjust_dwarf2_addr (gdbarch, DW_ADDR (attr)); |
| 18970 | info_ptr += bytes_read; |
| 18971 | break; |
| 18972 | case DW_FORM_block2: |
| 18973 | blk = dwarf_alloc_block (cu); |
| 18974 | blk->size = read_2_bytes (abfd, info_ptr); |
| 18975 | info_ptr += 2; |
| 18976 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); |
| 18977 | info_ptr += blk->size; |
| 18978 | DW_BLOCK (attr) = blk; |
| 18979 | break; |
| 18980 | case DW_FORM_block4: |
| 18981 | blk = dwarf_alloc_block (cu); |
| 18982 | blk->size = read_4_bytes (abfd, info_ptr); |
| 18983 | info_ptr += 4; |
| 18984 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); |
| 18985 | info_ptr += blk->size; |
| 18986 | DW_BLOCK (attr) = blk; |
| 18987 | break; |
| 18988 | case DW_FORM_data2: |
| 18989 | DW_UNSND (attr) = read_2_bytes (abfd, info_ptr); |
| 18990 | info_ptr += 2; |
| 18991 | break; |
| 18992 | case DW_FORM_data4: |
| 18993 | DW_UNSND (attr) = read_4_bytes (abfd, info_ptr); |
| 18994 | info_ptr += 4; |
| 18995 | break; |
| 18996 | case DW_FORM_data8: |
| 18997 | DW_UNSND (attr) = read_8_bytes (abfd, info_ptr); |
| 18998 | info_ptr += 8; |
| 18999 | break; |
| 19000 | case DW_FORM_data16: |
| 19001 | blk = dwarf_alloc_block (cu); |
| 19002 | blk->size = 16; |
| 19003 | blk->data = read_n_bytes (abfd, info_ptr, 16); |
| 19004 | info_ptr += 16; |
| 19005 | DW_BLOCK (attr) = blk; |
| 19006 | break; |
| 19007 | case DW_FORM_sec_offset: |
| 19008 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); |
| 19009 | info_ptr += bytes_read; |
| 19010 | break; |
| 19011 | case DW_FORM_string: |
| 19012 | DW_STRING (attr) = read_direct_string (abfd, info_ptr, &bytes_read); |
| 19013 | DW_STRING_IS_CANONICAL (attr) = 0; |
| 19014 | info_ptr += bytes_read; |
| 19015 | break; |
| 19016 | case DW_FORM_strp: |
| 19017 | if (!cu->per_cu->is_dwz) |
| 19018 | { |
| 19019 | DW_STRING (attr) = read_indirect_string (dwarf2_per_objfile, |
| 19020 | abfd, info_ptr, cu_header, |
| 19021 | &bytes_read); |
| 19022 | DW_STRING_IS_CANONICAL (attr) = 0; |
| 19023 | info_ptr += bytes_read; |
| 19024 | break; |
| 19025 | } |
| 19026 | /* FALLTHROUGH */ |
| 19027 | case DW_FORM_line_strp: |
| 19028 | if (!cu->per_cu->is_dwz) |
| 19029 | { |
| 19030 | DW_STRING (attr) = read_indirect_line_string (dwarf2_per_objfile, |
| 19031 | abfd, info_ptr, |
| 19032 | cu_header, &bytes_read); |
| 19033 | DW_STRING_IS_CANONICAL (attr) = 0; |
| 19034 | info_ptr += bytes_read; |
| 19035 | break; |
| 19036 | } |
| 19037 | /* FALLTHROUGH */ |
| 19038 | case DW_FORM_GNU_strp_alt: |
| 19039 | { |
| 19040 | struct dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
| 19041 | LONGEST str_offset = read_offset (abfd, info_ptr, cu_header, |
| 19042 | &bytes_read); |
| 19043 | |
| 19044 | DW_STRING (attr) = read_indirect_string_from_dwz (objfile, |
| 19045 | dwz, str_offset); |
| 19046 | DW_STRING_IS_CANONICAL (attr) = 0; |
| 19047 | info_ptr += bytes_read; |
| 19048 | } |
| 19049 | break; |
| 19050 | case DW_FORM_exprloc: |
| 19051 | case DW_FORM_block: |
| 19052 | blk = dwarf_alloc_block (cu); |
| 19053 | blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
| 19054 | info_ptr += bytes_read; |
| 19055 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); |
| 19056 | info_ptr += blk->size; |
| 19057 | DW_BLOCK (attr) = blk; |
| 19058 | break; |
| 19059 | case DW_FORM_block1: |
| 19060 | blk = dwarf_alloc_block (cu); |
| 19061 | blk->size = read_1_byte (abfd, info_ptr); |
| 19062 | info_ptr += 1; |
| 19063 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); |
| 19064 | info_ptr += blk->size; |
| 19065 | DW_BLOCK (attr) = blk; |
| 19066 | break; |
| 19067 | case DW_FORM_data1: |
| 19068 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); |
| 19069 | info_ptr += 1; |
| 19070 | break; |
| 19071 | case DW_FORM_flag: |
| 19072 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); |
| 19073 | info_ptr += 1; |
| 19074 | break; |
| 19075 | case DW_FORM_flag_present: |
| 19076 | DW_UNSND (attr) = 1; |
| 19077 | break; |
| 19078 | case DW_FORM_sdata: |
| 19079 | DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read); |
| 19080 | info_ptr += bytes_read; |
| 19081 | break; |
| 19082 | case DW_FORM_udata: |
| 19083 | DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
| 19084 | info_ptr += bytes_read; |
| 19085 | break; |
| 19086 | case DW_FORM_ref1: |
| 19087 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
| 19088 | + read_1_byte (abfd, info_ptr)); |
| 19089 | info_ptr += 1; |
| 19090 | break; |
| 19091 | case DW_FORM_ref2: |
| 19092 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
| 19093 | + read_2_bytes (abfd, info_ptr)); |
| 19094 | info_ptr += 2; |
| 19095 | break; |
| 19096 | case DW_FORM_ref4: |
| 19097 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
| 19098 | + read_4_bytes (abfd, info_ptr)); |
| 19099 | info_ptr += 4; |
| 19100 | break; |
| 19101 | case DW_FORM_ref8: |
| 19102 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
| 19103 | + read_8_bytes (abfd, info_ptr)); |
| 19104 | info_ptr += 8; |
| 19105 | break; |
| 19106 | case DW_FORM_ref_sig8: |
| 19107 | DW_SIGNATURE (attr) = read_8_bytes (abfd, info_ptr); |
| 19108 | info_ptr += 8; |
| 19109 | break; |
| 19110 | case DW_FORM_ref_udata: |
| 19111 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
| 19112 | + read_unsigned_leb128 (abfd, info_ptr, &bytes_read)); |
| 19113 | info_ptr += bytes_read; |
| 19114 | break; |
| 19115 | case DW_FORM_indirect: |
| 19116 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
| 19117 | info_ptr += bytes_read; |
| 19118 | if (form == DW_FORM_implicit_const) |
| 19119 | { |
| 19120 | implicit_const = read_signed_leb128 (abfd, info_ptr, &bytes_read); |
| 19121 | info_ptr += bytes_read; |
| 19122 | } |
| 19123 | info_ptr = read_attribute_value (reader, attr, form, implicit_const, |
| 19124 | info_ptr); |
| 19125 | break; |
| 19126 | case DW_FORM_implicit_const: |
| 19127 | DW_SND (attr) = implicit_const; |
| 19128 | break; |
| 19129 | case DW_FORM_GNU_addr_index: |
| 19130 | if (reader->dwo_file == NULL) |
| 19131 | { |
| 19132 | /* For now flag a hard error. |
| 19133 | Later we can turn this into a complaint. */ |
| 19134 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), |
| 19135 | dwarf_form_name (form), |
| 19136 | bfd_get_filename (abfd)); |
| 19137 | } |
| 19138 | DW_ADDR (attr) = read_addr_index_from_leb128 (cu, info_ptr, &bytes_read); |
| 19139 | info_ptr += bytes_read; |
| 19140 | break; |
| 19141 | case DW_FORM_GNU_str_index: |
| 19142 | if (reader->dwo_file == NULL) |
| 19143 | { |
| 19144 | /* For now flag a hard error. |
| 19145 | Later we can turn this into a complaint if warranted. */ |
| 19146 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), |
| 19147 | dwarf_form_name (form), |
| 19148 | bfd_get_filename (abfd)); |
| 19149 | } |
| 19150 | { |
| 19151 | ULONGEST str_index = |
| 19152 | read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
| 19153 | |
| 19154 | DW_STRING (attr) = read_str_index (reader, str_index); |
| 19155 | DW_STRING_IS_CANONICAL (attr) = 0; |
| 19156 | info_ptr += bytes_read; |
| 19157 | } |
| 19158 | break; |
| 19159 | default: |
| 19160 | error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"), |
| 19161 | dwarf_form_name (form), |
| 19162 | bfd_get_filename (abfd)); |
| 19163 | } |
| 19164 | |
| 19165 | /* Super hack. */ |
| 19166 | if (cu->per_cu->is_dwz && attr_form_is_ref (attr)) |
| 19167 | attr->form = DW_FORM_GNU_ref_alt; |
| 19168 | |
| 19169 | /* We have seen instances where the compiler tried to emit a byte |
| 19170 | size attribute of -1 which ended up being encoded as an unsigned |
| 19171 | 0xffffffff. Although 0xffffffff is technically a valid size value, |
| 19172 | an object of this size seems pretty unlikely so we can relatively |
| 19173 | safely treat these cases as if the size attribute was invalid and |
| 19174 | treat them as zero by default. */ |
| 19175 | if (attr->name == DW_AT_byte_size |
| 19176 | && form == DW_FORM_data4 |
| 19177 | && DW_UNSND (attr) >= 0xffffffff) |
| 19178 | { |
| 19179 | complaint |
| 19180 | (&symfile_complaints, |
| 19181 | _("Suspicious DW_AT_byte_size value treated as zero instead of %s"), |
| 19182 | hex_string (DW_UNSND (attr))); |
| 19183 | DW_UNSND (attr) = 0; |
| 19184 | } |
| 19185 | |
| 19186 | return info_ptr; |
| 19187 | } |
| 19188 | |
| 19189 | /* Read an attribute described by an abbreviated attribute. */ |
| 19190 | |
| 19191 | static const gdb_byte * |
| 19192 | read_attribute (const struct die_reader_specs *reader, |
| 19193 | struct attribute *attr, struct attr_abbrev *abbrev, |
| 19194 | const gdb_byte *info_ptr) |
| 19195 | { |
| 19196 | attr->name = abbrev->name; |
| 19197 | return read_attribute_value (reader, attr, abbrev->form, |
| 19198 | abbrev->implicit_const, info_ptr); |
| 19199 | } |
| 19200 | |
| 19201 | /* Read dwarf information from a buffer. */ |
| 19202 | |
| 19203 | static unsigned int |
| 19204 | read_1_byte (bfd *abfd, const gdb_byte *buf) |
| 19205 | { |
| 19206 | return bfd_get_8 (abfd, buf); |
| 19207 | } |
| 19208 | |
| 19209 | static int |
| 19210 | read_1_signed_byte (bfd *abfd, const gdb_byte *buf) |
| 19211 | { |
| 19212 | return bfd_get_signed_8 (abfd, buf); |
| 19213 | } |
| 19214 | |
| 19215 | static unsigned int |
| 19216 | read_2_bytes (bfd *abfd, const gdb_byte *buf) |
| 19217 | { |
| 19218 | return bfd_get_16 (abfd, buf); |
| 19219 | } |
| 19220 | |
| 19221 | static int |
| 19222 | read_2_signed_bytes (bfd *abfd, const gdb_byte *buf) |
| 19223 | { |
| 19224 | return bfd_get_signed_16 (abfd, buf); |
| 19225 | } |
| 19226 | |
| 19227 | static unsigned int |
| 19228 | read_4_bytes (bfd *abfd, const gdb_byte *buf) |
| 19229 | { |
| 19230 | return bfd_get_32 (abfd, buf); |
| 19231 | } |
| 19232 | |
| 19233 | static int |
| 19234 | read_4_signed_bytes (bfd *abfd, const gdb_byte *buf) |
| 19235 | { |
| 19236 | return bfd_get_signed_32 (abfd, buf); |
| 19237 | } |
| 19238 | |
| 19239 | static ULONGEST |
| 19240 | read_8_bytes (bfd *abfd, const gdb_byte *buf) |
| 19241 | { |
| 19242 | return bfd_get_64 (abfd, buf); |
| 19243 | } |
| 19244 | |
| 19245 | static CORE_ADDR |
| 19246 | read_address (bfd *abfd, const gdb_byte *buf, struct dwarf2_cu *cu, |
| 19247 | unsigned int *bytes_read) |
| 19248 | { |
| 19249 | struct comp_unit_head *cu_header = &cu->header; |
| 19250 | CORE_ADDR retval = 0; |
| 19251 | |
| 19252 | if (cu_header->signed_addr_p) |
| 19253 | { |
| 19254 | switch (cu_header->addr_size) |
| 19255 | { |
| 19256 | case 2: |
| 19257 | retval = bfd_get_signed_16 (abfd, buf); |
| 19258 | break; |
| 19259 | case 4: |
| 19260 | retval = bfd_get_signed_32 (abfd, buf); |
| 19261 | break; |
| 19262 | case 8: |
| 19263 | retval = bfd_get_signed_64 (abfd, buf); |
| 19264 | break; |
| 19265 | default: |
| 19266 | internal_error (__FILE__, __LINE__, |
| 19267 | _("read_address: bad switch, signed [in module %s]"), |
| 19268 | bfd_get_filename (abfd)); |
| 19269 | } |
| 19270 | } |
| 19271 | else |
| 19272 | { |
| 19273 | switch (cu_header->addr_size) |
| 19274 | { |
| 19275 | case 2: |
| 19276 | retval = bfd_get_16 (abfd, buf); |
| 19277 | break; |
| 19278 | case 4: |
| 19279 | retval = bfd_get_32 (abfd, buf); |
| 19280 | break; |
| 19281 | case 8: |
| 19282 | retval = bfd_get_64 (abfd, buf); |
| 19283 | break; |
| 19284 | default: |
| 19285 | internal_error (__FILE__, __LINE__, |
| 19286 | _("read_address: bad switch, " |
| 19287 | "unsigned [in module %s]"), |
| 19288 | bfd_get_filename (abfd)); |
| 19289 | } |
| 19290 | } |
| 19291 | |
| 19292 | *bytes_read = cu_header->addr_size; |
| 19293 | return retval; |
| 19294 | } |
| 19295 | |
| 19296 | /* Read the initial length from a section. The (draft) DWARF 3 |
| 19297 | specification allows the initial length to take up either 4 bytes |
| 19298 | or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8 |
| 19299 | bytes describe the length and all offsets will be 8 bytes in length |
| 19300 | instead of 4. |
| 19301 | |
| 19302 | An older, non-standard 64-bit format is also handled by this |
| 19303 | function. The older format in question stores the initial length |
| 19304 | as an 8-byte quantity without an escape value. Lengths greater |
| 19305 | than 2^32 aren't very common which means that the initial 4 bytes |
| 19306 | is almost always zero. Since a length value of zero doesn't make |
| 19307 | sense for the 32-bit format, this initial zero can be considered to |
| 19308 | be an escape value which indicates the presence of the older 64-bit |
| 19309 | format. As written, the code can't detect (old format) lengths |
| 19310 | greater than 4GB. If it becomes necessary to handle lengths |
| 19311 | somewhat larger than 4GB, we could allow other small values (such |
| 19312 | as the non-sensical values of 1, 2, and 3) to also be used as |
| 19313 | escape values indicating the presence of the old format. |
| 19314 | |
| 19315 | The value returned via bytes_read should be used to increment the |
| 19316 | relevant pointer after calling read_initial_length(). |
| 19317 | |
| 19318 | [ Note: read_initial_length() and read_offset() are based on the |
| 19319 | document entitled "DWARF Debugging Information Format", revision |
| 19320 | 3, draft 8, dated November 19, 2001. This document was obtained |
| 19321 | from: |
| 19322 | |
| 19323 | http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf |
| 19324 | |
| 19325 | This document is only a draft and is subject to change. (So beware.) |
| 19326 | |
| 19327 | Details regarding the older, non-standard 64-bit format were |
| 19328 | determined empirically by examining 64-bit ELF files produced by |
| 19329 | the SGI toolchain on an IRIX 6.5 machine. |
| 19330 | |
| 19331 | - Kevin, July 16, 2002 |
| 19332 | ] */ |
| 19333 | |
| 19334 | static LONGEST |
| 19335 | read_initial_length (bfd *abfd, const gdb_byte *buf, unsigned int *bytes_read) |
| 19336 | { |
| 19337 | LONGEST length = bfd_get_32 (abfd, buf); |
| 19338 | |
| 19339 | if (length == 0xffffffff) |
| 19340 | { |
| 19341 | length = bfd_get_64 (abfd, buf + 4); |
| 19342 | *bytes_read = 12; |
| 19343 | } |
| 19344 | else if (length == 0) |
| 19345 | { |
| 19346 | /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */ |
| 19347 | length = bfd_get_64 (abfd, buf); |
| 19348 | *bytes_read = 8; |
| 19349 | } |
| 19350 | else |
| 19351 | { |
| 19352 | *bytes_read = 4; |
| 19353 | } |
| 19354 | |
| 19355 | return length; |
| 19356 | } |
| 19357 | |
| 19358 | /* Cover function for read_initial_length. |
| 19359 | Returns the length of the object at BUF, and stores the size of the |
| 19360 | initial length in *BYTES_READ and stores the size that offsets will be in |
| 19361 | *OFFSET_SIZE. |
| 19362 | If the initial length size is not equivalent to that specified in |
| 19363 | CU_HEADER then issue a complaint. |
| 19364 | This is useful when reading non-comp-unit headers. */ |
| 19365 | |
| 19366 | static LONGEST |
| 19367 | read_checked_initial_length_and_offset (bfd *abfd, const gdb_byte *buf, |
| 19368 | const struct comp_unit_head *cu_header, |
| 19369 | unsigned int *bytes_read, |
| 19370 | unsigned int *offset_size) |
| 19371 | { |
| 19372 | LONGEST length = read_initial_length (abfd, buf, bytes_read); |
| 19373 | |
| 19374 | gdb_assert (cu_header->initial_length_size == 4 |
| 19375 | || cu_header->initial_length_size == 8 |
| 19376 | || cu_header->initial_length_size == 12); |
| 19377 | |
| 19378 | if (cu_header->initial_length_size != *bytes_read) |
| 19379 | complaint (&symfile_complaints, |
| 19380 | _("intermixed 32-bit and 64-bit DWARF sections")); |
| 19381 | |
| 19382 | *offset_size = (*bytes_read == 4) ? 4 : 8; |
| 19383 | return length; |
| 19384 | } |
| 19385 | |
| 19386 | /* Read an offset from the data stream. The size of the offset is |
| 19387 | given by cu_header->offset_size. */ |
| 19388 | |
| 19389 | static LONGEST |
| 19390 | read_offset (bfd *abfd, const gdb_byte *buf, |
| 19391 | const struct comp_unit_head *cu_header, |
| 19392 | unsigned int *bytes_read) |
| 19393 | { |
| 19394 | LONGEST offset = read_offset_1 (abfd, buf, cu_header->offset_size); |
| 19395 | |
| 19396 | *bytes_read = cu_header->offset_size; |
| 19397 | return offset; |
| 19398 | } |
| 19399 | |
| 19400 | /* Read an offset from the data stream. */ |
| 19401 | |
| 19402 | static LONGEST |
| 19403 | read_offset_1 (bfd *abfd, const gdb_byte *buf, unsigned int offset_size) |
| 19404 | { |
| 19405 | LONGEST retval = 0; |
| 19406 | |
| 19407 | switch (offset_size) |
| 19408 | { |
| 19409 | case 4: |
| 19410 | retval = bfd_get_32 (abfd, buf); |
| 19411 | break; |
| 19412 | case 8: |
| 19413 | retval = bfd_get_64 (abfd, buf); |
| 19414 | break; |
| 19415 | default: |
| 19416 | internal_error (__FILE__, __LINE__, |
| 19417 | _("read_offset_1: bad switch [in module %s]"), |
| 19418 | bfd_get_filename (abfd)); |
| 19419 | } |
| 19420 | |
| 19421 | return retval; |
| 19422 | } |
| 19423 | |
| 19424 | static const gdb_byte * |
| 19425 | read_n_bytes (bfd *abfd, const gdb_byte *buf, unsigned int size) |
| 19426 | { |
| 19427 | /* If the size of a host char is 8 bits, we can return a pointer |
| 19428 | to the buffer, otherwise we have to copy the data to a buffer |
| 19429 | allocated on the temporary obstack. */ |
| 19430 | gdb_assert (HOST_CHAR_BIT == 8); |
| 19431 | return buf; |
| 19432 | } |
| 19433 | |
| 19434 | static const char * |
| 19435 | read_direct_string (bfd *abfd, const gdb_byte *buf, |
| 19436 | unsigned int *bytes_read_ptr) |
| 19437 | { |
| 19438 | /* If the size of a host char is 8 bits, we can return a pointer |
| 19439 | to the string, otherwise we have to copy the string to a buffer |
| 19440 | allocated on the temporary obstack. */ |
| 19441 | gdb_assert (HOST_CHAR_BIT == 8); |
| 19442 | if (*buf == '\0') |
| 19443 | { |
| 19444 | *bytes_read_ptr = 1; |
| 19445 | return NULL; |
| 19446 | } |
| 19447 | *bytes_read_ptr = strlen ((const char *) buf) + 1; |
| 19448 | return (const char *) buf; |
| 19449 | } |
| 19450 | |
| 19451 | /* Return pointer to string at section SECT offset STR_OFFSET with error |
| 19452 | reporting strings FORM_NAME and SECT_NAME. */ |
| 19453 | |
| 19454 | static const char * |
| 19455 | read_indirect_string_at_offset_from (struct objfile *objfile, |
| 19456 | bfd *abfd, LONGEST str_offset, |
| 19457 | struct dwarf2_section_info *sect, |
| 19458 | const char *form_name, |
| 19459 | const char *sect_name) |
| 19460 | { |
| 19461 | dwarf2_read_section (objfile, sect); |
| 19462 | if (sect->buffer == NULL) |
| 19463 | error (_("%s used without %s section [in module %s]"), |
| 19464 | form_name, sect_name, bfd_get_filename (abfd)); |
| 19465 | if (str_offset >= sect->size) |
| 19466 | error (_("%s pointing outside of %s section [in module %s]"), |
| 19467 | form_name, sect_name, bfd_get_filename (abfd)); |
| 19468 | gdb_assert (HOST_CHAR_BIT == 8); |
| 19469 | if (sect->buffer[str_offset] == '\0') |
| 19470 | return NULL; |
| 19471 | return (const char *) (sect->buffer + str_offset); |
| 19472 | } |
| 19473 | |
| 19474 | /* Return pointer to string at .debug_str offset STR_OFFSET. */ |
| 19475 | |
| 19476 | static const char * |
| 19477 | read_indirect_string_at_offset (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 19478 | bfd *abfd, LONGEST str_offset) |
| 19479 | { |
| 19480 | return read_indirect_string_at_offset_from (dwarf2_per_objfile->objfile, |
| 19481 | abfd, str_offset, |
| 19482 | &dwarf2_per_objfile->str, |
| 19483 | "DW_FORM_strp", ".debug_str"); |
| 19484 | } |
| 19485 | |
| 19486 | /* Return pointer to string at .debug_line_str offset STR_OFFSET. */ |
| 19487 | |
| 19488 | static const char * |
| 19489 | read_indirect_line_string_at_offset (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 19490 | bfd *abfd, LONGEST str_offset) |
| 19491 | { |
| 19492 | return read_indirect_string_at_offset_from (dwarf2_per_objfile->objfile, |
| 19493 | abfd, str_offset, |
| 19494 | &dwarf2_per_objfile->line_str, |
| 19495 | "DW_FORM_line_strp", |
| 19496 | ".debug_line_str"); |
| 19497 | } |
| 19498 | |
| 19499 | /* Read a string at offset STR_OFFSET in the .debug_str section from |
| 19500 | the .dwz file DWZ. Throw an error if the offset is too large. If |
| 19501 | the string consists of a single NUL byte, return NULL; otherwise |
| 19502 | return a pointer to the string. */ |
| 19503 | |
| 19504 | static const char * |
| 19505 | read_indirect_string_from_dwz (struct objfile *objfile, struct dwz_file *dwz, |
| 19506 | LONGEST str_offset) |
| 19507 | { |
| 19508 | dwarf2_read_section (objfile, &dwz->str); |
| 19509 | |
| 19510 | if (dwz->str.buffer == NULL) |
| 19511 | error (_("DW_FORM_GNU_strp_alt used without .debug_str " |
| 19512 | "section [in module %s]"), |
| 19513 | bfd_get_filename (dwz->dwz_bfd)); |
| 19514 | if (str_offset >= dwz->str.size) |
| 19515 | error (_("DW_FORM_GNU_strp_alt pointing outside of " |
| 19516 | ".debug_str section [in module %s]"), |
| 19517 | bfd_get_filename (dwz->dwz_bfd)); |
| 19518 | gdb_assert (HOST_CHAR_BIT == 8); |
| 19519 | if (dwz->str.buffer[str_offset] == '\0') |
| 19520 | return NULL; |
| 19521 | return (const char *) (dwz->str.buffer + str_offset); |
| 19522 | } |
| 19523 | |
| 19524 | /* Return pointer to string at .debug_str offset as read from BUF. |
| 19525 | BUF is assumed to be in a compilation unit described by CU_HEADER. |
| 19526 | Return *BYTES_READ_PTR count of bytes read from BUF. */ |
| 19527 | |
| 19528 | static const char * |
| 19529 | read_indirect_string (struct dwarf2_per_objfile *dwarf2_per_objfile, bfd *abfd, |
| 19530 | const gdb_byte *buf, |
| 19531 | const struct comp_unit_head *cu_header, |
| 19532 | unsigned int *bytes_read_ptr) |
| 19533 | { |
| 19534 | LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr); |
| 19535 | |
| 19536 | return read_indirect_string_at_offset (dwarf2_per_objfile, abfd, str_offset); |
| 19537 | } |
| 19538 | |
| 19539 | /* Return pointer to string at .debug_line_str offset as read from BUF. |
| 19540 | BUF is assumed to be in a compilation unit described by CU_HEADER. |
| 19541 | Return *BYTES_READ_PTR count of bytes read from BUF. */ |
| 19542 | |
| 19543 | static const char * |
| 19544 | read_indirect_line_string (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 19545 | bfd *abfd, const gdb_byte *buf, |
| 19546 | const struct comp_unit_head *cu_header, |
| 19547 | unsigned int *bytes_read_ptr) |
| 19548 | { |
| 19549 | LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr); |
| 19550 | |
| 19551 | return read_indirect_line_string_at_offset (dwarf2_per_objfile, abfd, |
| 19552 | str_offset); |
| 19553 | } |
| 19554 | |
| 19555 | ULONGEST |
| 19556 | read_unsigned_leb128 (bfd *abfd, const gdb_byte *buf, |
| 19557 | unsigned int *bytes_read_ptr) |
| 19558 | { |
| 19559 | ULONGEST result; |
| 19560 | unsigned int num_read; |
| 19561 | int shift; |
| 19562 | unsigned char byte; |
| 19563 | |
| 19564 | result = 0; |
| 19565 | shift = 0; |
| 19566 | num_read = 0; |
| 19567 | while (1) |
| 19568 | { |
| 19569 | byte = bfd_get_8 (abfd, buf); |
| 19570 | buf++; |
| 19571 | num_read++; |
| 19572 | result |= ((ULONGEST) (byte & 127) << shift); |
| 19573 | if ((byte & 128) == 0) |
| 19574 | { |
| 19575 | break; |
| 19576 | } |
| 19577 | shift += 7; |
| 19578 | } |
| 19579 | *bytes_read_ptr = num_read; |
| 19580 | return result; |
| 19581 | } |
| 19582 | |
| 19583 | static LONGEST |
| 19584 | read_signed_leb128 (bfd *abfd, const gdb_byte *buf, |
| 19585 | unsigned int *bytes_read_ptr) |
| 19586 | { |
| 19587 | LONGEST result; |
| 19588 | int shift, num_read; |
| 19589 | unsigned char byte; |
| 19590 | |
| 19591 | result = 0; |
| 19592 | shift = 0; |
| 19593 | num_read = 0; |
| 19594 | while (1) |
| 19595 | { |
| 19596 | byte = bfd_get_8 (abfd, buf); |
| 19597 | buf++; |
| 19598 | num_read++; |
| 19599 | result |= ((LONGEST) (byte & 127) << shift); |
| 19600 | shift += 7; |
| 19601 | if ((byte & 128) == 0) |
| 19602 | { |
| 19603 | break; |
| 19604 | } |
| 19605 | } |
| 19606 | if ((shift < 8 * sizeof (result)) && (byte & 0x40)) |
| 19607 | result |= -(((LONGEST) 1) << shift); |
| 19608 | *bytes_read_ptr = num_read; |
| 19609 | return result; |
| 19610 | } |
| 19611 | |
| 19612 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. |
| 19613 | ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero. |
| 19614 | ADDR_SIZE is the size of addresses from the CU header. */ |
| 19615 | |
| 19616 | static CORE_ADDR |
| 19617 | read_addr_index_1 (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 19618 | unsigned int addr_index, ULONGEST addr_base, int addr_size) |
| 19619 | { |
| 19620 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 19621 | bfd *abfd = objfile->obfd; |
| 19622 | const gdb_byte *info_ptr; |
| 19623 | |
| 19624 | dwarf2_read_section (objfile, &dwarf2_per_objfile->addr); |
| 19625 | if (dwarf2_per_objfile->addr.buffer == NULL) |
| 19626 | error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"), |
| 19627 | objfile_name (objfile)); |
| 19628 | if (addr_base + addr_index * addr_size >= dwarf2_per_objfile->addr.size) |
| 19629 | error (_("DW_FORM_addr_index pointing outside of " |
| 19630 | ".debug_addr section [in module %s]"), |
| 19631 | objfile_name (objfile)); |
| 19632 | info_ptr = (dwarf2_per_objfile->addr.buffer |
| 19633 | + addr_base + addr_index * addr_size); |
| 19634 | if (addr_size == 4) |
| 19635 | return bfd_get_32 (abfd, info_ptr); |
| 19636 | else |
| 19637 | return bfd_get_64 (abfd, info_ptr); |
| 19638 | } |
| 19639 | |
| 19640 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. */ |
| 19641 | |
| 19642 | static CORE_ADDR |
| 19643 | read_addr_index (struct dwarf2_cu *cu, unsigned int addr_index) |
| 19644 | { |
| 19645 | return read_addr_index_1 (cu->per_cu->dwarf2_per_objfile, addr_index, |
| 19646 | cu->addr_base, cu->header.addr_size); |
| 19647 | } |
| 19648 | |
| 19649 | /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */ |
| 19650 | |
| 19651 | static CORE_ADDR |
| 19652 | read_addr_index_from_leb128 (struct dwarf2_cu *cu, const gdb_byte *info_ptr, |
| 19653 | unsigned int *bytes_read) |
| 19654 | { |
| 19655 | bfd *abfd = cu->per_cu->dwarf2_per_objfile->objfile->obfd; |
| 19656 | unsigned int addr_index = read_unsigned_leb128 (abfd, info_ptr, bytes_read); |
| 19657 | |
| 19658 | return read_addr_index (cu, addr_index); |
| 19659 | } |
| 19660 | |
| 19661 | /* Data structure to pass results from dwarf2_read_addr_index_reader |
| 19662 | back to dwarf2_read_addr_index. */ |
| 19663 | |
| 19664 | struct dwarf2_read_addr_index_data |
| 19665 | { |
| 19666 | ULONGEST addr_base; |
| 19667 | int addr_size; |
| 19668 | }; |
| 19669 | |
| 19670 | /* die_reader_func for dwarf2_read_addr_index. */ |
| 19671 | |
| 19672 | static void |
| 19673 | dwarf2_read_addr_index_reader (const struct die_reader_specs *reader, |
| 19674 | const gdb_byte *info_ptr, |
| 19675 | struct die_info *comp_unit_die, |
| 19676 | int has_children, |
| 19677 | void *data) |
| 19678 | { |
| 19679 | struct dwarf2_cu *cu = reader->cu; |
| 19680 | struct dwarf2_read_addr_index_data *aidata = |
| 19681 | (struct dwarf2_read_addr_index_data *) data; |
| 19682 | |
| 19683 | aidata->addr_base = cu->addr_base; |
| 19684 | aidata->addr_size = cu->header.addr_size; |
| 19685 | } |
| 19686 | |
| 19687 | /* Given an index in .debug_addr, fetch the value. |
| 19688 | NOTE: This can be called during dwarf expression evaluation, |
| 19689 | long after the debug information has been read, and thus per_cu->cu |
| 19690 | may no longer exist. */ |
| 19691 | |
| 19692 | CORE_ADDR |
| 19693 | dwarf2_read_addr_index (struct dwarf2_per_cu_data *per_cu, |
| 19694 | unsigned int addr_index) |
| 19695 | { |
| 19696 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
| 19697 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 19698 | struct dwarf2_cu *cu = per_cu->cu; |
| 19699 | ULONGEST addr_base; |
| 19700 | int addr_size; |
| 19701 | |
| 19702 | /* We need addr_base and addr_size. |
| 19703 | If we don't have PER_CU->cu, we have to get it. |
| 19704 | Nasty, but the alternative is storing the needed info in PER_CU, |
| 19705 | which at this point doesn't seem justified: it's not clear how frequently |
| 19706 | it would get used and it would increase the size of every PER_CU. |
| 19707 | Entry points like dwarf2_per_cu_addr_size do a similar thing |
| 19708 | so we're not in uncharted territory here. |
| 19709 | Alas we need to be a bit more complicated as addr_base is contained |
| 19710 | in the DIE. |
| 19711 | |
| 19712 | We don't need to read the entire CU(/TU). |
| 19713 | We just need the header and top level die. |
| 19714 | |
| 19715 | IWBN to use the aging mechanism to let us lazily later discard the CU. |
| 19716 | For now we skip this optimization. */ |
| 19717 | |
| 19718 | if (cu != NULL) |
| 19719 | { |
| 19720 | addr_base = cu->addr_base; |
| 19721 | addr_size = cu->header.addr_size; |
| 19722 | } |
| 19723 | else |
| 19724 | { |
| 19725 | struct dwarf2_read_addr_index_data aidata; |
| 19726 | |
| 19727 | /* Note: We can't use init_cutu_and_read_dies_simple here, |
| 19728 | we need addr_base. */ |
| 19729 | init_cutu_and_read_dies (per_cu, NULL, 0, 0, |
| 19730 | dwarf2_read_addr_index_reader, &aidata); |
| 19731 | addr_base = aidata.addr_base; |
| 19732 | addr_size = aidata.addr_size; |
| 19733 | } |
| 19734 | |
| 19735 | return read_addr_index_1 (dwarf2_per_objfile, addr_index, addr_base, |
| 19736 | addr_size); |
| 19737 | } |
| 19738 | |
| 19739 | /* Given a DW_FORM_GNU_str_index, fetch the string. |
| 19740 | This is only used by the Fission support. */ |
| 19741 | |
| 19742 | static const char * |
| 19743 | read_str_index (const struct die_reader_specs *reader, ULONGEST str_index) |
| 19744 | { |
| 19745 | struct dwarf2_cu *cu = reader->cu; |
| 19746 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 19747 | = cu->per_cu->dwarf2_per_objfile; |
| 19748 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 19749 | const char *objf_name = objfile_name (objfile); |
| 19750 | bfd *abfd = objfile->obfd; |
| 19751 | struct dwarf2_section_info *str_section = &reader->dwo_file->sections.str; |
| 19752 | struct dwarf2_section_info *str_offsets_section = |
| 19753 | &reader->dwo_file->sections.str_offsets; |
| 19754 | const gdb_byte *info_ptr; |
| 19755 | ULONGEST str_offset; |
| 19756 | static const char form_name[] = "DW_FORM_GNU_str_index"; |
| 19757 | |
| 19758 | dwarf2_read_section (objfile, str_section); |
| 19759 | dwarf2_read_section (objfile, str_offsets_section); |
| 19760 | if (str_section->buffer == NULL) |
| 19761 | error (_("%s used without .debug_str.dwo section" |
| 19762 | " in CU at offset 0x%x [in module %s]"), |
| 19763 | form_name, to_underlying (cu->header.sect_off), objf_name); |
| 19764 | if (str_offsets_section->buffer == NULL) |
| 19765 | error (_("%s used without .debug_str_offsets.dwo section" |
| 19766 | " in CU at offset 0x%x [in module %s]"), |
| 19767 | form_name, to_underlying (cu->header.sect_off), objf_name); |
| 19768 | if (str_index * cu->header.offset_size >= str_offsets_section->size) |
| 19769 | error (_("%s pointing outside of .debug_str_offsets.dwo" |
| 19770 | " section in CU at offset 0x%x [in module %s]"), |
| 19771 | form_name, to_underlying (cu->header.sect_off), objf_name); |
| 19772 | info_ptr = (str_offsets_section->buffer |
| 19773 | + str_index * cu->header.offset_size); |
| 19774 | if (cu->header.offset_size == 4) |
| 19775 | str_offset = bfd_get_32 (abfd, info_ptr); |
| 19776 | else |
| 19777 | str_offset = bfd_get_64 (abfd, info_ptr); |
| 19778 | if (str_offset >= str_section->size) |
| 19779 | error (_("Offset from %s pointing outside of" |
| 19780 | " .debug_str.dwo section in CU at offset 0x%x [in module %s]"), |
| 19781 | form_name, to_underlying (cu->header.sect_off), objf_name); |
| 19782 | return (const char *) (str_section->buffer + str_offset); |
| 19783 | } |
| 19784 | |
| 19785 | /* Return the length of an LEB128 number in BUF. */ |
| 19786 | |
| 19787 | static int |
| 19788 | leb128_size (const gdb_byte *buf) |
| 19789 | { |
| 19790 | const gdb_byte *begin = buf; |
| 19791 | gdb_byte byte; |
| 19792 | |
| 19793 | while (1) |
| 19794 | { |
| 19795 | byte = *buf++; |
| 19796 | if ((byte & 128) == 0) |
| 19797 | return buf - begin; |
| 19798 | } |
| 19799 | } |
| 19800 | |
| 19801 | static void |
| 19802 | set_cu_language (unsigned int lang, struct dwarf2_cu *cu) |
| 19803 | { |
| 19804 | switch (lang) |
| 19805 | { |
| 19806 | case DW_LANG_C89: |
| 19807 | case DW_LANG_C99: |
| 19808 | case DW_LANG_C11: |
| 19809 | case DW_LANG_C: |
| 19810 | case DW_LANG_UPC: |
| 19811 | cu->language = language_c; |
| 19812 | break; |
| 19813 | case DW_LANG_Java: |
| 19814 | case DW_LANG_C_plus_plus: |
| 19815 | case DW_LANG_C_plus_plus_11: |
| 19816 | case DW_LANG_C_plus_plus_14: |
| 19817 | cu->language = language_cplus; |
| 19818 | break; |
| 19819 | case DW_LANG_D: |
| 19820 | cu->language = language_d; |
| 19821 | break; |
| 19822 | case DW_LANG_Fortran77: |
| 19823 | case DW_LANG_Fortran90: |
| 19824 | case DW_LANG_Fortran95: |
| 19825 | case DW_LANG_Fortran03: |
| 19826 | case DW_LANG_Fortran08: |
| 19827 | cu->language = language_fortran; |
| 19828 | break; |
| 19829 | case DW_LANG_Go: |
| 19830 | cu->language = language_go; |
| 19831 | break; |
| 19832 | case DW_LANG_Mips_Assembler: |
| 19833 | cu->language = language_asm; |
| 19834 | break; |
| 19835 | case DW_LANG_Ada83: |
| 19836 | case DW_LANG_Ada95: |
| 19837 | cu->language = language_ada; |
| 19838 | break; |
| 19839 | case DW_LANG_Modula2: |
| 19840 | cu->language = language_m2; |
| 19841 | break; |
| 19842 | case DW_LANG_Pascal83: |
| 19843 | cu->language = language_pascal; |
| 19844 | break; |
| 19845 | case DW_LANG_ObjC: |
| 19846 | cu->language = language_objc; |
| 19847 | break; |
| 19848 | case DW_LANG_Rust: |
| 19849 | case DW_LANG_Rust_old: |
| 19850 | cu->language = language_rust; |
| 19851 | break; |
| 19852 | case DW_LANG_Cobol74: |
| 19853 | case DW_LANG_Cobol85: |
| 19854 | default: |
| 19855 | cu->language = language_minimal; |
| 19856 | break; |
| 19857 | } |
| 19858 | cu->language_defn = language_def (cu->language); |
| 19859 | } |
| 19860 | |
| 19861 | /* Return the named attribute or NULL if not there. */ |
| 19862 | |
| 19863 | static struct attribute * |
| 19864 | dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) |
| 19865 | { |
| 19866 | for (;;) |
| 19867 | { |
| 19868 | unsigned int i; |
| 19869 | struct attribute *spec = NULL; |
| 19870 | |
| 19871 | for (i = 0; i < die->num_attrs; ++i) |
| 19872 | { |
| 19873 | if (die->attrs[i].name == name) |
| 19874 | return &die->attrs[i]; |
| 19875 | if (die->attrs[i].name == DW_AT_specification |
| 19876 | || die->attrs[i].name == DW_AT_abstract_origin) |
| 19877 | spec = &die->attrs[i]; |
| 19878 | } |
| 19879 | |
| 19880 | if (!spec) |
| 19881 | break; |
| 19882 | |
| 19883 | die = follow_die_ref (die, spec, &cu); |
| 19884 | } |
| 19885 | |
| 19886 | return NULL; |
| 19887 | } |
| 19888 | |
| 19889 | /* Return the named attribute or NULL if not there, |
| 19890 | but do not follow DW_AT_specification, etc. |
| 19891 | This is for use in contexts where we're reading .debug_types dies. |
| 19892 | Following DW_AT_specification, DW_AT_abstract_origin will take us |
| 19893 | back up the chain, and we want to go down. */ |
| 19894 | |
| 19895 | static struct attribute * |
| 19896 | dwarf2_attr_no_follow (struct die_info *die, unsigned int name) |
| 19897 | { |
| 19898 | unsigned int i; |
| 19899 | |
| 19900 | for (i = 0; i < die->num_attrs; ++i) |
| 19901 | if (die->attrs[i].name == name) |
| 19902 | return &die->attrs[i]; |
| 19903 | |
| 19904 | return NULL; |
| 19905 | } |
| 19906 | |
| 19907 | /* Return the string associated with a string-typed attribute, or NULL if it |
| 19908 | is either not found or is of an incorrect type. */ |
| 19909 | |
| 19910 | static const char * |
| 19911 | dwarf2_string_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) |
| 19912 | { |
| 19913 | struct attribute *attr; |
| 19914 | const char *str = NULL; |
| 19915 | |
| 19916 | attr = dwarf2_attr (die, name, cu); |
| 19917 | |
| 19918 | if (attr != NULL) |
| 19919 | { |
| 19920 | if (attr->form == DW_FORM_strp || attr->form == DW_FORM_line_strp |
| 19921 | || attr->form == DW_FORM_string |
| 19922 | || attr->form == DW_FORM_GNU_str_index |
| 19923 | || attr->form == DW_FORM_GNU_strp_alt) |
| 19924 | str = DW_STRING (attr); |
| 19925 | else |
| 19926 | complaint (&symfile_complaints, |
| 19927 | _("string type expected for attribute %s for " |
| 19928 | "DIE at 0x%x in module %s"), |
| 19929 | dwarf_attr_name (name), to_underlying (die->sect_off), |
| 19930 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
| 19931 | } |
| 19932 | |
| 19933 | return str; |
| 19934 | } |
| 19935 | |
| 19936 | /* Return non-zero iff the attribute NAME is defined for the given DIE, |
| 19937 | and holds a non-zero value. This function should only be used for |
| 19938 | DW_FORM_flag or DW_FORM_flag_present attributes. */ |
| 19939 | |
| 19940 | static int |
| 19941 | dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu) |
| 19942 | { |
| 19943 | struct attribute *attr = dwarf2_attr (die, name, cu); |
| 19944 | |
| 19945 | return (attr && DW_UNSND (attr)); |
| 19946 | } |
| 19947 | |
| 19948 | static int |
| 19949 | die_is_declaration (struct die_info *die, struct dwarf2_cu *cu) |
| 19950 | { |
| 19951 | /* A DIE is a declaration if it has a DW_AT_declaration attribute |
| 19952 | which value is non-zero. However, we have to be careful with |
| 19953 | DIEs having a DW_AT_specification attribute, because dwarf2_attr() |
| 19954 | (via dwarf2_flag_true_p) follows this attribute. So we may |
| 19955 | end up accidently finding a declaration attribute that belongs |
| 19956 | to a different DIE referenced by the specification attribute, |
| 19957 | even though the given DIE does not have a declaration attribute. */ |
| 19958 | return (dwarf2_flag_true_p (die, DW_AT_declaration, cu) |
| 19959 | && dwarf2_attr (die, DW_AT_specification, cu) == NULL); |
| 19960 | } |
| 19961 | |
| 19962 | /* Return the die giving the specification for DIE, if there is |
| 19963 | one. *SPEC_CU is the CU containing DIE on input, and the CU |
| 19964 | containing the return value on output. If there is no |
| 19965 | specification, but there is an abstract origin, that is |
| 19966 | returned. */ |
| 19967 | |
| 19968 | static struct die_info * |
| 19969 | die_specification (struct die_info *die, struct dwarf2_cu **spec_cu) |
| 19970 | { |
| 19971 | struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification, |
| 19972 | *spec_cu); |
| 19973 | |
| 19974 | if (spec_attr == NULL) |
| 19975 | spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu); |
| 19976 | |
| 19977 | if (spec_attr == NULL) |
| 19978 | return NULL; |
| 19979 | else |
| 19980 | return follow_die_ref (die, spec_attr, spec_cu); |
| 19981 | } |
| 19982 | |
| 19983 | /* Stub for free_line_header to match void * callback types. */ |
| 19984 | |
| 19985 | static void |
| 19986 | free_line_header_voidp (void *arg) |
| 19987 | { |
| 19988 | struct line_header *lh = (struct line_header *) arg; |
| 19989 | |
| 19990 | delete lh; |
| 19991 | } |
| 19992 | |
| 19993 | void |
| 19994 | line_header::add_include_dir (const char *include_dir) |
| 19995 | { |
| 19996 | if (dwarf_line_debug >= 2) |
| 19997 | fprintf_unfiltered (gdb_stdlog, "Adding dir %zu: %s\n", |
| 19998 | include_dirs.size () + 1, include_dir); |
| 19999 | |
| 20000 | include_dirs.push_back (include_dir); |
| 20001 | } |
| 20002 | |
| 20003 | void |
| 20004 | line_header::add_file_name (const char *name, |
| 20005 | dir_index d_index, |
| 20006 | unsigned int mod_time, |
| 20007 | unsigned int length) |
| 20008 | { |
| 20009 | if (dwarf_line_debug >= 2) |
| 20010 | fprintf_unfiltered (gdb_stdlog, "Adding file %u: %s\n", |
| 20011 | (unsigned) file_names.size () + 1, name); |
| 20012 | |
| 20013 | file_names.emplace_back (name, d_index, mod_time, length); |
| 20014 | } |
| 20015 | |
| 20016 | /* A convenience function to find the proper .debug_line section for a CU. */ |
| 20017 | |
| 20018 | static struct dwarf2_section_info * |
| 20019 | get_debug_line_section (struct dwarf2_cu *cu) |
| 20020 | { |
| 20021 | struct dwarf2_section_info *section; |
| 20022 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 20023 | = cu->per_cu->dwarf2_per_objfile; |
| 20024 | |
| 20025 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the |
| 20026 | DWO file. */ |
| 20027 | if (cu->dwo_unit && cu->per_cu->is_debug_types) |
| 20028 | section = &cu->dwo_unit->dwo_file->sections.line; |
| 20029 | else if (cu->per_cu->is_dwz) |
| 20030 | { |
| 20031 | struct dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
| 20032 | |
| 20033 | section = &dwz->line; |
| 20034 | } |
| 20035 | else |
| 20036 | section = &dwarf2_per_objfile->line; |
| 20037 | |
| 20038 | return section; |
| 20039 | } |
| 20040 | |
| 20041 | /* Read directory or file name entry format, starting with byte of |
| 20042 | format count entries, ULEB128 pairs of entry formats, ULEB128 of |
| 20043 | entries count and the entries themselves in the described entry |
| 20044 | format. */ |
| 20045 | |
| 20046 | static void |
| 20047 | read_formatted_entries (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 20048 | bfd *abfd, const gdb_byte **bufp, |
| 20049 | struct line_header *lh, |
| 20050 | const struct comp_unit_head *cu_header, |
| 20051 | void (*callback) (struct line_header *lh, |
| 20052 | const char *name, |
| 20053 | dir_index d_index, |
| 20054 | unsigned int mod_time, |
| 20055 | unsigned int length)) |
| 20056 | { |
| 20057 | gdb_byte format_count, formati; |
| 20058 | ULONGEST data_count, datai; |
| 20059 | const gdb_byte *buf = *bufp; |
| 20060 | const gdb_byte *format_header_data; |
| 20061 | unsigned int bytes_read; |
| 20062 | |
| 20063 | format_count = read_1_byte (abfd, buf); |
| 20064 | buf += 1; |
| 20065 | format_header_data = buf; |
| 20066 | for (formati = 0; formati < format_count; formati++) |
| 20067 | { |
| 20068 | read_unsigned_leb128 (abfd, buf, &bytes_read); |
| 20069 | buf += bytes_read; |
| 20070 | read_unsigned_leb128 (abfd, buf, &bytes_read); |
| 20071 | buf += bytes_read; |
| 20072 | } |
| 20073 | |
| 20074 | data_count = read_unsigned_leb128 (abfd, buf, &bytes_read); |
| 20075 | buf += bytes_read; |
| 20076 | for (datai = 0; datai < data_count; datai++) |
| 20077 | { |
| 20078 | const gdb_byte *format = format_header_data; |
| 20079 | struct file_entry fe; |
| 20080 | |
| 20081 | for (formati = 0; formati < format_count; formati++) |
| 20082 | { |
| 20083 | ULONGEST content_type = read_unsigned_leb128 (abfd, format, &bytes_read); |
| 20084 | format += bytes_read; |
| 20085 | |
| 20086 | ULONGEST form = read_unsigned_leb128 (abfd, format, &bytes_read); |
| 20087 | format += bytes_read; |
| 20088 | |
| 20089 | gdb::optional<const char *> string; |
| 20090 | gdb::optional<unsigned int> uint; |
| 20091 | |
| 20092 | switch (form) |
| 20093 | { |
| 20094 | case DW_FORM_string: |
| 20095 | string.emplace (read_direct_string (abfd, buf, &bytes_read)); |
| 20096 | buf += bytes_read; |
| 20097 | break; |
| 20098 | |
| 20099 | case DW_FORM_line_strp: |
| 20100 | string.emplace (read_indirect_line_string (dwarf2_per_objfile, |
| 20101 | abfd, buf, |
| 20102 | cu_header, |
| 20103 | &bytes_read)); |
| 20104 | buf += bytes_read; |
| 20105 | break; |
| 20106 | |
| 20107 | case DW_FORM_data1: |
| 20108 | uint.emplace (read_1_byte (abfd, buf)); |
| 20109 | buf += 1; |
| 20110 | break; |
| 20111 | |
| 20112 | case DW_FORM_data2: |
| 20113 | uint.emplace (read_2_bytes (abfd, buf)); |
| 20114 | buf += 2; |
| 20115 | break; |
| 20116 | |
| 20117 | case DW_FORM_data4: |
| 20118 | uint.emplace (read_4_bytes (abfd, buf)); |
| 20119 | buf += 4; |
| 20120 | break; |
| 20121 | |
| 20122 | case DW_FORM_data8: |
| 20123 | uint.emplace (read_8_bytes (abfd, buf)); |
| 20124 | buf += 8; |
| 20125 | break; |
| 20126 | |
| 20127 | case DW_FORM_udata: |
| 20128 | uint.emplace (read_unsigned_leb128 (abfd, buf, &bytes_read)); |
| 20129 | buf += bytes_read; |
| 20130 | break; |
| 20131 | |
| 20132 | case DW_FORM_block: |
| 20133 | /* It is valid only for DW_LNCT_timestamp which is ignored by |
| 20134 | current GDB. */ |
| 20135 | break; |
| 20136 | } |
| 20137 | |
| 20138 | switch (content_type) |
| 20139 | { |
| 20140 | case DW_LNCT_path: |
| 20141 | if (string.has_value ()) |
| 20142 | fe.name = *string; |
| 20143 | break; |
| 20144 | case DW_LNCT_directory_index: |
| 20145 | if (uint.has_value ()) |
| 20146 | fe.d_index = (dir_index) *uint; |
| 20147 | break; |
| 20148 | case DW_LNCT_timestamp: |
| 20149 | if (uint.has_value ()) |
| 20150 | fe.mod_time = *uint; |
| 20151 | break; |
| 20152 | case DW_LNCT_size: |
| 20153 | if (uint.has_value ()) |
| 20154 | fe.length = *uint; |
| 20155 | break; |
| 20156 | case DW_LNCT_MD5: |
| 20157 | break; |
| 20158 | default: |
| 20159 | complaint (&symfile_complaints, |
| 20160 | _("Unknown format content type %s"), |
| 20161 | pulongest (content_type)); |
| 20162 | } |
| 20163 | } |
| 20164 | |
| 20165 | callback (lh, fe.name, fe.d_index, fe.mod_time, fe.length); |
| 20166 | } |
| 20167 | |
| 20168 | *bufp = buf; |
| 20169 | } |
| 20170 | |
| 20171 | /* Read the statement program header starting at OFFSET in |
| 20172 | .debug_line, or .debug_line.dwo. Return a pointer |
| 20173 | to a struct line_header, allocated using xmalloc. |
| 20174 | Returns NULL if there is a problem reading the header, e.g., if it |
| 20175 | has a version we don't understand. |
| 20176 | |
| 20177 | NOTE: the strings in the include directory and file name tables of |
| 20178 | the returned object point into the dwarf line section buffer, |
| 20179 | and must not be freed. */ |
| 20180 | |
| 20181 | static line_header_up |
| 20182 | dwarf_decode_line_header (sect_offset sect_off, struct dwarf2_cu *cu) |
| 20183 | { |
| 20184 | const gdb_byte *line_ptr; |
| 20185 | unsigned int bytes_read, offset_size; |
| 20186 | int i; |
| 20187 | const char *cur_dir, *cur_file; |
| 20188 | struct dwarf2_section_info *section; |
| 20189 | bfd *abfd; |
| 20190 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 20191 | = cu->per_cu->dwarf2_per_objfile; |
| 20192 | |
| 20193 | section = get_debug_line_section (cu); |
| 20194 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); |
| 20195 | if (section->buffer == NULL) |
| 20196 | { |
| 20197 | if (cu->dwo_unit && cu->per_cu->is_debug_types) |
| 20198 | complaint (&symfile_complaints, _("missing .debug_line.dwo section")); |
| 20199 | else |
| 20200 | complaint (&symfile_complaints, _("missing .debug_line section")); |
| 20201 | return 0; |
| 20202 | } |
| 20203 | |
| 20204 | /* We can't do this until we know the section is non-empty. |
| 20205 | Only then do we know we have such a section. */ |
| 20206 | abfd = get_section_bfd_owner (section); |
| 20207 | |
| 20208 | /* Make sure that at least there's room for the total_length field. |
| 20209 | That could be 12 bytes long, but we're just going to fudge that. */ |
| 20210 | if (to_underlying (sect_off) + 4 >= section->size) |
| 20211 | { |
| 20212 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
| 20213 | return 0; |
| 20214 | } |
| 20215 | |
| 20216 | line_header_up lh (new line_header ()); |
| 20217 | |
| 20218 | lh->sect_off = sect_off; |
| 20219 | lh->offset_in_dwz = cu->per_cu->is_dwz; |
| 20220 | |
| 20221 | line_ptr = section->buffer + to_underlying (sect_off); |
| 20222 | |
| 20223 | /* Read in the header. */ |
| 20224 | lh->total_length = |
| 20225 | read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header, |
| 20226 | &bytes_read, &offset_size); |
| 20227 | line_ptr += bytes_read; |
| 20228 | if (line_ptr + lh->total_length > (section->buffer + section->size)) |
| 20229 | { |
| 20230 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
| 20231 | return 0; |
| 20232 | } |
| 20233 | lh->statement_program_end = line_ptr + lh->total_length; |
| 20234 | lh->version = read_2_bytes (abfd, line_ptr); |
| 20235 | line_ptr += 2; |
| 20236 | if (lh->version > 5) |
| 20237 | { |
| 20238 | /* This is a version we don't understand. The format could have |
| 20239 | changed in ways we don't handle properly so just punt. */ |
| 20240 | complaint (&symfile_complaints, |
| 20241 | _("unsupported version in .debug_line section")); |
| 20242 | return NULL; |
| 20243 | } |
| 20244 | if (lh->version >= 5) |
| 20245 | { |
| 20246 | gdb_byte segment_selector_size; |
| 20247 | |
| 20248 | /* Skip address size. */ |
| 20249 | read_1_byte (abfd, line_ptr); |
| 20250 | line_ptr += 1; |
| 20251 | |
| 20252 | segment_selector_size = read_1_byte (abfd, line_ptr); |
| 20253 | line_ptr += 1; |
| 20254 | if (segment_selector_size != 0) |
| 20255 | { |
| 20256 | complaint (&symfile_complaints, |
| 20257 | _("unsupported segment selector size %u " |
| 20258 | "in .debug_line section"), |
| 20259 | segment_selector_size); |
| 20260 | return NULL; |
| 20261 | } |
| 20262 | } |
| 20263 | lh->header_length = read_offset_1 (abfd, line_ptr, offset_size); |
| 20264 | line_ptr += offset_size; |
| 20265 | lh->minimum_instruction_length = read_1_byte (abfd, line_ptr); |
| 20266 | line_ptr += 1; |
| 20267 | if (lh->version >= 4) |
| 20268 | { |
| 20269 | lh->maximum_ops_per_instruction = read_1_byte (abfd, line_ptr); |
| 20270 | line_ptr += 1; |
| 20271 | } |
| 20272 | else |
| 20273 | lh->maximum_ops_per_instruction = 1; |
| 20274 | |
| 20275 | if (lh->maximum_ops_per_instruction == 0) |
| 20276 | { |
| 20277 | lh->maximum_ops_per_instruction = 1; |
| 20278 | complaint (&symfile_complaints, |
| 20279 | _("invalid maximum_ops_per_instruction " |
| 20280 | "in `.debug_line' section")); |
| 20281 | } |
| 20282 | |
| 20283 | lh->default_is_stmt = read_1_byte (abfd, line_ptr); |
| 20284 | line_ptr += 1; |
| 20285 | lh->line_base = read_1_signed_byte (abfd, line_ptr); |
| 20286 | line_ptr += 1; |
| 20287 | lh->line_range = read_1_byte (abfd, line_ptr); |
| 20288 | line_ptr += 1; |
| 20289 | lh->opcode_base = read_1_byte (abfd, line_ptr); |
| 20290 | line_ptr += 1; |
| 20291 | lh->standard_opcode_lengths.reset (new unsigned char[lh->opcode_base]); |
| 20292 | |
| 20293 | lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */ |
| 20294 | for (i = 1; i < lh->opcode_base; ++i) |
| 20295 | { |
| 20296 | lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr); |
| 20297 | line_ptr += 1; |
| 20298 | } |
| 20299 | |
| 20300 | if (lh->version >= 5) |
| 20301 | { |
| 20302 | /* Read directory table. */ |
| 20303 | read_formatted_entries (dwarf2_per_objfile, abfd, &line_ptr, lh.get (), |
| 20304 | &cu->header, |
| 20305 | [] (struct line_header *lh, const char *name, |
| 20306 | dir_index d_index, unsigned int mod_time, |
| 20307 | unsigned int length) |
| 20308 | { |
| 20309 | lh->add_include_dir (name); |
| 20310 | }); |
| 20311 | |
| 20312 | /* Read file name table. */ |
| 20313 | read_formatted_entries (dwarf2_per_objfile, abfd, &line_ptr, lh.get (), |
| 20314 | &cu->header, |
| 20315 | [] (struct line_header *lh, const char *name, |
| 20316 | dir_index d_index, unsigned int mod_time, |
| 20317 | unsigned int length) |
| 20318 | { |
| 20319 | lh->add_file_name (name, d_index, mod_time, length); |
| 20320 | }); |
| 20321 | } |
| 20322 | else |
| 20323 | { |
| 20324 | /* Read directory table. */ |
| 20325 | while ((cur_dir = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) |
| 20326 | { |
| 20327 | line_ptr += bytes_read; |
| 20328 | lh->add_include_dir (cur_dir); |
| 20329 | } |
| 20330 | line_ptr += bytes_read; |
| 20331 | |
| 20332 | /* Read file name table. */ |
| 20333 | while ((cur_file = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) |
| 20334 | { |
| 20335 | unsigned int mod_time, length; |
| 20336 | dir_index d_index; |
| 20337 | |
| 20338 | line_ptr += bytes_read; |
| 20339 | d_index = (dir_index) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
| 20340 | line_ptr += bytes_read; |
| 20341 | mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
| 20342 | line_ptr += bytes_read; |
| 20343 | length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
| 20344 | line_ptr += bytes_read; |
| 20345 | |
| 20346 | lh->add_file_name (cur_file, d_index, mod_time, length); |
| 20347 | } |
| 20348 | line_ptr += bytes_read; |
| 20349 | } |
| 20350 | lh->statement_program_start = line_ptr; |
| 20351 | |
| 20352 | if (line_ptr > (section->buffer + section->size)) |
| 20353 | complaint (&symfile_complaints, |
| 20354 | _("line number info header doesn't " |
| 20355 | "fit in `.debug_line' section")); |
| 20356 | |
| 20357 | return lh; |
| 20358 | } |
| 20359 | |
| 20360 | /* Subroutine of dwarf_decode_lines to simplify it. |
| 20361 | Return the file name of the psymtab for included file FILE_INDEX |
| 20362 | in line header LH of PST. |
| 20363 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. |
| 20364 | If space for the result is malloc'd, *NAME_HOLDER will be set. |
| 20365 | Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */ |
| 20366 | |
| 20367 | static const char * |
| 20368 | psymtab_include_file_name (const struct line_header *lh, int file_index, |
| 20369 | const struct partial_symtab *pst, |
| 20370 | const char *comp_dir, |
| 20371 | gdb::unique_xmalloc_ptr<char> *name_holder) |
| 20372 | { |
| 20373 | const file_entry &fe = lh->file_names[file_index]; |
| 20374 | const char *include_name = fe.name; |
| 20375 | const char *include_name_to_compare = include_name; |
| 20376 | const char *pst_filename; |
| 20377 | int file_is_pst; |
| 20378 | |
| 20379 | const char *dir_name = fe.include_dir (lh); |
| 20380 | |
| 20381 | gdb::unique_xmalloc_ptr<char> hold_compare; |
| 20382 | if (!IS_ABSOLUTE_PATH (include_name) |
| 20383 | && (dir_name != NULL || comp_dir != NULL)) |
| 20384 | { |
| 20385 | /* Avoid creating a duplicate psymtab for PST. |
| 20386 | We do this by comparing INCLUDE_NAME and PST_FILENAME. |
| 20387 | Before we do the comparison, however, we need to account |
| 20388 | for DIR_NAME and COMP_DIR. |
| 20389 | First prepend dir_name (if non-NULL). If we still don't |
| 20390 | have an absolute path prepend comp_dir (if non-NULL). |
| 20391 | However, the directory we record in the include-file's |
| 20392 | psymtab does not contain COMP_DIR (to match the |
| 20393 | corresponding symtab(s)). |
| 20394 | |
| 20395 | Example: |
| 20396 | |
| 20397 | bash$ cd /tmp |
| 20398 | bash$ gcc -g ./hello.c |
| 20399 | include_name = "hello.c" |
| 20400 | dir_name = "." |
| 20401 | DW_AT_comp_dir = comp_dir = "/tmp" |
| 20402 | DW_AT_name = "./hello.c" |
| 20403 | |
| 20404 | */ |
| 20405 | |
| 20406 | if (dir_name != NULL) |
| 20407 | { |
| 20408 | name_holder->reset (concat (dir_name, SLASH_STRING, |
| 20409 | include_name, (char *) NULL)); |
| 20410 | include_name = name_holder->get (); |
| 20411 | include_name_to_compare = include_name; |
| 20412 | } |
| 20413 | if (!IS_ABSOLUTE_PATH (include_name) && comp_dir != NULL) |
| 20414 | { |
| 20415 | hold_compare.reset (concat (comp_dir, SLASH_STRING, |
| 20416 | include_name, (char *) NULL)); |
| 20417 | include_name_to_compare = hold_compare.get (); |
| 20418 | } |
| 20419 | } |
| 20420 | |
| 20421 | pst_filename = pst->filename; |
| 20422 | gdb::unique_xmalloc_ptr<char> copied_name; |
| 20423 | if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL) |
| 20424 | { |
| 20425 | copied_name.reset (concat (pst->dirname, SLASH_STRING, |
| 20426 | pst_filename, (char *) NULL)); |
| 20427 | pst_filename = copied_name.get (); |
| 20428 | } |
| 20429 | |
| 20430 | file_is_pst = FILENAME_CMP (include_name_to_compare, pst_filename) == 0; |
| 20431 | |
| 20432 | if (file_is_pst) |
| 20433 | return NULL; |
| 20434 | return include_name; |
| 20435 | } |
| 20436 | |
| 20437 | /* State machine to track the state of the line number program. */ |
| 20438 | |
| 20439 | class lnp_state_machine |
| 20440 | { |
| 20441 | public: |
| 20442 | /* Initialize a machine state for the start of a line number |
| 20443 | program. */ |
| 20444 | lnp_state_machine (gdbarch *arch, line_header *lh, bool record_lines_p); |
| 20445 | |
| 20446 | file_entry *current_file () |
| 20447 | { |
| 20448 | /* lh->file_names is 0-based, but the file name numbers in the |
| 20449 | statement program are 1-based. */ |
| 20450 | return m_line_header->file_name_at (m_file); |
| 20451 | } |
| 20452 | |
| 20453 | /* Record the line in the state machine. END_SEQUENCE is true if |
| 20454 | we're processing the end of a sequence. */ |
| 20455 | void record_line (bool end_sequence); |
| 20456 | |
| 20457 | /* Check address and if invalid nop-out the rest of the lines in this |
| 20458 | sequence. */ |
| 20459 | void check_line_address (struct dwarf2_cu *cu, |
| 20460 | const gdb_byte *line_ptr, |
| 20461 | CORE_ADDR lowpc, CORE_ADDR address); |
| 20462 | |
| 20463 | void handle_set_discriminator (unsigned int discriminator) |
| 20464 | { |
| 20465 | m_discriminator = discriminator; |
| 20466 | m_line_has_non_zero_discriminator |= discriminator != 0; |
| 20467 | } |
| 20468 | |
| 20469 | /* Handle DW_LNE_set_address. */ |
| 20470 | void handle_set_address (CORE_ADDR baseaddr, CORE_ADDR address) |
| 20471 | { |
| 20472 | m_op_index = 0; |
| 20473 | address += baseaddr; |
| 20474 | m_address = gdbarch_adjust_dwarf2_line (m_gdbarch, address, false); |
| 20475 | } |
| 20476 | |
| 20477 | /* Handle DW_LNS_advance_pc. */ |
| 20478 | void handle_advance_pc (CORE_ADDR adjust); |
| 20479 | |
| 20480 | /* Handle a special opcode. */ |
| 20481 | void handle_special_opcode (unsigned char op_code); |
| 20482 | |
| 20483 | /* Handle DW_LNS_advance_line. */ |
| 20484 | void handle_advance_line (int line_delta) |
| 20485 | { |
| 20486 | advance_line (line_delta); |
| 20487 | } |
| 20488 | |
| 20489 | /* Handle DW_LNS_set_file. */ |
| 20490 | void handle_set_file (file_name_index file); |
| 20491 | |
| 20492 | /* Handle DW_LNS_negate_stmt. */ |
| 20493 | void handle_negate_stmt () |
| 20494 | { |
| 20495 | m_is_stmt = !m_is_stmt; |
| 20496 | } |
| 20497 | |
| 20498 | /* Handle DW_LNS_const_add_pc. */ |
| 20499 | void handle_const_add_pc (); |
| 20500 | |
| 20501 | /* Handle DW_LNS_fixed_advance_pc. */ |
| 20502 | void handle_fixed_advance_pc (CORE_ADDR addr_adj) |
| 20503 | { |
| 20504 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); |
| 20505 | m_op_index = 0; |
| 20506 | } |
| 20507 | |
| 20508 | /* Handle DW_LNS_copy. */ |
| 20509 | void handle_copy () |
| 20510 | { |
| 20511 | record_line (false); |
| 20512 | m_discriminator = 0; |
| 20513 | } |
| 20514 | |
| 20515 | /* Handle DW_LNE_end_sequence. */ |
| 20516 | void handle_end_sequence () |
| 20517 | { |
| 20518 | m_record_line_callback = ::record_line; |
| 20519 | } |
| 20520 | |
| 20521 | private: |
| 20522 | /* Advance the line by LINE_DELTA. */ |
| 20523 | void advance_line (int line_delta) |
| 20524 | { |
| 20525 | m_line += line_delta; |
| 20526 | |
| 20527 | if (line_delta != 0) |
| 20528 | m_line_has_non_zero_discriminator = m_discriminator != 0; |
| 20529 | } |
| 20530 | |
| 20531 | gdbarch *m_gdbarch; |
| 20532 | |
| 20533 | /* True if we're recording lines. |
| 20534 | Otherwise we're building partial symtabs and are just interested in |
| 20535 | finding include files mentioned by the line number program. */ |
| 20536 | bool m_record_lines_p; |
| 20537 | |
| 20538 | /* The line number header. */ |
| 20539 | line_header *m_line_header; |
| 20540 | |
| 20541 | /* These are part of the standard DWARF line number state machine, |
| 20542 | and initialized according to the DWARF spec. */ |
| 20543 | |
| 20544 | unsigned char m_op_index = 0; |
| 20545 | /* The line table index (1-based) of the current file. */ |
| 20546 | file_name_index m_file = (file_name_index) 1; |
| 20547 | unsigned int m_line = 1; |
| 20548 | |
| 20549 | /* These are initialized in the constructor. */ |
| 20550 | |
| 20551 | CORE_ADDR m_address; |
| 20552 | bool m_is_stmt; |
| 20553 | unsigned int m_discriminator; |
| 20554 | |
| 20555 | /* Additional bits of state we need to track. */ |
| 20556 | |
| 20557 | /* The last file that we called dwarf2_start_subfile for. |
| 20558 | This is only used for TLLs. */ |
| 20559 | unsigned int m_last_file = 0; |
| 20560 | /* The last file a line number was recorded for. */ |
| 20561 | struct subfile *m_last_subfile = NULL; |
| 20562 | |
| 20563 | /* The function to call to record a line. */ |
| 20564 | record_line_ftype *m_record_line_callback = NULL; |
| 20565 | |
| 20566 | /* The last line number that was recorded, used to coalesce |
| 20567 | consecutive entries for the same line. This can happen, for |
| 20568 | example, when discriminators are present. PR 17276. */ |
| 20569 | unsigned int m_last_line = 0; |
| 20570 | bool m_line_has_non_zero_discriminator = false; |
| 20571 | }; |
| 20572 | |
| 20573 | void |
| 20574 | lnp_state_machine::handle_advance_pc (CORE_ADDR adjust) |
| 20575 | { |
| 20576 | CORE_ADDR addr_adj = (((m_op_index + adjust) |
| 20577 | / m_line_header->maximum_ops_per_instruction) |
| 20578 | * m_line_header->minimum_instruction_length); |
| 20579 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); |
| 20580 | m_op_index = ((m_op_index + adjust) |
| 20581 | % m_line_header->maximum_ops_per_instruction); |
| 20582 | } |
| 20583 | |
| 20584 | void |
| 20585 | lnp_state_machine::handle_special_opcode (unsigned char op_code) |
| 20586 | { |
| 20587 | unsigned char adj_opcode = op_code - m_line_header->opcode_base; |
| 20588 | CORE_ADDR addr_adj = (((m_op_index |
| 20589 | + (adj_opcode / m_line_header->line_range)) |
| 20590 | / m_line_header->maximum_ops_per_instruction) |
| 20591 | * m_line_header->minimum_instruction_length); |
| 20592 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); |
| 20593 | m_op_index = ((m_op_index + (adj_opcode / m_line_header->line_range)) |
| 20594 | % m_line_header->maximum_ops_per_instruction); |
| 20595 | |
| 20596 | int line_delta = (m_line_header->line_base |
| 20597 | + (adj_opcode % m_line_header->line_range)); |
| 20598 | advance_line (line_delta); |
| 20599 | record_line (false); |
| 20600 | m_discriminator = 0; |
| 20601 | } |
| 20602 | |
| 20603 | void |
| 20604 | lnp_state_machine::handle_set_file (file_name_index file) |
| 20605 | { |
| 20606 | m_file = file; |
| 20607 | |
| 20608 | const file_entry *fe = current_file (); |
| 20609 | if (fe == NULL) |
| 20610 | dwarf2_debug_line_missing_file_complaint (); |
| 20611 | else if (m_record_lines_p) |
| 20612 | { |
| 20613 | const char *dir = fe->include_dir (m_line_header); |
| 20614 | |
| 20615 | m_last_subfile = current_subfile; |
| 20616 | m_line_has_non_zero_discriminator = m_discriminator != 0; |
| 20617 | dwarf2_start_subfile (fe->name, dir); |
| 20618 | } |
| 20619 | } |
| 20620 | |
| 20621 | void |
| 20622 | lnp_state_machine::handle_const_add_pc () |
| 20623 | { |
| 20624 | CORE_ADDR adjust |
| 20625 | = (255 - m_line_header->opcode_base) / m_line_header->line_range; |
| 20626 | |
| 20627 | CORE_ADDR addr_adj |
| 20628 | = (((m_op_index + adjust) |
| 20629 | / m_line_header->maximum_ops_per_instruction) |
| 20630 | * m_line_header->minimum_instruction_length); |
| 20631 | |
| 20632 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); |
| 20633 | m_op_index = ((m_op_index + adjust) |
| 20634 | % m_line_header->maximum_ops_per_instruction); |
| 20635 | } |
| 20636 | |
| 20637 | /* Ignore this record_line request. */ |
| 20638 | |
| 20639 | static void |
| 20640 | noop_record_line (struct subfile *subfile, int line, CORE_ADDR pc) |
| 20641 | { |
| 20642 | return; |
| 20643 | } |
| 20644 | |
| 20645 | /* Return non-zero if we should add LINE to the line number table. |
| 20646 | LINE is the line to add, LAST_LINE is the last line that was added, |
| 20647 | LAST_SUBFILE is the subfile for LAST_LINE. |
| 20648 | LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever |
| 20649 | had a non-zero discriminator. |
| 20650 | |
| 20651 | We have to be careful in the presence of discriminators. |
| 20652 | E.g., for this line: |
| 20653 | |
| 20654 | for (i = 0; i < 100000; i++); |
| 20655 | |
| 20656 | clang can emit four line number entries for that one line, |
| 20657 | each with a different discriminator. |
| 20658 | See gdb.dwarf2/dw2-single-line-discriminators.exp for an example. |
| 20659 | |
| 20660 | However, we want gdb to coalesce all four entries into one. |
| 20661 | Otherwise the user could stepi into the middle of the line and |
| 20662 | gdb would get confused about whether the pc really was in the |
| 20663 | middle of the line. |
| 20664 | |
| 20665 | Things are further complicated by the fact that two consecutive |
| 20666 | line number entries for the same line is a heuristic used by gcc |
| 20667 | to denote the end of the prologue. So we can't just discard duplicate |
| 20668 | entries, we have to be selective about it. The heuristic we use is |
| 20669 | that we only collapse consecutive entries for the same line if at least |
| 20670 | one of those entries has a non-zero discriminator. PR 17276. |
| 20671 | |
| 20672 | Note: Addresses in the line number state machine can never go backwards |
| 20673 | within one sequence, thus this coalescing is ok. */ |
| 20674 | |
| 20675 | static int |
| 20676 | dwarf_record_line_p (unsigned int line, unsigned int last_line, |
| 20677 | int line_has_non_zero_discriminator, |
| 20678 | struct subfile *last_subfile) |
| 20679 | { |
| 20680 | if (current_subfile != last_subfile) |
| 20681 | return 1; |
| 20682 | if (line != last_line) |
| 20683 | return 1; |
| 20684 | /* Same line for the same file that we've seen already. |
| 20685 | As a last check, for pr 17276, only record the line if the line |
| 20686 | has never had a non-zero discriminator. */ |
| 20687 | if (!line_has_non_zero_discriminator) |
| 20688 | return 1; |
| 20689 | return 0; |
| 20690 | } |
| 20691 | |
| 20692 | /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS |
| 20693 | in the line table of subfile SUBFILE. */ |
| 20694 | |
| 20695 | static void |
| 20696 | dwarf_record_line_1 (struct gdbarch *gdbarch, struct subfile *subfile, |
| 20697 | unsigned int line, CORE_ADDR address, |
| 20698 | record_line_ftype p_record_line) |
| 20699 | { |
| 20700 | CORE_ADDR addr = gdbarch_addr_bits_remove (gdbarch, address); |
| 20701 | |
| 20702 | if (dwarf_line_debug) |
| 20703 | { |
| 20704 | fprintf_unfiltered (gdb_stdlog, |
| 20705 | "Recording line %u, file %s, address %s\n", |
| 20706 | line, lbasename (subfile->name), |
| 20707 | paddress (gdbarch, address)); |
| 20708 | } |
| 20709 | |
| 20710 | (*p_record_line) (subfile, line, addr); |
| 20711 | } |
| 20712 | |
| 20713 | /* Subroutine of dwarf_decode_lines_1 to simplify it. |
| 20714 | Mark the end of a set of line number records. |
| 20715 | The arguments are the same as for dwarf_record_line_1. |
| 20716 | If SUBFILE is NULL the request is ignored. */ |
| 20717 | |
| 20718 | static void |
| 20719 | dwarf_finish_line (struct gdbarch *gdbarch, struct subfile *subfile, |
| 20720 | CORE_ADDR address, record_line_ftype p_record_line) |
| 20721 | { |
| 20722 | if (subfile == NULL) |
| 20723 | return; |
| 20724 | |
| 20725 | if (dwarf_line_debug) |
| 20726 | { |
| 20727 | fprintf_unfiltered (gdb_stdlog, |
| 20728 | "Finishing current line, file %s, address %s\n", |
| 20729 | lbasename (subfile->name), |
| 20730 | paddress (gdbarch, address)); |
| 20731 | } |
| 20732 | |
| 20733 | dwarf_record_line_1 (gdbarch, subfile, 0, address, p_record_line); |
| 20734 | } |
| 20735 | |
| 20736 | void |
| 20737 | lnp_state_machine::record_line (bool end_sequence) |
| 20738 | { |
| 20739 | if (dwarf_line_debug) |
| 20740 | { |
| 20741 | fprintf_unfiltered (gdb_stdlog, |
| 20742 | "Processing actual line %u: file %u," |
| 20743 | " address %s, is_stmt %u, discrim %u\n", |
| 20744 | m_line, to_underlying (m_file), |
| 20745 | paddress (m_gdbarch, m_address), |
| 20746 | m_is_stmt, m_discriminator); |
| 20747 | } |
| 20748 | |
| 20749 | file_entry *fe = current_file (); |
| 20750 | |
| 20751 | if (fe == NULL) |
| 20752 | dwarf2_debug_line_missing_file_complaint (); |
| 20753 | /* For now we ignore lines not starting on an instruction boundary. |
| 20754 | But not when processing end_sequence for compatibility with the |
| 20755 | previous version of the code. */ |
| 20756 | else if (m_op_index == 0 || end_sequence) |
| 20757 | { |
| 20758 | fe->included_p = 1; |
| 20759 | if (m_record_lines_p && m_is_stmt) |
| 20760 | { |
| 20761 | if (m_last_subfile != current_subfile || end_sequence) |
| 20762 | { |
| 20763 | dwarf_finish_line (m_gdbarch, m_last_subfile, |
| 20764 | m_address, m_record_line_callback); |
| 20765 | } |
| 20766 | |
| 20767 | if (!end_sequence) |
| 20768 | { |
| 20769 | if (dwarf_record_line_p (m_line, m_last_line, |
| 20770 | m_line_has_non_zero_discriminator, |
| 20771 | m_last_subfile)) |
| 20772 | { |
| 20773 | dwarf_record_line_1 (m_gdbarch, current_subfile, |
| 20774 | m_line, m_address, |
| 20775 | m_record_line_callback); |
| 20776 | } |
| 20777 | m_last_subfile = current_subfile; |
| 20778 | m_last_line = m_line; |
| 20779 | } |
| 20780 | } |
| 20781 | } |
| 20782 | } |
| 20783 | |
| 20784 | lnp_state_machine::lnp_state_machine (gdbarch *arch, line_header *lh, |
| 20785 | bool record_lines_p) |
| 20786 | { |
| 20787 | m_gdbarch = arch; |
| 20788 | m_record_lines_p = record_lines_p; |
| 20789 | m_line_header = lh; |
| 20790 | |
| 20791 | m_record_line_callback = ::record_line; |
| 20792 | |
| 20793 | /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there |
| 20794 | was a line entry for it so that the backend has a chance to adjust it |
| 20795 | and also record it in case it needs it. This is currently used by MIPS |
| 20796 | code, cf. `mips_adjust_dwarf2_line'. */ |
| 20797 | m_address = gdbarch_adjust_dwarf2_line (arch, 0, 0); |
| 20798 | m_is_stmt = lh->default_is_stmt; |
| 20799 | m_discriminator = 0; |
| 20800 | } |
| 20801 | |
| 20802 | void |
| 20803 | lnp_state_machine::check_line_address (struct dwarf2_cu *cu, |
| 20804 | const gdb_byte *line_ptr, |
| 20805 | CORE_ADDR lowpc, CORE_ADDR address) |
| 20806 | { |
| 20807 | /* If address < lowpc then it's not a usable value, it's outside the |
| 20808 | pc range of the CU. However, we restrict the test to only address |
| 20809 | values of zero to preserve GDB's previous behaviour which is to |
| 20810 | handle the specific case of a function being GC'd by the linker. */ |
| 20811 | |
| 20812 | if (address == 0 && address < lowpc) |
| 20813 | { |
| 20814 | /* This line table is for a function which has been |
| 20815 | GCd by the linker. Ignore it. PR gdb/12528 */ |
| 20816 | |
| 20817 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 20818 | long line_offset = line_ptr - get_debug_line_section (cu)->buffer; |
| 20819 | |
| 20820 | complaint (&symfile_complaints, |
| 20821 | _(".debug_line address at offset 0x%lx is 0 [in module %s]"), |
| 20822 | line_offset, objfile_name (objfile)); |
| 20823 | m_record_line_callback = noop_record_line; |
| 20824 | /* Note: record_line_callback is left as noop_record_line until |
| 20825 | we see DW_LNE_end_sequence. */ |
| 20826 | } |
| 20827 | } |
| 20828 | |
| 20829 | /* Subroutine of dwarf_decode_lines to simplify it. |
| 20830 | Process the line number information in LH. |
| 20831 | If DECODE_FOR_PST_P is non-zero, all we do is process the line number |
| 20832 | program in order to set included_p for every referenced header. */ |
| 20833 | |
| 20834 | static void |
| 20835 | dwarf_decode_lines_1 (struct line_header *lh, struct dwarf2_cu *cu, |
| 20836 | const int decode_for_pst_p, CORE_ADDR lowpc) |
| 20837 | { |
| 20838 | const gdb_byte *line_ptr, *extended_end; |
| 20839 | const gdb_byte *line_end; |
| 20840 | unsigned int bytes_read, extended_len; |
| 20841 | unsigned char op_code, extended_op; |
| 20842 | CORE_ADDR baseaddr; |
| 20843 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 20844 | bfd *abfd = objfile->obfd; |
| 20845 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
| 20846 | /* True if we're recording line info (as opposed to building partial |
| 20847 | symtabs and just interested in finding include files mentioned by |
| 20848 | the line number program). */ |
| 20849 | bool record_lines_p = !decode_for_pst_p; |
| 20850 | |
| 20851 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
| 20852 | |
| 20853 | line_ptr = lh->statement_program_start; |
| 20854 | line_end = lh->statement_program_end; |
| 20855 | |
| 20856 | /* Read the statement sequences until there's nothing left. */ |
| 20857 | while (line_ptr < line_end) |
| 20858 | { |
| 20859 | /* The DWARF line number program state machine. Reset the state |
| 20860 | machine at the start of each sequence. */ |
| 20861 | lnp_state_machine state_machine (gdbarch, lh, record_lines_p); |
| 20862 | bool end_sequence = false; |
| 20863 | |
| 20864 | if (record_lines_p) |
| 20865 | { |
| 20866 | /* Start a subfile for the current file of the state |
| 20867 | machine. */ |
| 20868 | const file_entry *fe = state_machine.current_file (); |
| 20869 | |
| 20870 | if (fe != NULL) |
| 20871 | dwarf2_start_subfile (fe->name, fe->include_dir (lh)); |
| 20872 | } |
| 20873 | |
| 20874 | /* Decode the table. */ |
| 20875 | while (line_ptr < line_end && !end_sequence) |
| 20876 | { |
| 20877 | op_code = read_1_byte (abfd, line_ptr); |
| 20878 | line_ptr += 1; |
| 20879 | |
| 20880 | if (op_code >= lh->opcode_base) |
| 20881 | { |
| 20882 | /* Special opcode. */ |
| 20883 | state_machine.handle_special_opcode (op_code); |
| 20884 | } |
| 20885 | else switch (op_code) |
| 20886 | { |
| 20887 | case DW_LNS_extended_op: |
| 20888 | extended_len = read_unsigned_leb128 (abfd, line_ptr, |
| 20889 | &bytes_read); |
| 20890 | line_ptr += bytes_read; |
| 20891 | extended_end = line_ptr + extended_len; |
| 20892 | extended_op = read_1_byte (abfd, line_ptr); |
| 20893 | line_ptr += 1; |
| 20894 | switch (extended_op) |
| 20895 | { |
| 20896 | case DW_LNE_end_sequence: |
| 20897 | state_machine.handle_end_sequence (); |
| 20898 | end_sequence = true; |
| 20899 | break; |
| 20900 | case DW_LNE_set_address: |
| 20901 | { |
| 20902 | CORE_ADDR address |
| 20903 | = read_address (abfd, line_ptr, cu, &bytes_read); |
| 20904 | line_ptr += bytes_read; |
| 20905 | |
| 20906 | state_machine.check_line_address (cu, line_ptr, |
| 20907 | lowpc, address); |
| 20908 | state_machine.handle_set_address (baseaddr, address); |
| 20909 | } |
| 20910 | break; |
| 20911 | case DW_LNE_define_file: |
| 20912 | { |
| 20913 | const char *cur_file; |
| 20914 | unsigned int mod_time, length; |
| 20915 | dir_index dindex; |
| 20916 | |
| 20917 | cur_file = read_direct_string (abfd, line_ptr, |
| 20918 | &bytes_read); |
| 20919 | line_ptr += bytes_read; |
| 20920 | dindex = (dir_index) |
| 20921 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
| 20922 | line_ptr += bytes_read; |
| 20923 | mod_time = |
| 20924 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
| 20925 | line_ptr += bytes_read; |
| 20926 | length = |
| 20927 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
| 20928 | line_ptr += bytes_read; |
| 20929 | lh->add_file_name (cur_file, dindex, mod_time, length); |
| 20930 | } |
| 20931 | break; |
| 20932 | case DW_LNE_set_discriminator: |
| 20933 | { |
| 20934 | /* The discriminator is not interesting to the |
| 20935 | debugger; just ignore it. We still need to |
| 20936 | check its value though: |
| 20937 | if there are consecutive entries for the same |
| 20938 | (non-prologue) line we want to coalesce them. |
| 20939 | PR 17276. */ |
| 20940 | unsigned int discr |
| 20941 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
| 20942 | line_ptr += bytes_read; |
| 20943 | |
| 20944 | state_machine.handle_set_discriminator (discr); |
| 20945 | } |
| 20946 | break; |
| 20947 | default: |
| 20948 | complaint (&symfile_complaints, |
| 20949 | _("mangled .debug_line section")); |
| 20950 | return; |
| 20951 | } |
| 20952 | /* Make sure that we parsed the extended op correctly. If e.g. |
| 20953 | we expected a different address size than the producer used, |
| 20954 | we may have read the wrong number of bytes. */ |
| 20955 | if (line_ptr != extended_end) |
| 20956 | { |
| 20957 | complaint (&symfile_complaints, |
| 20958 | _("mangled .debug_line section")); |
| 20959 | return; |
| 20960 | } |
| 20961 | break; |
| 20962 | case DW_LNS_copy: |
| 20963 | state_machine.handle_copy (); |
| 20964 | break; |
| 20965 | case DW_LNS_advance_pc: |
| 20966 | { |
| 20967 | CORE_ADDR adjust |
| 20968 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
| 20969 | line_ptr += bytes_read; |
| 20970 | |
| 20971 | state_machine.handle_advance_pc (adjust); |
| 20972 | } |
| 20973 | break; |
| 20974 | case DW_LNS_advance_line: |
| 20975 | { |
| 20976 | int line_delta |
| 20977 | = read_signed_leb128 (abfd, line_ptr, &bytes_read); |
| 20978 | line_ptr += bytes_read; |
| 20979 | |
| 20980 | state_machine.handle_advance_line (line_delta); |
| 20981 | } |
| 20982 | break; |
| 20983 | case DW_LNS_set_file: |
| 20984 | { |
| 20985 | file_name_index file |
| 20986 | = (file_name_index) read_unsigned_leb128 (abfd, line_ptr, |
| 20987 | &bytes_read); |
| 20988 | line_ptr += bytes_read; |
| 20989 | |
| 20990 | state_machine.handle_set_file (file); |
| 20991 | } |
| 20992 | break; |
| 20993 | case DW_LNS_set_column: |
| 20994 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
| 20995 | line_ptr += bytes_read; |
| 20996 | break; |
| 20997 | case DW_LNS_negate_stmt: |
| 20998 | state_machine.handle_negate_stmt (); |
| 20999 | break; |
| 21000 | case DW_LNS_set_basic_block: |
| 21001 | break; |
| 21002 | /* Add to the address register of the state machine the |
| 21003 | address increment value corresponding to special opcode |
| 21004 | 255. I.e., this value is scaled by the minimum |
| 21005 | instruction length since special opcode 255 would have |
| 21006 | scaled the increment. */ |
| 21007 | case DW_LNS_const_add_pc: |
| 21008 | state_machine.handle_const_add_pc (); |
| 21009 | break; |
| 21010 | case DW_LNS_fixed_advance_pc: |
| 21011 | { |
| 21012 | CORE_ADDR addr_adj = read_2_bytes (abfd, line_ptr); |
| 21013 | line_ptr += 2; |
| 21014 | |
| 21015 | state_machine.handle_fixed_advance_pc (addr_adj); |
| 21016 | } |
| 21017 | break; |
| 21018 | default: |
| 21019 | { |
| 21020 | /* Unknown standard opcode, ignore it. */ |
| 21021 | int i; |
| 21022 | |
| 21023 | for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++) |
| 21024 | { |
| 21025 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
| 21026 | line_ptr += bytes_read; |
| 21027 | } |
| 21028 | } |
| 21029 | } |
| 21030 | } |
| 21031 | |
| 21032 | if (!end_sequence) |
| 21033 | dwarf2_debug_line_missing_end_sequence_complaint (); |
| 21034 | |
| 21035 | /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer, |
| 21036 | in which case we still finish recording the last line). */ |
| 21037 | state_machine.record_line (true); |
| 21038 | } |
| 21039 | } |
| 21040 | |
| 21041 | /* Decode the Line Number Program (LNP) for the given line_header |
| 21042 | structure and CU. The actual information extracted and the type |
| 21043 | of structures created from the LNP depends on the value of PST. |
| 21044 | |
| 21045 | 1. If PST is NULL, then this procedure uses the data from the program |
| 21046 | to create all necessary symbol tables, and their linetables. |
| 21047 | |
| 21048 | 2. If PST is not NULL, this procedure reads the program to determine |
| 21049 | the list of files included by the unit represented by PST, and |
| 21050 | builds all the associated partial symbol tables. |
| 21051 | |
| 21052 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. |
| 21053 | It is used for relative paths in the line table. |
| 21054 | NOTE: When processing partial symtabs (pst != NULL), |
| 21055 | comp_dir == pst->dirname. |
| 21056 | |
| 21057 | NOTE: It is important that psymtabs have the same file name (via strcmp) |
| 21058 | as the corresponding symtab. Since COMP_DIR is not used in the name of the |
| 21059 | symtab we don't use it in the name of the psymtabs we create. |
| 21060 | E.g. expand_line_sal requires this when finding psymtabs to expand. |
| 21061 | A good testcase for this is mb-inline.exp. |
| 21062 | |
| 21063 | LOWPC is the lowest address in CU (or 0 if not known). |
| 21064 | |
| 21065 | Boolean DECODE_MAPPING specifies we need to fully decode .debug_line |
| 21066 | for its PC<->lines mapping information. Otherwise only the filename |
| 21067 | table is read in. */ |
| 21068 | |
| 21069 | static void |
| 21070 | dwarf_decode_lines (struct line_header *lh, const char *comp_dir, |
| 21071 | struct dwarf2_cu *cu, struct partial_symtab *pst, |
| 21072 | CORE_ADDR lowpc, int decode_mapping) |
| 21073 | { |
| 21074 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 21075 | const int decode_for_pst_p = (pst != NULL); |
| 21076 | |
| 21077 | if (decode_mapping) |
| 21078 | dwarf_decode_lines_1 (lh, cu, decode_for_pst_p, lowpc); |
| 21079 | |
| 21080 | if (decode_for_pst_p) |
| 21081 | { |
| 21082 | int file_index; |
| 21083 | |
| 21084 | /* Now that we're done scanning the Line Header Program, we can |
| 21085 | create the psymtab of each included file. */ |
| 21086 | for (file_index = 0; file_index < lh->file_names.size (); file_index++) |
| 21087 | if (lh->file_names[file_index].included_p == 1) |
| 21088 | { |
| 21089 | gdb::unique_xmalloc_ptr<char> name_holder; |
| 21090 | const char *include_name = |
| 21091 | psymtab_include_file_name (lh, file_index, pst, comp_dir, |
| 21092 | &name_holder); |
| 21093 | if (include_name != NULL) |
| 21094 | dwarf2_create_include_psymtab (include_name, pst, objfile); |
| 21095 | } |
| 21096 | } |
| 21097 | else |
| 21098 | { |
| 21099 | /* Make sure a symtab is created for every file, even files |
| 21100 | which contain only variables (i.e. no code with associated |
| 21101 | line numbers). */ |
| 21102 | struct compunit_symtab *cust = buildsym_compunit_symtab (); |
| 21103 | int i; |
| 21104 | |
| 21105 | for (i = 0; i < lh->file_names.size (); i++) |
| 21106 | { |
| 21107 | file_entry &fe = lh->file_names[i]; |
| 21108 | |
| 21109 | dwarf2_start_subfile (fe.name, fe.include_dir (lh)); |
| 21110 | |
| 21111 | if (current_subfile->symtab == NULL) |
| 21112 | { |
| 21113 | current_subfile->symtab |
| 21114 | = allocate_symtab (cust, current_subfile->name); |
| 21115 | } |
| 21116 | fe.symtab = current_subfile->symtab; |
| 21117 | } |
| 21118 | } |
| 21119 | } |
| 21120 | |
| 21121 | /* Start a subfile for DWARF. FILENAME is the name of the file and |
| 21122 | DIRNAME the name of the source directory which contains FILENAME |
| 21123 | or NULL if not known. |
| 21124 | This routine tries to keep line numbers from identical absolute and |
| 21125 | relative file names in a common subfile. |
| 21126 | |
| 21127 | Using the `list' example from the GDB testsuite, which resides in |
| 21128 | /srcdir and compiling it with Irix6.2 cc in /compdir using a filename |
| 21129 | of /srcdir/list0.c yields the following debugging information for list0.c: |
| 21130 | |
| 21131 | DW_AT_name: /srcdir/list0.c |
| 21132 | DW_AT_comp_dir: /compdir |
| 21133 | files.files[0].name: list0.h |
| 21134 | files.files[0].dir: /srcdir |
| 21135 | files.files[1].name: list0.c |
| 21136 | files.files[1].dir: /srcdir |
| 21137 | |
| 21138 | The line number information for list0.c has to end up in a single |
| 21139 | subfile, so that `break /srcdir/list0.c:1' works as expected. |
| 21140 | start_subfile will ensure that this happens provided that we pass the |
| 21141 | concatenation of files.files[1].dir and files.files[1].name as the |
| 21142 | subfile's name. */ |
| 21143 | |
| 21144 | static void |
| 21145 | dwarf2_start_subfile (const char *filename, const char *dirname) |
| 21146 | { |
| 21147 | char *copy = NULL; |
| 21148 | |
| 21149 | /* In order not to lose the line information directory, |
| 21150 | we concatenate it to the filename when it makes sense. |
| 21151 | Note that the Dwarf3 standard says (speaking of filenames in line |
| 21152 | information): ``The directory index is ignored for file names |
| 21153 | that represent full path names''. Thus ignoring dirname in the |
| 21154 | `else' branch below isn't an issue. */ |
| 21155 | |
| 21156 | if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL) |
| 21157 | { |
| 21158 | copy = concat (dirname, SLASH_STRING, filename, (char *)NULL); |
| 21159 | filename = copy; |
| 21160 | } |
| 21161 | |
| 21162 | start_subfile (filename); |
| 21163 | |
| 21164 | if (copy != NULL) |
| 21165 | xfree (copy); |
| 21166 | } |
| 21167 | |
| 21168 | /* Start a symtab for DWARF. |
| 21169 | NAME, COMP_DIR, LOW_PC are passed to start_symtab. */ |
| 21170 | |
| 21171 | static struct compunit_symtab * |
| 21172 | dwarf2_start_symtab (struct dwarf2_cu *cu, |
| 21173 | const char *name, const char *comp_dir, CORE_ADDR low_pc) |
| 21174 | { |
| 21175 | struct compunit_symtab *cust |
| 21176 | = start_symtab (cu->per_cu->dwarf2_per_objfile->objfile, name, comp_dir, |
| 21177 | low_pc, cu->language); |
| 21178 | |
| 21179 | record_debugformat ("DWARF 2"); |
| 21180 | record_producer (cu->producer); |
| 21181 | |
| 21182 | /* We assume that we're processing GCC output. */ |
| 21183 | processing_gcc_compilation = 2; |
| 21184 | |
| 21185 | cu->processing_has_namespace_info = 0; |
| 21186 | |
| 21187 | return cust; |
| 21188 | } |
| 21189 | |
| 21190 | static void |
| 21191 | var_decode_location (struct attribute *attr, struct symbol *sym, |
| 21192 | struct dwarf2_cu *cu) |
| 21193 | { |
| 21194 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 21195 | struct comp_unit_head *cu_header = &cu->header; |
| 21196 | |
| 21197 | /* NOTE drow/2003-01-30: There used to be a comment and some special |
| 21198 | code here to turn a symbol with DW_AT_external and a |
| 21199 | SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was |
| 21200 | necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux |
| 21201 | with some versions of binutils) where shared libraries could have |
| 21202 | relocations against symbols in their debug information - the |
| 21203 | minimal symbol would have the right address, but the debug info |
| 21204 | would not. It's no longer necessary, because we will explicitly |
| 21205 | apply relocations when we read in the debug information now. */ |
| 21206 | |
| 21207 | /* A DW_AT_location attribute with no contents indicates that a |
| 21208 | variable has been optimized away. */ |
| 21209 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0) |
| 21210 | { |
| 21211 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
| 21212 | return; |
| 21213 | } |
| 21214 | |
| 21215 | /* Handle one degenerate form of location expression specially, to |
| 21216 | preserve GDB's previous behavior when section offsets are |
| 21217 | specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index |
| 21218 | then mark this symbol as LOC_STATIC. */ |
| 21219 | |
| 21220 | if (attr_form_is_block (attr) |
| 21221 | && ((DW_BLOCK (attr)->data[0] == DW_OP_addr |
| 21222 | && DW_BLOCK (attr)->size == 1 + cu_header->addr_size) |
| 21223 | || (DW_BLOCK (attr)->data[0] == DW_OP_GNU_addr_index |
| 21224 | && (DW_BLOCK (attr)->size |
| 21225 | == 1 + leb128_size (&DW_BLOCK (attr)->data[1]))))) |
| 21226 | { |
| 21227 | unsigned int dummy; |
| 21228 | |
| 21229 | if (DW_BLOCK (attr)->data[0] == DW_OP_addr) |
| 21230 | SYMBOL_VALUE_ADDRESS (sym) = |
| 21231 | read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy); |
| 21232 | else |
| 21233 | SYMBOL_VALUE_ADDRESS (sym) = |
| 21234 | read_addr_index_from_leb128 (cu, DW_BLOCK (attr)->data + 1, &dummy); |
| 21235 | SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC; |
| 21236 | fixup_symbol_section (sym, objfile); |
| 21237 | SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets, |
| 21238 | SYMBOL_SECTION (sym)); |
| 21239 | return; |
| 21240 | } |
| 21241 | |
| 21242 | /* NOTE drow/2002-01-30: It might be worthwhile to have a static |
| 21243 | expression evaluator, and use LOC_COMPUTED only when necessary |
| 21244 | (i.e. when the value of a register or memory location is |
| 21245 | referenced, or a thread-local block, etc.). Then again, it might |
| 21246 | not be worthwhile. I'm assuming that it isn't unless performance |
| 21247 | or memory numbers show me otherwise. */ |
| 21248 | |
| 21249 | dwarf2_symbol_mark_computed (attr, sym, cu, 0); |
| 21250 | |
| 21251 | if (SYMBOL_COMPUTED_OPS (sym)->location_has_loclist) |
| 21252 | cu->has_loclist = 1; |
| 21253 | } |
| 21254 | |
| 21255 | /* Given a pointer to a DWARF information entry, figure out if we need |
| 21256 | to make a symbol table entry for it, and if so, create a new entry |
| 21257 | and return a pointer to it. |
| 21258 | If TYPE is NULL, determine symbol type from the die, otherwise |
| 21259 | used the passed type. |
| 21260 | If SPACE is not NULL, use it to hold the new symbol. If it is |
| 21261 | NULL, allocate a new symbol on the objfile's obstack. */ |
| 21262 | |
| 21263 | static struct symbol * |
| 21264 | new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu, |
| 21265 | struct symbol *space) |
| 21266 | { |
| 21267 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 21268 | = cu->per_cu->dwarf2_per_objfile; |
| 21269 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 21270 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
| 21271 | struct symbol *sym = NULL; |
| 21272 | const char *name; |
| 21273 | struct attribute *attr = NULL; |
| 21274 | struct attribute *attr2 = NULL; |
| 21275 | CORE_ADDR baseaddr; |
| 21276 | struct pending **list_to_add = NULL; |
| 21277 | |
| 21278 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
| 21279 | |
| 21280 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
| 21281 | |
| 21282 | name = dwarf2_name (die, cu); |
| 21283 | if (name) |
| 21284 | { |
| 21285 | const char *linkagename; |
| 21286 | int suppress_add = 0; |
| 21287 | |
| 21288 | if (space) |
| 21289 | sym = space; |
| 21290 | else |
| 21291 | sym = allocate_symbol (objfile); |
| 21292 | OBJSTAT (objfile, n_syms++); |
| 21293 | |
| 21294 | /* Cache this symbol's name and the name's demangled form (if any). */ |
| 21295 | SYMBOL_SET_LANGUAGE (sym, cu->language, &objfile->objfile_obstack); |
| 21296 | linkagename = dwarf2_physname (name, die, cu); |
| 21297 | SYMBOL_SET_NAMES (sym, linkagename, strlen (linkagename), 0, objfile); |
| 21298 | |
| 21299 | /* Fortran does not have mangling standard and the mangling does differ |
| 21300 | between gfortran, iFort etc. */ |
| 21301 | if (cu->language == language_fortran |
| 21302 | && symbol_get_demangled_name (&(sym->ginfo)) == NULL) |
| 21303 | symbol_set_demangled_name (&(sym->ginfo), |
| 21304 | dwarf2_full_name (name, die, cu), |
| 21305 | NULL); |
| 21306 | |
| 21307 | /* Default assumptions. |
| 21308 | Use the passed type or decode it from the die. */ |
| 21309 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
| 21310 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
| 21311 | if (type != NULL) |
| 21312 | SYMBOL_TYPE (sym) = type; |
| 21313 | else |
| 21314 | SYMBOL_TYPE (sym) = die_type (die, cu); |
| 21315 | attr = dwarf2_attr (die, |
| 21316 | inlined_func ? DW_AT_call_line : DW_AT_decl_line, |
| 21317 | cu); |
| 21318 | if (attr) |
| 21319 | { |
| 21320 | SYMBOL_LINE (sym) = DW_UNSND (attr); |
| 21321 | } |
| 21322 | |
| 21323 | attr = dwarf2_attr (die, |
| 21324 | inlined_func ? DW_AT_call_file : DW_AT_decl_file, |
| 21325 | cu); |
| 21326 | if (attr) |
| 21327 | { |
| 21328 | file_name_index file_index = (file_name_index) DW_UNSND (attr); |
| 21329 | struct file_entry *fe; |
| 21330 | |
| 21331 | if (cu->line_header != NULL) |
| 21332 | fe = cu->line_header->file_name_at (file_index); |
| 21333 | else |
| 21334 | fe = NULL; |
| 21335 | |
| 21336 | if (fe == NULL) |
| 21337 | complaint (&symfile_complaints, |
| 21338 | _("file index out of range")); |
| 21339 | else |
| 21340 | symbol_set_symtab (sym, fe->symtab); |
| 21341 | } |
| 21342 | |
| 21343 | switch (die->tag) |
| 21344 | { |
| 21345 | case DW_TAG_label: |
| 21346 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
| 21347 | if (attr) |
| 21348 | { |
| 21349 | CORE_ADDR addr; |
| 21350 | |
| 21351 | addr = attr_value_as_address (attr); |
| 21352 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, addr + baseaddr); |
| 21353 | SYMBOL_VALUE_ADDRESS (sym) = addr; |
| 21354 | } |
| 21355 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_core_addr; |
| 21356 | SYMBOL_DOMAIN (sym) = LABEL_DOMAIN; |
| 21357 | SYMBOL_ACLASS_INDEX (sym) = LOC_LABEL; |
| 21358 | add_symbol_to_list (sym, cu->list_in_scope); |
| 21359 | break; |
| 21360 | case DW_TAG_subprogram: |
| 21361 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by |
| 21362 | finish_block. */ |
| 21363 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
| 21364 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
| 21365 | if ((attr2 && (DW_UNSND (attr2) != 0)) |
| 21366 | || cu->language == language_ada) |
| 21367 | { |
| 21368 | /* Subprograms marked external are stored as a global symbol. |
| 21369 | Ada subprograms, whether marked external or not, are always |
| 21370 | stored as a global symbol, because we want to be able to |
| 21371 | access them globally. For instance, we want to be able |
| 21372 | to break on a nested subprogram without having to |
| 21373 | specify the context. */ |
| 21374 | list_to_add = &global_symbols; |
| 21375 | } |
| 21376 | else |
| 21377 | { |
| 21378 | list_to_add = cu->list_in_scope; |
| 21379 | } |
| 21380 | break; |
| 21381 | case DW_TAG_inlined_subroutine: |
| 21382 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by |
| 21383 | finish_block. */ |
| 21384 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
| 21385 | SYMBOL_INLINED (sym) = 1; |
| 21386 | list_to_add = cu->list_in_scope; |
| 21387 | break; |
| 21388 | case DW_TAG_template_value_param: |
| 21389 | suppress_add = 1; |
| 21390 | /* Fall through. */ |
| 21391 | case DW_TAG_constant: |
| 21392 | case DW_TAG_variable: |
| 21393 | case DW_TAG_member: |
| 21394 | /* Compilation with minimal debug info may result in |
| 21395 | variables with missing type entries. Change the |
| 21396 | misleading `void' type to something sensible. */ |
| 21397 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID) |
| 21398 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_int; |
| 21399 | |
| 21400 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
| 21401 | /* In the case of DW_TAG_member, we should only be called for |
| 21402 | static const members. */ |
| 21403 | if (die->tag == DW_TAG_member) |
| 21404 | { |
| 21405 | /* dwarf2_add_field uses die_is_declaration, |
| 21406 | so we do the same. */ |
| 21407 | gdb_assert (die_is_declaration (die, cu)); |
| 21408 | gdb_assert (attr); |
| 21409 | } |
| 21410 | if (attr) |
| 21411 | { |
| 21412 | dwarf2_const_value (attr, sym, cu); |
| 21413 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
| 21414 | if (!suppress_add) |
| 21415 | { |
| 21416 | if (attr2 && (DW_UNSND (attr2) != 0)) |
| 21417 | list_to_add = &global_symbols; |
| 21418 | else |
| 21419 | list_to_add = cu->list_in_scope; |
| 21420 | } |
| 21421 | break; |
| 21422 | } |
| 21423 | attr = dwarf2_attr (die, DW_AT_location, cu); |
| 21424 | if (attr) |
| 21425 | { |
| 21426 | var_decode_location (attr, sym, cu); |
| 21427 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
| 21428 | |
| 21429 | /* Fortran explicitly imports any global symbols to the local |
| 21430 | scope by DW_TAG_common_block. */ |
| 21431 | if (cu->language == language_fortran && die->parent |
| 21432 | && die->parent->tag == DW_TAG_common_block) |
| 21433 | attr2 = NULL; |
| 21434 | |
| 21435 | if (SYMBOL_CLASS (sym) == LOC_STATIC |
| 21436 | && SYMBOL_VALUE_ADDRESS (sym) == 0 |
| 21437 | && !dwarf2_per_objfile->has_section_at_zero) |
| 21438 | { |
| 21439 | /* When a static variable is eliminated by the linker, |
| 21440 | the corresponding debug information is not stripped |
| 21441 | out, but the variable address is set to null; |
| 21442 | do not add such variables into symbol table. */ |
| 21443 | } |
| 21444 | else if (attr2 && (DW_UNSND (attr2) != 0)) |
| 21445 | { |
| 21446 | /* Workaround gfortran PR debug/40040 - it uses |
| 21447 | DW_AT_location for variables in -fPIC libraries which may |
| 21448 | get overriden by other libraries/executable and get |
| 21449 | a different address. Resolve it by the minimal symbol |
| 21450 | which may come from inferior's executable using copy |
| 21451 | relocation. Make this workaround only for gfortran as for |
| 21452 | other compilers GDB cannot guess the minimal symbol |
| 21453 | Fortran mangling kind. */ |
| 21454 | if (cu->language == language_fortran && die->parent |
| 21455 | && die->parent->tag == DW_TAG_module |
| 21456 | && cu->producer |
| 21457 | && startswith (cu->producer, "GNU Fortran")) |
| 21458 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
| 21459 | |
| 21460 | /* A variable with DW_AT_external is never static, |
| 21461 | but it may be block-scoped. */ |
| 21462 | list_to_add = (cu->list_in_scope == &file_symbols |
| 21463 | ? &global_symbols : cu->list_in_scope); |
| 21464 | } |
| 21465 | else |
| 21466 | list_to_add = cu->list_in_scope; |
| 21467 | } |
| 21468 | else |
| 21469 | { |
| 21470 | /* We do not know the address of this symbol. |
| 21471 | If it is an external symbol and we have type information |
| 21472 | for it, enter the symbol as a LOC_UNRESOLVED symbol. |
| 21473 | The address of the variable will then be determined from |
| 21474 | the minimal symbol table whenever the variable is |
| 21475 | referenced. */ |
| 21476 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
| 21477 | |
| 21478 | /* Fortran explicitly imports any global symbols to the local |
| 21479 | scope by DW_TAG_common_block. */ |
| 21480 | if (cu->language == language_fortran && die->parent |
| 21481 | && die->parent->tag == DW_TAG_common_block) |
| 21482 | { |
| 21483 | /* SYMBOL_CLASS doesn't matter here because |
| 21484 | read_common_block is going to reset it. */ |
| 21485 | if (!suppress_add) |
| 21486 | list_to_add = cu->list_in_scope; |
| 21487 | } |
| 21488 | else if (attr2 && (DW_UNSND (attr2) != 0) |
| 21489 | && dwarf2_attr (die, DW_AT_type, cu) != NULL) |
| 21490 | { |
| 21491 | /* A variable with DW_AT_external is never static, but it |
| 21492 | may be block-scoped. */ |
| 21493 | list_to_add = (cu->list_in_scope == &file_symbols |
| 21494 | ? &global_symbols : cu->list_in_scope); |
| 21495 | |
| 21496 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
| 21497 | } |
| 21498 | else if (!die_is_declaration (die, cu)) |
| 21499 | { |
| 21500 | /* Use the default LOC_OPTIMIZED_OUT class. */ |
| 21501 | gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT); |
| 21502 | if (!suppress_add) |
| 21503 | list_to_add = cu->list_in_scope; |
| 21504 | } |
| 21505 | } |
| 21506 | break; |
| 21507 | case DW_TAG_formal_parameter: |
| 21508 | /* If we are inside a function, mark this as an argument. If |
| 21509 | not, we might be looking at an argument to an inlined function |
| 21510 | when we do not have enough information to show inlined frames; |
| 21511 | pretend it's a local variable in that case so that the user can |
| 21512 | still see it. */ |
| 21513 | if (context_stack_depth > 0 |
| 21514 | && context_stack[context_stack_depth - 1].name != NULL) |
| 21515 | SYMBOL_IS_ARGUMENT (sym) = 1; |
| 21516 | attr = dwarf2_attr (die, DW_AT_location, cu); |
| 21517 | if (attr) |
| 21518 | { |
| 21519 | var_decode_location (attr, sym, cu); |
| 21520 | } |
| 21521 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
| 21522 | if (attr) |
| 21523 | { |
| 21524 | dwarf2_const_value (attr, sym, cu); |
| 21525 | } |
| 21526 | |
| 21527 | list_to_add = cu->list_in_scope; |
| 21528 | break; |
| 21529 | case DW_TAG_unspecified_parameters: |
| 21530 | /* From varargs functions; gdb doesn't seem to have any |
| 21531 | interest in this information, so just ignore it for now. |
| 21532 | (FIXME?) */ |
| 21533 | break; |
| 21534 | case DW_TAG_template_type_param: |
| 21535 | suppress_add = 1; |
| 21536 | /* Fall through. */ |
| 21537 | case DW_TAG_class_type: |
| 21538 | case DW_TAG_interface_type: |
| 21539 | case DW_TAG_structure_type: |
| 21540 | case DW_TAG_union_type: |
| 21541 | case DW_TAG_set_type: |
| 21542 | case DW_TAG_enumeration_type: |
| 21543 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
| 21544 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; |
| 21545 | |
| 21546 | { |
| 21547 | /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't |
| 21548 | really ever be static objects: otherwise, if you try |
| 21549 | to, say, break of a class's method and you're in a file |
| 21550 | which doesn't mention that class, it won't work unless |
| 21551 | the check for all static symbols in lookup_symbol_aux |
| 21552 | saves you. See the OtherFileClass tests in |
| 21553 | gdb.c++/namespace.exp. */ |
| 21554 | |
| 21555 | if (!suppress_add) |
| 21556 | { |
| 21557 | list_to_add = (cu->list_in_scope == &file_symbols |
| 21558 | && cu->language == language_cplus |
| 21559 | ? &global_symbols : cu->list_in_scope); |
| 21560 | |
| 21561 | /* The semantics of C++ state that "struct foo { |
| 21562 | ... }" also defines a typedef for "foo". */ |
| 21563 | if (cu->language == language_cplus |
| 21564 | || cu->language == language_ada |
| 21565 | || cu->language == language_d |
| 21566 | || cu->language == language_rust) |
| 21567 | { |
| 21568 | /* The symbol's name is already allocated along |
| 21569 | with this objfile, so we don't need to |
| 21570 | duplicate it for the type. */ |
| 21571 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0) |
| 21572 | TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_SEARCH_NAME (sym); |
| 21573 | } |
| 21574 | } |
| 21575 | } |
| 21576 | break; |
| 21577 | case DW_TAG_typedef: |
| 21578 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
| 21579 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
| 21580 | list_to_add = cu->list_in_scope; |
| 21581 | break; |
| 21582 | case DW_TAG_base_type: |
| 21583 | case DW_TAG_subrange_type: |
| 21584 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
| 21585 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
| 21586 | list_to_add = cu->list_in_scope; |
| 21587 | break; |
| 21588 | case DW_TAG_enumerator: |
| 21589 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
| 21590 | if (attr) |
| 21591 | { |
| 21592 | dwarf2_const_value (attr, sym, cu); |
| 21593 | } |
| 21594 | { |
| 21595 | /* NOTE: carlton/2003-11-10: See comment above in the |
| 21596 | DW_TAG_class_type, etc. block. */ |
| 21597 | |
| 21598 | list_to_add = (cu->list_in_scope == &file_symbols |
| 21599 | && cu->language == language_cplus |
| 21600 | ? &global_symbols : cu->list_in_scope); |
| 21601 | } |
| 21602 | break; |
| 21603 | case DW_TAG_imported_declaration: |
| 21604 | case DW_TAG_namespace: |
| 21605 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
| 21606 | list_to_add = &global_symbols; |
| 21607 | break; |
| 21608 | case DW_TAG_module: |
| 21609 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
| 21610 | SYMBOL_DOMAIN (sym) = MODULE_DOMAIN; |
| 21611 | list_to_add = &global_symbols; |
| 21612 | break; |
| 21613 | case DW_TAG_common_block: |
| 21614 | SYMBOL_ACLASS_INDEX (sym) = LOC_COMMON_BLOCK; |
| 21615 | SYMBOL_DOMAIN (sym) = COMMON_BLOCK_DOMAIN; |
| 21616 | add_symbol_to_list (sym, cu->list_in_scope); |
| 21617 | break; |
| 21618 | default: |
| 21619 | /* Not a tag we recognize. Hopefully we aren't processing |
| 21620 | trash data, but since we must specifically ignore things |
| 21621 | we don't recognize, there is nothing else we should do at |
| 21622 | this point. */ |
| 21623 | complaint (&symfile_complaints, _("unsupported tag: '%s'"), |
| 21624 | dwarf_tag_name (die->tag)); |
| 21625 | break; |
| 21626 | } |
| 21627 | |
| 21628 | if (suppress_add) |
| 21629 | { |
| 21630 | sym->hash_next = objfile->template_symbols; |
| 21631 | objfile->template_symbols = sym; |
| 21632 | list_to_add = NULL; |
| 21633 | } |
| 21634 | |
| 21635 | if (list_to_add != NULL) |
| 21636 | add_symbol_to_list (sym, list_to_add); |
| 21637 | |
| 21638 | /* For the benefit of old versions of GCC, check for anonymous |
| 21639 | namespaces based on the demangled name. */ |
| 21640 | if (!cu->processing_has_namespace_info |
| 21641 | && cu->language == language_cplus) |
| 21642 | cp_scan_for_anonymous_namespaces (sym, objfile); |
| 21643 | } |
| 21644 | return (sym); |
| 21645 | } |
| 21646 | |
| 21647 | /* Given an attr with a DW_FORM_dataN value in host byte order, |
| 21648 | zero-extend it as appropriate for the symbol's type. The DWARF |
| 21649 | standard (v4) is not entirely clear about the meaning of using |
| 21650 | DW_FORM_dataN for a constant with a signed type, where the type is |
| 21651 | wider than the data. The conclusion of a discussion on the DWARF |
| 21652 | list was that this is unspecified. We choose to always zero-extend |
| 21653 | because that is the interpretation long in use by GCC. */ |
| 21654 | |
| 21655 | static gdb_byte * |
| 21656 | dwarf2_const_value_data (const struct attribute *attr, struct obstack *obstack, |
| 21657 | struct dwarf2_cu *cu, LONGEST *value, int bits) |
| 21658 | { |
| 21659 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 21660 | enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ? |
| 21661 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE; |
| 21662 | LONGEST l = DW_UNSND (attr); |
| 21663 | |
| 21664 | if (bits < sizeof (*value) * 8) |
| 21665 | { |
| 21666 | l &= ((LONGEST) 1 << bits) - 1; |
| 21667 | *value = l; |
| 21668 | } |
| 21669 | else if (bits == sizeof (*value) * 8) |
| 21670 | *value = l; |
| 21671 | else |
| 21672 | { |
| 21673 | gdb_byte *bytes = (gdb_byte *) obstack_alloc (obstack, bits / 8); |
| 21674 | store_unsigned_integer (bytes, bits / 8, byte_order, l); |
| 21675 | return bytes; |
| 21676 | } |
| 21677 | |
| 21678 | return NULL; |
| 21679 | } |
| 21680 | |
| 21681 | /* Read a constant value from an attribute. Either set *VALUE, or if |
| 21682 | the value does not fit in *VALUE, set *BYTES - either already |
| 21683 | allocated on the objfile obstack, or newly allocated on OBSTACK, |
| 21684 | or, set *BATON, if we translated the constant to a location |
| 21685 | expression. */ |
| 21686 | |
| 21687 | static void |
| 21688 | dwarf2_const_value_attr (const struct attribute *attr, struct type *type, |
| 21689 | const char *name, struct obstack *obstack, |
| 21690 | struct dwarf2_cu *cu, |
| 21691 | LONGEST *value, const gdb_byte **bytes, |
| 21692 | struct dwarf2_locexpr_baton **baton) |
| 21693 | { |
| 21694 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 21695 | struct comp_unit_head *cu_header = &cu->header; |
| 21696 | struct dwarf_block *blk; |
| 21697 | enum bfd_endian byte_order = (bfd_big_endian (objfile->obfd) ? |
| 21698 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); |
| 21699 | |
| 21700 | *value = 0; |
| 21701 | *bytes = NULL; |
| 21702 | *baton = NULL; |
| 21703 | |
| 21704 | switch (attr->form) |
| 21705 | { |
| 21706 | case DW_FORM_addr: |
| 21707 | case DW_FORM_GNU_addr_index: |
| 21708 | { |
| 21709 | gdb_byte *data; |
| 21710 | |
| 21711 | if (TYPE_LENGTH (type) != cu_header->addr_size) |
| 21712 | dwarf2_const_value_length_mismatch_complaint (name, |
| 21713 | cu_header->addr_size, |
| 21714 | TYPE_LENGTH (type)); |
| 21715 | /* Symbols of this form are reasonably rare, so we just |
| 21716 | piggyback on the existing location code rather than writing |
| 21717 | a new implementation of symbol_computed_ops. */ |
| 21718 | *baton = XOBNEW (obstack, struct dwarf2_locexpr_baton); |
| 21719 | (*baton)->per_cu = cu->per_cu; |
| 21720 | gdb_assert ((*baton)->per_cu); |
| 21721 | |
| 21722 | (*baton)->size = 2 + cu_header->addr_size; |
| 21723 | data = (gdb_byte *) obstack_alloc (obstack, (*baton)->size); |
| 21724 | (*baton)->data = data; |
| 21725 | |
| 21726 | data[0] = DW_OP_addr; |
| 21727 | store_unsigned_integer (&data[1], cu_header->addr_size, |
| 21728 | byte_order, DW_ADDR (attr)); |
| 21729 | data[cu_header->addr_size + 1] = DW_OP_stack_value; |
| 21730 | } |
| 21731 | break; |
| 21732 | case DW_FORM_string: |
| 21733 | case DW_FORM_strp: |
| 21734 | case DW_FORM_GNU_str_index: |
| 21735 | case DW_FORM_GNU_strp_alt: |
| 21736 | /* DW_STRING is already allocated on the objfile obstack, point |
| 21737 | directly to it. */ |
| 21738 | *bytes = (const gdb_byte *) DW_STRING (attr); |
| 21739 | break; |
| 21740 | case DW_FORM_block1: |
| 21741 | case DW_FORM_block2: |
| 21742 | case DW_FORM_block4: |
| 21743 | case DW_FORM_block: |
| 21744 | case DW_FORM_exprloc: |
| 21745 | case DW_FORM_data16: |
| 21746 | blk = DW_BLOCK (attr); |
| 21747 | if (TYPE_LENGTH (type) != blk->size) |
| 21748 | dwarf2_const_value_length_mismatch_complaint (name, blk->size, |
| 21749 | TYPE_LENGTH (type)); |
| 21750 | *bytes = blk->data; |
| 21751 | break; |
| 21752 | |
| 21753 | /* The DW_AT_const_value attributes are supposed to carry the |
| 21754 | symbol's value "represented as it would be on the target |
| 21755 | architecture." By the time we get here, it's already been |
| 21756 | converted to host endianness, so we just need to sign- or |
| 21757 | zero-extend it as appropriate. */ |
| 21758 | case DW_FORM_data1: |
| 21759 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 8); |
| 21760 | break; |
| 21761 | case DW_FORM_data2: |
| 21762 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 16); |
| 21763 | break; |
| 21764 | case DW_FORM_data4: |
| 21765 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 32); |
| 21766 | break; |
| 21767 | case DW_FORM_data8: |
| 21768 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 64); |
| 21769 | break; |
| 21770 | |
| 21771 | case DW_FORM_sdata: |
| 21772 | case DW_FORM_implicit_const: |
| 21773 | *value = DW_SND (attr); |
| 21774 | break; |
| 21775 | |
| 21776 | case DW_FORM_udata: |
| 21777 | *value = DW_UNSND (attr); |
| 21778 | break; |
| 21779 | |
| 21780 | default: |
| 21781 | complaint (&symfile_complaints, |
| 21782 | _("unsupported const value attribute form: '%s'"), |
| 21783 | dwarf_form_name (attr->form)); |
| 21784 | *value = 0; |
| 21785 | break; |
| 21786 | } |
| 21787 | } |
| 21788 | |
| 21789 | |
| 21790 | /* Copy constant value from an attribute to a symbol. */ |
| 21791 | |
| 21792 | static void |
| 21793 | dwarf2_const_value (const struct attribute *attr, struct symbol *sym, |
| 21794 | struct dwarf2_cu *cu) |
| 21795 | { |
| 21796 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 21797 | LONGEST value; |
| 21798 | const gdb_byte *bytes; |
| 21799 | struct dwarf2_locexpr_baton *baton; |
| 21800 | |
| 21801 | dwarf2_const_value_attr (attr, SYMBOL_TYPE (sym), |
| 21802 | SYMBOL_PRINT_NAME (sym), |
| 21803 | &objfile->objfile_obstack, cu, |
| 21804 | &value, &bytes, &baton); |
| 21805 | |
| 21806 | if (baton != NULL) |
| 21807 | { |
| 21808 | SYMBOL_LOCATION_BATON (sym) = baton; |
| 21809 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
| 21810 | } |
| 21811 | else if (bytes != NULL) |
| 21812 | { |
| 21813 | SYMBOL_VALUE_BYTES (sym) = bytes; |
| 21814 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES; |
| 21815 | } |
| 21816 | else |
| 21817 | { |
| 21818 | SYMBOL_VALUE (sym) = value; |
| 21819 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST; |
| 21820 | } |
| 21821 | } |
| 21822 | |
| 21823 | /* Return the type of the die in question using its DW_AT_type attribute. */ |
| 21824 | |
| 21825 | static struct type * |
| 21826 | die_type (struct die_info *die, struct dwarf2_cu *cu) |
| 21827 | { |
| 21828 | struct attribute *type_attr; |
| 21829 | |
| 21830 | type_attr = dwarf2_attr (die, DW_AT_type, cu); |
| 21831 | if (!type_attr) |
| 21832 | { |
| 21833 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 21834 | /* A missing DW_AT_type represents a void type. */ |
| 21835 | return objfile_type (objfile)->builtin_void; |
| 21836 | } |
| 21837 | |
| 21838 | return lookup_die_type (die, type_attr, cu); |
| 21839 | } |
| 21840 | |
| 21841 | /* True iff CU's producer generates GNAT Ada auxiliary information |
| 21842 | that allows to find parallel types through that information instead |
| 21843 | of having to do expensive parallel lookups by type name. */ |
| 21844 | |
| 21845 | static int |
| 21846 | need_gnat_info (struct dwarf2_cu *cu) |
| 21847 | { |
| 21848 | /* Assume that the Ada compiler was GNAT, which always produces |
| 21849 | the auxiliary information. */ |
| 21850 | return (cu->language == language_ada); |
| 21851 | } |
| 21852 | |
| 21853 | /* Return the auxiliary type of the die in question using its |
| 21854 | DW_AT_GNAT_descriptive_type attribute. Returns NULL if the |
| 21855 | attribute is not present. */ |
| 21856 | |
| 21857 | static struct type * |
| 21858 | die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu) |
| 21859 | { |
| 21860 | struct attribute *type_attr; |
| 21861 | |
| 21862 | type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu); |
| 21863 | if (!type_attr) |
| 21864 | return NULL; |
| 21865 | |
| 21866 | return lookup_die_type (die, type_attr, cu); |
| 21867 | } |
| 21868 | |
| 21869 | /* If DIE has a descriptive_type attribute, then set the TYPE's |
| 21870 | descriptive type accordingly. */ |
| 21871 | |
| 21872 | static void |
| 21873 | set_descriptive_type (struct type *type, struct die_info *die, |
| 21874 | struct dwarf2_cu *cu) |
| 21875 | { |
| 21876 | struct type *descriptive_type = die_descriptive_type (die, cu); |
| 21877 | |
| 21878 | if (descriptive_type) |
| 21879 | { |
| 21880 | ALLOCATE_GNAT_AUX_TYPE (type); |
| 21881 | TYPE_DESCRIPTIVE_TYPE (type) = descriptive_type; |
| 21882 | } |
| 21883 | } |
| 21884 | |
| 21885 | /* Return the containing type of the die in question using its |
| 21886 | DW_AT_containing_type attribute. */ |
| 21887 | |
| 21888 | static struct type * |
| 21889 | die_containing_type (struct die_info *die, struct dwarf2_cu *cu) |
| 21890 | { |
| 21891 | struct attribute *type_attr; |
| 21892 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 21893 | |
| 21894 | type_attr = dwarf2_attr (die, DW_AT_containing_type, cu); |
| 21895 | if (!type_attr) |
| 21896 | error (_("Dwarf Error: Problem turning containing type into gdb type " |
| 21897 | "[in module %s]"), objfile_name (objfile)); |
| 21898 | |
| 21899 | return lookup_die_type (die, type_attr, cu); |
| 21900 | } |
| 21901 | |
| 21902 | /* Return an error marker type to use for the ill formed type in DIE/CU. */ |
| 21903 | |
| 21904 | static struct type * |
| 21905 | build_error_marker_type (struct dwarf2_cu *cu, struct die_info *die) |
| 21906 | { |
| 21907 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 21908 | = cu->per_cu->dwarf2_per_objfile; |
| 21909 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 21910 | char *message, *saved; |
| 21911 | |
| 21912 | message = xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"), |
| 21913 | objfile_name (objfile), |
| 21914 | to_underlying (cu->header.sect_off), |
| 21915 | to_underlying (die->sect_off)); |
| 21916 | saved = (char *) obstack_copy0 (&objfile->objfile_obstack, |
| 21917 | message, strlen (message)); |
| 21918 | xfree (message); |
| 21919 | |
| 21920 | return init_type (objfile, TYPE_CODE_ERROR, 0, saved); |
| 21921 | } |
| 21922 | |
| 21923 | /* Look up the type of DIE in CU using its type attribute ATTR. |
| 21924 | ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type, |
| 21925 | DW_AT_containing_type. |
| 21926 | If there is no type substitute an error marker. */ |
| 21927 | |
| 21928 | static struct type * |
| 21929 | lookup_die_type (struct die_info *die, const struct attribute *attr, |
| 21930 | struct dwarf2_cu *cu) |
| 21931 | { |
| 21932 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 21933 | = cu->per_cu->dwarf2_per_objfile; |
| 21934 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 21935 | struct type *this_type; |
| 21936 | |
| 21937 | gdb_assert (attr->name == DW_AT_type |
| 21938 | || attr->name == DW_AT_GNAT_descriptive_type |
| 21939 | || attr->name == DW_AT_containing_type); |
| 21940 | |
| 21941 | /* First see if we have it cached. */ |
| 21942 | |
| 21943 | if (attr->form == DW_FORM_GNU_ref_alt) |
| 21944 | { |
| 21945 | struct dwarf2_per_cu_data *per_cu; |
| 21946 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
| 21947 | |
| 21948 | per_cu = dwarf2_find_containing_comp_unit (sect_off, 1, |
| 21949 | dwarf2_per_objfile); |
| 21950 | this_type = get_die_type_at_offset (sect_off, per_cu); |
| 21951 | } |
| 21952 | else if (attr_form_is_ref (attr)) |
| 21953 | { |
| 21954 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
| 21955 | |
| 21956 | this_type = get_die_type_at_offset (sect_off, cu->per_cu); |
| 21957 | } |
| 21958 | else if (attr->form == DW_FORM_ref_sig8) |
| 21959 | { |
| 21960 | ULONGEST signature = DW_SIGNATURE (attr); |
| 21961 | |
| 21962 | return get_signatured_type (die, signature, cu); |
| 21963 | } |
| 21964 | else |
| 21965 | { |
| 21966 | complaint (&symfile_complaints, |
| 21967 | _("Dwarf Error: Bad type attribute %s in DIE" |
| 21968 | " at 0x%x [in module %s]"), |
| 21969 | dwarf_attr_name (attr->name), to_underlying (die->sect_off), |
| 21970 | objfile_name (objfile)); |
| 21971 | return build_error_marker_type (cu, die); |
| 21972 | } |
| 21973 | |
| 21974 | /* If not cached we need to read it in. */ |
| 21975 | |
| 21976 | if (this_type == NULL) |
| 21977 | { |
| 21978 | struct die_info *type_die = NULL; |
| 21979 | struct dwarf2_cu *type_cu = cu; |
| 21980 | |
| 21981 | if (attr_form_is_ref (attr)) |
| 21982 | type_die = follow_die_ref (die, attr, &type_cu); |
| 21983 | if (type_die == NULL) |
| 21984 | return build_error_marker_type (cu, die); |
| 21985 | /* If we find the type now, it's probably because the type came |
| 21986 | from an inter-CU reference and the type's CU got expanded before |
| 21987 | ours. */ |
| 21988 | this_type = read_type_die (type_die, type_cu); |
| 21989 | } |
| 21990 | |
| 21991 | /* If we still don't have a type use an error marker. */ |
| 21992 | |
| 21993 | if (this_type == NULL) |
| 21994 | return build_error_marker_type (cu, die); |
| 21995 | |
| 21996 | return this_type; |
| 21997 | } |
| 21998 | |
| 21999 | /* Return the type in DIE, CU. |
| 22000 | Returns NULL for invalid types. |
| 22001 | |
| 22002 | This first does a lookup in die_type_hash, |
| 22003 | and only reads the die in if necessary. |
| 22004 | |
| 22005 | NOTE: This can be called when reading in partial or full symbols. */ |
| 22006 | |
| 22007 | static struct type * |
| 22008 | read_type_die (struct die_info *die, struct dwarf2_cu *cu) |
| 22009 | { |
| 22010 | struct type *this_type; |
| 22011 | |
| 22012 | this_type = get_die_type (die, cu); |
| 22013 | if (this_type) |
| 22014 | return this_type; |
| 22015 | |
| 22016 | return read_type_die_1 (die, cu); |
| 22017 | } |
| 22018 | |
| 22019 | /* Read the type in DIE, CU. |
| 22020 | Returns NULL for invalid types. */ |
| 22021 | |
| 22022 | static struct type * |
| 22023 | read_type_die_1 (struct die_info *die, struct dwarf2_cu *cu) |
| 22024 | { |
| 22025 | struct type *this_type = NULL; |
| 22026 | |
| 22027 | switch (die->tag) |
| 22028 | { |
| 22029 | case DW_TAG_class_type: |
| 22030 | case DW_TAG_interface_type: |
| 22031 | case DW_TAG_structure_type: |
| 22032 | case DW_TAG_union_type: |
| 22033 | this_type = read_structure_type (die, cu); |
| 22034 | break; |
| 22035 | case DW_TAG_enumeration_type: |
| 22036 | this_type = read_enumeration_type (die, cu); |
| 22037 | break; |
| 22038 | case DW_TAG_subprogram: |
| 22039 | case DW_TAG_subroutine_type: |
| 22040 | case DW_TAG_inlined_subroutine: |
| 22041 | this_type = read_subroutine_type (die, cu); |
| 22042 | break; |
| 22043 | case DW_TAG_array_type: |
| 22044 | this_type = read_array_type (die, cu); |
| 22045 | break; |
| 22046 | case DW_TAG_set_type: |
| 22047 | this_type = read_set_type (die, cu); |
| 22048 | break; |
| 22049 | case DW_TAG_pointer_type: |
| 22050 | this_type = read_tag_pointer_type (die, cu); |
| 22051 | break; |
| 22052 | case DW_TAG_ptr_to_member_type: |
| 22053 | this_type = read_tag_ptr_to_member_type (die, cu); |
| 22054 | break; |
| 22055 | case DW_TAG_reference_type: |
| 22056 | this_type = read_tag_reference_type (die, cu, TYPE_CODE_REF); |
| 22057 | break; |
| 22058 | case DW_TAG_rvalue_reference_type: |
| 22059 | this_type = read_tag_reference_type (die, cu, TYPE_CODE_RVALUE_REF); |
| 22060 | break; |
| 22061 | case DW_TAG_const_type: |
| 22062 | this_type = read_tag_const_type (die, cu); |
| 22063 | break; |
| 22064 | case DW_TAG_volatile_type: |
| 22065 | this_type = read_tag_volatile_type (die, cu); |
| 22066 | break; |
| 22067 | case DW_TAG_restrict_type: |
| 22068 | this_type = read_tag_restrict_type (die, cu); |
| 22069 | break; |
| 22070 | case DW_TAG_string_type: |
| 22071 | this_type = read_tag_string_type (die, cu); |
| 22072 | break; |
| 22073 | case DW_TAG_typedef: |
| 22074 | this_type = read_typedef (die, cu); |
| 22075 | break; |
| 22076 | case DW_TAG_subrange_type: |
| 22077 | this_type = read_subrange_type (die, cu); |
| 22078 | break; |
| 22079 | case DW_TAG_base_type: |
| 22080 | this_type = read_base_type (die, cu); |
| 22081 | break; |
| 22082 | case DW_TAG_unspecified_type: |
| 22083 | this_type = read_unspecified_type (die, cu); |
| 22084 | break; |
| 22085 | case DW_TAG_namespace: |
| 22086 | this_type = read_namespace_type (die, cu); |
| 22087 | break; |
| 22088 | case DW_TAG_module: |
| 22089 | this_type = read_module_type (die, cu); |
| 22090 | break; |
| 22091 | case DW_TAG_atomic_type: |
| 22092 | this_type = read_tag_atomic_type (die, cu); |
| 22093 | break; |
| 22094 | default: |
| 22095 | complaint (&symfile_complaints, |
| 22096 | _("unexpected tag in read_type_die: '%s'"), |
| 22097 | dwarf_tag_name (die->tag)); |
| 22098 | break; |
| 22099 | } |
| 22100 | |
| 22101 | return this_type; |
| 22102 | } |
| 22103 | |
| 22104 | /* See if we can figure out if the class lives in a namespace. We do |
| 22105 | this by looking for a member function; its demangled name will |
| 22106 | contain namespace info, if there is any. |
| 22107 | Return the computed name or NULL. |
| 22108 | Space for the result is allocated on the objfile's obstack. |
| 22109 | This is the full-die version of guess_partial_die_structure_name. |
| 22110 | In this case we know DIE has no useful parent. */ |
| 22111 | |
| 22112 | static char * |
| 22113 | guess_full_die_structure_name (struct die_info *die, struct dwarf2_cu *cu) |
| 22114 | { |
| 22115 | struct die_info *spec_die; |
| 22116 | struct dwarf2_cu *spec_cu; |
| 22117 | struct die_info *child; |
| 22118 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 22119 | |
| 22120 | spec_cu = cu; |
| 22121 | spec_die = die_specification (die, &spec_cu); |
| 22122 | if (spec_die != NULL) |
| 22123 | { |
| 22124 | die = spec_die; |
| 22125 | cu = spec_cu; |
| 22126 | } |
| 22127 | |
| 22128 | for (child = die->child; |
| 22129 | child != NULL; |
| 22130 | child = child->sibling) |
| 22131 | { |
| 22132 | if (child->tag == DW_TAG_subprogram) |
| 22133 | { |
| 22134 | const char *linkage_name = dw2_linkage_name (child, cu); |
| 22135 | |
| 22136 | if (linkage_name != NULL) |
| 22137 | { |
| 22138 | char *actual_name |
| 22139 | = language_class_name_from_physname (cu->language_defn, |
| 22140 | linkage_name); |
| 22141 | char *name = NULL; |
| 22142 | |
| 22143 | if (actual_name != NULL) |
| 22144 | { |
| 22145 | const char *die_name = dwarf2_name (die, cu); |
| 22146 | |
| 22147 | if (die_name != NULL |
| 22148 | && strcmp (die_name, actual_name) != 0) |
| 22149 | { |
| 22150 | /* Strip off the class name from the full name. |
| 22151 | We want the prefix. */ |
| 22152 | int die_name_len = strlen (die_name); |
| 22153 | int actual_name_len = strlen (actual_name); |
| 22154 | |
| 22155 | /* Test for '::' as a sanity check. */ |
| 22156 | if (actual_name_len > die_name_len + 2 |
| 22157 | && actual_name[actual_name_len |
| 22158 | - die_name_len - 1] == ':') |
| 22159 | name = (char *) obstack_copy0 ( |
| 22160 | &objfile->per_bfd->storage_obstack, |
| 22161 | actual_name, actual_name_len - die_name_len - 2); |
| 22162 | } |
| 22163 | } |
| 22164 | xfree (actual_name); |
| 22165 | return name; |
| 22166 | } |
| 22167 | } |
| 22168 | } |
| 22169 | |
| 22170 | return NULL; |
| 22171 | } |
| 22172 | |
| 22173 | /* GCC might emit a nameless typedef that has a linkage name. Determine the |
| 22174 | prefix part in such case. See |
| 22175 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ |
| 22176 | |
| 22177 | static const char * |
| 22178 | anonymous_struct_prefix (struct die_info *die, struct dwarf2_cu *cu) |
| 22179 | { |
| 22180 | struct attribute *attr; |
| 22181 | const char *base; |
| 22182 | |
| 22183 | if (die->tag != DW_TAG_class_type && die->tag != DW_TAG_interface_type |
| 22184 | && die->tag != DW_TAG_structure_type && die->tag != DW_TAG_union_type) |
| 22185 | return NULL; |
| 22186 | |
| 22187 | if (dwarf2_string_attr (die, DW_AT_name, cu) != NULL) |
| 22188 | return NULL; |
| 22189 | |
| 22190 | attr = dw2_linkage_name_attr (die, cu); |
| 22191 | if (attr == NULL || DW_STRING (attr) == NULL) |
| 22192 | return NULL; |
| 22193 | |
| 22194 | /* dwarf2_name had to be already called. */ |
| 22195 | gdb_assert (DW_STRING_IS_CANONICAL (attr)); |
| 22196 | |
| 22197 | /* Strip the base name, keep any leading namespaces/classes. */ |
| 22198 | base = strrchr (DW_STRING (attr), ':'); |
| 22199 | if (base == NULL || base == DW_STRING (attr) || base[-1] != ':') |
| 22200 | return ""; |
| 22201 | |
| 22202 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 22203 | return (char *) obstack_copy0 (&objfile->per_bfd->storage_obstack, |
| 22204 | DW_STRING (attr), |
| 22205 | &base[-1] - DW_STRING (attr)); |
| 22206 | } |
| 22207 | |
| 22208 | /* Return the name of the namespace/class that DIE is defined within, |
| 22209 | or "" if we can't tell. The caller should not xfree the result. |
| 22210 | |
| 22211 | For example, if we're within the method foo() in the following |
| 22212 | code: |
| 22213 | |
| 22214 | namespace N { |
| 22215 | class C { |
| 22216 | void foo () { |
| 22217 | } |
| 22218 | }; |
| 22219 | } |
| 22220 | |
| 22221 | then determine_prefix on foo's die will return "N::C". */ |
| 22222 | |
| 22223 | static const char * |
| 22224 | determine_prefix (struct die_info *die, struct dwarf2_cu *cu) |
| 22225 | { |
| 22226 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 22227 | = cu->per_cu->dwarf2_per_objfile; |
| 22228 | struct die_info *parent, *spec_die; |
| 22229 | struct dwarf2_cu *spec_cu; |
| 22230 | struct type *parent_type; |
| 22231 | const char *retval; |
| 22232 | |
| 22233 | if (cu->language != language_cplus |
| 22234 | && cu->language != language_fortran && cu->language != language_d |
| 22235 | && cu->language != language_rust) |
| 22236 | return ""; |
| 22237 | |
| 22238 | retval = anonymous_struct_prefix (die, cu); |
| 22239 | if (retval) |
| 22240 | return retval; |
| 22241 | |
| 22242 | /* We have to be careful in the presence of DW_AT_specification. |
| 22243 | For example, with GCC 3.4, given the code |
| 22244 | |
| 22245 | namespace N { |
| 22246 | void foo() { |
| 22247 | // Definition of N::foo. |
| 22248 | } |
| 22249 | } |
| 22250 | |
| 22251 | then we'll have a tree of DIEs like this: |
| 22252 | |
| 22253 | 1: DW_TAG_compile_unit |
| 22254 | 2: DW_TAG_namespace // N |
| 22255 | 3: DW_TAG_subprogram // declaration of N::foo |
| 22256 | 4: DW_TAG_subprogram // definition of N::foo |
| 22257 | DW_AT_specification // refers to die #3 |
| 22258 | |
| 22259 | Thus, when processing die #4, we have to pretend that we're in |
| 22260 | the context of its DW_AT_specification, namely the contex of die |
| 22261 | #3. */ |
| 22262 | spec_cu = cu; |
| 22263 | spec_die = die_specification (die, &spec_cu); |
| 22264 | if (spec_die == NULL) |
| 22265 | parent = die->parent; |
| 22266 | else |
| 22267 | { |
| 22268 | parent = spec_die->parent; |
| 22269 | cu = spec_cu; |
| 22270 | } |
| 22271 | |
| 22272 | if (parent == NULL) |
| 22273 | return ""; |
| 22274 | else if (parent->building_fullname) |
| 22275 | { |
| 22276 | const char *name; |
| 22277 | const char *parent_name; |
| 22278 | |
| 22279 | /* It has been seen on RealView 2.2 built binaries, |
| 22280 | DW_TAG_template_type_param types actually _defined_ as |
| 22281 | children of the parent class: |
| 22282 | |
| 22283 | enum E {}; |
| 22284 | template class <class Enum> Class{}; |
| 22285 | Class<enum E> class_e; |
| 22286 | |
| 22287 | 1: DW_TAG_class_type (Class) |
| 22288 | 2: DW_TAG_enumeration_type (E) |
| 22289 | 3: DW_TAG_enumerator (enum1:0) |
| 22290 | 3: DW_TAG_enumerator (enum2:1) |
| 22291 | ... |
| 22292 | 2: DW_TAG_template_type_param |
| 22293 | DW_AT_type DW_FORM_ref_udata (E) |
| 22294 | |
| 22295 | Besides being broken debug info, it can put GDB into an |
| 22296 | infinite loop. Consider: |
| 22297 | |
| 22298 | When we're building the full name for Class<E>, we'll start |
| 22299 | at Class, and go look over its template type parameters, |
| 22300 | finding E. We'll then try to build the full name of E, and |
| 22301 | reach here. We're now trying to build the full name of E, |
| 22302 | and look over the parent DIE for containing scope. In the |
| 22303 | broken case, if we followed the parent DIE of E, we'd again |
| 22304 | find Class, and once again go look at its template type |
| 22305 | arguments, etc., etc. Simply don't consider such parent die |
| 22306 | as source-level parent of this die (it can't be, the language |
| 22307 | doesn't allow it), and break the loop here. */ |
| 22308 | name = dwarf2_name (die, cu); |
| 22309 | parent_name = dwarf2_name (parent, cu); |
| 22310 | complaint (&symfile_complaints, |
| 22311 | _("template param type '%s' defined within parent '%s'"), |
| 22312 | name ? name : "<unknown>", |
| 22313 | parent_name ? parent_name : "<unknown>"); |
| 22314 | return ""; |
| 22315 | } |
| 22316 | else |
| 22317 | switch (parent->tag) |
| 22318 | { |
| 22319 | case DW_TAG_namespace: |
| 22320 | parent_type = read_type_die (parent, cu); |
| 22321 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
| 22322 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. |
| 22323 | Work around this problem here. */ |
| 22324 | if (cu->language == language_cplus |
| 22325 | && strcmp (TYPE_TAG_NAME (parent_type), "::") == 0) |
| 22326 | return ""; |
| 22327 | /* We give a name to even anonymous namespaces. */ |
| 22328 | return TYPE_TAG_NAME (parent_type); |
| 22329 | case DW_TAG_class_type: |
| 22330 | case DW_TAG_interface_type: |
| 22331 | case DW_TAG_structure_type: |
| 22332 | case DW_TAG_union_type: |
| 22333 | case DW_TAG_module: |
| 22334 | parent_type = read_type_die (parent, cu); |
| 22335 | if (TYPE_TAG_NAME (parent_type) != NULL) |
| 22336 | return TYPE_TAG_NAME (parent_type); |
| 22337 | else |
| 22338 | /* An anonymous structure is only allowed non-static data |
| 22339 | members; no typedefs, no member functions, et cetera. |
| 22340 | So it does not need a prefix. */ |
| 22341 | return ""; |
| 22342 | case DW_TAG_compile_unit: |
| 22343 | case DW_TAG_partial_unit: |
| 22344 | /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */ |
| 22345 | if (cu->language == language_cplus |
| 22346 | && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types) |
| 22347 | && die->child != NULL |
| 22348 | && (die->tag == DW_TAG_class_type |
| 22349 | || die->tag == DW_TAG_structure_type |
| 22350 | || die->tag == DW_TAG_union_type)) |
| 22351 | { |
| 22352 | char *name = guess_full_die_structure_name (die, cu); |
| 22353 | if (name != NULL) |
| 22354 | return name; |
| 22355 | } |
| 22356 | return ""; |
| 22357 | case DW_TAG_enumeration_type: |
| 22358 | parent_type = read_type_die (parent, cu); |
| 22359 | if (TYPE_DECLARED_CLASS (parent_type)) |
| 22360 | { |
| 22361 | if (TYPE_TAG_NAME (parent_type) != NULL) |
| 22362 | return TYPE_TAG_NAME (parent_type); |
| 22363 | return ""; |
| 22364 | } |
| 22365 | /* Fall through. */ |
| 22366 | default: |
| 22367 | return determine_prefix (parent, cu); |
| 22368 | } |
| 22369 | } |
| 22370 | |
| 22371 | /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX |
| 22372 | with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then |
| 22373 | simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform |
| 22374 | an obconcat, otherwise allocate storage for the result. The CU argument is |
| 22375 | used to determine the language and hence, the appropriate separator. */ |
| 22376 | |
| 22377 | #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */ |
| 22378 | |
| 22379 | static char * |
| 22380 | typename_concat (struct obstack *obs, const char *prefix, const char *suffix, |
| 22381 | int physname, struct dwarf2_cu *cu) |
| 22382 | { |
| 22383 | const char *lead = ""; |
| 22384 | const char *sep; |
| 22385 | |
| 22386 | if (suffix == NULL || suffix[0] == '\0' |
| 22387 | || prefix == NULL || prefix[0] == '\0') |
| 22388 | sep = ""; |
| 22389 | else if (cu->language == language_d) |
| 22390 | { |
| 22391 | /* For D, the 'main' function could be defined in any module, but it |
| 22392 | should never be prefixed. */ |
| 22393 | if (strcmp (suffix, "D main") == 0) |
| 22394 | { |
| 22395 | prefix = ""; |
| 22396 | sep = ""; |
| 22397 | } |
| 22398 | else |
| 22399 | sep = "."; |
| 22400 | } |
| 22401 | else if (cu->language == language_fortran && physname) |
| 22402 | { |
| 22403 | /* This is gfortran specific mangling. Normally DW_AT_linkage_name or |
| 22404 | DW_AT_MIPS_linkage_name is preferred and used instead. */ |
| 22405 | |
| 22406 | lead = "__"; |
| 22407 | sep = "_MOD_"; |
| 22408 | } |
| 22409 | else |
| 22410 | sep = "::"; |
| 22411 | |
| 22412 | if (prefix == NULL) |
| 22413 | prefix = ""; |
| 22414 | if (suffix == NULL) |
| 22415 | suffix = ""; |
| 22416 | |
| 22417 | if (obs == NULL) |
| 22418 | { |
| 22419 | char *retval |
| 22420 | = ((char *) |
| 22421 | xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1)); |
| 22422 | |
| 22423 | strcpy (retval, lead); |
| 22424 | strcat (retval, prefix); |
| 22425 | strcat (retval, sep); |
| 22426 | strcat (retval, suffix); |
| 22427 | return retval; |
| 22428 | } |
| 22429 | else |
| 22430 | { |
| 22431 | /* We have an obstack. */ |
| 22432 | return obconcat (obs, lead, prefix, sep, suffix, (char *) NULL); |
| 22433 | } |
| 22434 | } |
| 22435 | |
| 22436 | /* Return sibling of die, NULL if no sibling. */ |
| 22437 | |
| 22438 | static struct die_info * |
| 22439 | sibling_die (struct die_info *die) |
| 22440 | { |
| 22441 | return die->sibling; |
| 22442 | } |
| 22443 | |
| 22444 | /* Get name of a die, return NULL if not found. */ |
| 22445 | |
| 22446 | static const char * |
| 22447 | dwarf2_canonicalize_name (const char *name, struct dwarf2_cu *cu, |
| 22448 | struct obstack *obstack) |
| 22449 | { |
| 22450 | if (name && cu->language == language_cplus) |
| 22451 | { |
| 22452 | std::string canon_name = cp_canonicalize_string (name); |
| 22453 | |
| 22454 | if (!canon_name.empty ()) |
| 22455 | { |
| 22456 | if (canon_name != name) |
| 22457 | name = (const char *) obstack_copy0 (obstack, |
| 22458 | canon_name.c_str (), |
| 22459 | canon_name.length ()); |
| 22460 | } |
| 22461 | } |
| 22462 | |
| 22463 | return name; |
| 22464 | } |
| 22465 | |
| 22466 | /* Get name of a die, return NULL if not found. |
| 22467 | Anonymous namespaces are converted to their magic string. */ |
| 22468 | |
| 22469 | static const char * |
| 22470 | dwarf2_name (struct die_info *die, struct dwarf2_cu *cu) |
| 22471 | { |
| 22472 | struct attribute *attr; |
| 22473 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 22474 | |
| 22475 | attr = dwarf2_attr (die, DW_AT_name, cu); |
| 22476 | if ((!attr || !DW_STRING (attr)) |
| 22477 | && die->tag != DW_TAG_namespace |
| 22478 | && die->tag != DW_TAG_class_type |
| 22479 | && die->tag != DW_TAG_interface_type |
| 22480 | && die->tag != DW_TAG_structure_type |
| 22481 | && die->tag != DW_TAG_union_type) |
| 22482 | return NULL; |
| 22483 | |
| 22484 | switch (die->tag) |
| 22485 | { |
| 22486 | case DW_TAG_compile_unit: |
| 22487 | case DW_TAG_partial_unit: |
| 22488 | /* Compilation units have a DW_AT_name that is a filename, not |
| 22489 | a source language identifier. */ |
| 22490 | case DW_TAG_enumeration_type: |
| 22491 | case DW_TAG_enumerator: |
| 22492 | /* These tags always have simple identifiers already; no need |
| 22493 | to canonicalize them. */ |
| 22494 | return DW_STRING (attr); |
| 22495 | |
| 22496 | case DW_TAG_namespace: |
| 22497 | if (attr != NULL && DW_STRING (attr) != NULL) |
| 22498 | return DW_STRING (attr); |
| 22499 | return CP_ANONYMOUS_NAMESPACE_STR; |
| 22500 | |
| 22501 | case DW_TAG_class_type: |
| 22502 | case DW_TAG_interface_type: |
| 22503 | case DW_TAG_structure_type: |
| 22504 | case DW_TAG_union_type: |
| 22505 | /* Some GCC versions emit spurious DW_AT_name attributes for unnamed |
| 22506 | structures or unions. These were of the form "._%d" in GCC 4.1, |
| 22507 | or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3 |
| 22508 | and GCC 4.4. We work around this problem by ignoring these. */ |
| 22509 | if (attr && DW_STRING (attr) |
| 22510 | && (startswith (DW_STRING (attr), "._") |
| 22511 | || startswith (DW_STRING (attr), "<anonymous"))) |
| 22512 | return NULL; |
| 22513 | |
| 22514 | /* GCC might emit a nameless typedef that has a linkage name. See |
| 22515 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ |
| 22516 | if (!attr || DW_STRING (attr) == NULL) |
| 22517 | { |
| 22518 | char *demangled = NULL; |
| 22519 | |
| 22520 | attr = dw2_linkage_name_attr (die, cu); |
| 22521 | if (attr == NULL || DW_STRING (attr) == NULL) |
| 22522 | return NULL; |
| 22523 | |
| 22524 | /* Avoid demangling DW_STRING (attr) the second time on a second |
| 22525 | call for the same DIE. */ |
| 22526 | if (!DW_STRING_IS_CANONICAL (attr)) |
| 22527 | demangled = gdb_demangle (DW_STRING (attr), DMGL_TYPES); |
| 22528 | |
| 22529 | if (demangled) |
| 22530 | { |
| 22531 | const char *base; |
| 22532 | |
| 22533 | /* FIXME: we already did this for the partial symbol... */ |
| 22534 | DW_STRING (attr) |
| 22535 | = ((const char *) |
| 22536 | obstack_copy0 (&objfile->per_bfd->storage_obstack, |
| 22537 | demangled, strlen (demangled))); |
| 22538 | DW_STRING_IS_CANONICAL (attr) = 1; |
| 22539 | xfree (demangled); |
| 22540 | |
| 22541 | /* Strip any leading namespaces/classes, keep only the base name. |
| 22542 | DW_AT_name for named DIEs does not contain the prefixes. */ |
| 22543 | base = strrchr (DW_STRING (attr), ':'); |
| 22544 | if (base && base > DW_STRING (attr) && base[-1] == ':') |
| 22545 | return &base[1]; |
| 22546 | else |
| 22547 | return DW_STRING (attr); |
| 22548 | } |
| 22549 | } |
| 22550 | break; |
| 22551 | |
| 22552 | default: |
| 22553 | break; |
| 22554 | } |
| 22555 | |
| 22556 | if (!DW_STRING_IS_CANONICAL (attr)) |
| 22557 | { |
| 22558 | DW_STRING (attr) |
| 22559 | = dwarf2_canonicalize_name (DW_STRING (attr), cu, |
| 22560 | &objfile->per_bfd->storage_obstack); |
| 22561 | DW_STRING_IS_CANONICAL (attr) = 1; |
| 22562 | } |
| 22563 | return DW_STRING (attr); |
| 22564 | } |
| 22565 | |
| 22566 | /* Return the die that this die in an extension of, or NULL if there |
| 22567 | is none. *EXT_CU is the CU containing DIE on input, and the CU |
| 22568 | containing the return value on output. */ |
| 22569 | |
| 22570 | static struct die_info * |
| 22571 | dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu) |
| 22572 | { |
| 22573 | struct attribute *attr; |
| 22574 | |
| 22575 | attr = dwarf2_attr (die, DW_AT_extension, *ext_cu); |
| 22576 | if (attr == NULL) |
| 22577 | return NULL; |
| 22578 | |
| 22579 | return follow_die_ref (die, attr, ext_cu); |
| 22580 | } |
| 22581 | |
| 22582 | /* Convert a DIE tag into its string name. */ |
| 22583 | |
| 22584 | static const char * |
| 22585 | dwarf_tag_name (unsigned tag) |
| 22586 | { |
| 22587 | const char *name = get_DW_TAG_name (tag); |
| 22588 | |
| 22589 | if (name == NULL) |
| 22590 | return "DW_TAG_<unknown>"; |
| 22591 | |
| 22592 | return name; |
| 22593 | } |
| 22594 | |
| 22595 | /* Convert a DWARF attribute code into its string name. */ |
| 22596 | |
| 22597 | static const char * |
| 22598 | dwarf_attr_name (unsigned attr) |
| 22599 | { |
| 22600 | const char *name; |
| 22601 | |
| 22602 | #ifdef MIPS /* collides with DW_AT_HP_block_index */ |
| 22603 | if (attr == DW_AT_MIPS_fde) |
| 22604 | return "DW_AT_MIPS_fde"; |
| 22605 | #else |
| 22606 | if (attr == DW_AT_HP_block_index) |
| 22607 | return "DW_AT_HP_block_index"; |
| 22608 | #endif |
| 22609 | |
| 22610 | name = get_DW_AT_name (attr); |
| 22611 | |
| 22612 | if (name == NULL) |
| 22613 | return "DW_AT_<unknown>"; |
| 22614 | |
| 22615 | return name; |
| 22616 | } |
| 22617 | |
| 22618 | /* Convert a DWARF value form code into its string name. */ |
| 22619 | |
| 22620 | static const char * |
| 22621 | dwarf_form_name (unsigned form) |
| 22622 | { |
| 22623 | const char *name = get_DW_FORM_name (form); |
| 22624 | |
| 22625 | if (name == NULL) |
| 22626 | return "DW_FORM_<unknown>"; |
| 22627 | |
| 22628 | return name; |
| 22629 | } |
| 22630 | |
| 22631 | static const char * |
| 22632 | dwarf_bool_name (unsigned mybool) |
| 22633 | { |
| 22634 | if (mybool) |
| 22635 | return "TRUE"; |
| 22636 | else |
| 22637 | return "FALSE"; |
| 22638 | } |
| 22639 | |
| 22640 | /* Convert a DWARF type code into its string name. */ |
| 22641 | |
| 22642 | static const char * |
| 22643 | dwarf_type_encoding_name (unsigned enc) |
| 22644 | { |
| 22645 | const char *name = get_DW_ATE_name (enc); |
| 22646 | |
| 22647 | if (name == NULL) |
| 22648 | return "DW_ATE_<unknown>"; |
| 22649 | |
| 22650 | return name; |
| 22651 | } |
| 22652 | |
| 22653 | static void |
| 22654 | dump_die_shallow (struct ui_file *f, int indent, struct die_info *die) |
| 22655 | { |
| 22656 | unsigned int i; |
| 22657 | |
| 22658 | print_spaces (indent, f); |
| 22659 | fprintf_unfiltered (f, "Die: %s (abbrev %d, offset 0x%x)\n", |
| 22660 | dwarf_tag_name (die->tag), die->abbrev, |
| 22661 | to_underlying (die->sect_off)); |
| 22662 | |
| 22663 | if (die->parent != NULL) |
| 22664 | { |
| 22665 | print_spaces (indent, f); |
| 22666 | fprintf_unfiltered (f, " parent at offset: 0x%x\n", |
| 22667 | to_underlying (die->parent->sect_off)); |
| 22668 | } |
| 22669 | |
| 22670 | print_spaces (indent, f); |
| 22671 | fprintf_unfiltered (f, " has children: %s\n", |
| 22672 | dwarf_bool_name (die->child != NULL)); |
| 22673 | |
| 22674 | print_spaces (indent, f); |
| 22675 | fprintf_unfiltered (f, " attributes:\n"); |
| 22676 | |
| 22677 | for (i = 0; i < die->num_attrs; ++i) |
| 22678 | { |
| 22679 | print_spaces (indent, f); |
| 22680 | fprintf_unfiltered (f, " %s (%s) ", |
| 22681 | dwarf_attr_name (die->attrs[i].name), |
| 22682 | dwarf_form_name (die->attrs[i].form)); |
| 22683 | |
| 22684 | switch (die->attrs[i].form) |
| 22685 | { |
| 22686 | case DW_FORM_addr: |
| 22687 | case DW_FORM_GNU_addr_index: |
| 22688 | fprintf_unfiltered (f, "address: "); |
| 22689 | fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f); |
| 22690 | break; |
| 22691 | case DW_FORM_block2: |
| 22692 | case DW_FORM_block4: |
| 22693 | case DW_FORM_block: |
| 22694 | case DW_FORM_block1: |
| 22695 | fprintf_unfiltered (f, "block: size %s", |
| 22696 | pulongest (DW_BLOCK (&die->attrs[i])->size)); |
| 22697 | break; |
| 22698 | case DW_FORM_exprloc: |
| 22699 | fprintf_unfiltered (f, "expression: size %s", |
| 22700 | pulongest (DW_BLOCK (&die->attrs[i])->size)); |
| 22701 | break; |
| 22702 | case DW_FORM_data16: |
| 22703 | fprintf_unfiltered (f, "constant of 16 bytes"); |
| 22704 | break; |
| 22705 | case DW_FORM_ref_addr: |
| 22706 | fprintf_unfiltered (f, "ref address: "); |
| 22707 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); |
| 22708 | break; |
| 22709 | case DW_FORM_GNU_ref_alt: |
| 22710 | fprintf_unfiltered (f, "alt ref address: "); |
| 22711 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); |
| 22712 | break; |
| 22713 | case DW_FORM_ref1: |
| 22714 | case DW_FORM_ref2: |
| 22715 | case DW_FORM_ref4: |
| 22716 | case DW_FORM_ref8: |
| 22717 | case DW_FORM_ref_udata: |
| 22718 | fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)", |
| 22719 | (long) (DW_UNSND (&die->attrs[i]))); |
| 22720 | break; |
| 22721 | case DW_FORM_data1: |
| 22722 | case DW_FORM_data2: |
| 22723 | case DW_FORM_data4: |
| 22724 | case DW_FORM_data8: |
| 22725 | case DW_FORM_udata: |
| 22726 | case DW_FORM_sdata: |
| 22727 | fprintf_unfiltered (f, "constant: %s", |
| 22728 | pulongest (DW_UNSND (&die->attrs[i]))); |
| 22729 | break; |
| 22730 | case DW_FORM_sec_offset: |
| 22731 | fprintf_unfiltered (f, "section offset: %s", |
| 22732 | pulongest (DW_UNSND (&die->attrs[i]))); |
| 22733 | break; |
| 22734 | case DW_FORM_ref_sig8: |
| 22735 | fprintf_unfiltered (f, "signature: %s", |
| 22736 | hex_string (DW_SIGNATURE (&die->attrs[i]))); |
| 22737 | break; |
| 22738 | case DW_FORM_string: |
| 22739 | case DW_FORM_strp: |
| 22740 | case DW_FORM_line_strp: |
| 22741 | case DW_FORM_GNU_str_index: |
| 22742 | case DW_FORM_GNU_strp_alt: |
| 22743 | fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)", |
| 22744 | DW_STRING (&die->attrs[i]) |
| 22745 | ? DW_STRING (&die->attrs[i]) : "", |
| 22746 | DW_STRING_IS_CANONICAL (&die->attrs[i]) ? "is" : "not"); |
| 22747 | break; |
| 22748 | case DW_FORM_flag: |
| 22749 | if (DW_UNSND (&die->attrs[i])) |
| 22750 | fprintf_unfiltered (f, "flag: TRUE"); |
| 22751 | else |
| 22752 | fprintf_unfiltered (f, "flag: FALSE"); |
| 22753 | break; |
| 22754 | case DW_FORM_flag_present: |
| 22755 | fprintf_unfiltered (f, "flag: TRUE"); |
| 22756 | break; |
| 22757 | case DW_FORM_indirect: |
| 22758 | /* The reader will have reduced the indirect form to |
| 22759 | the "base form" so this form should not occur. */ |
| 22760 | fprintf_unfiltered (f, |
| 22761 | "unexpected attribute form: DW_FORM_indirect"); |
| 22762 | break; |
| 22763 | case DW_FORM_implicit_const: |
| 22764 | fprintf_unfiltered (f, "constant: %s", |
| 22765 | plongest (DW_SND (&die->attrs[i]))); |
| 22766 | break; |
| 22767 | default: |
| 22768 | fprintf_unfiltered (f, "unsupported attribute form: %d.", |
| 22769 | die->attrs[i].form); |
| 22770 | break; |
| 22771 | } |
| 22772 | fprintf_unfiltered (f, "\n"); |
| 22773 | } |
| 22774 | } |
| 22775 | |
| 22776 | static void |
| 22777 | dump_die_for_error (struct die_info *die) |
| 22778 | { |
| 22779 | dump_die_shallow (gdb_stderr, 0, die); |
| 22780 | } |
| 22781 | |
| 22782 | static void |
| 22783 | dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die) |
| 22784 | { |
| 22785 | int indent = level * 4; |
| 22786 | |
| 22787 | gdb_assert (die != NULL); |
| 22788 | |
| 22789 | if (level >= max_level) |
| 22790 | return; |
| 22791 | |
| 22792 | dump_die_shallow (f, indent, die); |
| 22793 | |
| 22794 | if (die->child != NULL) |
| 22795 | { |
| 22796 | print_spaces (indent, f); |
| 22797 | fprintf_unfiltered (f, " Children:"); |
| 22798 | if (level + 1 < max_level) |
| 22799 | { |
| 22800 | fprintf_unfiltered (f, "\n"); |
| 22801 | dump_die_1 (f, level + 1, max_level, die->child); |
| 22802 | } |
| 22803 | else |
| 22804 | { |
| 22805 | fprintf_unfiltered (f, |
| 22806 | " [not printed, max nesting level reached]\n"); |
| 22807 | } |
| 22808 | } |
| 22809 | |
| 22810 | if (die->sibling != NULL && level > 0) |
| 22811 | { |
| 22812 | dump_die_1 (f, level, max_level, die->sibling); |
| 22813 | } |
| 22814 | } |
| 22815 | |
| 22816 | /* This is called from the pdie macro in gdbinit.in. |
| 22817 | It's not static so gcc will keep a copy callable from gdb. */ |
| 22818 | |
| 22819 | void |
| 22820 | dump_die (struct die_info *die, int max_level) |
| 22821 | { |
| 22822 | dump_die_1 (gdb_stdlog, 0, max_level, die); |
| 22823 | } |
| 22824 | |
| 22825 | static void |
| 22826 | store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu) |
| 22827 | { |
| 22828 | void **slot; |
| 22829 | |
| 22830 | slot = htab_find_slot_with_hash (cu->die_hash, die, |
| 22831 | to_underlying (die->sect_off), |
| 22832 | INSERT); |
| 22833 | |
| 22834 | *slot = die; |
| 22835 | } |
| 22836 | |
| 22837 | /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the |
| 22838 | required kind. */ |
| 22839 | |
| 22840 | static sect_offset |
| 22841 | dwarf2_get_ref_die_offset (const struct attribute *attr) |
| 22842 | { |
| 22843 | if (attr_form_is_ref (attr)) |
| 22844 | return (sect_offset) DW_UNSND (attr); |
| 22845 | |
| 22846 | complaint (&symfile_complaints, |
| 22847 | _("unsupported die ref attribute form: '%s'"), |
| 22848 | dwarf_form_name (attr->form)); |
| 22849 | return {}; |
| 22850 | } |
| 22851 | |
| 22852 | /* Return the constant value held by ATTR. Return DEFAULT_VALUE if |
| 22853 | * the value held by the attribute is not constant. */ |
| 22854 | |
| 22855 | static LONGEST |
| 22856 | dwarf2_get_attr_constant_value (const struct attribute *attr, int default_value) |
| 22857 | { |
| 22858 | if (attr->form == DW_FORM_sdata || attr->form == DW_FORM_implicit_const) |
| 22859 | return DW_SND (attr); |
| 22860 | else if (attr->form == DW_FORM_udata |
| 22861 | || attr->form == DW_FORM_data1 |
| 22862 | || attr->form == DW_FORM_data2 |
| 22863 | || attr->form == DW_FORM_data4 |
| 22864 | || attr->form == DW_FORM_data8) |
| 22865 | return DW_UNSND (attr); |
| 22866 | else |
| 22867 | { |
| 22868 | /* For DW_FORM_data16 see attr_form_is_constant. */ |
| 22869 | complaint (&symfile_complaints, |
| 22870 | _("Attribute value is not a constant (%s)"), |
| 22871 | dwarf_form_name (attr->form)); |
| 22872 | return default_value; |
| 22873 | } |
| 22874 | } |
| 22875 | |
| 22876 | /* Follow reference or signature attribute ATTR of SRC_DIE. |
| 22877 | On entry *REF_CU is the CU of SRC_DIE. |
| 22878 | On exit *REF_CU is the CU of the result. */ |
| 22879 | |
| 22880 | static struct die_info * |
| 22881 | follow_die_ref_or_sig (struct die_info *src_die, const struct attribute *attr, |
| 22882 | struct dwarf2_cu **ref_cu) |
| 22883 | { |
| 22884 | struct die_info *die; |
| 22885 | |
| 22886 | if (attr_form_is_ref (attr)) |
| 22887 | die = follow_die_ref (src_die, attr, ref_cu); |
| 22888 | else if (attr->form == DW_FORM_ref_sig8) |
| 22889 | die = follow_die_sig (src_die, attr, ref_cu); |
| 22890 | else |
| 22891 | { |
| 22892 | dump_die_for_error (src_die); |
| 22893 | error (_("Dwarf Error: Expected reference attribute [in module %s]"), |
| 22894 | objfile_name ((*ref_cu)->per_cu->dwarf2_per_objfile->objfile)); |
| 22895 | } |
| 22896 | |
| 22897 | return die; |
| 22898 | } |
| 22899 | |
| 22900 | /* Follow reference OFFSET. |
| 22901 | On entry *REF_CU is the CU of the source die referencing OFFSET. |
| 22902 | On exit *REF_CU is the CU of the result. |
| 22903 | Returns NULL if OFFSET is invalid. */ |
| 22904 | |
| 22905 | static struct die_info * |
| 22906 | follow_die_offset (sect_offset sect_off, int offset_in_dwz, |
| 22907 | struct dwarf2_cu **ref_cu) |
| 22908 | { |
| 22909 | struct die_info temp_die; |
| 22910 | struct dwarf2_cu *target_cu, *cu = *ref_cu; |
| 22911 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 22912 | = cu->per_cu->dwarf2_per_objfile; |
| 22913 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 22914 | |
| 22915 | gdb_assert (cu->per_cu != NULL); |
| 22916 | |
| 22917 | target_cu = cu; |
| 22918 | |
| 22919 | if (cu->per_cu->is_debug_types) |
| 22920 | { |
| 22921 | /* .debug_types CUs cannot reference anything outside their CU. |
| 22922 | If they need to, they have to reference a signatured type via |
| 22923 | DW_FORM_ref_sig8. */ |
| 22924 | if (!offset_in_cu_p (&cu->header, sect_off)) |
| 22925 | return NULL; |
| 22926 | } |
| 22927 | else if (offset_in_dwz != cu->per_cu->is_dwz |
| 22928 | || !offset_in_cu_p (&cu->header, sect_off)) |
| 22929 | { |
| 22930 | struct dwarf2_per_cu_data *per_cu; |
| 22931 | |
| 22932 | per_cu = dwarf2_find_containing_comp_unit (sect_off, offset_in_dwz, |
| 22933 | dwarf2_per_objfile); |
| 22934 | |
| 22935 | /* If necessary, add it to the queue and load its DIEs. */ |
| 22936 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
| 22937 | load_full_comp_unit (per_cu, cu->language); |
| 22938 | |
| 22939 | target_cu = per_cu->cu; |
| 22940 | } |
| 22941 | else if (cu->dies == NULL) |
| 22942 | { |
| 22943 | /* We're loading full DIEs during partial symbol reading. */ |
| 22944 | gdb_assert (dwarf2_per_objfile->reading_partial_symbols); |
| 22945 | load_full_comp_unit (cu->per_cu, language_minimal); |
| 22946 | } |
| 22947 | |
| 22948 | *ref_cu = target_cu; |
| 22949 | temp_die.sect_off = sect_off; |
| 22950 | return (struct die_info *) htab_find_with_hash (target_cu->die_hash, |
| 22951 | &temp_die, |
| 22952 | to_underlying (sect_off)); |
| 22953 | } |
| 22954 | |
| 22955 | /* Follow reference attribute ATTR of SRC_DIE. |
| 22956 | On entry *REF_CU is the CU of SRC_DIE. |
| 22957 | On exit *REF_CU is the CU of the result. */ |
| 22958 | |
| 22959 | static struct die_info * |
| 22960 | follow_die_ref (struct die_info *src_die, const struct attribute *attr, |
| 22961 | struct dwarf2_cu **ref_cu) |
| 22962 | { |
| 22963 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
| 22964 | struct dwarf2_cu *cu = *ref_cu; |
| 22965 | struct die_info *die; |
| 22966 | |
| 22967 | die = follow_die_offset (sect_off, |
| 22968 | (attr->form == DW_FORM_GNU_ref_alt |
| 22969 | || cu->per_cu->is_dwz), |
| 22970 | ref_cu); |
| 22971 | if (!die) |
| 22972 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE " |
| 22973 | "at 0x%x [in module %s]"), |
| 22974 | to_underlying (sect_off), to_underlying (src_die->sect_off), |
| 22975 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
| 22976 | |
| 22977 | return die; |
| 22978 | } |
| 22979 | |
| 22980 | /* Return DWARF block referenced by DW_AT_location of DIE at SECT_OFF at PER_CU. |
| 22981 | Returned value is intended for DW_OP_call*. Returned |
| 22982 | dwarf2_locexpr_baton->data has lifetime of |
| 22983 | PER_CU->DWARF2_PER_OBJFILE->OBJFILE. */ |
| 22984 | |
| 22985 | struct dwarf2_locexpr_baton |
| 22986 | dwarf2_fetch_die_loc_sect_off (sect_offset sect_off, |
| 22987 | struct dwarf2_per_cu_data *per_cu, |
| 22988 | CORE_ADDR (*get_frame_pc) (void *baton), |
| 22989 | void *baton) |
| 22990 | { |
| 22991 | struct dwarf2_cu *cu; |
| 22992 | struct die_info *die; |
| 22993 | struct attribute *attr; |
| 22994 | struct dwarf2_locexpr_baton retval; |
| 22995 | struct objfile *objfile = per_cu->dwarf2_per_objfile->objfile; |
| 22996 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 22997 | = get_dwarf2_per_objfile (objfile); |
| 22998 | |
| 22999 | if (per_cu->cu == NULL) |
| 23000 | load_cu (per_cu); |
| 23001 | cu = per_cu->cu; |
| 23002 | if (cu == NULL) |
| 23003 | { |
| 23004 | /* We shouldn't get here for a dummy CU, but don't crash on the user. |
| 23005 | Instead just throw an error, not much else we can do. */ |
| 23006 | error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"), |
| 23007 | to_underlying (sect_off), objfile_name (objfile)); |
| 23008 | } |
| 23009 | |
| 23010 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
| 23011 | if (!die) |
| 23012 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"), |
| 23013 | to_underlying (sect_off), objfile_name (objfile)); |
| 23014 | |
| 23015 | attr = dwarf2_attr (die, DW_AT_location, cu); |
| 23016 | if (!attr) |
| 23017 | { |
| 23018 | /* DWARF: "If there is no such attribute, then there is no effect.". |
| 23019 | DATA is ignored if SIZE is 0. */ |
| 23020 | |
| 23021 | retval.data = NULL; |
| 23022 | retval.size = 0; |
| 23023 | } |
| 23024 | else if (attr_form_is_section_offset (attr)) |
| 23025 | { |
| 23026 | struct dwarf2_loclist_baton loclist_baton; |
| 23027 | CORE_ADDR pc = (*get_frame_pc) (baton); |
| 23028 | size_t size; |
| 23029 | |
| 23030 | fill_in_loclist_baton (cu, &loclist_baton, attr); |
| 23031 | |
| 23032 | retval.data = dwarf2_find_location_expression (&loclist_baton, |
| 23033 | &size, pc); |
| 23034 | retval.size = size; |
| 23035 | } |
| 23036 | else |
| 23037 | { |
| 23038 | if (!attr_form_is_block (attr)) |
| 23039 | error (_("Dwarf Error: DIE at 0x%x referenced in module %s " |
| 23040 | "is neither DW_FORM_block* nor DW_FORM_exprloc"), |
| 23041 | to_underlying (sect_off), objfile_name (objfile)); |
| 23042 | |
| 23043 | retval.data = DW_BLOCK (attr)->data; |
| 23044 | retval.size = DW_BLOCK (attr)->size; |
| 23045 | } |
| 23046 | retval.per_cu = cu->per_cu; |
| 23047 | |
| 23048 | age_cached_comp_units (dwarf2_per_objfile); |
| 23049 | |
| 23050 | return retval; |
| 23051 | } |
| 23052 | |
| 23053 | /* Like dwarf2_fetch_die_loc_sect_off, but take a CU |
| 23054 | offset. */ |
| 23055 | |
| 23056 | struct dwarf2_locexpr_baton |
| 23057 | dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu, |
| 23058 | struct dwarf2_per_cu_data *per_cu, |
| 23059 | CORE_ADDR (*get_frame_pc) (void *baton), |
| 23060 | void *baton) |
| 23061 | { |
| 23062 | sect_offset sect_off = per_cu->sect_off + to_underlying (offset_in_cu); |
| 23063 | |
| 23064 | return dwarf2_fetch_die_loc_sect_off (sect_off, per_cu, get_frame_pc, baton); |
| 23065 | } |
| 23066 | |
| 23067 | /* Write a constant of a given type as target-ordered bytes into |
| 23068 | OBSTACK. */ |
| 23069 | |
| 23070 | static const gdb_byte * |
| 23071 | write_constant_as_bytes (struct obstack *obstack, |
| 23072 | enum bfd_endian byte_order, |
| 23073 | struct type *type, |
| 23074 | ULONGEST value, |
| 23075 | LONGEST *len) |
| 23076 | { |
| 23077 | gdb_byte *result; |
| 23078 | |
| 23079 | *len = TYPE_LENGTH (type); |
| 23080 | result = (gdb_byte *) obstack_alloc (obstack, *len); |
| 23081 | store_unsigned_integer (result, *len, byte_order, value); |
| 23082 | |
| 23083 | return result; |
| 23084 | } |
| 23085 | |
| 23086 | /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a |
| 23087 | pointer to the constant bytes and set LEN to the length of the |
| 23088 | data. If memory is needed, allocate it on OBSTACK. If the DIE |
| 23089 | does not have a DW_AT_const_value, return NULL. */ |
| 23090 | |
| 23091 | const gdb_byte * |
| 23092 | dwarf2_fetch_constant_bytes (sect_offset sect_off, |
| 23093 | struct dwarf2_per_cu_data *per_cu, |
| 23094 | struct obstack *obstack, |
| 23095 | LONGEST *len) |
| 23096 | { |
| 23097 | struct dwarf2_cu *cu; |
| 23098 | struct die_info *die; |
| 23099 | struct attribute *attr; |
| 23100 | const gdb_byte *result = NULL; |
| 23101 | struct type *type; |
| 23102 | LONGEST value; |
| 23103 | enum bfd_endian byte_order; |
| 23104 | struct objfile *objfile = per_cu->dwarf2_per_objfile->objfile; |
| 23105 | |
| 23106 | if (per_cu->cu == NULL) |
| 23107 | load_cu (per_cu); |
| 23108 | cu = per_cu->cu; |
| 23109 | if (cu == NULL) |
| 23110 | { |
| 23111 | /* We shouldn't get here for a dummy CU, but don't crash on the user. |
| 23112 | Instead just throw an error, not much else we can do. */ |
| 23113 | error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"), |
| 23114 | to_underlying (sect_off), objfile_name (objfile)); |
| 23115 | } |
| 23116 | |
| 23117 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
| 23118 | if (!die) |
| 23119 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"), |
| 23120 | to_underlying (sect_off), objfile_name (objfile)); |
| 23121 | |
| 23122 | |
| 23123 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
| 23124 | if (attr == NULL) |
| 23125 | return NULL; |
| 23126 | |
| 23127 | byte_order = (bfd_big_endian (objfile->obfd) |
| 23128 | ? BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); |
| 23129 | |
| 23130 | switch (attr->form) |
| 23131 | { |
| 23132 | case DW_FORM_addr: |
| 23133 | case DW_FORM_GNU_addr_index: |
| 23134 | { |
| 23135 | gdb_byte *tem; |
| 23136 | |
| 23137 | *len = cu->header.addr_size; |
| 23138 | tem = (gdb_byte *) obstack_alloc (obstack, *len); |
| 23139 | store_unsigned_integer (tem, *len, byte_order, DW_ADDR (attr)); |
| 23140 | result = tem; |
| 23141 | } |
| 23142 | break; |
| 23143 | case DW_FORM_string: |
| 23144 | case DW_FORM_strp: |
| 23145 | case DW_FORM_GNU_str_index: |
| 23146 | case DW_FORM_GNU_strp_alt: |
| 23147 | /* DW_STRING is already allocated on the objfile obstack, point |
| 23148 | directly to it. */ |
| 23149 | result = (const gdb_byte *) DW_STRING (attr); |
| 23150 | *len = strlen (DW_STRING (attr)); |
| 23151 | break; |
| 23152 | case DW_FORM_block1: |
| 23153 | case DW_FORM_block2: |
| 23154 | case DW_FORM_block4: |
| 23155 | case DW_FORM_block: |
| 23156 | case DW_FORM_exprloc: |
| 23157 | case DW_FORM_data16: |
| 23158 | result = DW_BLOCK (attr)->data; |
| 23159 | *len = DW_BLOCK (attr)->size; |
| 23160 | break; |
| 23161 | |
| 23162 | /* The DW_AT_const_value attributes are supposed to carry the |
| 23163 | symbol's value "represented as it would be on the target |
| 23164 | architecture." By the time we get here, it's already been |
| 23165 | converted to host endianness, so we just need to sign- or |
| 23166 | zero-extend it as appropriate. */ |
| 23167 | case DW_FORM_data1: |
| 23168 | type = die_type (die, cu); |
| 23169 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 8); |
| 23170 | if (result == NULL) |
| 23171 | result = write_constant_as_bytes (obstack, byte_order, |
| 23172 | type, value, len); |
| 23173 | break; |
| 23174 | case DW_FORM_data2: |
| 23175 | type = die_type (die, cu); |
| 23176 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 16); |
| 23177 | if (result == NULL) |
| 23178 | result = write_constant_as_bytes (obstack, byte_order, |
| 23179 | type, value, len); |
| 23180 | break; |
| 23181 | case DW_FORM_data4: |
| 23182 | type = die_type (die, cu); |
| 23183 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 32); |
| 23184 | if (result == NULL) |
| 23185 | result = write_constant_as_bytes (obstack, byte_order, |
| 23186 | type, value, len); |
| 23187 | break; |
| 23188 | case DW_FORM_data8: |
| 23189 | type = die_type (die, cu); |
| 23190 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 64); |
| 23191 | if (result == NULL) |
| 23192 | result = write_constant_as_bytes (obstack, byte_order, |
| 23193 | type, value, len); |
| 23194 | break; |
| 23195 | |
| 23196 | case DW_FORM_sdata: |
| 23197 | case DW_FORM_implicit_const: |
| 23198 | type = die_type (die, cu); |
| 23199 | result = write_constant_as_bytes (obstack, byte_order, |
| 23200 | type, DW_SND (attr), len); |
| 23201 | break; |
| 23202 | |
| 23203 | case DW_FORM_udata: |
| 23204 | type = die_type (die, cu); |
| 23205 | result = write_constant_as_bytes (obstack, byte_order, |
| 23206 | type, DW_UNSND (attr), len); |
| 23207 | break; |
| 23208 | |
| 23209 | default: |
| 23210 | complaint (&symfile_complaints, |
| 23211 | _("unsupported const value attribute form: '%s'"), |
| 23212 | dwarf_form_name (attr->form)); |
| 23213 | break; |
| 23214 | } |
| 23215 | |
| 23216 | return result; |
| 23217 | } |
| 23218 | |
| 23219 | /* Return the type of the die at OFFSET in PER_CU. Return NULL if no |
| 23220 | valid type for this die is found. */ |
| 23221 | |
| 23222 | struct type * |
| 23223 | dwarf2_fetch_die_type_sect_off (sect_offset sect_off, |
| 23224 | struct dwarf2_per_cu_data *per_cu) |
| 23225 | { |
| 23226 | struct dwarf2_cu *cu; |
| 23227 | struct die_info *die; |
| 23228 | |
| 23229 | if (per_cu->cu == NULL) |
| 23230 | load_cu (per_cu); |
| 23231 | cu = per_cu->cu; |
| 23232 | if (!cu) |
| 23233 | return NULL; |
| 23234 | |
| 23235 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
| 23236 | if (!die) |
| 23237 | return NULL; |
| 23238 | |
| 23239 | return die_type (die, cu); |
| 23240 | } |
| 23241 | |
| 23242 | /* Return the type of the DIE at DIE_OFFSET in the CU named by |
| 23243 | PER_CU. */ |
| 23244 | |
| 23245 | struct type * |
| 23246 | dwarf2_get_die_type (cu_offset die_offset, |
| 23247 | struct dwarf2_per_cu_data *per_cu) |
| 23248 | { |
| 23249 | sect_offset die_offset_sect = per_cu->sect_off + to_underlying (die_offset); |
| 23250 | return get_die_type_at_offset (die_offset_sect, per_cu); |
| 23251 | } |
| 23252 | |
| 23253 | /* Follow type unit SIG_TYPE referenced by SRC_DIE. |
| 23254 | On entry *REF_CU is the CU of SRC_DIE. |
| 23255 | On exit *REF_CU is the CU of the result. |
| 23256 | Returns NULL if the referenced DIE isn't found. */ |
| 23257 | |
| 23258 | static struct die_info * |
| 23259 | follow_die_sig_1 (struct die_info *src_die, struct signatured_type *sig_type, |
| 23260 | struct dwarf2_cu **ref_cu) |
| 23261 | { |
| 23262 | struct die_info temp_die; |
| 23263 | struct dwarf2_cu *sig_cu; |
| 23264 | struct die_info *die; |
| 23265 | |
| 23266 | /* While it might be nice to assert sig_type->type == NULL here, |
| 23267 | we can get here for DW_AT_imported_declaration where we need |
| 23268 | the DIE not the type. */ |
| 23269 | |
| 23270 | /* If necessary, add it to the queue and load its DIEs. */ |
| 23271 | |
| 23272 | if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu, language_minimal)) |
| 23273 | read_signatured_type (sig_type); |
| 23274 | |
| 23275 | sig_cu = sig_type->per_cu.cu; |
| 23276 | gdb_assert (sig_cu != NULL); |
| 23277 | gdb_assert (to_underlying (sig_type->type_offset_in_section) != 0); |
| 23278 | temp_die.sect_off = sig_type->type_offset_in_section; |
| 23279 | die = (struct die_info *) htab_find_with_hash (sig_cu->die_hash, &temp_die, |
| 23280 | to_underlying (temp_die.sect_off)); |
| 23281 | if (die) |
| 23282 | { |
| 23283 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 23284 | = (*ref_cu)->per_cu->dwarf2_per_objfile; |
| 23285 | |
| 23286 | /* For .gdb_index version 7 keep track of included TUs. |
| 23287 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */ |
| 23288 | if (dwarf2_per_objfile->index_table != NULL |
| 23289 | && dwarf2_per_objfile->index_table->version <= 7) |
| 23290 | { |
| 23291 | VEC_safe_push (dwarf2_per_cu_ptr, |
| 23292 | (*ref_cu)->per_cu->imported_symtabs, |
| 23293 | sig_cu->per_cu); |
| 23294 | } |
| 23295 | |
| 23296 | *ref_cu = sig_cu; |
| 23297 | return die; |
| 23298 | } |
| 23299 | |
| 23300 | return NULL; |
| 23301 | } |
| 23302 | |
| 23303 | /* Follow signatured type referenced by ATTR in SRC_DIE. |
| 23304 | On entry *REF_CU is the CU of SRC_DIE. |
| 23305 | On exit *REF_CU is the CU of the result. |
| 23306 | The result is the DIE of the type. |
| 23307 | If the referenced type cannot be found an error is thrown. */ |
| 23308 | |
| 23309 | static struct die_info * |
| 23310 | follow_die_sig (struct die_info *src_die, const struct attribute *attr, |
| 23311 | struct dwarf2_cu **ref_cu) |
| 23312 | { |
| 23313 | ULONGEST signature = DW_SIGNATURE (attr); |
| 23314 | struct signatured_type *sig_type; |
| 23315 | struct die_info *die; |
| 23316 | |
| 23317 | gdb_assert (attr->form == DW_FORM_ref_sig8); |
| 23318 | |
| 23319 | sig_type = lookup_signatured_type (*ref_cu, signature); |
| 23320 | /* sig_type will be NULL if the signatured type is missing from |
| 23321 | the debug info. */ |
| 23322 | if (sig_type == NULL) |
| 23323 | { |
| 23324 | error (_("Dwarf Error: Cannot find signatured DIE %s referenced" |
| 23325 | " from DIE at 0x%x [in module %s]"), |
| 23326 | hex_string (signature), to_underlying (src_die->sect_off), |
| 23327 | objfile_name ((*ref_cu)->per_cu->dwarf2_per_objfile->objfile)); |
| 23328 | } |
| 23329 | |
| 23330 | die = follow_die_sig_1 (src_die, sig_type, ref_cu); |
| 23331 | if (die == NULL) |
| 23332 | { |
| 23333 | dump_die_for_error (src_die); |
| 23334 | error (_("Dwarf Error: Problem reading signatured DIE %s referenced" |
| 23335 | " from DIE at 0x%x [in module %s]"), |
| 23336 | hex_string (signature), to_underlying (src_die->sect_off), |
| 23337 | objfile_name ((*ref_cu)->per_cu->dwarf2_per_objfile->objfile)); |
| 23338 | } |
| 23339 | |
| 23340 | return die; |
| 23341 | } |
| 23342 | |
| 23343 | /* Get the type specified by SIGNATURE referenced in DIE/CU, |
| 23344 | reading in and processing the type unit if necessary. */ |
| 23345 | |
| 23346 | static struct type * |
| 23347 | get_signatured_type (struct die_info *die, ULONGEST signature, |
| 23348 | struct dwarf2_cu *cu) |
| 23349 | { |
| 23350 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 23351 | = cu->per_cu->dwarf2_per_objfile; |
| 23352 | struct signatured_type *sig_type; |
| 23353 | struct dwarf2_cu *type_cu; |
| 23354 | struct die_info *type_die; |
| 23355 | struct type *type; |
| 23356 | |
| 23357 | sig_type = lookup_signatured_type (cu, signature); |
| 23358 | /* sig_type will be NULL if the signatured type is missing from |
| 23359 | the debug info. */ |
| 23360 | if (sig_type == NULL) |
| 23361 | { |
| 23362 | complaint (&symfile_complaints, |
| 23363 | _("Dwarf Error: Cannot find signatured DIE %s referenced" |
| 23364 | " from DIE at 0x%x [in module %s]"), |
| 23365 | hex_string (signature), to_underlying (die->sect_off), |
| 23366 | objfile_name (dwarf2_per_objfile->objfile)); |
| 23367 | return build_error_marker_type (cu, die); |
| 23368 | } |
| 23369 | |
| 23370 | /* If we already know the type we're done. */ |
| 23371 | if (sig_type->type != NULL) |
| 23372 | return sig_type->type; |
| 23373 | |
| 23374 | type_cu = cu; |
| 23375 | type_die = follow_die_sig_1 (die, sig_type, &type_cu); |
| 23376 | if (type_die != NULL) |
| 23377 | { |
| 23378 | /* N.B. We need to call get_die_type to ensure only one type for this DIE |
| 23379 | is created. This is important, for example, because for c++ classes |
| 23380 | we need TYPE_NAME set which is only done by new_symbol. Blech. */ |
| 23381 | type = read_type_die (type_die, type_cu); |
| 23382 | if (type == NULL) |
| 23383 | { |
| 23384 | complaint (&symfile_complaints, |
| 23385 | _("Dwarf Error: Cannot build signatured type %s" |
| 23386 | " referenced from DIE at 0x%x [in module %s]"), |
| 23387 | hex_string (signature), to_underlying (die->sect_off), |
| 23388 | objfile_name (dwarf2_per_objfile->objfile)); |
| 23389 | type = build_error_marker_type (cu, die); |
| 23390 | } |
| 23391 | } |
| 23392 | else |
| 23393 | { |
| 23394 | complaint (&symfile_complaints, |
| 23395 | _("Dwarf Error: Problem reading signatured DIE %s referenced" |
| 23396 | " from DIE at 0x%x [in module %s]"), |
| 23397 | hex_string (signature), to_underlying (die->sect_off), |
| 23398 | objfile_name (dwarf2_per_objfile->objfile)); |
| 23399 | type = build_error_marker_type (cu, die); |
| 23400 | } |
| 23401 | sig_type->type = type; |
| 23402 | |
| 23403 | return type; |
| 23404 | } |
| 23405 | |
| 23406 | /* Get the type specified by the DW_AT_signature ATTR in DIE/CU, |
| 23407 | reading in and processing the type unit if necessary. */ |
| 23408 | |
| 23409 | static struct type * |
| 23410 | get_DW_AT_signature_type (struct die_info *die, const struct attribute *attr, |
| 23411 | struct dwarf2_cu *cu) /* ARI: editCase function */ |
| 23412 | { |
| 23413 | /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */ |
| 23414 | if (attr_form_is_ref (attr)) |
| 23415 | { |
| 23416 | struct dwarf2_cu *type_cu = cu; |
| 23417 | struct die_info *type_die = follow_die_ref (die, attr, &type_cu); |
| 23418 | |
| 23419 | return read_type_die (type_die, type_cu); |
| 23420 | } |
| 23421 | else if (attr->form == DW_FORM_ref_sig8) |
| 23422 | { |
| 23423 | return get_signatured_type (die, DW_SIGNATURE (attr), cu); |
| 23424 | } |
| 23425 | else |
| 23426 | { |
| 23427 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 23428 | = cu->per_cu->dwarf2_per_objfile; |
| 23429 | |
| 23430 | complaint (&symfile_complaints, |
| 23431 | _("Dwarf Error: DW_AT_signature has bad form %s in DIE" |
| 23432 | " at 0x%x [in module %s]"), |
| 23433 | dwarf_form_name (attr->form), to_underlying (die->sect_off), |
| 23434 | objfile_name (dwarf2_per_objfile->objfile)); |
| 23435 | return build_error_marker_type (cu, die); |
| 23436 | } |
| 23437 | } |
| 23438 | |
| 23439 | /* Load the DIEs associated with type unit PER_CU into memory. */ |
| 23440 | |
| 23441 | static void |
| 23442 | load_full_type_unit (struct dwarf2_per_cu_data *per_cu) |
| 23443 | { |
| 23444 | struct signatured_type *sig_type; |
| 23445 | |
| 23446 | /* Caller is responsible for ensuring type_unit_groups don't get here. */ |
| 23447 | gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu)); |
| 23448 | |
| 23449 | /* We have the per_cu, but we need the signatured_type. |
| 23450 | Fortunately this is an easy translation. */ |
| 23451 | gdb_assert (per_cu->is_debug_types); |
| 23452 | sig_type = (struct signatured_type *) per_cu; |
| 23453 | |
| 23454 | gdb_assert (per_cu->cu == NULL); |
| 23455 | |
| 23456 | read_signatured_type (sig_type); |
| 23457 | |
| 23458 | gdb_assert (per_cu->cu != NULL); |
| 23459 | } |
| 23460 | |
| 23461 | /* die_reader_func for read_signatured_type. |
| 23462 | This is identical to load_full_comp_unit_reader, |
| 23463 | but is kept separate for now. */ |
| 23464 | |
| 23465 | static void |
| 23466 | read_signatured_type_reader (const struct die_reader_specs *reader, |
| 23467 | const gdb_byte *info_ptr, |
| 23468 | struct die_info *comp_unit_die, |
| 23469 | int has_children, |
| 23470 | void *data) |
| 23471 | { |
| 23472 | struct dwarf2_cu *cu = reader->cu; |
| 23473 | |
| 23474 | gdb_assert (cu->die_hash == NULL); |
| 23475 | cu->die_hash = |
| 23476 | htab_create_alloc_ex (cu->header.length / 12, |
| 23477 | die_hash, |
| 23478 | die_eq, |
| 23479 | NULL, |
| 23480 | &cu->comp_unit_obstack, |
| 23481 | hashtab_obstack_allocate, |
| 23482 | dummy_obstack_deallocate); |
| 23483 | |
| 23484 | if (has_children) |
| 23485 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, |
| 23486 | &info_ptr, comp_unit_die); |
| 23487 | cu->dies = comp_unit_die; |
| 23488 | /* comp_unit_die is not stored in die_hash, no need. */ |
| 23489 | |
| 23490 | /* We try not to read any attributes in this function, because not |
| 23491 | all CUs needed for references have been loaded yet, and symbol |
| 23492 | table processing isn't initialized. But we have to set the CU language, |
| 23493 | or we won't be able to build types correctly. |
| 23494 | Similarly, if we do not read the producer, we can not apply |
| 23495 | producer-specific interpretation. */ |
| 23496 | prepare_one_comp_unit (cu, cu->dies, language_minimal); |
| 23497 | } |
| 23498 | |
| 23499 | /* Read in a signatured type and build its CU and DIEs. |
| 23500 | If the type is a stub for the real type in a DWO file, |
| 23501 | read in the real type from the DWO file as well. */ |
| 23502 | |
| 23503 | static void |
| 23504 | read_signatured_type (struct signatured_type *sig_type) |
| 23505 | { |
| 23506 | struct dwarf2_per_cu_data *per_cu = &sig_type->per_cu; |
| 23507 | |
| 23508 | gdb_assert (per_cu->is_debug_types); |
| 23509 | gdb_assert (per_cu->cu == NULL); |
| 23510 | |
| 23511 | init_cutu_and_read_dies (per_cu, NULL, 0, 1, |
| 23512 | read_signatured_type_reader, NULL); |
| 23513 | sig_type->per_cu.tu_read = 1; |
| 23514 | } |
| 23515 | |
| 23516 | /* Decode simple location descriptions. |
| 23517 | Given a pointer to a dwarf block that defines a location, compute |
| 23518 | the location and return the value. |
| 23519 | |
| 23520 | NOTE drow/2003-11-18: This function is called in two situations |
| 23521 | now: for the address of static or global variables (partial symbols |
| 23522 | only) and for offsets into structures which are expected to be |
| 23523 | (more or less) constant. The partial symbol case should go away, |
| 23524 | and only the constant case should remain. That will let this |
| 23525 | function complain more accurately. A few special modes are allowed |
| 23526 | without complaint for global variables (for instance, global |
| 23527 | register values and thread-local values). |
| 23528 | |
| 23529 | A location description containing no operations indicates that the |
| 23530 | object is optimized out. The return value is 0 for that case. |
| 23531 | FIXME drow/2003-11-16: No callers check for this case any more; soon all |
| 23532 | callers will only want a very basic result and this can become a |
| 23533 | complaint. |
| 23534 | |
| 23535 | Note that stack[0] is unused except as a default error return. */ |
| 23536 | |
| 23537 | static CORE_ADDR |
| 23538 | decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu) |
| 23539 | { |
| 23540 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
| 23541 | size_t i; |
| 23542 | size_t size = blk->size; |
| 23543 | const gdb_byte *data = blk->data; |
| 23544 | CORE_ADDR stack[64]; |
| 23545 | int stacki; |
| 23546 | unsigned int bytes_read, unsnd; |
| 23547 | gdb_byte op; |
| 23548 | |
| 23549 | i = 0; |
| 23550 | stacki = 0; |
| 23551 | stack[stacki] = 0; |
| 23552 | stack[++stacki] = 0; |
| 23553 | |
| 23554 | while (i < size) |
| 23555 | { |
| 23556 | op = data[i++]; |
| 23557 | switch (op) |
| 23558 | { |
| 23559 | case DW_OP_lit0: |
| 23560 | case DW_OP_lit1: |
| 23561 | case DW_OP_lit2: |
| 23562 | case DW_OP_lit3: |
| 23563 | case DW_OP_lit4: |
| 23564 | case DW_OP_lit5: |
| 23565 | case DW_OP_lit6: |
| 23566 | case DW_OP_lit7: |
| 23567 | case DW_OP_lit8: |
| 23568 | case DW_OP_lit9: |
| 23569 | case DW_OP_lit10: |
| 23570 | case DW_OP_lit11: |
| 23571 | case DW_OP_lit12: |
| 23572 | case DW_OP_lit13: |
| 23573 | case DW_OP_lit14: |
| 23574 | case DW_OP_lit15: |
| 23575 | case DW_OP_lit16: |
| 23576 | case DW_OP_lit17: |
| 23577 | case DW_OP_lit18: |
| 23578 | case DW_OP_lit19: |
| 23579 | case DW_OP_lit20: |
| 23580 | case DW_OP_lit21: |
| 23581 | case DW_OP_lit22: |
| 23582 | case DW_OP_lit23: |
| 23583 | case DW_OP_lit24: |
| 23584 | case DW_OP_lit25: |
| 23585 | case DW_OP_lit26: |
| 23586 | case DW_OP_lit27: |
| 23587 | case DW_OP_lit28: |
| 23588 | case DW_OP_lit29: |
| 23589 | case DW_OP_lit30: |
| 23590 | case DW_OP_lit31: |
| 23591 | stack[++stacki] = op - DW_OP_lit0; |
| 23592 | break; |
| 23593 | |
| 23594 | case DW_OP_reg0: |
| 23595 | case DW_OP_reg1: |
| 23596 | case DW_OP_reg2: |
| 23597 | case DW_OP_reg3: |
| 23598 | case DW_OP_reg4: |
| 23599 | case DW_OP_reg5: |
| 23600 | case DW_OP_reg6: |
| 23601 | case DW_OP_reg7: |
| 23602 | case DW_OP_reg8: |
| 23603 | case DW_OP_reg9: |
| 23604 | case DW_OP_reg10: |
| 23605 | case DW_OP_reg11: |
| 23606 | case DW_OP_reg12: |
| 23607 | case DW_OP_reg13: |
| 23608 | case DW_OP_reg14: |
| 23609 | case DW_OP_reg15: |
| 23610 | case DW_OP_reg16: |
| 23611 | case DW_OP_reg17: |
| 23612 | case DW_OP_reg18: |
| 23613 | case DW_OP_reg19: |
| 23614 | case DW_OP_reg20: |
| 23615 | case DW_OP_reg21: |
| 23616 | case DW_OP_reg22: |
| 23617 | case DW_OP_reg23: |
| 23618 | case DW_OP_reg24: |
| 23619 | case DW_OP_reg25: |
| 23620 | case DW_OP_reg26: |
| 23621 | case DW_OP_reg27: |
| 23622 | case DW_OP_reg28: |
| 23623 | case DW_OP_reg29: |
| 23624 | case DW_OP_reg30: |
| 23625 | case DW_OP_reg31: |
| 23626 | stack[++stacki] = op - DW_OP_reg0; |
| 23627 | if (i < size) |
| 23628 | dwarf2_complex_location_expr_complaint (); |
| 23629 | break; |
| 23630 | |
| 23631 | case DW_OP_regx: |
| 23632 | unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read); |
| 23633 | i += bytes_read; |
| 23634 | stack[++stacki] = unsnd; |
| 23635 | if (i < size) |
| 23636 | dwarf2_complex_location_expr_complaint (); |
| 23637 | break; |
| 23638 | |
| 23639 | case DW_OP_addr: |
| 23640 | stack[++stacki] = read_address (objfile->obfd, &data[i], |
| 23641 | cu, &bytes_read); |
| 23642 | i += bytes_read; |
| 23643 | break; |
| 23644 | |
| 23645 | case DW_OP_const1u: |
| 23646 | stack[++stacki] = read_1_byte (objfile->obfd, &data[i]); |
| 23647 | i += 1; |
| 23648 | break; |
| 23649 | |
| 23650 | case DW_OP_const1s: |
| 23651 | stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]); |
| 23652 | i += 1; |
| 23653 | break; |
| 23654 | |
| 23655 | case DW_OP_const2u: |
| 23656 | stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]); |
| 23657 | i += 2; |
| 23658 | break; |
| 23659 | |
| 23660 | case DW_OP_const2s: |
| 23661 | stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]); |
| 23662 | i += 2; |
| 23663 | break; |
| 23664 | |
| 23665 | case DW_OP_const4u: |
| 23666 | stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]); |
| 23667 | i += 4; |
| 23668 | break; |
| 23669 | |
| 23670 | case DW_OP_const4s: |
| 23671 | stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]); |
| 23672 | i += 4; |
| 23673 | break; |
| 23674 | |
| 23675 | case DW_OP_const8u: |
| 23676 | stack[++stacki] = read_8_bytes (objfile->obfd, &data[i]); |
| 23677 | i += 8; |
| 23678 | break; |
| 23679 | |
| 23680 | case DW_OP_constu: |
| 23681 | stack[++stacki] = read_unsigned_leb128 (NULL, (data + i), |
| 23682 | &bytes_read); |
| 23683 | i += bytes_read; |
| 23684 | break; |
| 23685 | |
| 23686 | case DW_OP_consts: |
| 23687 | stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read); |
| 23688 | i += bytes_read; |
| 23689 | break; |
| 23690 | |
| 23691 | case DW_OP_dup: |
| 23692 | stack[stacki + 1] = stack[stacki]; |
| 23693 | stacki++; |
| 23694 | break; |
| 23695 | |
| 23696 | case DW_OP_plus: |
| 23697 | stack[stacki - 1] += stack[stacki]; |
| 23698 | stacki--; |
| 23699 | break; |
| 23700 | |
| 23701 | case DW_OP_plus_uconst: |
| 23702 | stack[stacki] += read_unsigned_leb128 (NULL, (data + i), |
| 23703 | &bytes_read); |
| 23704 | i += bytes_read; |
| 23705 | break; |
| 23706 | |
| 23707 | case DW_OP_minus: |
| 23708 | stack[stacki - 1] -= stack[stacki]; |
| 23709 | stacki--; |
| 23710 | break; |
| 23711 | |
| 23712 | case DW_OP_deref: |
| 23713 | /* If we're not the last op, then we definitely can't encode |
| 23714 | this using GDB's address_class enum. This is valid for partial |
| 23715 | global symbols, although the variable's address will be bogus |
| 23716 | in the psymtab. */ |
| 23717 | if (i < size) |
| 23718 | dwarf2_complex_location_expr_complaint (); |
| 23719 | break; |
| 23720 | |
| 23721 | case DW_OP_GNU_push_tls_address: |
| 23722 | case DW_OP_form_tls_address: |
| 23723 | /* The top of the stack has the offset from the beginning |
| 23724 | of the thread control block at which the variable is located. */ |
| 23725 | /* Nothing should follow this operator, so the top of stack would |
| 23726 | be returned. */ |
| 23727 | /* This is valid for partial global symbols, but the variable's |
| 23728 | address will be bogus in the psymtab. Make it always at least |
| 23729 | non-zero to not look as a variable garbage collected by linker |
| 23730 | which have DW_OP_addr 0. */ |
| 23731 | if (i < size) |
| 23732 | dwarf2_complex_location_expr_complaint (); |
| 23733 | stack[stacki]++; |
| 23734 | break; |
| 23735 | |
| 23736 | case DW_OP_GNU_uninit: |
| 23737 | break; |
| 23738 | |
| 23739 | case DW_OP_GNU_addr_index: |
| 23740 | case DW_OP_GNU_const_index: |
| 23741 | stack[++stacki] = read_addr_index_from_leb128 (cu, &data[i], |
| 23742 | &bytes_read); |
| 23743 | i += bytes_read; |
| 23744 | break; |
| 23745 | |
| 23746 | default: |
| 23747 | { |
| 23748 | const char *name = get_DW_OP_name (op); |
| 23749 | |
| 23750 | if (name) |
| 23751 | complaint (&symfile_complaints, _("unsupported stack op: '%s'"), |
| 23752 | name); |
| 23753 | else |
| 23754 | complaint (&symfile_complaints, _("unsupported stack op: '%02x'"), |
| 23755 | op); |
| 23756 | } |
| 23757 | |
| 23758 | return (stack[stacki]); |
| 23759 | } |
| 23760 | |
| 23761 | /* Enforce maximum stack depth of SIZE-1 to avoid writing |
| 23762 | outside of the allocated space. Also enforce minimum>0. */ |
| 23763 | if (stacki >= ARRAY_SIZE (stack) - 1) |
| 23764 | { |
| 23765 | complaint (&symfile_complaints, |
| 23766 | _("location description stack overflow")); |
| 23767 | return 0; |
| 23768 | } |
| 23769 | |
| 23770 | if (stacki <= 0) |
| 23771 | { |
| 23772 | complaint (&symfile_complaints, |
| 23773 | _("location description stack underflow")); |
| 23774 | return 0; |
| 23775 | } |
| 23776 | } |
| 23777 | return (stack[stacki]); |
| 23778 | } |
| 23779 | |
| 23780 | /* memory allocation interface */ |
| 23781 | |
| 23782 | static struct dwarf_block * |
| 23783 | dwarf_alloc_block (struct dwarf2_cu *cu) |
| 23784 | { |
| 23785 | return XOBNEW (&cu->comp_unit_obstack, struct dwarf_block); |
| 23786 | } |
| 23787 | |
| 23788 | static struct die_info * |
| 23789 | dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs) |
| 23790 | { |
| 23791 | struct die_info *die; |
| 23792 | size_t size = sizeof (struct die_info); |
| 23793 | |
| 23794 | if (num_attrs > 1) |
| 23795 | size += (num_attrs - 1) * sizeof (struct attribute); |
| 23796 | |
| 23797 | die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size); |
| 23798 | memset (die, 0, sizeof (struct die_info)); |
| 23799 | return (die); |
| 23800 | } |
| 23801 | |
| 23802 | \f |
| 23803 | /* Macro support. */ |
| 23804 | |
| 23805 | /* Return file name relative to the compilation directory of file number I in |
| 23806 | *LH's file name table. The result is allocated using xmalloc; the caller is |
| 23807 | responsible for freeing it. */ |
| 23808 | |
| 23809 | static char * |
| 23810 | file_file_name (int file, struct line_header *lh) |
| 23811 | { |
| 23812 | /* Is the file number a valid index into the line header's file name |
| 23813 | table? Remember that file numbers start with one, not zero. */ |
| 23814 | if (1 <= file && file <= lh->file_names.size ()) |
| 23815 | { |
| 23816 | const file_entry &fe = lh->file_names[file - 1]; |
| 23817 | |
| 23818 | if (!IS_ABSOLUTE_PATH (fe.name)) |
| 23819 | { |
| 23820 | const char *dir = fe.include_dir (lh); |
| 23821 | if (dir != NULL) |
| 23822 | return concat (dir, SLASH_STRING, fe.name, (char *) NULL); |
| 23823 | } |
| 23824 | return xstrdup (fe.name); |
| 23825 | } |
| 23826 | else |
| 23827 | { |
| 23828 | /* The compiler produced a bogus file number. We can at least |
| 23829 | record the macro definitions made in the file, even if we |
| 23830 | won't be able to find the file by name. */ |
| 23831 | char fake_name[80]; |
| 23832 | |
| 23833 | xsnprintf (fake_name, sizeof (fake_name), |
| 23834 | "<bad macro file number %d>", file); |
| 23835 | |
| 23836 | complaint (&symfile_complaints, |
| 23837 | _("bad file number in macro information (%d)"), |
| 23838 | file); |
| 23839 | |
| 23840 | return xstrdup (fake_name); |
| 23841 | } |
| 23842 | } |
| 23843 | |
| 23844 | /* Return the full name of file number I in *LH's file name table. |
| 23845 | Use COMP_DIR as the name of the current directory of the |
| 23846 | compilation. The result is allocated using xmalloc; the caller is |
| 23847 | responsible for freeing it. */ |
| 23848 | static char * |
| 23849 | file_full_name (int file, struct line_header *lh, const char *comp_dir) |
| 23850 | { |
| 23851 | /* Is the file number a valid index into the line header's file name |
| 23852 | table? Remember that file numbers start with one, not zero. */ |
| 23853 | if (1 <= file && file <= lh->file_names.size ()) |
| 23854 | { |
| 23855 | char *relative = file_file_name (file, lh); |
| 23856 | |
| 23857 | if (IS_ABSOLUTE_PATH (relative) || comp_dir == NULL) |
| 23858 | return relative; |
| 23859 | return reconcat (relative, comp_dir, SLASH_STRING, |
| 23860 | relative, (char *) NULL); |
| 23861 | } |
| 23862 | else |
| 23863 | return file_file_name (file, lh); |
| 23864 | } |
| 23865 | |
| 23866 | |
| 23867 | static struct macro_source_file * |
| 23868 | macro_start_file (int file, int line, |
| 23869 | struct macro_source_file *current_file, |
| 23870 | struct line_header *lh) |
| 23871 | { |
| 23872 | /* File name relative to the compilation directory of this source file. */ |
| 23873 | char *file_name = file_file_name (file, lh); |
| 23874 | |
| 23875 | if (! current_file) |
| 23876 | { |
| 23877 | /* Note: We don't create a macro table for this compilation unit |
| 23878 | at all until we actually get a filename. */ |
| 23879 | struct macro_table *macro_table = get_macro_table (); |
| 23880 | |
| 23881 | /* If we have no current file, then this must be the start_file |
| 23882 | directive for the compilation unit's main source file. */ |
| 23883 | current_file = macro_set_main (macro_table, file_name); |
| 23884 | macro_define_special (macro_table); |
| 23885 | } |
| 23886 | else |
| 23887 | current_file = macro_include (current_file, line, file_name); |
| 23888 | |
| 23889 | xfree (file_name); |
| 23890 | |
| 23891 | return current_file; |
| 23892 | } |
| 23893 | |
| 23894 | static const char * |
| 23895 | consume_improper_spaces (const char *p, const char *body) |
| 23896 | { |
| 23897 | if (*p == ' ') |
| 23898 | { |
| 23899 | complaint (&symfile_complaints, |
| 23900 | _("macro definition contains spaces " |
| 23901 | "in formal argument list:\n`%s'"), |
| 23902 | body); |
| 23903 | |
| 23904 | while (*p == ' ') |
| 23905 | p++; |
| 23906 | } |
| 23907 | |
| 23908 | return p; |
| 23909 | } |
| 23910 | |
| 23911 | |
| 23912 | static void |
| 23913 | parse_macro_definition (struct macro_source_file *file, int line, |
| 23914 | const char *body) |
| 23915 | { |
| 23916 | const char *p; |
| 23917 | |
| 23918 | /* The body string takes one of two forms. For object-like macro |
| 23919 | definitions, it should be: |
| 23920 | |
| 23921 | <macro name> " " <definition> |
| 23922 | |
| 23923 | For function-like macro definitions, it should be: |
| 23924 | |
| 23925 | <macro name> "() " <definition> |
| 23926 | or |
| 23927 | <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition> |
| 23928 | |
| 23929 | Spaces may appear only where explicitly indicated, and in the |
| 23930 | <definition>. |
| 23931 | |
| 23932 | The Dwarf 2 spec says that an object-like macro's name is always |
| 23933 | followed by a space, but versions of GCC around March 2002 omit |
| 23934 | the space when the macro's definition is the empty string. |
| 23935 | |
| 23936 | The Dwarf 2 spec says that there should be no spaces between the |
| 23937 | formal arguments in a function-like macro's formal argument list, |
| 23938 | but versions of GCC around March 2002 include spaces after the |
| 23939 | commas. */ |
| 23940 | |
| 23941 | |
| 23942 | /* Find the extent of the macro name. The macro name is terminated |
| 23943 | by either a space or null character (for an object-like macro) or |
| 23944 | an opening paren (for a function-like macro). */ |
| 23945 | for (p = body; *p; p++) |
| 23946 | if (*p == ' ' || *p == '(') |
| 23947 | break; |
| 23948 | |
| 23949 | if (*p == ' ' || *p == '\0') |
| 23950 | { |
| 23951 | /* It's an object-like macro. */ |
| 23952 | int name_len = p - body; |
| 23953 | char *name = savestring (body, name_len); |
| 23954 | const char *replacement; |
| 23955 | |
| 23956 | if (*p == ' ') |
| 23957 | replacement = body + name_len + 1; |
| 23958 | else |
| 23959 | { |
| 23960 | dwarf2_macro_malformed_definition_complaint (body); |
| 23961 | replacement = body + name_len; |
| 23962 | } |
| 23963 | |
| 23964 | macro_define_object (file, line, name, replacement); |
| 23965 | |
| 23966 | xfree (name); |
| 23967 | } |
| 23968 | else if (*p == '(') |
| 23969 | { |
| 23970 | /* It's a function-like macro. */ |
| 23971 | char *name = savestring (body, p - body); |
| 23972 | int argc = 0; |
| 23973 | int argv_size = 1; |
| 23974 | char **argv = XNEWVEC (char *, argv_size); |
| 23975 | |
| 23976 | p++; |
| 23977 | |
| 23978 | p = consume_improper_spaces (p, body); |
| 23979 | |
| 23980 | /* Parse the formal argument list. */ |
| 23981 | while (*p && *p != ')') |
| 23982 | { |
| 23983 | /* Find the extent of the current argument name. */ |
| 23984 | const char *arg_start = p; |
| 23985 | |
| 23986 | while (*p && *p != ',' && *p != ')' && *p != ' ') |
| 23987 | p++; |
| 23988 | |
| 23989 | if (! *p || p == arg_start) |
| 23990 | dwarf2_macro_malformed_definition_complaint (body); |
| 23991 | else |
| 23992 | { |
| 23993 | /* Make sure argv has room for the new argument. */ |
| 23994 | if (argc >= argv_size) |
| 23995 | { |
| 23996 | argv_size *= 2; |
| 23997 | argv = XRESIZEVEC (char *, argv, argv_size); |
| 23998 | } |
| 23999 | |
| 24000 | argv[argc++] = savestring (arg_start, p - arg_start); |
| 24001 | } |
| 24002 | |
| 24003 | p = consume_improper_spaces (p, body); |
| 24004 | |
| 24005 | /* Consume the comma, if present. */ |
| 24006 | if (*p == ',') |
| 24007 | { |
| 24008 | p++; |
| 24009 | |
| 24010 | p = consume_improper_spaces (p, body); |
| 24011 | } |
| 24012 | } |
| 24013 | |
| 24014 | if (*p == ')') |
| 24015 | { |
| 24016 | p++; |
| 24017 | |
| 24018 | if (*p == ' ') |
| 24019 | /* Perfectly formed definition, no complaints. */ |
| 24020 | macro_define_function (file, line, name, |
| 24021 | argc, (const char **) argv, |
| 24022 | p + 1); |
| 24023 | else if (*p == '\0') |
| 24024 | { |
| 24025 | /* Complain, but do define it. */ |
| 24026 | dwarf2_macro_malformed_definition_complaint (body); |
| 24027 | macro_define_function (file, line, name, |
| 24028 | argc, (const char **) argv, |
| 24029 | p); |
| 24030 | } |
| 24031 | else |
| 24032 | /* Just complain. */ |
| 24033 | dwarf2_macro_malformed_definition_complaint (body); |
| 24034 | } |
| 24035 | else |
| 24036 | /* Just complain. */ |
| 24037 | dwarf2_macro_malformed_definition_complaint (body); |
| 24038 | |
| 24039 | xfree (name); |
| 24040 | { |
| 24041 | int i; |
| 24042 | |
| 24043 | for (i = 0; i < argc; i++) |
| 24044 | xfree (argv[i]); |
| 24045 | } |
| 24046 | xfree (argv); |
| 24047 | } |
| 24048 | else |
| 24049 | dwarf2_macro_malformed_definition_complaint (body); |
| 24050 | } |
| 24051 | |
| 24052 | /* Skip some bytes from BYTES according to the form given in FORM. |
| 24053 | Returns the new pointer. */ |
| 24054 | |
| 24055 | static const gdb_byte * |
| 24056 | skip_form_bytes (bfd *abfd, const gdb_byte *bytes, const gdb_byte *buffer_end, |
| 24057 | enum dwarf_form form, |
| 24058 | unsigned int offset_size, |
| 24059 | struct dwarf2_section_info *section) |
| 24060 | { |
| 24061 | unsigned int bytes_read; |
| 24062 | |
| 24063 | switch (form) |
| 24064 | { |
| 24065 | case DW_FORM_data1: |
| 24066 | case DW_FORM_flag: |
| 24067 | ++bytes; |
| 24068 | break; |
| 24069 | |
| 24070 | case DW_FORM_data2: |
| 24071 | bytes += 2; |
| 24072 | break; |
| 24073 | |
| 24074 | case DW_FORM_data4: |
| 24075 | bytes += 4; |
| 24076 | break; |
| 24077 | |
| 24078 | case DW_FORM_data8: |
| 24079 | bytes += 8; |
| 24080 | break; |
| 24081 | |
| 24082 | case DW_FORM_data16: |
| 24083 | bytes += 16; |
| 24084 | break; |
| 24085 | |
| 24086 | case DW_FORM_string: |
| 24087 | read_direct_string (abfd, bytes, &bytes_read); |
| 24088 | bytes += bytes_read; |
| 24089 | break; |
| 24090 | |
| 24091 | case DW_FORM_sec_offset: |
| 24092 | case DW_FORM_strp: |
| 24093 | case DW_FORM_GNU_strp_alt: |
| 24094 | bytes += offset_size; |
| 24095 | break; |
| 24096 | |
| 24097 | case DW_FORM_block: |
| 24098 | bytes += read_unsigned_leb128 (abfd, bytes, &bytes_read); |
| 24099 | bytes += bytes_read; |
| 24100 | break; |
| 24101 | |
| 24102 | case DW_FORM_block1: |
| 24103 | bytes += 1 + read_1_byte (abfd, bytes); |
| 24104 | break; |
| 24105 | case DW_FORM_block2: |
| 24106 | bytes += 2 + read_2_bytes (abfd, bytes); |
| 24107 | break; |
| 24108 | case DW_FORM_block4: |
| 24109 | bytes += 4 + read_4_bytes (abfd, bytes); |
| 24110 | break; |
| 24111 | |
| 24112 | case DW_FORM_sdata: |
| 24113 | case DW_FORM_udata: |
| 24114 | case DW_FORM_GNU_addr_index: |
| 24115 | case DW_FORM_GNU_str_index: |
| 24116 | bytes = gdb_skip_leb128 (bytes, buffer_end); |
| 24117 | if (bytes == NULL) |
| 24118 | { |
| 24119 | dwarf2_section_buffer_overflow_complaint (section); |
| 24120 | return NULL; |
| 24121 | } |
| 24122 | break; |
| 24123 | |
| 24124 | case DW_FORM_implicit_const: |
| 24125 | break; |
| 24126 | |
| 24127 | default: |
| 24128 | { |
| 24129 | complaint (&symfile_complaints, |
| 24130 | _("invalid form 0x%x in `%s'"), |
| 24131 | form, get_section_name (section)); |
| 24132 | return NULL; |
| 24133 | } |
| 24134 | } |
| 24135 | |
| 24136 | return bytes; |
| 24137 | } |
| 24138 | |
| 24139 | /* A helper for dwarf_decode_macros that handles skipping an unknown |
| 24140 | opcode. Returns an updated pointer to the macro data buffer; or, |
| 24141 | on error, issues a complaint and returns NULL. */ |
| 24142 | |
| 24143 | static const gdb_byte * |
| 24144 | skip_unknown_opcode (unsigned int opcode, |
| 24145 | const gdb_byte **opcode_definitions, |
| 24146 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, |
| 24147 | bfd *abfd, |
| 24148 | unsigned int offset_size, |
| 24149 | struct dwarf2_section_info *section) |
| 24150 | { |
| 24151 | unsigned int bytes_read, i; |
| 24152 | unsigned long arg; |
| 24153 | const gdb_byte *defn; |
| 24154 | |
| 24155 | if (opcode_definitions[opcode] == NULL) |
| 24156 | { |
| 24157 | complaint (&symfile_complaints, |
| 24158 | _("unrecognized DW_MACFINO opcode 0x%x"), |
| 24159 | opcode); |
| 24160 | return NULL; |
| 24161 | } |
| 24162 | |
| 24163 | defn = opcode_definitions[opcode]; |
| 24164 | arg = read_unsigned_leb128 (abfd, defn, &bytes_read); |
| 24165 | defn += bytes_read; |
| 24166 | |
| 24167 | for (i = 0; i < arg; ++i) |
| 24168 | { |
| 24169 | mac_ptr = skip_form_bytes (abfd, mac_ptr, mac_end, |
| 24170 | (enum dwarf_form) defn[i], offset_size, |
| 24171 | section); |
| 24172 | if (mac_ptr == NULL) |
| 24173 | { |
| 24174 | /* skip_form_bytes already issued the complaint. */ |
| 24175 | return NULL; |
| 24176 | } |
| 24177 | } |
| 24178 | |
| 24179 | return mac_ptr; |
| 24180 | } |
| 24181 | |
| 24182 | /* A helper function which parses the header of a macro section. |
| 24183 | If the macro section is the extended (for now called "GNU") type, |
| 24184 | then this updates *OFFSET_SIZE. Returns a pointer to just after |
| 24185 | the header, or issues a complaint and returns NULL on error. */ |
| 24186 | |
| 24187 | static const gdb_byte * |
| 24188 | dwarf_parse_macro_header (const gdb_byte **opcode_definitions, |
| 24189 | bfd *abfd, |
| 24190 | const gdb_byte *mac_ptr, |
| 24191 | unsigned int *offset_size, |
| 24192 | int section_is_gnu) |
| 24193 | { |
| 24194 | memset (opcode_definitions, 0, 256 * sizeof (gdb_byte *)); |
| 24195 | |
| 24196 | if (section_is_gnu) |
| 24197 | { |
| 24198 | unsigned int version, flags; |
| 24199 | |
| 24200 | version = read_2_bytes (abfd, mac_ptr); |
| 24201 | if (version != 4 && version != 5) |
| 24202 | { |
| 24203 | complaint (&symfile_complaints, |
| 24204 | _("unrecognized version `%d' in .debug_macro section"), |
| 24205 | version); |
| 24206 | return NULL; |
| 24207 | } |
| 24208 | mac_ptr += 2; |
| 24209 | |
| 24210 | flags = read_1_byte (abfd, mac_ptr); |
| 24211 | ++mac_ptr; |
| 24212 | *offset_size = (flags & 1) ? 8 : 4; |
| 24213 | |
| 24214 | if ((flags & 2) != 0) |
| 24215 | /* We don't need the line table offset. */ |
| 24216 | mac_ptr += *offset_size; |
| 24217 | |
| 24218 | /* Vendor opcode descriptions. */ |
| 24219 | if ((flags & 4) != 0) |
| 24220 | { |
| 24221 | unsigned int i, count; |
| 24222 | |
| 24223 | count = read_1_byte (abfd, mac_ptr); |
| 24224 | ++mac_ptr; |
| 24225 | for (i = 0; i < count; ++i) |
| 24226 | { |
| 24227 | unsigned int opcode, bytes_read; |
| 24228 | unsigned long arg; |
| 24229 | |
| 24230 | opcode = read_1_byte (abfd, mac_ptr); |
| 24231 | ++mac_ptr; |
| 24232 | opcode_definitions[opcode] = mac_ptr; |
| 24233 | arg = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
| 24234 | mac_ptr += bytes_read; |
| 24235 | mac_ptr += arg; |
| 24236 | } |
| 24237 | } |
| 24238 | } |
| 24239 | |
| 24240 | return mac_ptr; |
| 24241 | } |
| 24242 | |
| 24243 | /* A helper for dwarf_decode_macros that handles the GNU extensions, |
| 24244 | including DW_MACRO_import. */ |
| 24245 | |
| 24246 | static void |
| 24247 | dwarf_decode_macro_bytes (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 24248 | bfd *abfd, |
| 24249 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, |
| 24250 | struct macro_source_file *current_file, |
| 24251 | struct line_header *lh, |
| 24252 | struct dwarf2_section_info *section, |
| 24253 | int section_is_gnu, int section_is_dwz, |
| 24254 | unsigned int offset_size, |
| 24255 | htab_t include_hash) |
| 24256 | { |
| 24257 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 24258 | enum dwarf_macro_record_type macinfo_type; |
| 24259 | int at_commandline; |
| 24260 | const gdb_byte *opcode_definitions[256]; |
| 24261 | |
| 24262 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, |
| 24263 | &offset_size, section_is_gnu); |
| 24264 | if (mac_ptr == NULL) |
| 24265 | { |
| 24266 | /* We already issued a complaint. */ |
| 24267 | return; |
| 24268 | } |
| 24269 | |
| 24270 | /* Determines if GDB is still before first DW_MACINFO_start_file. If true |
| 24271 | GDB is still reading the definitions from command line. First |
| 24272 | DW_MACINFO_start_file will need to be ignored as it was already executed |
| 24273 | to create CURRENT_FILE for the main source holding also the command line |
| 24274 | definitions. On first met DW_MACINFO_start_file this flag is reset to |
| 24275 | normally execute all the remaining DW_MACINFO_start_file macinfos. */ |
| 24276 | |
| 24277 | at_commandline = 1; |
| 24278 | |
| 24279 | do |
| 24280 | { |
| 24281 | /* Do we at least have room for a macinfo type byte? */ |
| 24282 | if (mac_ptr >= mac_end) |
| 24283 | { |
| 24284 | dwarf2_section_buffer_overflow_complaint (section); |
| 24285 | break; |
| 24286 | } |
| 24287 | |
| 24288 | macinfo_type = (enum dwarf_macro_record_type) read_1_byte (abfd, mac_ptr); |
| 24289 | mac_ptr++; |
| 24290 | |
| 24291 | /* Note that we rely on the fact that the corresponding GNU and |
| 24292 | DWARF constants are the same. */ |
| 24293 | DIAGNOSTIC_PUSH |
| 24294 | DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES |
| 24295 | switch (macinfo_type) |
| 24296 | { |
| 24297 | /* A zero macinfo type indicates the end of the macro |
| 24298 | information. */ |
| 24299 | case 0: |
| 24300 | break; |
| 24301 | |
| 24302 | case DW_MACRO_define: |
| 24303 | case DW_MACRO_undef: |
| 24304 | case DW_MACRO_define_strp: |
| 24305 | case DW_MACRO_undef_strp: |
| 24306 | case DW_MACRO_define_sup: |
| 24307 | case DW_MACRO_undef_sup: |
| 24308 | { |
| 24309 | unsigned int bytes_read; |
| 24310 | int line; |
| 24311 | const char *body; |
| 24312 | int is_define; |
| 24313 | |
| 24314 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
| 24315 | mac_ptr += bytes_read; |
| 24316 | |
| 24317 | if (macinfo_type == DW_MACRO_define |
| 24318 | || macinfo_type == DW_MACRO_undef) |
| 24319 | { |
| 24320 | body = read_direct_string (abfd, mac_ptr, &bytes_read); |
| 24321 | mac_ptr += bytes_read; |
| 24322 | } |
| 24323 | else |
| 24324 | { |
| 24325 | LONGEST str_offset; |
| 24326 | |
| 24327 | str_offset = read_offset_1 (abfd, mac_ptr, offset_size); |
| 24328 | mac_ptr += offset_size; |
| 24329 | |
| 24330 | if (macinfo_type == DW_MACRO_define_sup |
| 24331 | || macinfo_type == DW_MACRO_undef_sup |
| 24332 | || section_is_dwz) |
| 24333 | { |
| 24334 | struct dwz_file *dwz |
| 24335 | = dwarf2_get_dwz_file (dwarf2_per_objfile); |
| 24336 | |
| 24337 | body = read_indirect_string_from_dwz (objfile, |
| 24338 | dwz, str_offset); |
| 24339 | } |
| 24340 | else |
| 24341 | body = read_indirect_string_at_offset (dwarf2_per_objfile, |
| 24342 | abfd, str_offset); |
| 24343 | } |
| 24344 | |
| 24345 | is_define = (macinfo_type == DW_MACRO_define |
| 24346 | || macinfo_type == DW_MACRO_define_strp |
| 24347 | || macinfo_type == DW_MACRO_define_sup); |
| 24348 | if (! current_file) |
| 24349 | { |
| 24350 | /* DWARF violation as no main source is present. */ |
| 24351 | complaint (&symfile_complaints, |
| 24352 | _("debug info with no main source gives macro %s " |
| 24353 | "on line %d: %s"), |
| 24354 | is_define ? _("definition") : _("undefinition"), |
| 24355 | line, body); |
| 24356 | break; |
| 24357 | } |
| 24358 | if ((line == 0 && !at_commandline) |
| 24359 | || (line != 0 && at_commandline)) |
| 24360 | complaint (&symfile_complaints, |
| 24361 | _("debug info gives %s macro %s with %s line %d: %s"), |
| 24362 | at_commandline ? _("command-line") : _("in-file"), |
| 24363 | is_define ? _("definition") : _("undefinition"), |
| 24364 | line == 0 ? _("zero") : _("non-zero"), line, body); |
| 24365 | |
| 24366 | if (is_define) |
| 24367 | parse_macro_definition (current_file, line, body); |
| 24368 | else |
| 24369 | { |
| 24370 | gdb_assert (macinfo_type == DW_MACRO_undef |
| 24371 | || macinfo_type == DW_MACRO_undef_strp |
| 24372 | || macinfo_type == DW_MACRO_undef_sup); |
| 24373 | macro_undef (current_file, line, body); |
| 24374 | } |
| 24375 | } |
| 24376 | break; |
| 24377 | |
| 24378 | case DW_MACRO_start_file: |
| 24379 | { |
| 24380 | unsigned int bytes_read; |
| 24381 | int line, file; |
| 24382 | |
| 24383 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
| 24384 | mac_ptr += bytes_read; |
| 24385 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
| 24386 | mac_ptr += bytes_read; |
| 24387 | |
| 24388 | if ((line == 0 && !at_commandline) |
| 24389 | || (line != 0 && at_commandline)) |
| 24390 | complaint (&symfile_complaints, |
| 24391 | _("debug info gives source %d included " |
| 24392 | "from %s at %s line %d"), |
| 24393 | file, at_commandline ? _("command-line") : _("file"), |
| 24394 | line == 0 ? _("zero") : _("non-zero"), line); |
| 24395 | |
| 24396 | if (at_commandline) |
| 24397 | { |
| 24398 | /* This DW_MACRO_start_file was executed in the |
| 24399 | pass one. */ |
| 24400 | at_commandline = 0; |
| 24401 | } |
| 24402 | else |
| 24403 | current_file = macro_start_file (file, line, current_file, lh); |
| 24404 | } |
| 24405 | break; |
| 24406 | |
| 24407 | case DW_MACRO_end_file: |
| 24408 | if (! current_file) |
| 24409 | complaint (&symfile_complaints, |
| 24410 | _("macro debug info has an unmatched " |
| 24411 | "`close_file' directive")); |
| 24412 | else |
| 24413 | { |
| 24414 | current_file = current_file->included_by; |
| 24415 | if (! current_file) |
| 24416 | { |
| 24417 | enum dwarf_macro_record_type next_type; |
| 24418 | |
| 24419 | /* GCC circa March 2002 doesn't produce the zero |
| 24420 | type byte marking the end of the compilation |
| 24421 | unit. Complain if it's not there, but exit no |
| 24422 | matter what. */ |
| 24423 | |
| 24424 | /* Do we at least have room for a macinfo type byte? */ |
| 24425 | if (mac_ptr >= mac_end) |
| 24426 | { |
| 24427 | dwarf2_section_buffer_overflow_complaint (section); |
| 24428 | return; |
| 24429 | } |
| 24430 | |
| 24431 | /* We don't increment mac_ptr here, so this is just |
| 24432 | a look-ahead. */ |
| 24433 | next_type |
| 24434 | = (enum dwarf_macro_record_type) read_1_byte (abfd, |
| 24435 | mac_ptr); |
| 24436 | if (next_type != 0) |
| 24437 | complaint (&symfile_complaints, |
| 24438 | _("no terminating 0-type entry for " |
| 24439 | "macros in `.debug_macinfo' section")); |
| 24440 | |
| 24441 | return; |
| 24442 | } |
| 24443 | } |
| 24444 | break; |
| 24445 | |
| 24446 | case DW_MACRO_import: |
| 24447 | case DW_MACRO_import_sup: |
| 24448 | { |
| 24449 | LONGEST offset; |
| 24450 | void **slot; |
| 24451 | bfd *include_bfd = abfd; |
| 24452 | struct dwarf2_section_info *include_section = section; |
| 24453 | const gdb_byte *include_mac_end = mac_end; |
| 24454 | int is_dwz = section_is_dwz; |
| 24455 | const gdb_byte *new_mac_ptr; |
| 24456 | |
| 24457 | offset = read_offset_1 (abfd, mac_ptr, offset_size); |
| 24458 | mac_ptr += offset_size; |
| 24459 | |
| 24460 | if (macinfo_type == DW_MACRO_import_sup) |
| 24461 | { |
| 24462 | struct dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
| 24463 | |
| 24464 | dwarf2_read_section (objfile, &dwz->macro); |
| 24465 | |
| 24466 | include_section = &dwz->macro; |
| 24467 | include_bfd = get_section_bfd_owner (include_section); |
| 24468 | include_mac_end = dwz->macro.buffer + dwz->macro.size; |
| 24469 | is_dwz = 1; |
| 24470 | } |
| 24471 | |
| 24472 | new_mac_ptr = include_section->buffer + offset; |
| 24473 | slot = htab_find_slot (include_hash, new_mac_ptr, INSERT); |
| 24474 | |
| 24475 | if (*slot != NULL) |
| 24476 | { |
| 24477 | /* This has actually happened; see |
| 24478 | http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */ |
| 24479 | complaint (&symfile_complaints, |
| 24480 | _("recursive DW_MACRO_import in " |
| 24481 | ".debug_macro section")); |
| 24482 | } |
| 24483 | else |
| 24484 | { |
| 24485 | *slot = (void *) new_mac_ptr; |
| 24486 | |
| 24487 | dwarf_decode_macro_bytes (dwarf2_per_objfile, |
| 24488 | include_bfd, new_mac_ptr, |
| 24489 | include_mac_end, current_file, lh, |
| 24490 | section, section_is_gnu, is_dwz, |
| 24491 | offset_size, include_hash); |
| 24492 | |
| 24493 | htab_remove_elt (include_hash, (void *) new_mac_ptr); |
| 24494 | } |
| 24495 | } |
| 24496 | break; |
| 24497 | |
| 24498 | case DW_MACINFO_vendor_ext: |
| 24499 | if (!section_is_gnu) |
| 24500 | { |
| 24501 | unsigned int bytes_read; |
| 24502 | |
| 24503 | /* This reads the constant, but since we don't recognize |
| 24504 | any vendor extensions, we ignore it. */ |
| 24505 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
| 24506 | mac_ptr += bytes_read; |
| 24507 | read_direct_string (abfd, mac_ptr, &bytes_read); |
| 24508 | mac_ptr += bytes_read; |
| 24509 | |
| 24510 | /* We don't recognize any vendor extensions. */ |
| 24511 | break; |
| 24512 | } |
| 24513 | /* FALLTHROUGH */ |
| 24514 | |
| 24515 | default: |
| 24516 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, |
| 24517 | mac_ptr, mac_end, abfd, offset_size, |
| 24518 | section); |
| 24519 | if (mac_ptr == NULL) |
| 24520 | return; |
| 24521 | break; |
| 24522 | } |
| 24523 | DIAGNOSTIC_POP |
| 24524 | } while (macinfo_type != 0); |
| 24525 | } |
| 24526 | |
| 24527 | static void |
| 24528 | dwarf_decode_macros (struct dwarf2_cu *cu, unsigned int offset, |
| 24529 | int section_is_gnu) |
| 24530 | { |
| 24531 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 24532 | = cu->per_cu->dwarf2_per_objfile; |
| 24533 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 24534 | struct line_header *lh = cu->line_header; |
| 24535 | bfd *abfd; |
| 24536 | const gdb_byte *mac_ptr, *mac_end; |
| 24537 | struct macro_source_file *current_file = 0; |
| 24538 | enum dwarf_macro_record_type macinfo_type; |
| 24539 | unsigned int offset_size = cu->header.offset_size; |
| 24540 | const gdb_byte *opcode_definitions[256]; |
| 24541 | void **slot; |
| 24542 | struct dwarf2_section_info *section; |
| 24543 | const char *section_name; |
| 24544 | |
| 24545 | if (cu->dwo_unit != NULL) |
| 24546 | { |
| 24547 | if (section_is_gnu) |
| 24548 | { |
| 24549 | section = &cu->dwo_unit->dwo_file->sections.macro; |
| 24550 | section_name = ".debug_macro.dwo"; |
| 24551 | } |
| 24552 | else |
| 24553 | { |
| 24554 | section = &cu->dwo_unit->dwo_file->sections.macinfo; |
| 24555 | section_name = ".debug_macinfo.dwo"; |
| 24556 | } |
| 24557 | } |
| 24558 | else |
| 24559 | { |
| 24560 | if (section_is_gnu) |
| 24561 | { |
| 24562 | section = &dwarf2_per_objfile->macro; |
| 24563 | section_name = ".debug_macro"; |
| 24564 | } |
| 24565 | else |
| 24566 | { |
| 24567 | section = &dwarf2_per_objfile->macinfo; |
| 24568 | section_name = ".debug_macinfo"; |
| 24569 | } |
| 24570 | } |
| 24571 | |
| 24572 | dwarf2_read_section (objfile, section); |
| 24573 | if (section->buffer == NULL) |
| 24574 | { |
| 24575 | complaint (&symfile_complaints, _("missing %s section"), section_name); |
| 24576 | return; |
| 24577 | } |
| 24578 | abfd = get_section_bfd_owner (section); |
| 24579 | |
| 24580 | /* First pass: Find the name of the base filename. |
| 24581 | This filename is needed in order to process all macros whose definition |
| 24582 | (or undefinition) comes from the command line. These macros are defined |
| 24583 | before the first DW_MACINFO_start_file entry, and yet still need to be |
| 24584 | associated to the base file. |
| 24585 | |
| 24586 | To determine the base file name, we scan the macro definitions until we |
| 24587 | reach the first DW_MACINFO_start_file entry. We then initialize |
| 24588 | CURRENT_FILE accordingly so that any macro definition found before the |
| 24589 | first DW_MACINFO_start_file can still be associated to the base file. */ |
| 24590 | |
| 24591 | mac_ptr = section->buffer + offset; |
| 24592 | mac_end = section->buffer + section->size; |
| 24593 | |
| 24594 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, |
| 24595 | &offset_size, section_is_gnu); |
| 24596 | if (mac_ptr == NULL) |
| 24597 | { |
| 24598 | /* We already issued a complaint. */ |
| 24599 | return; |
| 24600 | } |
| 24601 | |
| 24602 | do |
| 24603 | { |
| 24604 | /* Do we at least have room for a macinfo type byte? */ |
| 24605 | if (mac_ptr >= mac_end) |
| 24606 | { |
| 24607 | /* Complaint is printed during the second pass as GDB will probably |
| 24608 | stop the first pass earlier upon finding |
| 24609 | DW_MACINFO_start_file. */ |
| 24610 | break; |
| 24611 | } |
| 24612 | |
| 24613 | macinfo_type = (enum dwarf_macro_record_type) read_1_byte (abfd, mac_ptr); |
| 24614 | mac_ptr++; |
| 24615 | |
| 24616 | /* Note that we rely on the fact that the corresponding GNU and |
| 24617 | DWARF constants are the same. */ |
| 24618 | DIAGNOSTIC_PUSH |
| 24619 | DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES |
| 24620 | switch (macinfo_type) |
| 24621 | { |
| 24622 | /* A zero macinfo type indicates the end of the macro |
| 24623 | information. */ |
| 24624 | case 0: |
| 24625 | break; |
| 24626 | |
| 24627 | case DW_MACRO_define: |
| 24628 | case DW_MACRO_undef: |
| 24629 | /* Only skip the data by MAC_PTR. */ |
| 24630 | { |
| 24631 | unsigned int bytes_read; |
| 24632 | |
| 24633 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
| 24634 | mac_ptr += bytes_read; |
| 24635 | read_direct_string (abfd, mac_ptr, &bytes_read); |
| 24636 | mac_ptr += bytes_read; |
| 24637 | } |
| 24638 | break; |
| 24639 | |
| 24640 | case DW_MACRO_start_file: |
| 24641 | { |
| 24642 | unsigned int bytes_read; |
| 24643 | int line, file; |
| 24644 | |
| 24645 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
| 24646 | mac_ptr += bytes_read; |
| 24647 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
| 24648 | mac_ptr += bytes_read; |
| 24649 | |
| 24650 | current_file = macro_start_file (file, line, current_file, lh); |
| 24651 | } |
| 24652 | break; |
| 24653 | |
| 24654 | case DW_MACRO_end_file: |
| 24655 | /* No data to skip by MAC_PTR. */ |
| 24656 | break; |
| 24657 | |
| 24658 | case DW_MACRO_define_strp: |
| 24659 | case DW_MACRO_undef_strp: |
| 24660 | case DW_MACRO_define_sup: |
| 24661 | case DW_MACRO_undef_sup: |
| 24662 | { |
| 24663 | unsigned int bytes_read; |
| 24664 | |
| 24665 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
| 24666 | mac_ptr += bytes_read; |
| 24667 | mac_ptr += offset_size; |
| 24668 | } |
| 24669 | break; |
| 24670 | |
| 24671 | case DW_MACRO_import: |
| 24672 | case DW_MACRO_import_sup: |
| 24673 | /* Note that, according to the spec, a transparent include |
| 24674 | chain cannot call DW_MACRO_start_file. So, we can just |
| 24675 | skip this opcode. */ |
| 24676 | mac_ptr += offset_size; |
| 24677 | break; |
| 24678 | |
| 24679 | case DW_MACINFO_vendor_ext: |
| 24680 | /* Only skip the data by MAC_PTR. */ |
| 24681 | if (!section_is_gnu) |
| 24682 | { |
| 24683 | unsigned int bytes_read; |
| 24684 | |
| 24685 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
| 24686 | mac_ptr += bytes_read; |
| 24687 | read_direct_string (abfd, mac_ptr, &bytes_read); |
| 24688 | mac_ptr += bytes_read; |
| 24689 | } |
| 24690 | /* FALLTHROUGH */ |
| 24691 | |
| 24692 | default: |
| 24693 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, |
| 24694 | mac_ptr, mac_end, abfd, offset_size, |
| 24695 | section); |
| 24696 | if (mac_ptr == NULL) |
| 24697 | return; |
| 24698 | break; |
| 24699 | } |
| 24700 | DIAGNOSTIC_POP |
| 24701 | } while (macinfo_type != 0 && current_file == NULL); |
| 24702 | |
| 24703 | /* Second pass: Process all entries. |
| 24704 | |
| 24705 | Use the AT_COMMAND_LINE flag to determine whether we are still processing |
| 24706 | command-line macro definitions/undefinitions. This flag is unset when we |
| 24707 | reach the first DW_MACINFO_start_file entry. */ |
| 24708 | |
| 24709 | htab_up include_hash (htab_create_alloc (1, htab_hash_pointer, |
| 24710 | htab_eq_pointer, |
| 24711 | NULL, xcalloc, xfree)); |
| 24712 | mac_ptr = section->buffer + offset; |
| 24713 | slot = htab_find_slot (include_hash.get (), mac_ptr, INSERT); |
| 24714 | *slot = (void *) mac_ptr; |
| 24715 | dwarf_decode_macro_bytes (dwarf2_per_objfile, |
| 24716 | abfd, mac_ptr, mac_end, |
| 24717 | current_file, lh, section, |
| 24718 | section_is_gnu, 0, offset_size, |
| 24719 | include_hash.get ()); |
| 24720 | } |
| 24721 | |
| 24722 | /* Check if the attribute's form is a DW_FORM_block* |
| 24723 | if so return true else false. */ |
| 24724 | |
| 24725 | static int |
| 24726 | attr_form_is_block (const struct attribute *attr) |
| 24727 | { |
| 24728 | return (attr == NULL ? 0 : |
| 24729 | attr->form == DW_FORM_block1 |
| 24730 | || attr->form == DW_FORM_block2 |
| 24731 | || attr->form == DW_FORM_block4 |
| 24732 | || attr->form == DW_FORM_block |
| 24733 | || attr->form == DW_FORM_exprloc); |
| 24734 | } |
| 24735 | |
| 24736 | /* Return non-zero if ATTR's value is a section offset --- classes |
| 24737 | lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise. |
| 24738 | You may use DW_UNSND (attr) to retrieve such offsets. |
| 24739 | |
| 24740 | Section 7.5.4, "Attribute Encodings", explains that no attribute |
| 24741 | may have a value that belongs to more than one of these classes; it |
| 24742 | would be ambiguous if we did, because we use the same forms for all |
| 24743 | of them. */ |
| 24744 | |
| 24745 | static int |
| 24746 | attr_form_is_section_offset (const struct attribute *attr) |
| 24747 | { |
| 24748 | return (attr->form == DW_FORM_data4 |
| 24749 | || attr->form == DW_FORM_data8 |
| 24750 | || attr->form == DW_FORM_sec_offset); |
| 24751 | } |
| 24752 | |
| 24753 | /* Return non-zero if ATTR's value falls in the 'constant' class, or |
| 24754 | zero otherwise. When this function returns true, you can apply |
| 24755 | dwarf2_get_attr_constant_value to it. |
| 24756 | |
| 24757 | However, note that for some attributes you must check |
| 24758 | attr_form_is_section_offset before using this test. DW_FORM_data4 |
| 24759 | and DW_FORM_data8 are members of both the constant class, and of |
| 24760 | the classes that contain offsets into other debug sections |
| 24761 | (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says |
| 24762 | that, if an attribute's can be either a constant or one of the |
| 24763 | section offset classes, DW_FORM_data4 and DW_FORM_data8 should be |
| 24764 | taken as section offsets, not constants. |
| 24765 | |
| 24766 | DW_FORM_data16 is not considered as dwarf2_get_attr_constant_value |
| 24767 | cannot handle that. */ |
| 24768 | |
| 24769 | static int |
| 24770 | attr_form_is_constant (const struct attribute *attr) |
| 24771 | { |
| 24772 | switch (attr->form) |
| 24773 | { |
| 24774 | case DW_FORM_sdata: |
| 24775 | case DW_FORM_udata: |
| 24776 | case DW_FORM_data1: |
| 24777 | case DW_FORM_data2: |
| 24778 | case DW_FORM_data4: |
| 24779 | case DW_FORM_data8: |
| 24780 | case DW_FORM_implicit_const: |
| 24781 | return 1; |
| 24782 | default: |
| 24783 | return 0; |
| 24784 | } |
| 24785 | } |
| 24786 | |
| 24787 | |
| 24788 | /* DW_ADDR is always stored already as sect_offset; despite for the forms |
| 24789 | besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */ |
| 24790 | |
| 24791 | static int |
| 24792 | attr_form_is_ref (const struct attribute *attr) |
| 24793 | { |
| 24794 | switch (attr->form) |
| 24795 | { |
| 24796 | case DW_FORM_ref_addr: |
| 24797 | case DW_FORM_ref1: |
| 24798 | case DW_FORM_ref2: |
| 24799 | case DW_FORM_ref4: |
| 24800 | case DW_FORM_ref8: |
| 24801 | case DW_FORM_ref_udata: |
| 24802 | case DW_FORM_GNU_ref_alt: |
| 24803 | return 1; |
| 24804 | default: |
| 24805 | return 0; |
| 24806 | } |
| 24807 | } |
| 24808 | |
| 24809 | /* Return the .debug_loc section to use for CU. |
| 24810 | For DWO files use .debug_loc.dwo. */ |
| 24811 | |
| 24812 | static struct dwarf2_section_info * |
| 24813 | cu_debug_loc_section (struct dwarf2_cu *cu) |
| 24814 | { |
| 24815 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 24816 | = cu->per_cu->dwarf2_per_objfile; |
| 24817 | |
| 24818 | if (cu->dwo_unit) |
| 24819 | { |
| 24820 | struct dwo_sections *sections = &cu->dwo_unit->dwo_file->sections; |
| 24821 | |
| 24822 | return cu->header.version >= 5 ? §ions->loclists : §ions->loc; |
| 24823 | } |
| 24824 | return (cu->header.version >= 5 ? &dwarf2_per_objfile->loclists |
| 24825 | : &dwarf2_per_objfile->loc); |
| 24826 | } |
| 24827 | |
| 24828 | /* A helper function that fills in a dwarf2_loclist_baton. */ |
| 24829 | |
| 24830 | static void |
| 24831 | fill_in_loclist_baton (struct dwarf2_cu *cu, |
| 24832 | struct dwarf2_loclist_baton *baton, |
| 24833 | const struct attribute *attr) |
| 24834 | { |
| 24835 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 24836 | = cu->per_cu->dwarf2_per_objfile; |
| 24837 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
| 24838 | |
| 24839 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); |
| 24840 | |
| 24841 | baton->per_cu = cu->per_cu; |
| 24842 | gdb_assert (baton->per_cu); |
| 24843 | /* We don't know how long the location list is, but make sure we |
| 24844 | don't run off the edge of the section. */ |
| 24845 | baton->size = section->size - DW_UNSND (attr); |
| 24846 | baton->data = section->buffer + DW_UNSND (attr); |
| 24847 | baton->base_address = cu->base_address; |
| 24848 | baton->from_dwo = cu->dwo_unit != NULL; |
| 24849 | } |
| 24850 | |
| 24851 | static void |
| 24852 | dwarf2_symbol_mark_computed (const struct attribute *attr, struct symbol *sym, |
| 24853 | struct dwarf2_cu *cu, int is_block) |
| 24854 | { |
| 24855 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 24856 | = cu->per_cu->dwarf2_per_objfile; |
| 24857 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 24858 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
| 24859 | |
| 24860 | if (attr_form_is_section_offset (attr) |
| 24861 | /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside |
| 24862 | the section. If so, fall through to the complaint in the |
| 24863 | other branch. */ |
| 24864 | && DW_UNSND (attr) < dwarf2_section_size (objfile, section)) |
| 24865 | { |
| 24866 | struct dwarf2_loclist_baton *baton; |
| 24867 | |
| 24868 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_loclist_baton); |
| 24869 | |
| 24870 | fill_in_loclist_baton (cu, baton, attr); |
| 24871 | |
| 24872 | if (cu->base_known == 0) |
| 24873 | complaint (&symfile_complaints, |
| 24874 | _("Location list used without " |
| 24875 | "specifying the CU base address.")); |
| 24876 | |
| 24877 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
| 24878 | ? dwarf2_loclist_block_index |
| 24879 | : dwarf2_loclist_index); |
| 24880 | SYMBOL_LOCATION_BATON (sym) = baton; |
| 24881 | } |
| 24882 | else |
| 24883 | { |
| 24884 | struct dwarf2_locexpr_baton *baton; |
| 24885 | |
| 24886 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
| 24887 | baton->per_cu = cu->per_cu; |
| 24888 | gdb_assert (baton->per_cu); |
| 24889 | |
| 24890 | if (attr_form_is_block (attr)) |
| 24891 | { |
| 24892 | /* Note that we're just copying the block's data pointer |
| 24893 | here, not the actual data. We're still pointing into the |
| 24894 | info_buffer for SYM's objfile; right now we never release |
| 24895 | that buffer, but when we do clean up properly this may |
| 24896 | need to change. */ |
| 24897 | baton->size = DW_BLOCK (attr)->size; |
| 24898 | baton->data = DW_BLOCK (attr)->data; |
| 24899 | } |
| 24900 | else |
| 24901 | { |
| 24902 | dwarf2_invalid_attrib_class_complaint ("location description", |
| 24903 | SYMBOL_NATURAL_NAME (sym)); |
| 24904 | baton->size = 0; |
| 24905 | } |
| 24906 | |
| 24907 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
| 24908 | ? dwarf2_locexpr_block_index |
| 24909 | : dwarf2_locexpr_index); |
| 24910 | SYMBOL_LOCATION_BATON (sym) = baton; |
| 24911 | } |
| 24912 | } |
| 24913 | |
| 24914 | /* Return the OBJFILE associated with the compilation unit CU. If CU |
| 24915 | came from a separate debuginfo file, then the master objfile is |
| 24916 | returned. */ |
| 24917 | |
| 24918 | struct objfile * |
| 24919 | dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *per_cu) |
| 24920 | { |
| 24921 | struct objfile *objfile = per_cu->dwarf2_per_objfile->objfile; |
| 24922 | |
| 24923 | /* Return the master objfile, so that we can report and look up the |
| 24924 | correct file containing this variable. */ |
| 24925 | if (objfile->separate_debug_objfile_backlink) |
| 24926 | objfile = objfile->separate_debug_objfile_backlink; |
| 24927 | |
| 24928 | return objfile; |
| 24929 | } |
| 24930 | |
| 24931 | /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU |
| 24932 | (CU_HEADERP is unused in such case) or prepare a temporary copy at |
| 24933 | CU_HEADERP first. */ |
| 24934 | |
| 24935 | static const struct comp_unit_head * |
| 24936 | per_cu_header_read_in (struct comp_unit_head *cu_headerp, |
| 24937 | struct dwarf2_per_cu_data *per_cu) |
| 24938 | { |
| 24939 | const gdb_byte *info_ptr; |
| 24940 | |
| 24941 | if (per_cu->cu) |
| 24942 | return &per_cu->cu->header; |
| 24943 | |
| 24944 | info_ptr = per_cu->section->buffer + to_underlying (per_cu->sect_off); |
| 24945 | |
| 24946 | memset (cu_headerp, 0, sizeof (*cu_headerp)); |
| 24947 | read_comp_unit_head (cu_headerp, info_ptr, per_cu->section, |
| 24948 | rcuh_kind::COMPILE); |
| 24949 | |
| 24950 | return cu_headerp; |
| 24951 | } |
| 24952 | |
| 24953 | /* Return the address size given in the compilation unit header for CU. */ |
| 24954 | |
| 24955 | int |
| 24956 | dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *per_cu) |
| 24957 | { |
| 24958 | struct comp_unit_head cu_header_local; |
| 24959 | const struct comp_unit_head *cu_headerp; |
| 24960 | |
| 24961 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
| 24962 | |
| 24963 | return cu_headerp->addr_size; |
| 24964 | } |
| 24965 | |
| 24966 | /* Return the offset size given in the compilation unit header for CU. */ |
| 24967 | |
| 24968 | int |
| 24969 | dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data *per_cu) |
| 24970 | { |
| 24971 | struct comp_unit_head cu_header_local; |
| 24972 | const struct comp_unit_head *cu_headerp; |
| 24973 | |
| 24974 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
| 24975 | |
| 24976 | return cu_headerp->offset_size; |
| 24977 | } |
| 24978 | |
| 24979 | /* See its dwarf2loc.h declaration. */ |
| 24980 | |
| 24981 | int |
| 24982 | dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data *per_cu) |
| 24983 | { |
| 24984 | struct comp_unit_head cu_header_local; |
| 24985 | const struct comp_unit_head *cu_headerp; |
| 24986 | |
| 24987 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
| 24988 | |
| 24989 | if (cu_headerp->version == 2) |
| 24990 | return cu_headerp->addr_size; |
| 24991 | else |
| 24992 | return cu_headerp->offset_size; |
| 24993 | } |
| 24994 | |
| 24995 | /* Return the text offset of the CU. The returned offset comes from |
| 24996 | this CU's objfile. If this objfile came from a separate debuginfo |
| 24997 | file, then the offset may be different from the corresponding |
| 24998 | offset in the parent objfile. */ |
| 24999 | |
| 25000 | CORE_ADDR |
| 25001 | dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data *per_cu) |
| 25002 | { |
| 25003 | struct objfile *objfile = per_cu->dwarf2_per_objfile->objfile; |
| 25004 | |
| 25005 | return ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
| 25006 | } |
| 25007 | |
| 25008 | /* Return DWARF version number of PER_CU. */ |
| 25009 | |
| 25010 | short |
| 25011 | dwarf2_version (struct dwarf2_per_cu_data *per_cu) |
| 25012 | { |
| 25013 | return per_cu->dwarf_version; |
| 25014 | } |
| 25015 | |
| 25016 | /* Locate the .debug_info compilation unit from CU's objfile which contains |
| 25017 | the DIE at OFFSET. Raises an error on failure. */ |
| 25018 | |
| 25019 | static struct dwarf2_per_cu_data * |
| 25020 | dwarf2_find_containing_comp_unit (sect_offset sect_off, |
| 25021 | unsigned int offset_in_dwz, |
| 25022 | struct dwarf2_per_objfile *dwarf2_per_objfile) |
| 25023 | { |
| 25024 | struct dwarf2_per_cu_data *this_cu; |
| 25025 | int low, high; |
| 25026 | const sect_offset *cu_off; |
| 25027 | |
| 25028 | low = 0; |
| 25029 | high = dwarf2_per_objfile->n_comp_units - 1; |
| 25030 | while (high > low) |
| 25031 | { |
| 25032 | struct dwarf2_per_cu_data *mid_cu; |
| 25033 | int mid = low + (high - low) / 2; |
| 25034 | |
| 25035 | mid_cu = dwarf2_per_objfile->all_comp_units[mid]; |
| 25036 | cu_off = &mid_cu->sect_off; |
| 25037 | if (mid_cu->is_dwz > offset_in_dwz |
| 25038 | || (mid_cu->is_dwz == offset_in_dwz && *cu_off >= sect_off)) |
| 25039 | high = mid; |
| 25040 | else |
| 25041 | low = mid + 1; |
| 25042 | } |
| 25043 | gdb_assert (low == high); |
| 25044 | this_cu = dwarf2_per_objfile->all_comp_units[low]; |
| 25045 | cu_off = &this_cu->sect_off; |
| 25046 | if (this_cu->is_dwz != offset_in_dwz || *cu_off > sect_off) |
| 25047 | { |
| 25048 | if (low == 0 || this_cu->is_dwz != offset_in_dwz) |
| 25049 | error (_("Dwarf Error: could not find partial DIE containing " |
| 25050 | "offset 0x%x [in module %s]"), |
| 25051 | to_underlying (sect_off), |
| 25052 | bfd_get_filename (dwarf2_per_objfile->objfile->obfd)); |
| 25053 | |
| 25054 | gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->sect_off |
| 25055 | <= sect_off); |
| 25056 | return dwarf2_per_objfile->all_comp_units[low-1]; |
| 25057 | } |
| 25058 | else |
| 25059 | { |
| 25060 | this_cu = dwarf2_per_objfile->all_comp_units[low]; |
| 25061 | if (low == dwarf2_per_objfile->n_comp_units - 1 |
| 25062 | && sect_off >= this_cu->sect_off + this_cu->length) |
| 25063 | error (_("invalid dwarf2 offset %u"), to_underlying (sect_off)); |
| 25064 | gdb_assert (sect_off < this_cu->sect_off + this_cu->length); |
| 25065 | return this_cu; |
| 25066 | } |
| 25067 | } |
| 25068 | |
| 25069 | /* Initialize dwarf2_cu CU, owned by PER_CU. */ |
| 25070 | |
| 25071 | dwarf2_cu::dwarf2_cu (struct dwarf2_per_cu_data *per_cu_) |
| 25072 | : per_cu (per_cu_), |
| 25073 | mark (0), |
| 25074 | has_loclist (0), |
| 25075 | checked_producer (0), |
| 25076 | producer_is_gxx_lt_4_6 (0), |
| 25077 | producer_is_gcc_lt_4_3 (0), |
| 25078 | producer_is_icc_lt_14 (0), |
| 25079 | processing_has_namespace_info (0) |
| 25080 | { |
| 25081 | per_cu->cu = this; |
| 25082 | } |
| 25083 | |
| 25084 | /* Destroy a dwarf2_cu. */ |
| 25085 | |
| 25086 | dwarf2_cu::~dwarf2_cu () |
| 25087 | { |
| 25088 | per_cu->cu = NULL; |
| 25089 | } |
| 25090 | |
| 25091 | /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */ |
| 25092 | |
| 25093 | static void |
| 25094 | prepare_one_comp_unit (struct dwarf2_cu *cu, struct die_info *comp_unit_die, |
| 25095 | enum language pretend_language) |
| 25096 | { |
| 25097 | struct attribute *attr; |
| 25098 | |
| 25099 | /* Set the language we're debugging. */ |
| 25100 | attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu); |
| 25101 | if (attr) |
| 25102 | set_cu_language (DW_UNSND (attr), cu); |
| 25103 | else |
| 25104 | { |
| 25105 | cu->language = pretend_language; |
| 25106 | cu->language_defn = language_def (cu->language); |
| 25107 | } |
| 25108 | |
| 25109 | cu->producer = dwarf2_string_attr (comp_unit_die, DW_AT_producer, cu); |
| 25110 | } |
| 25111 | |
| 25112 | /* Free all cached compilation units. */ |
| 25113 | |
| 25114 | static void |
| 25115 | free_cached_comp_units (void *data) |
| 25116 | { |
| 25117 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 25118 | = (struct dwarf2_per_objfile *) data; |
| 25119 | |
| 25120 | dwarf2_per_objfile->free_cached_comp_units (); |
| 25121 | } |
| 25122 | |
| 25123 | /* Increase the age counter on each cached compilation unit, and free |
| 25124 | any that are too old. */ |
| 25125 | |
| 25126 | static void |
| 25127 | age_cached_comp_units (struct dwarf2_per_objfile *dwarf2_per_objfile) |
| 25128 | { |
| 25129 | struct dwarf2_per_cu_data *per_cu, **last_chain; |
| 25130 | |
| 25131 | dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain); |
| 25132 | per_cu = dwarf2_per_objfile->read_in_chain; |
| 25133 | while (per_cu != NULL) |
| 25134 | { |
| 25135 | per_cu->cu->last_used ++; |
| 25136 | if (per_cu->cu->last_used <= dwarf_max_cache_age) |
| 25137 | dwarf2_mark (per_cu->cu); |
| 25138 | per_cu = per_cu->cu->read_in_chain; |
| 25139 | } |
| 25140 | |
| 25141 | per_cu = dwarf2_per_objfile->read_in_chain; |
| 25142 | last_chain = &dwarf2_per_objfile->read_in_chain; |
| 25143 | while (per_cu != NULL) |
| 25144 | { |
| 25145 | struct dwarf2_per_cu_data *next_cu; |
| 25146 | |
| 25147 | next_cu = per_cu->cu->read_in_chain; |
| 25148 | |
| 25149 | if (!per_cu->cu->mark) |
| 25150 | { |
| 25151 | delete per_cu->cu; |
| 25152 | *last_chain = next_cu; |
| 25153 | } |
| 25154 | else |
| 25155 | last_chain = &per_cu->cu->read_in_chain; |
| 25156 | |
| 25157 | per_cu = next_cu; |
| 25158 | } |
| 25159 | } |
| 25160 | |
| 25161 | /* Remove a single compilation unit from the cache. */ |
| 25162 | |
| 25163 | static void |
| 25164 | free_one_cached_comp_unit (struct dwarf2_per_cu_data *target_per_cu) |
| 25165 | { |
| 25166 | struct dwarf2_per_cu_data *per_cu, **last_chain; |
| 25167 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 25168 | = target_per_cu->dwarf2_per_objfile; |
| 25169 | |
| 25170 | per_cu = dwarf2_per_objfile->read_in_chain; |
| 25171 | last_chain = &dwarf2_per_objfile->read_in_chain; |
| 25172 | while (per_cu != NULL) |
| 25173 | { |
| 25174 | struct dwarf2_per_cu_data *next_cu; |
| 25175 | |
| 25176 | next_cu = per_cu->cu->read_in_chain; |
| 25177 | |
| 25178 | if (per_cu == target_per_cu) |
| 25179 | { |
| 25180 | delete per_cu->cu; |
| 25181 | per_cu->cu = NULL; |
| 25182 | *last_chain = next_cu; |
| 25183 | break; |
| 25184 | } |
| 25185 | else |
| 25186 | last_chain = &per_cu->cu->read_in_chain; |
| 25187 | |
| 25188 | per_cu = next_cu; |
| 25189 | } |
| 25190 | } |
| 25191 | |
| 25192 | /* Release all extra memory associated with OBJFILE. */ |
| 25193 | |
| 25194 | void |
| 25195 | dwarf2_free_objfile (struct objfile *objfile) |
| 25196 | { |
| 25197 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 25198 | = get_dwarf2_per_objfile (objfile); |
| 25199 | |
| 25200 | if (dwarf2_per_objfile == NULL) |
| 25201 | return; |
| 25202 | |
| 25203 | dwarf2_per_objfile->~dwarf2_per_objfile (); |
| 25204 | } |
| 25205 | |
| 25206 | /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer. |
| 25207 | We store these in a hash table separate from the DIEs, and preserve them |
| 25208 | when the DIEs are flushed out of cache. |
| 25209 | |
| 25210 | The CU "per_cu" pointer is needed because offset alone is not enough to |
| 25211 | uniquely identify the type. A file may have multiple .debug_types sections, |
| 25212 | or the type may come from a DWO file. Furthermore, while it's more logical |
| 25213 | to use per_cu->section+offset, with Fission the section with the data is in |
| 25214 | the DWO file but we don't know that section at the point we need it. |
| 25215 | We have to use something in dwarf2_per_cu_data (or the pointer to it) |
| 25216 | because we can enter the lookup routine, get_die_type_at_offset, from |
| 25217 | outside this file, and thus won't necessarily have PER_CU->cu. |
| 25218 | Fortunately, PER_CU is stable for the life of the objfile. */ |
| 25219 | |
| 25220 | struct dwarf2_per_cu_offset_and_type |
| 25221 | { |
| 25222 | const struct dwarf2_per_cu_data *per_cu; |
| 25223 | sect_offset sect_off; |
| 25224 | struct type *type; |
| 25225 | }; |
| 25226 | |
| 25227 | /* Hash function for a dwarf2_per_cu_offset_and_type. */ |
| 25228 | |
| 25229 | static hashval_t |
| 25230 | per_cu_offset_and_type_hash (const void *item) |
| 25231 | { |
| 25232 | const struct dwarf2_per_cu_offset_and_type *ofs |
| 25233 | = (const struct dwarf2_per_cu_offset_and_type *) item; |
| 25234 | |
| 25235 | return (uintptr_t) ofs->per_cu + to_underlying (ofs->sect_off); |
| 25236 | } |
| 25237 | |
| 25238 | /* Equality function for a dwarf2_per_cu_offset_and_type. */ |
| 25239 | |
| 25240 | static int |
| 25241 | per_cu_offset_and_type_eq (const void *item_lhs, const void *item_rhs) |
| 25242 | { |
| 25243 | const struct dwarf2_per_cu_offset_and_type *ofs_lhs |
| 25244 | = (const struct dwarf2_per_cu_offset_and_type *) item_lhs; |
| 25245 | const struct dwarf2_per_cu_offset_and_type *ofs_rhs |
| 25246 | = (const struct dwarf2_per_cu_offset_and_type *) item_rhs; |
| 25247 | |
| 25248 | return (ofs_lhs->per_cu == ofs_rhs->per_cu |
| 25249 | && ofs_lhs->sect_off == ofs_rhs->sect_off); |
| 25250 | } |
| 25251 | |
| 25252 | /* Set the type associated with DIE to TYPE. Save it in CU's hash |
| 25253 | table if necessary. For convenience, return TYPE. |
| 25254 | |
| 25255 | The DIEs reading must have careful ordering to: |
| 25256 | * Not cause infite loops trying to read in DIEs as a prerequisite for |
| 25257 | reading current DIE. |
| 25258 | * Not trying to dereference contents of still incompletely read in types |
| 25259 | while reading in other DIEs. |
| 25260 | * Enable referencing still incompletely read in types just by a pointer to |
| 25261 | the type without accessing its fields. |
| 25262 | |
| 25263 | Therefore caller should follow these rules: |
| 25264 | * Try to fetch any prerequisite types we may need to build this DIE type |
| 25265 | before building the type and calling set_die_type. |
| 25266 | * After building type call set_die_type for current DIE as soon as |
| 25267 | possible before fetching more types to complete the current type. |
| 25268 | * Make the type as complete as possible before fetching more types. */ |
| 25269 | |
| 25270 | static struct type * |
| 25271 | set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu) |
| 25272 | { |
| 25273 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 25274 | = cu->per_cu->dwarf2_per_objfile; |
| 25275 | struct dwarf2_per_cu_offset_and_type **slot, ofs; |
| 25276 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 25277 | struct attribute *attr; |
| 25278 | struct dynamic_prop prop; |
| 25279 | |
| 25280 | /* For Ada types, make sure that the gnat-specific data is always |
| 25281 | initialized (if not already set). There are a few types where |
| 25282 | we should not be doing so, because the type-specific area is |
| 25283 | already used to hold some other piece of info (eg: TYPE_CODE_FLT |
| 25284 | where the type-specific area is used to store the floatformat). |
| 25285 | But this is not a problem, because the gnat-specific information |
| 25286 | is actually not needed for these types. */ |
| 25287 | if (need_gnat_info (cu) |
| 25288 | && TYPE_CODE (type) != TYPE_CODE_FUNC |
| 25289 | && TYPE_CODE (type) != TYPE_CODE_FLT |
| 25290 | && TYPE_CODE (type) != TYPE_CODE_METHODPTR |
| 25291 | && TYPE_CODE (type) != TYPE_CODE_MEMBERPTR |
| 25292 | && TYPE_CODE (type) != TYPE_CODE_METHOD |
| 25293 | && !HAVE_GNAT_AUX_INFO (type)) |
| 25294 | INIT_GNAT_SPECIFIC (type); |
| 25295 | |
| 25296 | /* Read DW_AT_allocated and set in type. */ |
| 25297 | attr = dwarf2_attr (die, DW_AT_allocated, cu); |
| 25298 | if (attr_form_is_block (attr)) |
| 25299 | { |
| 25300 | if (attr_to_dynamic_prop (attr, die, cu, &prop)) |
| 25301 | add_dyn_prop (DYN_PROP_ALLOCATED, prop, type); |
| 25302 | } |
| 25303 | else if (attr != NULL) |
| 25304 | { |
| 25305 | complaint (&symfile_complaints, |
| 25306 | _("DW_AT_allocated has the wrong form (%s) at DIE 0x%x"), |
| 25307 | (attr != NULL ? dwarf_form_name (attr->form) : "n/a"), |
| 25308 | to_underlying (die->sect_off)); |
| 25309 | } |
| 25310 | |
| 25311 | /* Read DW_AT_associated and set in type. */ |
| 25312 | attr = dwarf2_attr (die, DW_AT_associated, cu); |
| 25313 | if (attr_form_is_block (attr)) |
| 25314 | { |
| 25315 | if (attr_to_dynamic_prop (attr, die, cu, &prop)) |
| 25316 | add_dyn_prop (DYN_PROP_ASSOCIATED, prop, type); |
| 25317 | } |
| 25318 | else if (attr != NULL) |
| 25319 | { |
| 25320 | complaint (&symfile_complaints, |
| 25321 | _("DW_AT_associated has the wrong form (%s) at DIE 0x%x"), |
| 25322 | (attr != NULL ? dwarf_form_name (attr->form) : "n/a"), |
| 25323 | to_underlying (die->sect_off)); |
| 25324 | } |
| 25325 | |
| 25326 | /* Read DW_AT_data_location and set in type. */ |
| 25327 | attr = dwarf2_attr (die, DW_AT_data_location, cu); |
| 25328 | if (attr_to_dynamic_prop (attr, die, cu, &prop)) |
| 25329 | add_dyn_prop (DYN_PROP_DATA_LOCATION, prop, type); |
| 25330 | |
| 25331 | if (dwarf2_per_objfile->die_type_hash == NULL) |
| 25332 | { |
| 25333 | dwarf2_per_objfile->die_type_hash = |
| 25334 | htab_create_alloc_ex (127, |
| 25335 | per_cu_offset_and_type_hash, |
| 25336 | per_cu_offset_and_type_eq, |
| 25337 | NULL, |
| 25338 | &objfile->objfile_obstack, |
| 25339 | hashtab_obstack_allocate, |
| 25340 | dummy_obstack_deallocate); |
| 25341 | } |
| 25342 | |
| 25343 | ofs.per_cu = cu->per_cu; |
| 25344 | ofs.sect_off = die->sect_off; |
| 25345 | ofs.type = type; |
| 25346 | slot = (struct dwarf2_per_cu_offset_and_type **) |
| 25347 | htab_find_slot (dwarf2_per_objfile->die_type_hash, &ofs, INSERT); |
| 25348 | if (*slot) |
| 25349 | complaint (&symfile_complaints, |
| 25350 | _("A problem internal to GDB: DIE 0x%x has type already set"), |
| 25351 | to_underlying (die->sect_off)); |
| 25352 | *slot = XOBNEW (&objfile->objfile_obstack, |
| 25353 | struct dwarf2_per_cu_offset_and_type); |
| 25354 | **slot = ofs; |
| 25355 | return type; |
| 25356 | } |
| 25357 | |
| 25358 | /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash, |
| 25359 | or return NULL if the die does not have a saved type. */ |
| 25360 | |
| 25361 | static struct type * |
| 25362 | get_die_type_at_offset (sect_offset sect_off, |
| 25363 | struct dwarf2_per_cu_data *per_cu) |
| 25364 | { |
| 25365 | struct dwarf2_per_cu_offset_and_type *slot, ofs; |
| 25366 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
| 25367 | |
| 25368 | if (dwarf2_per_objfile->die_type_hash == NULL) |
| 25369 | return NULL; |
| 25370 | |
| 25371 | ofs.per_cu = per_cu; |
| 25372 | ofs.sect_off = sect_off; |
| 25373 | slot = ((struct dwarf2_per_cu_offset_and_type *) |
| 25374 | htab_find (dwarf2_per_objfile->die_type_hash, &ofs)); |
| 25375 | if (slot) |
| 25376 | return slot->type; |
| 25377 | else |
| 25378 | return NULL; |
| 25379 | } |
| 25380 | |
| 25381 | /* Look up the type for DIE in CU in die_type_hash, |
| 25382 | or return NULL if DIE does not have a saved type. */ |
| 25383 | |
| 25384 | static struct type * |
| 25385 | get_die_type (struct die_info *die, struct dwarf2_cu *cu) |
| 25386 | { |
| 25387 | return get_die_type_at_offset (die->sect_off, cu->per_cu); |
| 25388 | } |
| 25389 | |
| 25390 | /* Add a dependence relationship from CU to REF_PER_CU. */ |
| 25391 | |
| 25392 | static void |
| 25393 | dwarf2_add_dependence (struct dwarf2_cu *cu, |
| 25394 | struct dwarf2_per_cu_data *ref_per_cu) |
| 25395 | { |
| 25396 | void **slot; |
| 25397 | |
| 25398 | if (cu->dependencies == NULL) |
| 25399 | cu->dependencies |
| 25400 | = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer, |
| 25401 | NULL, &cu->comp_unit_obstack, |
| 25402 | hashtab_obstack_allocate, |
| 25403 | dummy_obstack_deallocate); |
| 25404 | |
| 25405 | slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT); |
| 25406 | if (*slot == NULL) |
| 25407 | *slot = ref_per_cu; |
| 25408 | } |
| 25409 | |
| 25410 | /* Subroutine of dwarf2_mark to pass to htab_traverse. |
| 25411 | Set the mark field in every compilation unit in the |
| 25412 | cache that we must keep because we are keeping CU. */ |
| 25413 | |
| 25414 | static int |
| 25415 | dwarf2_mark_helper (void **slot, void *data) |
| 25416 | { |
| 25417 | struct dwarf2_per_cu_data *per_cu; |
| 25418 | |
| 25419 | per_cu = (struct dwarf2_per_cu_data *) *slot; |
| 25420 | |
| 25421 | /* cu->dependencies references may not yet have been ever read if QUIT aborts |
| 25422 | reading of the chain. As such dependencies remain valid it is not much |
| 25423 | useful to track and undo them during QUIT cleanups. */ |
| 25424 | if (per_cu->cu == NULL) |
| 25425 | return 1; |
| 25426 | |
| 25427 | if (per_cu->cu->mark) |
| 25428 | return 1; |
| 25429 | per_cu->cu->mark = 1; |
| 25430 | |
| 25431 | if (per_cu->cu->dependencies != NULL) |
| 25432 | htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL); |
| 25433 | |
| 25434 | return 1; |
| 25435 | } |
| 25436 | |
| 25437 | /* Set the mark field in CU and in every other compilation unit in the |
| 25438 | cache that we must keep because we are keeping CU. */ |
| 25439 | |
| 25440 | static void |
| 25441 | dwarf2_mark (struct dwarf2_cu *cu) |
| 25442 | { |
| 25443 | if (cu->mark) |
| 25444 | return; |
| 25445 | cu->mark = 1; |
| 25446 | if (cu->dependencies != NULL) |
| 25447 | htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL); |
| 25448 | } |
| 25449 | |
| 25450 | static void |
| 25451 | dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu) |
| 25452 | { |
| 25453 | while (per_cu) |
| 25454 | { |
| 25455 | per_cu->cu->mark = 0; |
| 25456 | per_cu = per_cu->cu->read_in_chain; |
| 25457 | } |
| 25458 | } |
| 25459 | |
| 25460 | /* Trivial hash function for partial_die_info: the hash value of a DIE |
| 25461 | is its offset in .debug_info for this objfile. */ |
| 25462 | |
| 25463 | static hashval_t |
| 25464 | partial_die_hash (const void *item) |
| 25465 | { |
| 25466 | const struct partial_die_info *part_die |
| 25467 | = (const struct partial_die_info *) item; |
| 25468 | |
| 25469 | return to_underlying (part_die->sect_off); |
| 25470 | } |
| 25471 | |
| 25472 | /* Trivial comparison function for partial_die_info structures: two DIEs |
| 25473 | are equal if they have the same offset. */ |
| 25474 | |
| 25475 | static int |
| 25476 | partial_die_eq (const void *item_lhs, const void *item_rhs) |
| 25477 | { |
| 25478 | const struct partial_die_info *part_die_lhs |
| 25479 | = (const struct partial_die_info *) item_lhs; |
| 25480 | const struct partial_die_info *part_die_rhs |
| 25481 | = (const struct partial_die_info *) item_rhs; |
| 25482 | |
| 25483 | return part_die_lhs->sect_off == part_die_rhs->sect_off; |
| 25484 | } |
| 25485 | |
| 25486 | static struct cmd_list_element *set_dwarf_cmdlist; |
| 25487 | static struct cmd_list_element *show_dwarf_cmdlist; |
| 25488 | |
| 25489 | static void |
| 25490 | set_dwarf_cmd (const char *args, int from_tty) |
| 25491 | { |
| 25492 | help_list (set_dwarf_cmdlist, "maintenance set dwarf ", all_commands, |
| 25493 | gdb_stdout); |
| 25494 | } |
| 25495 | |
| 25496 | static void |
| 25497 | show_dwarf_cmd (const char *args, int from_tty) |
| 25498 | { |
| 25499 | cmd_show_list (show_dwarf_cmdlist, from_tty, ""); |
| 25500 | } |
| 25501 | |
| 25502 | /* The "save gdb-index" command. */ |
| 25503 | |
| 25504 | /* Write SIZE bytes from the buffer pointed to by DATA to FILE, with |
| 25505 | error checking. */ |
| 25506 | |
| 25507 | static void |
| 25508 | file_write (FILE *file, const void *data, size_t size) |
| 25509 | { |
| 25510 | if (fwrite (data, 1, size, file) != size) |
| 25511 | error (_("couldn't data write to file")); |
| 25512 | } |
| 25513 | |
| 25514 | /* Write the contents of VEC to FILE, with error checking. */ |
| 25515 | |
| 25516 | template<typename Elem, typename Alloc> |
| 25517 | static void |
| 25518 | file_write (FILE *file, const std::vector<Elem, Alloc> &vec) |
| 25519 | { |
| 25520 | file_write (file, vec.data (), vec.size () * sizeof (vec[0])); |
| 25521 | } |
| 25522 | |
| 25523 | /* In-memory buffer to prepare data to be written later to a file. */ |
| 25524 | class data_buf |
| 25525 | { |
| 25526 | public: |
| 25527 | /* Copy DATA to the end of the buffer. */ |
| 25528 | template<typename T> |
| 25529 | void append_data (const T &data) |
| 25530 | { |
| 25531 | std::copy (reinterpret_cast<const gdb_byte *> (&data), |
| 25532 | reinterpret_cast<const gdb_byte *> (&data + 1), |
| 25533 | grow (sizeof (data))); |
| 25534 | } |
| 25535 | |
| 25536 | /* Copy CSTR (a zero-terminated string) to the end of buffer. The |
| 25537 | terminating zero is appended too. */ |
| 25538 | void append_cstr0 (const char *cstr) |
| 25539 | { |
| 25540 | const size_t size = strlen (cstr) + 1; |
| 25541 | std::copy (cstr, cstr + size, grow (size)); |
| 25542 | } |
| 25543 | |
| 25544 | /* Store INPUT as ULEB128 to the end of buffer. */ |
| 25545 | void append_unsigned_leb128 (ULONGEST input) |
| 25546 | { |
| 25547 | for (;;) |
| 25548 | { |
| 25549 | gdb_byte output = input & 0x7f; |
| 25550 | input >>= 7; |
| 25551 | if (input) |
| 25552 | output |= 0x80; |
| 25553 | append_data (output); |
| 25554 | if (input == 0) |
| 25555 | break; |
| 25556 | } |
| 25557 | } |
| 25558 | |
| 25559 | /* Accept a host-format integer in VAL and append it to the buffer |
| 25560 | as a target-format integer which is LEN bytes long. */ |
| 25561 | void append_uint (size_t len, bfd_endian byte_order, ULONGEST val) |
| 25562 | { |
| 25563 | ::store_unsigned_integer (grow (len), len, byte_order, val); |
| 25564 | } |
| 25565 | |
| 25566 | /* Return the size of the buffer. */ |
| 25567 | size_t size () const |
| 25568 | { |
| 25569 | return m_vec.size (); |
| 25570 | } |
| 25571 | |
| 25572 | /* Return true iff the buffer is empty. */ |
| 25573 | bool empty () const |
| 25574 | { |
| 25575 | return m_vec.empty (); |
| 25576 | } |
| 25577 | |
| 25578 | /* Write the buffer to FILE. */ |
| 25579 | void file_write (FILE *file) const |
| 25580 | { |
| 25581 | ::file_write (file, m_vec); |
| 25582 | } |
| 25583 | |
| 25584 | private: |
| 25585 | /* Grow SIZE bytes at the end of the buffer. Returns a pointer to |
| 25586 | the start of the new block. */ |
| 25587 | gdb_byte *grow (size_t size) |
| 25588 | { |
| 25589 | m_vec.resize (m_vec.size () + size); |
| 25590 | return &*m_vec.end () - size; |
| 25591 | } |
| 25592 | |
| 25593 | gdb::byte_vector m_vec; |
| 25594 | }; |
| 25595 | |
| 25596 | /* An entry in the symbol table. */ |
| 25597 | struct symtab_index_entry |
| 25598 | { |
| 25599 | /* The name of the symbol. */ |
| 25600 | const char *name; |
| 25601 | /* The offset of the name in the constant pool. */ |
| 25602 | offset_type index_offset; |
| 25603 | /* A sorted vector of the indices of all the CUs that hold an object |
| 25604 | of this name. */ |
| 25605 | std::vector<offset_type> cu_indices; |
| 25606 | }; |
| 25607 | |
| 25608 | /* The symbol table. This is a power-of-2-sized hash table. */ |
| 25609 | struct mapped_symtab |
| 25610 | { |
| 25611 | mapped_symtab () |
| 25612 | { |
| 25613 | data.resize (1024); |
| 25614 | } |
| 25615 | |
| 25616 | offset_type n_elements = 0; |
| 25617 | std::vector<symtab_index_entry> data; |
| 25618 | }; |
| 25619 | |
| 25620 | /* Find a slot in SYMTAB for the symbol NAME. Returns a reference to |
| 25621 | the slot. |
| 25622 | |
| 25623 | Function is used only during write_hash_table so no index format backward |
| 25624 | compatibility is needed. */ |
| 25625 | |
| 25626 | static symtab_index_entry & |
| 25627 | find_slot (struct mapped_symtab *symtab, const char *name) |
| 25628 | { |
| 25629 | offset_type index, step, hash = mapped_index_string_hash (INT_MAX, name); |
| 25630 | |
| 25631 | index = hash & (symtab->data.size () - 1); |
| 25632 | step = ((hash * 17) & (symtab->data.size () - 1)) | 1; |
| 25633 | |
| 25634 | for (;;) |
| 25635 | { |
| 25636 | if (symtab->data[index].name == NULL |
| 25637 | || strcmp (name, symtab->data[index].name) == 0) |
| 25638 | return symtab->data[index]; |
| 25639 | index = (index + step) & (symtab->data.size () - 1); |
| 25640 | } |
| 25641 | } |
| 25642 | |
| 25643 | /* Expand SYMTAB's hash table. */ |
| 25644 | |
| 25645 | static void |
| 25646 | hash_expand (struct mapped_symtab *symtab) |
| 25647 | { |
| 25648 | auto old_entries = std::move (symtab->data); |
| 25649 | |
| 25650 | symtab->data.clear (); |
| 25651 | symtab->data.resize (old_entries.size () * 2); |
| 25652 | |
| 25653 | for (auto &it : old_entries) |
| 25654 | if (it.name != NULL) |
| 25655 | { |
| 25656 | auto &ref = find_slot (symtab, it.name); |
| 25657 | ref = std::move (it); |
| 25658 | } |
| 25659 | } |
| 25660 | |
| 25661 | /* Add an entry to SYMTAB. NAME is the name of the symbol. |
| 25662 | CU_INDEX is the index of the CU in which the symbol appears. |
| 25663 | IS_STATIC is one if the symbol is static, otherwise zero (global). */ |
| 25664 | |
| 25665 | static void |
| 25666 | add_index_entry (struct mapped_symtab *symtab, const char *name, |
| 25667 | int is_static, gdb_index_symbol_kind kind, |
| 25668 | offset_type cu_index) |
| 25669 | { |
| 25670 | offset_type cu_index_and_attrs; |
| 25671 | |
| 25672 | ++symtab->n_elements; |
| 25673 | if (4 * symtab->n_elements / 3 >= symtab->data.size ()) |
| 25674 | hash_expand (symtab); |
| 25675 | |
| 25676 | symtab_index_entry &slot = find_slot (symtab, name); |
| 25677 | if (slot.name == NULL) |
| 25678 | { |
| 25679 | slot.name = name; |
| 25680 | /* index_offset is set later. */ |
| 25681 | } |
| 25682 | |
| 25683 | cu_index_and_attrs = 0; |
| 25684 | DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs, cu_index); |
| 25685 | DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs, is_static); |
| 25686 | DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs, kind); |
| 25687 | |
| 25688 | /* We don't want to record an index value twice as we want to avoid the |
| 25689 | duplication. |
| 25690 | We process all global symbols and then all static symbols |
| 25691 | (which would allow us to avoid the duplication by only having to check |
| 25692 | the last entry pushed), but a symbol could have multiple kinds in one CU. |
| 25693 | To keep things simple we don't worry about the duplication here and |
| 25694 | sort and uniqufy the list after we've processed all symbols. */ |
| 25695 | slot.cu_indices.push_back (cu_index_and_attrs); |
| 25696 | } |
| 25697 | |
| 25698 | /* Sort and remove duplicates of all symbols' cu_indices lists. */ |
| 25699 | |
| 25700 | static void |
| 25701 | uniquify_cu_indices (struct mapped_symtab *symtab) |
| 25702 | { |
| 25703 | for (auto &entry : symtab->data) |
| 25704 | { |
| 25705 | if (entry.name != NULL && !entry.cu_indices.empty ()) |
| 25706 | { |
| 25707 | auto &cu_indices = entry.cu_indices; |
| 25708 | std::sort (cu_indices.begin (), cu_indices.end ()); |
| 25709 | auto from = std::unique (cu_indices.begin (), cu_indices.end ()); |
| 25710 | cu_indices.erase (from, cu_indices.end ()); |
| 25711 | } |
| 25712 | } |
| 25713 | } |
| 25714 | |
| 25715 | /* A form of 'const char *' suitable for container keys. Only the |
| 25716 | pointer is stored. The strings themselves are compared, not the |
| 25717 | pointers. */ |
| 25718 | class c_str_view |
| 25719 | { |
| 25720 | public: |
| 25721 | c_str_view (const char *cstr) |
| 25722 | : m_cstr (cstr) |
| 25723 | {} |
| 25724 | |
| 25725 | bool operator== (const c_str_view &other) const |
| 25726 | { |
| 25727 | return strcmp (m_cstr, other.m_cstr) == 0; |
| 25728 | } |
| 25729 | |
| 25730 | /* Return the underlying C string. Note, the returned string is |
| 25731 | only a reference with lifetime of this object. */ |
| 25732 | const char *c_str () const |
| 25733 | { |
| 25734 | return m_cstr; |
| 25735 | } |
| 25736 | |
| 25737 | private: |
| 25738 | friend class c_str_view_hasher; |
| 25739 | const char *const m_cstr; |
| 25740 | }; |
| 25741 | |
| 25742 | /* A std::unordered_map::hasher for c_str_view that uses the right |
| 25743 | hash function for strings in a mapped index. */ |
| 25744 | class c_str_view_hasher |
| 25745 | { |
| 25746 | public: |
| 25747 | size_t operator () (const c_str_view &x) const |
| 25748 | { |
| 25749 | return mapped_index_string_hash (INT_MAX, x.m_cstr); |
| 25750 | } |
| 25751 | }; |
| 25752 | |
| 25753 | /* A std::unordered_map::hasher for std::vector<>. */ |
| 25754 | template<typename T> |
| 25755 | class vector_hasher |
| 25756 | { |
| 25757 | public: |
| 25758 | size_t operator () (const std::vector<T> &key) const |
| 25759 | { |
| 25760 | return iterative_hash (key.data (), |
| 25761 | sizeof (key.front ()) * key.size (), 0); |
| 25762 | } |
| 25763 | }; |
| 25764 | |
| 25765 | /* Write the mapped hash table SYMTAB to the data buffer OUTPUT, with |
| 25766 | constant pool entries going into the data buffer CPOOL. */ |
| 25767 | |
| 25768 | static void |
| 25769 | write_hash_table (mapped_symtab *symtab, data_buf &output, data_buf &cpool) |
| 25770 | { |
| 25771 | { |
| 25772 | /* Elements are sorted vectors of the indices of all the CUs that |
| 25773 | hold an object of this name. */ |
| 25774 | std::unordered_map<std::vector<offset_type>, offset_type, |
| 25775 | vector_hasher<offset_type>> |
| 25776 | symbol_hash_table; |
| 25777 | |
| 25778 | /* We add all the index vectors to the constant pool first, to |
| 25779 | ensure alignment is ok. */ |
| 25780 | for (symtab_index_entry &entry : symtab->data) |
| 25781 | { |
| 25782 | if (entry.name == NULL) |
| 25783 | continue; |
| 25784 | gdb_assert (entry.index_offset == 0); |
| 25785 | |
| 25786 | /* Finding before inserting is faster than always trying to |
| 25787 | insert, because inserting always allocates a node, does the |
| 25788 | lookup, and then destroys the new node if another node |
| 25789 | already had the same key. C++17 try_emplace will avoid |
| 25790 | this. */ |
| 25791 | const auto found |
| 25792 | = symbol_hash_table.find (entry.cu_indices); |
| 25793 | if (found != symbol_hash_table.end ()) |
| 25794 | { |
| 25795 | entry.index_offset = found->second; |
| 25796 | continue; |
| 25797 | } |
| 25798 | |
| 25799 | symbol_hash_table.emplace (entry.cu_indices, cpool.size ()); |
| 25800 | entry.index_offset = cpool.size (); |
| 25801 | cpool.append_data (MAYBE_SWAP (entry.cu_indices.size ())); |
| 25802 | for (const auto index : entry.cu_indices) |
| 25803 | cpool.append_data (MAYBE_SWAP (index)); |
| 25804 | } |
| 25805 | } |
| 25806 | |
| 25807 | /* Now write out the hash table. */ |
| 25808 | std::unordered_map<c_str_view, offset_type, c_str_view_hasher> str_table; |
| 25809 | for (const auto &entry : symtab->data) |
| 25810 | { |
| 25811 | offset_type str_off, vec_off; |
| 25812 | |
| 25813 | if (entry.name != NULL) |
| 25814 | { |
| 25815 | const auto insertpair = str_table.emplace (entry.name, cpool.size ()); |
| 25816 | if (insertpair.second) |
| 25817 | cpool.append_cstr0 (entry.name); |
| 25818 | str_off = insertpair.first->second; |
| 25819 | vec_off = entry.index_offset; |
| 25820 | } |
| 25821 | else |
| 25822 | { |
| 25823 | /* While 0 is a valid constant pool index, it is not valid |
| 25824 | to have 0 for both offsets. */ |
| 25825 | str_off = 0; |
| 25826 | vec_off = 0; |
| 25827 | } |
| 25828 | |
| 25829 | output.append_data (MAYBE_SWAP (str_off)); |
| 25830 | output.append_data (MAYBE_SWAP (vec_off)); |
| 25831 | } |
| 25832 | } |
| 25833 | |
| 25834 | typedef std::unordered_map<partial_symtab *, unsigned int> psym_index_map; |
| 25835 | |
| 25836 | /* Helper struct for building the address table. */ |
| 25837 | struct addrmap_index_data |
| 25838 | { |
| 25839 | addrmap_index_data (data_buf &addr_vec_, psym_index_map &cu_index_htab_) |
| 25840 | : addr_vec (addr_vec_), cu_index_htab (cu_index_htab_) |
| 25841 | {} |
| 25842 | |
| 25843 | struct objfile *objfile; |
| 25844 | data_buf &addr_vec; |
| 25845 | psym_index_map &cu_index_htab; |
| 25846 | |
| 25847 | /* Non-zero if the previous_* fields are valid. |
| 25848 | We can't write an entry until we see the next entry (since it is only then |
| 25849 | that we know the end of the entry). */ |
| 25850 | int previous_valid; |
| 25851 | /* Index of the CU in the table of all CUs in the index file. */ |
| 25852 | unsigned int previous_cu_index; |
| 25853 | /* Start address of the CU. */ |
| 25854 | CORE_ADDR previous_cu_start; |
| 25855 | }; |
| 25856 | |
| 25857 | /* Write an address entry to ADDR_VEC. */ |
| 25858 | |
| 25859 | static void |
| 25860 | add_address_entry (struct objfile *objfile, data_buf &addr_vec, |
| 25861 | CORE_ADDR start, CORE_ADDR end, unsigned int cu_index) |
| 25862 | { |
| 25863 | CORE_ADDR baseaddr; |
| 25864 | |
| 25865 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
| 25866 | |
| 25867 | addr_vec.append_uint (8, BFD_ENDIAN_LITTLE, start - baseaddr); |
| 25868 | addr_vec.append_uint (8, BFD_ENDIAN_LITTLE, end - baseaddr); |
| 25869 | addr_vec.append_data (MAYBE_SWAP (cu_index)); |
| 25870 | } |
| 25871 | |
| 25872 | /* Worker function for traversing an addrmap to build the address table. */ |
| 25873 | |
| 25874 | static int |
| 25875 | add_address_entry_worker (void *datap, CORE_ADDR start_addr, void *obj) |
| 25876 | { |
| 25877 | struct addrmap_index_data *data = (struct addrmap_index_data *) datap; |
| 25878 | struct partial_symtab *pst = (struct partial_symtab *) obj; |
| 25879 | |
| 25880 | if (data->previous_valid) |
| 25881 | add_address_entry (data->objfile, data->addr_vec, |
| 25882 | data->previous_cu_start, start_addr, |
| 25883 | data->previous_cu_index); |
| 25884 | |
| 25885 | data->previous_cu_start = start_addr; |
| 25886 | if (pst != NULL) |
| 25887 | { |
| 25888 | const auto it = data->cu_index_htab.find (pst); |
| 25889 | gdb_assert (it != data->cu_index_htab.cend ()); |
| 25890 | data->previous_cu_index = it->second; |
| 25891 | data->previous_valid = 1; |
| 25892 | } |
| 25893 | else |
| 25894 | data->previous_valid = 0; |
| 25895 | |
| 25896 | return 0; |
| 25897 | } |
| 25898 | |
| 25899 | /* Write OBJFILE's address map to ADDR_VEC. |
| 25900 | CU_INDEX_HTAB is used to map addrmap entries to their CU indices |
| 25901 | in the index file. */ |
| 25902 | |
| 25903 | static void |
| 25904 | write_address_map (struct objfile *objfile, data_buf &addr_vec, |
| 25905 | psym_index_map &cu_index_htab) |
| 25906 | { |
| 25907 | struct addrmap_index_data addrmap_index_data (addr_vec, cu_index_htab); |
| 25908 | |
| 25909 | /* When writing the address table, we have to cope with the fact that |
| 25910 | the addrmap iterator only provides the start of a region; we have to |
| 25911 | wait until the next invocation to get the start of the next region. */ |
| 25912 | |
| 25913 | addrmap_index_data.objfile = objfile; |
| 25914 | addrmap_index_data.previous_valid = 0; |
| 25915 | |
| 25916 | addrmap_foreach (objfile->psymtabs_addrmap, add_address_entry_worker, |
| 25917 | &addrmap_index_data); |
| 25918 | |
| 25919 | /* It's highly unlikely the last entry (end address = 0xff...ff) |
| 25920 | is valid, but we should still handle it. |
| 25921 | The end address is recorded as the start of the next region, but that |
| 25922 | doesn't work here. To cope we pass 0xff...ff, this is a rare situation |
| 25923 | anyway. */ |
| 25924 | if (addrmap_index_data.previous_valid) |
| 25925 | add_address_entry (objfile, addr_vec, |
| 25926 | addrmap_index_data.previous_cu_start, (CORE_ADDR) -1, |
| 25927 | addrmap_index_data.previous_cu_index); |
| 25928 | } |
| 25929 | |
| 25930 | /* Return the symbol kind of PSYM. */ |
| 25931 | |
| 25932 | static gdb_index_symbol_kind |
| 25933 | symbol_kind (struct partial_symbol *psym) |
| 25934 | { |
| 25935 | domain_enum domain = PSYMBOL_DOMAIN (psym); |
| 25936 | enum address_class aclass = PSYMBOL_CLASS (psym); |
| 25937 | |
| 25938 | switch (domain) |
| 25939 | { |
| 25940 | case VAR_DOMAIN: |
| 25941 | switch (aclass) |
| 25942 | { |
| 25943 | case LOC_BLOCK: |
| 25944 | return GDB_INDEX_SYMBOL_KIND_FUNCTION; |
| 25945 | case LOC_TYPEDEF: |
| 25946 | return GDB_INDEX_SYMBOL_KIND_TYPE; |
| 25947 | case LOC_COMPUTED: |
| 25948 | case LOC_CONST_BYTES: |
| 25949 | case LOC_OPTIMIZED_OUT: |
| 25950 | case LOC_STATIC: |
| 25951 | return GDB_INDEX_SYMBOL_KIND_VARIABLE; |
| 25952 | case LOC_CONST: |
| 25953 | /* Note: It's currently impossible to recognize psyms as enum values |
| 25954 | short of reading the type info. For now punt. */ |
| 25955 | return GDB_INDEX_SYMBOL_KIND_VARIABLE; |
| 25956 | default: |
| 25957 | /* There are other LOC_FOO values that one might want to classify |
| 25958 | as variables, but dwarf2read.c doesn't currently use them. */ |
| 25959 | return GDB_INDEX_SYMBOL_KIND_OTHER; |
| 25960 | } |
| 25961 | case STRUCT_DOMAIN: |
| 25962 | return GDB_INDEX_SYMBOL_KIND_TYPE; |
| 25963 | default: |
| 25964 | return GDB_INDEX_SYMBOL_KIND_OTHER; |
| 25965 | } |
| 25966 | } |
| 25967 | |
| 25968 | /* Add a list of partial symbols to SYMTAB. */ |
| 25969 | |
| 25970 | static void |
| 25971 | write_psymbols (struct mapped_symtab *symtab, |
| 25972 | std::unordered_set<partial_symbol *> &psyms_seen, |
| 25973 | struct partial_symbol **psymp, |
| 25974 | int count, |
| 25975 | offset_type cu_index, |
| 25976 | int is_static) |
| 25977 | { |
| 25978 | for (; count-- > 0; ++psymp) |
| 25979 | { |
| 25980 | struct partial_symbol *psym = *psymp; |
| 25981 | |
| 25982 | if (SYMBOL_LANGUAGE (psym) == language_ada) |
| 25983 | error (_("Ada is not currently supported by the index")); |
| 25984 | |
| 25985 | /* Only add a given psymbol once. */ |
| 25986 | if (psyms_seen.insert (psym).second) |
| 25987 | { |
| 25988 | gdb_index_symbol_kind kind = symbol_kind (psym); |
| 25989 | |
| 25990 | add_index_entry (symtab, SYMBOL_SEARCH_NAME (psym), |
| 25991 | is_static, kind, cu_index); |
| 25992 | } |
| 25993 | } |
| 25994 | } |
| 25995 | |
| 25996 | /* A helper struct used when iterating over debug_types. */ |
| 25997 | struct signatured_type_index_data |
| 25998 | { |
| 25999 | signatured_type_index_data (data_buf &types_list_, |
| 26000 | std::unordered_set<partial_symbol *> &psyms_seen_) |
| 26001 | : types_list (types_list_), psyms_seen (psyms_seen_) |
| 26002 | {} |
| 26003 | |
| 26004 | struct objfile *objfile; |
| 26005 | struct mapped_symtab *symtab; |
| 26006 | data_buf &types_list; |
| 26007 | std::unordered_set<partial_symbol *> &psyms_seen; |
| 26008 | int cu_index; |
| 26009 | }; |
| 26010 | |
| 26011 | /* A helper function that writes a single signatured_type to an |
| 26012 | obstack. */ |
| 26013 | |
| 26014 | static int |
| 26015 | write_one_signatured_type (void **slot, void *d) |
| 26016 | { |
| 26017 | struct signatured_type_index_data *info |
| 26018 | = (struct signatured_type_index_data *) d; |
| 26019 | struct signatured_type *entry = (struct signatured_type *) *slot; |
| 26020 | struct partial_symtab *psymtab = entry->per_cu.v.psymtab; |
| 26021 | |
| 26022 | write_psymbols (info->symtab, |
| 26023 | info->psyms_seen, |
| 26024 | &info->objfile->global_psymbols[psymtab->globals_offset], |
| 26025 | psymtab->n_global_syms, info->cu_index, |
| 26026 | 0); |
| 26027 | write_psymbols (info->symtab, |
| 26028 | info->psyms_seen, |
| 26029 | &info->objfile->static_psymbols[psymtab->statics_offset], |
| 26030 | psymtab->n_static_syms, info->cu_index, |
| 26031 | 1); |
| 26032 | |
| 26033 | info->types_list.append_uint (8, BFD_ENDIAN_LITTLE, |
| 26034 | to_underlying (entry->per_cu.sect_off)); |
| 26035 | info->types_list.append_uint (8, BFD_ENDIAN_LITTLE, |
| 26036 | to_underlying (entry->type_offset_in_tu)); |
| 26037 | info->types_list.append_uint (8, BFD_ENDIAN_LITTLE, entry->signature); |
| 26038 | |
| 26039 | ++info->cu_index; |
| 26040 | |
| 26041 | return 1; |
| 26042 | } |
| 26043 | |
| 26044 | /* Recurse into all "included" dependencies and count their symbols as |
| 26045 | if they appeared in this psymtab. */ |
| 26046 | |
| 26047 | static void |
| 26048 | recursively_count_psymbols (struct partial_symtab *psymtab, |
| 26049 | size_t &psyms_seen) |
| 26050 | { |
| 26051 | for (int i = 0; i < psymtab->number_of_dependencies; ++i) |
| 26052 | if (psymtab->dependencies[i]->user != NULL) |
| 26053 | recursively_count_psymbols (psymtab->dependencies[i], |
| 26054 | psyms_seen); |
| 26055 | |
| 26056 | psyms_seen += psymtab->n_global_syms; |
| 26057 | psyms_seen += psymtab->n_static_syms; |
| 26058 | } |
| 26059 | |
| 26060 | /* Recurse into all "included" dependencies and write their symbols as |
| 26061 | if they appeared in this psymtab. */ |
| 26062 | |
| 26063 | static void |
| 26064 | recursively_write_psymbols (struct objfile *objfile, |
| 26065 | struct partial_symtab *psymtab, |
| 26066 | struct mapped_symtab *symtab, |
| 26067 | std::unordered_set<partial_symbol *> &psyms_seen, |
| 26068 | offset_type cu_index) |
| 26069 | { |
| 26070 | int i; |
| 26071 | |
| 26072 | for (i = 0; i < psymtab->number_of_dependencies; ++i) |
| 26073 | if (psymtab->dependencies[i]->user != NULL) |
| 26074 | recursively_write_psymbols (objfile, psymtab->dependencies[i], |
| 26075 | symtab, psyms_seen, cu_index); |
| 26076 | |
| 26077 | write_psymbols (symtab, |
| 26078 | psyms_seen, |
| 26079 | &objfile->global_psymbols[psymtab->globals_offset], |
| 26080 | psymtab->n_global_syms, cu_index, |
| 26081 | 0); |
| 26082 | write_psymbols (symtab, |
| 26083 | psyms_seen, |
| 26084 | &objfile->static_psymbols[psymtab->statics_offset], |
| 26085 | psymtab->n_static_syms, cu_index, |
| 26086 | 1); |
| 26087 | } |
| 26088 | |
| 26089 | /* DWARF-5 .debug_names builder. */ |
| 26090 | class debug_names |
| 26091 | { |
| 26092 | public: |
| 26093 | debug_names (struct dwarf2_per_objfile *dwarf2_per_objfile, bool is_dwarf64, |
| 26094 | bfd_endian dwarf5_byte_order) |
| 26095 | : m_dwarf5_byte_order (dwarf5_byte_order), |
| 26096 | m_dwarf32 (dwarf5_byte_order), |
| 26097 | m_dwarf64 (dwarf5_byte_order), |
| 26098 | m_dwarf (is_dwarf64 |
| 26099 | ? static_cast<dwarf &> (m_dwarf64) |
| 26100 | : static_cast<dwarf &> (m_dwarf32)), |
| 26101 | m_name_table_string_offs (m_dwarf.name_table_string_offs), |
| 26102 | m_name_table_entry_offs (m_dwarf.name_table_entry_offs), |
| 26103 | m_debugstrlookup (dwarf2_per_objfile) |
| 26104 | {} |
| 26105 | |
| 26106 | int dwarf5_offset_size () const |
| 26107 | { |
| 26108 | const bool dwarf5_is_dwarf64 = &m_dwarf == &m_dwarf64; |
| 26109 | return dwarf5_is_dwarf64 ? 8 : 4; |
| 26110 | } |
| 26111 | |
| 26112 | /* Is this symbol from DW_TAG_compile_unit or DW_TAG_type_unit? */ |
| 26113 | enum class unit_kind { cu, tu }; |
| 26114 | |
| 26115 | /* Insert one symbol. */ |
| 26116 | void insert (const partial_symbol *psym, int cu_index, bool is_static, |
| 26117 | unit_kind kind) |
| 26118 | { |
| 26119 | const int dwarf_tag = psymbol_tag (psym); |
| 26120 | if (dwarf_tag == 0) |
| 26121 | return; |
| 26122 | const char *const name = SYMBOL_SEARCH_NAME (psym); |
| 26123 | const auto insertpair |
| 26124 | = m_name_to_value_set.emplace (c_str_view (name), |
| 26125 | std::set<symbol_value> ()); |
| 26126 | std::set<symbol_value> &value_set = insertpair.first->second; |
| 26127 | value_set.emplace (symbol_value (dwarf_tag, cu_index, is_static, kind)); |
| 26128 | } |
| 26129 | |
| 26130 | /* Build all the tables. All symbols must be already inserted. |
| 26131 | This function does not call file_write, caller has to do it |
| 26132 | afterwards. */ |
| 26133 | void build () |
| 26134 | { |
| 26135 | /* Verify the build method has not be called twice. */ |
| 26136 | gdb_assert (m_abbrev_table.empty ()); |
| 26137 | const size_t name_count = m_name_to_value_set.size (); |
| 26138 | m_bucket_table.resize |
| 26139 | (std::pow (2, std::ceil (std::log2 (name_count * 4 / 3)))); |
| 26140 | m_hash_table.reserve (name_count); |
| 26141 | m_name_table_string_offs.reserve (name_count); |
| 26142 | m_name_table_entry_offs.reserve (name_count); |
| 26143 | |
| 26144 | /* Map each hash of symbol to its name and value. */ |
| 26145 | struct hash_it_pair |
| 26146 | { |
| 26147 | uint32_t hash; |
| 26148 | decltype (m_name_to_value_set)::const_iterator it; |
| 26149 | }; |
| 26150 | std::vector<std::forward_list<hash_it_pair>> bucket_hash; |
| 26151 | bucket_hash.resize (m_bucket_table.size ()); |
| 26152 | for (decltype (m_name_to_value_set)::const_iterator it |
| 26153 | = m_name_to_value_set.cbegin (); |
| 26154 | it != m_name_to_value_set.cend (); |
| 26155 | ++it) |
| 26156 | { |
| 26157 | const char *const name = it->first.c_str (); |
| 26158 | const uint32_t hash = dwarf5_djb_hash (name); |
| 26159 | hash_it_pair hashitpair; |
| 26160 | hashitpair.hash = hash; |
| 26161 | hashitpair.it = it; |
| 26162 | auto &slot = bucket_hash[hash % bucket_hash.size()]; |
| 26163 | slot.push_front (std::move (hashitpair)); |
| 26164 | } |
| 26165 | for (size_t bucket_ix = 0; bucket_ix < bucket_hash.size (); ++bucket_ix) |
| 26166 | { |
| 26167 | const std::forward_list<hash_it_pair> &hashitlist |
| 26168 | = bucket_hash[bucket_ix]; |
| 26169 | if (hashitlist.empty ()) |
| 26170 | continue; |
| 26171 | uint32_t &bucket_slot = m_bucket_table[bucket_ix]; |
| 26172 | /* The hashes array is indexed starting at 1. */ |
| 26173 | store_unsigned_integer (reinterpret_cast<gdb_byte *> (&bucket_slot), |
| 26174 | sizeof (bucket_slot), m_dwarf5_byte_order, |
| 26175 | m_hash_table.size () + 1); |
| 26176 | for (const hash_it_pair &hashitpair : hashitlist) |
| 26177 | { |
| 26178 | m_hash_table.push_back (0); |
| 26179 | store_unsigned_integer (reinterpret_cast<gdb_byte *> |
| 26180 | (&m_hash_table.back ()), |
| 26181 | sizeof (m_hash_table.back ()), |
| 26182 | m_dwarf5_byte_order, hashitpair.hash); |
| 26183 | const c_str_view &name = hashitpair.it->first; |
| 26184 | const std::set<symbol_value> &value_set = hashitpair.it->second; |
| 26185 | m_name_table_string_offs.push_back_reorder |
| 26186 | (m_debugstrlookup.lookup (name.c_str ())); |
| 26187 | m_name_table_entry_offs.push_back_reorder (m_entry_pool.size ()); |
| 26188 | gdb_assert (!value_set.empty ()); |
| 26189 | for (const symbol_value &value : value_set) |
| 26190 | { |
| 26191 | int &idx = m_indexkey_to_idx[index_key (value.dwarf_tag, |
| 26192 | value.is_static, |
| 26193 | value.kind)]; |
| 26194 | if (idx == 0) |
| 26195 | { |
| 26196 | idx = m_idx_next++; |
| 26197 | m_abbrev_table.append_unsigned_leb128 (idx); |
| 26198 | m_abbrev_table.append_unsigned_leb128 (value.dwarf_tag); |
| 26199 | m_abbrev_table.append_unsigned_leb128 |
| 26200 | (value.kind == unit_kind::cu ? DW_IDX_compile_unit |
| 26201 | : DW_IDX_type_unit); |
| 26202 | m_abbrev_table.append_unsigned_leb128 (DW_FORM_udata); |
| 26203 | m_abbrev_table.append_unsigned_leb128 (value.is_static |
| 26204 | ? DW_IDX_GNU_internal |
| 26205 | : DW_IDX_GNU_external); |
| 26206 | m_abbrev_table.append_unsigned_leb128 (DW_FORM_flag_present); |
| 26207 | |
| 26208 | /* Terminate attributes list. */ |
| 26209 | m_abbrev_table.append_unsigned_leb128 (0); |
| 26210 | m_abbrev_table.append_unsigned_leb128 (0); |
| 26211 | } |
| 26212 | |
| 26213 | m_entry_pool.append_unsigned_leb128 (idx); |
| 26214 | m_entry_pool.append_unsigned_leb128 (value.cu_index); |
| 26215 | } |
| 26216 | |
| 26217 | /* Terminate the list of CUs. */ |
| 26218 | m_entry_pool.append_unsigned_leb128 (0); |
| 26219 | } |
| 26220 | } |
| 26221 | gdb_assert (m_hash_table.size () == name_count); |
| 26222 | |
| 26223 | /* Terminate tags list. */ |
| 26224 | m_abbrev_table.append_unsigned_leb128 (0); |
| 26225 | } |
| 26226 | |
| 26227 | /* Return .debug_names bucket count. This must be called only after |
| 26228 | calling the build method. */ |
| 26229 | uint32_t bucket_count () const |
| 26230 | { |
| 26231 | /* Verify the build method has been already called. */ |
| 26232 | gdb_assert (!m_abbrev_table.empty ()); |
| 26233 | const uint32_t retval = m_bucket_table.size (); |
| 26234 | |
| 26235 | /* Check for overflow. */ |
| 26236 | gdb_assert (retval == m_bucket_table.size ()); |
| 26237 | return retval; |
| 26238 | } |
| 26239 | |
| 26240 | /* Return .debug_names names count. This must be called only after |
| 26241 | calling the build method. */ |
| 26242 | uint32_t name_count () const |
| 26243 | { |
| 26244 | /* Verify the build method has been already called. */ |
| 26245 | gdb_assert (!m_abbrev_table.empty ()); |
| 26246 | const uint32_t retval = m_hash_table.size (); |
| 26247 | |
| 26248 | /* Check for overflow. */ |
| 26249 | gdb_assert (retval == m_hash_table.size ()); |
| 26250 | return retval; |
| 26251 | } |
| 26252 | |
| 26253 | /* Return number of bytes of .debug_names abbreviation table. This |
| 26254 | must be called only after calling the build method. */ |
| 26255 | uint32_t abbrev_table_bytes () const |
| 26256 | { |
| 26257 | gdb_assert (!m_abbrev_table.empty ()); |
| 26258 | return m_abbrev_table.size (); |
| 26259 | } |
| 26260 | |
| 26261 | /* Recurse into all "included" dependencies and store their symbols |
| 26262 | as if they appeared in this psymtab. */ |
| 26263 | void recursively_write_psymbols |
| 26264 | (struct objfile *objfile, |
| 26265 | struct partial_symtab *psymtab, |
| 26266 | std::unordered_set<partial_symbol *> &psyms_seen, |
| 26267 | int cu_index) |
| 26268 | { |
| 26269 | for (int i = 0; i < psymtab->number_of_dependencies; ++i) |
| 26270 | if (psymtab->dependencies[i]->user != NULL) |
| 26271 | recursively_write_psymbols (objfile, psymtab->dependencies[i], |
| 26272 | psyms_seen, cu_index); |
| 26273 | |
| 26274 | write_psymbols (psyms_seen, |
| 26275 | &objfile->global_psymbols[psymtab->globals_offset], |
| 26276 | psymtab->n_global_syms, cu_index, false, unit_kind::cu); |
| 26277 | write_psymbols (psyms_seen, |
| 26278 | &objfile->static_psymbols[psymtab->statics_offset], |
| 26279 | psymtab->n_static_syms, cu_index, true, unit_kind::cu); |
| 26280 | } |
| 26281 | |
| 26282 | /* Return number of bytes the .debug_names section will have. This |
| 26283 | must be called only after calling the build method. */ |
| 26284 | size_t bytes () const |
| 26285 | { |
| 26286 | /* Verify the build method has been already called. */ |
| 26287 | gdb_assert (!m_abbrev_table.empty ()); |
| 26288 | size_t expected_bytes = 0; |
| 26289 | expected_bytes += m_bucket_table.size () * sizeof (m_bucket_table[0]); |
| 26290 | expected_bytes += m_hash_table.size () * sizeof (m_hash_table[0]); |
| 26291 | expected_bytes += m_name_table_string_offs.bytes (); |
| 26292 | expected_bytes += m_name_table_entry_offs.bytes (); |
| 26293 | expected_bytes += m_abbrev_table.size (); |
| 26294 | expected_bytes += m_entry_pool.size (); |
| 26295 | return expected_bytes; |
| 26296 | } |
| 26297 | |
| 26298 | /* Write .debug_names to FILE_NAMES and .debug_str addition to |
| 26299 | FILE_STR. This must be called only after calling the build |
| 26300 | method. */ |
| 26301 | void file_write (FILE *file_names, FILE *file_str) const |
| 26302 | { |
| 26303 | /* Verify the build method has been already called. */ |
| 26304 | gdb_assert (!m_abbrev_table.empty ()); |
| 26305 | ::file_write (file_names, m_bucket_table); |
| 26306 | ::file_write (file_names, m_hash_table); |
| 26307 | m_name_table_string_offs.file_write (file_names); |
| 26308 | m_name_table_entry_offs.file_write (file_names); |
| 26309 | m_abbrev_table.file_write (file_names); |
| 26310 | m_entry_pool.file_write (file_names); |
| 26311 | m_debugstrlookup.file_write (file_str); |
| 26312 | } |
| 26313 | |
| 26314 | /* A helper user data for write_one_signatured_type. */ |
| 26315 | class write_one_signatured_type_data |
| 26316 | { |
| 26317 | public: |
| 26318 | write_one_signatured_type_data (debug_names &nametable_, |
| 26319 | signatured_type_index_data &&info_) |
| 26320 | : nametable (nametable_), info (std::move (info_)) |
| 26321 | {} |
| 26322 | debug_names &nametable; |
| 26323 | struct signatured_type_index_data info; |
| 26324 | }; |
| 26325 | |
| 26326 | /* A helper function to pass write_one_signatured_type to |
| 26327 | htab_traverse_noresize. */ |
| 26328 | static int |
| 26329 | write_one_signatured_type (void **slot, void *d) |
| 26330 | { |
| 26331 | write_one_signatured_type_data *data = (write_one_signatured_type_data *) d; |
| 26332 | struct signatured_type_index_data *info = &data->info; |
| 26333 | struct signatured_type *entry = (struct signatured_type *) *slot; |
| 26334 | |
| 26335 | data->nametable.write_one_signatured_type (entry, info); |
| 26336 | |
| 26337 | return 1; |
| 26338 | } |
| 26339 | |
| 26340 | private: |
| 26341 | |
| 26342 | /* Storage for symbol names mapping them to their .debug_str section |
| 26343 | offsets. */ |
| 26344 | class debug_str_lookup |
| 26345 | { |
| 26346 | public: |
| 26347 | |
| 26348 | /* Object costructor to be called for current DWARF2_PER_OBJFILE. |
| 26349 | All .debug_str section strings are automatically stored. */ |
| 26350 | debug_str_lookup (struct dwarf2_per_objfile *dwarf2_per_objfile) |
| 26351 | : m_abfd (dwarf2_per_objfile->objfile->obfd), |
| 26352 | m_dwarf2_per_objfile (dwarf2_per_objfile) |
| 26353 | { |
| 26354 | dwarf2_read_section (dwarf2_per_objfile->objfile, |
| 26355 | &dwarf2_per_objfile->str); |
| 26356 | if (dwarf2_per_objfile->str.buffer == NULL) |
| 26357 | return; |
| 26358 | for (const gdb_byte *data = dwarf2_per_objfile->str.buffer; |
| 26359 | data < (dwarf2_per_objfile->str.buffer |
| 26360 | + dwarf2_per_objfile->str.size);) |
| 26361 | { |
| 26362 | const char *const s = reinterpret_cast<const char *> (data); |
| 26363 | const auto insertpair |
| 26364 | = m_str_table.emplace (c_str_view (s), |
| 26365 | data - dwarf2_per_objfile->str.buffer); |
| 26366 | if (!insertpair.second) |
| 26367 | complaint (&symfile_complaints, |
| 26368 | _("Duplicate string \"%s\" in " |
| 26369 | ".debug_str section [in module %s]"), |
| 26370 | s, bfd_get_filename (m_abfd)); |
| 26371 | data += strlen (s) + 1; |
| 26372 | } |
| 26373 | } |
| 26374 | |
| 26375 | /* Return offset of symbol name S in the .debug_str section. Add |
| 26376 | such symbol to the section's end if it does not exist there |
| 26377 | yet. */ |
| 26378 | size_t lookup (const char *s) |
| 26379 | { |
| 26380 | const auto it = m_str_table.find (c_str_view (s)); |
| 26381 | if (it != m_str_table.end ()) |
| 26382 | return it->second; |
| 26383 | const size_t offset = (m_dwarf2_per_objfile->str.size |
| 26384 | + m_str_add_buf.size ()); |
| 26385 | m_str_table.emplace (c_str_view (s), offset); |
| 26386 | m_str_add_buf.append_cstr0 (s); |
| 26387 | return offset; |
| 26388 | } |
| 26389 | |
| 26390 | /* Append the end of the .debug_str section to FILE. */ |
| 26391 | void file_write (FILE *file) const |
| 26392 | { |
| 26393 | m_str_add_buf.file_write (file); |
| 26394 | } |
| 26395 | |
| 26396 | private: |
| 26397 | std::unordered_map<c_str_view, size_t, c_str_view_hasher> m_str_table; |
| 26398 | bfd *const m_abfd; |
| 26399 | struct dwarf2_per_objfile *m_dwarf2_per_objfile; |
| 26400 | |
| 26401 | /* Data to add at the end of .debug_str for new needed symbol names. */ |
| 26402 | data_buf m_str_add_buf; |
| 26403 | }; |
| 26404 | |
| 26405 | /* Container to map used DWARF tags to their .debug_names abbreviation |
| 26406 | tags. */ |
| 26407 | class index_key |
| 26408 | { |
| 26409 | public: |
| 26410 | index_key (int dwarf_tag_, bool is_static_, unit_kind kind_) |
| 26411 | : dwarf_tag (dwarf_tag_), is_static (is_static_), kind (kind_) |
| 26412 | { |
| 26413 | } |
| 26414 | |
| 26415 | bool |
| 26416 | operator== (const index_key &other) const |
| 26417 | { |
| 26418 | return (dwarf_tag == other.dwarf_tag && is_static == other.is_static |
| 26419 | && kind == other.kind); |
| 26420 | } |
| 26421 | |
| 26422 | const int dwarf_tag; |
| 26423 | const bool is_static; |
| 26424 | const unit_kind kind; |
| 26425 | }; |
| 26426 | |
| 26427 | /* Provide std::unordered_map::hasher for index_key. */ |
| 26428 | class index_key_hasher |
| 26429 | { |
| 26430 | public: |
| 26431 | size_t |
| 26432 | operator () (const index_key &key) const |
| 26433 | { |
| 26434 | return (std::hash<int>() (key.dwarf_tag) << 1) | key.is_static; |
| 26435 | } |
| 26436 | }; |
| 26437 | |
| 26438 | /* Parameters of one symbol entry. */ |
| 26439 | class symbol_value |
| 26440 | { |
| 26441 | public: |
| 26442 | const int dwarf_tag, cu_index; |
| 26443 | const bool is_static; |
| 26444 | const unit_kind kind; |
| 26445 | |
| 26446 | symbol_value (int dwarf_tag_, int cu_index_, bool is_static_, |
| 26447 | unit_kind kind_) |
| 26448 | : dwarf_tag (dwarf_tag_), cu_index (cu_index_), is_static (is_static_), |
| 26449 | kind (kind_) |
| 26450 | {} |
| 26451 | |
| 26452 | bool |
| 26453 | operator< (const symbol_value &other) const |
| 26454 | { |
| 26455 | #define X(n) \ |
| 26456 | do \ |
| 26457 | { \ |
| 26458 | if (n < other.n) \ |
| 26459 | return true; \ |
| 26460 | if (n > other.n) \ |
| 26461 | return false; \ |
| 26462 | } \ |
| 26463 | while (0) |
| 26464 | X (dwarf_tag); |
| 26465 | X (is_static); |
| 26466 | X (kind); |
| 26467 | X (cu_index); |
| 26468 | #undef X |
| 26469 | return false; |
| 26470 | } |
| 26471 | }; |
| 26472 | |
| 26473 | /* Abstract base class to unify DWARF-32 and DWARF-64 name table |
| 26474 | output. */ |
| 26475 | class offset_vec |
| 26476 | { |
| 26477 | protected: |
| 26478 | const bfd_endian dwarf5_byte_order; |
| 26479 | public: |
| 26480 | explicit offset_vec (bfd_endian dwarf5_byte_order_) |
| 26481 | : dwarf5_byte_order (dwarf5_byte_order_) |
| 26482 | {} |
| 26483 | |
| 26484 | /* Call std::vector::reserve for NELEM elements. */ |
| 26485 | virtual void reserve (size_t nelem) = 0; |
| 26486 | |
| 26487 | /* Call std::vector::push_back with store_unsigned_integer byte |
| 26488 | reordering for ELEM. */ |
| 26489 | virtual void push_back_reorder (size_t elem) = 0; |
| 26490 | |
| 26491 | /* Return expected output size in bytes. */ |
| 26492 | virtual size_t bytes () const = 0; |
| 26493 | |
| 26494 | /* Write name table to FILE. */ |
| 26495 | virtual void file_write (FILE *file) const = 0; |
| 26496 | }; |
| 26497 | |
| 26498 | /* Template to unify DWARF-32 and DWARF-64 output. */ |
| 26499 | template<typename OffsetSize> |
| 26500 | class offset_vec_tmpl : public offset_vec |
| 26501 | { |
| 26502 | public: |
| 26503 | explicit offset_vec_tmpl (bfd_endian dwarf5_byte_order_) |
| 26504 | : offset_vec (dwarf5_byte_order_) |
| 26505 | {} |
| 26506 | |
| 26507 | /* Implement offset_vec::reserve. */ |
| 26508 | void reserve (size_t nelem) override |
| 26509 | { |
| 26510 | m_vec.reserve (nelem); |
| 26511 | } |
| 26512 | |
| 26513 | /* Implement offset_vec::push_back_reorder. */ |
| 26514 | void push_back_reorder (size_t elem) override |
| 26515 | { |
| 26516 | m_vec.push_back (elem); |
| 26517 | /* Check for overflow. */ |
| 26518 | gdb_assert (m_vec.back () == elem); |
| 26519 | store_unsigned_integer (reinterpret_cast<gdb_byte *> (&m_vec.back ()), |
| 26520 | sizeof (m_vec.back ()), dwarf5_byte_order, elem); |
| 26521 | } |
| 26522 | |
| 26523 | /* Implement offset_vec::bytes. */ |
| 26524 | size_t bytes () const override |
| 26525 | { |
| 26526 | return m_vec.size () * sizeof (m_vec[0]); |
| 26527 | } |
| 26528 | |
| 26529 | /* Implement offset_vec::file_write. */ |
| 26530 | void file_write (FILE *file) const override |
| 26531 | { |
| 26532 | ::file_write (file, m_vec); |
| 26533 | } |
| 26534 | |
| 26535 | private: |
| 26536 | std::vector<OffsetSize> m_vec; |
| 26537 | }; |
| 26538 | |
| 26539 | /* Base class to unify DWARF-32 and DWARF-64 .debug_names output |
| 26540 | respecting name table width. */ |
| 26541 | class dwarf |
| 26542 | { |
| 26543 | public: |
| 26544 | offset_vec &name_table_string_offs, &name_table_entry_offs; |
| 26545 | |
| 26546 | dwarf (offset_vec &name_table_string_offs_, |
| 26547 | offset_vec &name_table_entry_offs_) |
| 26548 | : name_table_string_offs (name_table_string_offs_), |
| 26549 | name_table_entry_offs (name_table_entry_offs_) |
| 26550 | { |
| 26551 | } |
| 26552 | }; |
| 26553 | |
| 26554 | /* Template to unify DWARF-32 and DWARF-64 .debug_names output |
| 26555 | respecting name table width. */ |
| 26556 | template<typename OffsetSize> |
| 26557 | class dwarf_tmpl : public dwarf |
| 26558 | { |
| 26559 | public: |
| 26560 | explicit dwarf_tmpl (bfd_endian dwarf5_byte_order_) |
| 26561 | : dwarf (m_name_table_string_offs, m_name_table_entry_offs), |
| 26562 | m_name_table_string_offs (dwarf5_byte_order_), |
| 26563 | m_name_table_entry_offs (dwarf5_byte_order_) |
| 26564 | {} |
| 26565 | |
| 26566 | private: |
| 26567 | offset_vec_tmpl<OffsetSize> m_name_table_string_offs; |
| 26568 | offset_vec_tmpl<OffsetSize> m_name_table_entry_offs; |
| 26569 | }; |
| 26570 | |
| 26571 | /* Try to reconstruct original DWARF tag for given partial_symbol. |
| 26572 | This function is not DWARF-5 compliant but it is sufficient for |
| 26573 | GDB as a DWARF-5 index consumer. */ |
| 26574 | static int psymbol_tag (const struct partial_symbol *psym) |
| 26575 | { |
| 26576 | domain_enum domain = PSYMBOL_DOMAIN (psym); |
| 26577 | enum address_class aclass = PSYMBOL_CLASS (psym); |
| 26578 | |
| 26579 | switch (domain) |
| 26580 | { |
| 26581 | case VAR_DOMAIN: |
| 26582 | switch (aclass) |
| 26583 | { |
| 26584 | case LOC_BLOCK: |
| 26585 | return DW_TAG_subprogram; |
| 26586 | case LOC_TYPEDEF: |
| 26587 | return DW_TAG_typedef; |
| 26588 | case LOC_COMPUTED: |
| 26589 | case LOC_CONST_BYTES: |
| 26590 | case LOC_OPTIMIZED_OUT: |
| 26591 | case LOC_STATIC: |
| 26592 | return DW_TAG_variable; |
| 26593 | case LOC_CONST: |
| 26594 | /* Note: It's currently impossible to recognize psyms as enum values |
| 26595 | short of reading the type info. For now punt. */ |
| 26596 | return DW_TAG_variable; |
| 26597 | default: |
| 26598 | /* There are other LOC_FOO values that one might want to classify |
| 26599 | as variables, but dwarf2read.c doesn't currently use them. */ |
| 26600 | return DW_TAG_variable; |
| 26601 | } |
| 26602 | case STRUCT_DOMAIN: |
| 26603 | return DW_TAG_structure_type; |
| 26604 | default: |
| 26605 | return 0; |
| 26606 | } |
| 26607 | } |
| 26608 | |
| 26609 | /* Call insert for all partial symbols and mark them in PSYMS_SEEN. */ |
| 26610 | void write_psymbols (std::unordered_set<partial_symbol *> &psyms_seen, |
| 26611 | struct partial_symbol **psymp, int count, int cu_index, |
| 26612 | bool is_static, unit_kind kind) |
| 26613 | { |
| 26614 | for (; count-- > 0; ++psymp) |
| 26615 | { |
| 26616 | struct partial_symbol *psym = *psymp; |
| 26617 | |
| 26618 | if (SYMBOL_LANGUAGE (psym) == language_ada) |
| 26619 | error (_("Ada is not currently supported by the index")); |
| 26620 | |
| 26621 | /* Only add a given psymbol once. */ |
| 26622 | if (psyms_seen.insert (psym).second) |
| 26623 | insert (psym, cu_index, is_static, kind); |
| 26624 | } |
| 26625 | } |
| 26626 | |
| 26627 | /* A helper function that writes a single signatured_type |
| 26628 | to a debug_names. */ |
| 26629 | void |
| 26630 | write_one_signatured_type (struct signatured_type *entry, |
| 26631 | struct signatured_type_index_data *info) |
| 26632 | { |
| 26633 | struct partial_symtab *psymtab = entry->per_cu.v.psymtab; |
| 26634 | |
| 26635 | write_psymbols (info->psyms_seen, |
| 26636 | &info->objfile->global_psymbols[psymtab->globals_offset], |
| 26637 | psymtab->n_global_syms, info->cu_index, false, |
| 26638 | unit_kind::tu); |
| 26639 | write_psymbols (info->psyms_seen, |
| 26640 | &info->objfile->static_psymbols[psymtab->statics_offset], |
| 26641 | psymtab->n_static_syms, info->cu_index, true, |
| 26642 | unit_kind::tu); |
| 26643 | |
| 26644 | info->types_list.append_uint (dwarf5_offset_size (), m_dwarf5_byte_order, |
| 26645 | to_underlying (entry->per_cu.sect_off)); |
| 26646 | |
| 26647 | ++info->cu_index; |
| 26648 | } |
| 26649 | |
| 26650 | /* Store value of each symbol. */ |
| 26651 | std::unordered_map<c_str_view, std::set<symbol_value>, c_str_view_hasher> |
| 26652 | m_name_to_value_set; |
| 26653 | |
| 26654 | /* Tables of DWARF-5 .debug_names. They are in object file byte |
| 26655 | order. */ |
| 26656 | std::vector<uint32_t> m_bucket_table; |
| 26657 | std::vector<uint32_t> m_hash_table; |
| 26658 | |
| 26659 | const bfd_endian m_dwarf5_byte_order; |
| 26660 | dwarf_tmpl<uint32_t> m_dwarf32; |
| 26661 | dwarf_tmpl<uint64_t> m_dwarf64; |
| 26662 | dwarf &m_dwarf; |
| 26663 | offset_vec &m_name_table_string_offs, &m_name_table_entry_offs; |
| 26664 | debug_str_lookup m_debugstrlookup; |
| 26665 | |
| 26666 | /* Map each used .debug_names abbreviation tag parameter to its |
| 26667 | index value. */ |
| 26668 | std::unordered_map<index_key, int, index_key_hasher> m_indexkey_to_idx; |
| 26669 | |
| 26670 | /* Next unused .debug_names abbreviation tag for |
| 26671 | m_indexkey_to_idx. */ |
| 26672 | int m_idx_next = 1; |
| 26673 | |
| 26674 | /* .debug_names abbreviation table. */ |
| 26675 | data_buf m_abbrev_table; |
| 26676 | |
| 26677 | /* .debug_names entry pool. */ |
| 26678 | data_buf m_entry_pool; |
| 26679 | }; |
| 26680 | |
| 26681 | /* Return iff any of the needed offsets does not fit into 32-bit |
| 26682 | .debug_names section. */ |
| 26683 | |
| 26684 | static bool |
| 26685 | check_dwarf64_offsets (struct dwarf2_per_objfile *dwarf2_per_objfile) |
| 26686 | { |
| 26687 | for (int i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
| 26688 | { |
| 26689 | const dwarf2_per_cu_data &per_cu = *dwarf2_per_objfile->all_comp_units[i]; |
| 26690 | |
| 26691 | if (to_underlying (per_cu.sect_off) >= (static_cast<uint64_t> (1) << 32)) |
| 26692 | return true; |
| 26693 | } |
| 26694 | for (int i = 0; i < dwarf2_per_objfile->n_type_units; ++i) |
| 26695 | { |
| 26696 | const signatured_type &sigtype = *dwarf2_per_objfile->all_type_units[i]; |
| 26697 | const dwarf2_per_cu_data &per_cu = sigtype.per_cu; |
| 26698 | |
| 26699 | if (to_underlying (per_cu.sect_off) >= (static_cast<uint64_t> (1) << 32)) |
| 26700 | return true; |
| 26701 | } |
| 26702 | return false; |
| 26703 | } |
| 26704 | |
| 26705 | /* The psyms_seen set is potentially going to be largish (~40k |
| 26706 | elements when indexing a -g3 build of GDB itself). Estimate the |
| 26707 | number of elements in order to avoid too many rehashes, which |
| 26708 | require rebuilding buckets and thus many trips to |
| 26709 | malloc/free. */ |
| 26710 | |
| 26711 | static size_t |
| 26712 | psyms_seen_size (struct dwarf2_per_objfile *dwarf2_per_objfile) |
| 26713 | { |
| 26714 | size_t psyms_count = 0; |
| 26715 | for (int i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
| 26716 | { |
| 26717 | struct dwarf2_per_cu_data *per_cu |
| 26718 | = dwarf2_per_objfile->all_comp_units[i]; |
| 26719 | struct partial_symtab *psymtab = per_cu->v.psymtab; |
| 26720 | |
| 26721 | if (psymtab != NULL && psymtab->user == NULL) |
| 26722 | recursively_count_psymbols (psymtab, psyms_count); |
| 26723 | } |
| 26724 | /* Generating an index for gdb itself shows a ratio of |
| 26725 | TOTAL_SEEN_SYMS/UNIQUE_SYMS or ~5. 4 seems like a good bet. */ |
| 26726 | return psyms_count / 4; |
| 26727 | } |
| 26728 | |
| 26729 | /* Write new .gdb_index section for OBJFILE into OUT_FILE. |
| 26730 | Return how many bytes were expected to be written into OUT_FILE. */ |
| 26731 | |
| 26732 | static size_t |
| 26733 | write_gdbindex (struct dwarf2_per_objfile *dwarf2_per_objfile, FILE *out_file) |
| 26734 | { |
| 26735 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 26736 | mapped_symtab symtab; |
| 26737 | data_buf cu_list; |
| 26738 | |
| 26739 | /* While we're scanning CU's create a table that maps a psymtab pointer |
| 26740 | (which is what addrmap records) to its index (which is what is recorded |
| 26741 | in the index file). This will later be needed to write the address |
| 26742 | table. */ |
| 26743 | psym_index_map cu_index_htab; |
| 26744 | cu_index_htab.reserve (dwarf2_per_objfile->n_comp_units); |
| 26745 | |
| 26746 | /* The CU list is already sorted, so we don't need to do additional |
| 26747 | work here. Also, the debug_types entries do not appear in |
| 26748 | all_comp_units, but only in their own hash table. */ |
| 26749 | |
| 26750 | std::unordered_set<partial_symbol *> psyms_seen |
| 26751 | (psyms_seen_size (dwarf2_per_objfile)); |
| 26752 | for (int i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
| 26753 | { |
| 26754 | struct dwarf2_per_cu_data *per_cu |
| 26755 | = dwarf2_per_objfile->all_comp_units[i]; |
| 26756 | struct partial_symtab *psymtab = per_cu->v.psymtab; |
| 26757 | |
| 26758 | /* CU of a shared file from 'dwz -m' may be unused by this main file. |
| 26759 | It may be referenced from a local scope but in such case it does not |
| 26760 | need to be present in .gdb_index. */ |
| 26761 | if (psymtab == NULL) |
| 26762 | continue; |
| 26763 | |
| 26764 | if (psymtab->user == NULL) |
| 26765 | recursively_write_psymbols (objfile, psymtab, &symtab, |
| 26766 | psyms_seen, i); |
| 26767 | |
| 26768 | const auto insertpair = cu_index_htab.emplace (psymtab, i); |
| 26769 | gdb_assert (insertpair.second); |
| 26770 | |
| 26771 | cu_list.append_uint (8, BFD_ENDIAN_LITTLE, |
| 26772 | to_underlying (per_cu->sect_off)); |
| 26773 | cu_list.append_uint (8, BFD_ENDIAN_LITTLE, per_cu->length); |
| 26774 | } |
| 26775 | |
| 26776 | /* Dump the address map. */ |
| 26777 | data_buf addr_vec; |
| 26778 | write_address_map (objfile, addr_vec, cu_index_htab); |
| 26779 | |
| 26780 | /* Write out the .debug_type entries, if any. */ |
| 26781 | data_buf types_cu_list; |
| 26782 | if (dwarf2_per_objfile->signatured_types) |
| 26783 | { |
| 26784 | signatured_type_index_data sig_data (types_cu_list, |
| 26785 | psyms_seen); |
| 26786 | |
| 26787 | sig_data.objfile = objfile; |
| 26788 | sig_data.symtab = &symtab; |
| 26789 | sig_data.cu_index = dwarf2_per_objfile->n_comp_units; |
| 26790 | htab_traverse_noresize (dwarf2_per_objfile->signatured_types, |
| 26791 | write_one_signatured_type, &sig_data); |
| 26792 | } |
| 26793 | |
| 26794 | /* Now that we've processed all symbols we can shrink their cu_indices |
| 26795 | lists. */ |
| 26796 | uniquify_cu_indices (&symtab); |
| 26797 | |
| 26798 | data_buf symtab_vec, constant_pool; |
| 26799 | write_hash_table (&symtab, symtab_vec, constant_pool); |
| 26800 | |
| 26801 | data_buf contents; |
| 26802 | const offset_type size_of_contents = 6 * sizeof (offset_type); |
| 26803 | offset_type total_len = size_of_contents; |
| 26804 | |
| 26805 | /* The version number. */ |
| 26806 | contents.append_data (MAYBE_SWAP (8)); |
| 26807 | |
| 26808 | /* The offset of the CU list from the start of the file. */ |
| 26809 | contents.append_data (MAYBE_SWAP (total_len)); |
| 26810 | total_len += cu_list.size (); |
| 26811 | |
| 26812 | /* The offset of the types CU list from the start of the file. */ |
| 26813 | contents.append_data (MAYBE_SWAP (total_len)); |
| 26814 | total_len += types_cu_list.size (); |
| 26815 | |
| 26816 | /* The offset of the address table from the start of the file. */ |
| 26817 | contents.append_data (MAYBE_SWAP (total_len)); |
| 26818 | total_len += addr_vec.size (); |
| 26819 | |
| 26820 | /* The offset of the symbol table from the start of the file. */ |
| 26821 | contents.append_data (MAYBE_SWAP (total_len)); |
| 26822 | total_len += symtab_vec.size (); |
| 26823 | |
| 26824 | /* The offset of the constant pool from the start of the file. */ |
| 26825 | contents.append_data (MAYBE_SWAP (total_len)); |
| 26826 | total_len += constant_pool.size (); |
| 26827 | |
| 26828 | gdb_assert (contents.size () == size_of_contents); |
| 26829 | |
| 26830 | contents.file_write (out_file); |
| 26831 | cu_list.file_write (out_file); |
| 26832 | types_cu_list.file_write (out_file); |
| 26833 | addr_vec.file_write (out_file); |
| 26834 | symtab_vec.file_write (out_file); |
| 26835 | constant_pool.file_write (out_file); |
| 26836 | |
| 26837 | return total_len; |
| 26838 | } |
| 26839 | |
| 26840 | /* DWARF-5 augmentation string for GDB's DW_IDX_GNU_* extension. */ |
| 26841 | static const gdb_byte dwarf5_gdb_augmentation[] = { 'G', 'D', 'B', 0 }; |
| 26842 | |
| 26843 | /* Write a new .debug_names section for OBJFILE into OUT_FILE, write |
| 26844 | needed addition to .debug_str section to OUT_FILE_STR. Return how |
| 26845 | many bytes were expected to be written into OUT_FILE. */ |
| 26846 | |
| 26847 | static size_t |
| 26848 | write_debug_names (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 26849 | FILE *out_file, FILE *out_file_str) |
| 26850 | { |
| 26851 | const bool dwarf5_is_dwarf64 = check_dwarf64_offsets (dwarf2_per_objfile); |
| 26852 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 26853 | const enum bfd_endian dwarf5_byte_order |
| 26854 | = gdbarch_byte_order (get_objfile_arch (objfile)); |
| 26855 | |
| 26856 | /* The CU list is already sorted, so we don't need to do additional |
| 26857 | work here. Also, the debug_types entries do not appear in |
| 26858 | all_comp_units, but only in their own hash table. */ |
| 26859 | data_buf cu_list; |
| 26860 | debug_names nametable (dwarf2_per_objfile, dwarf5_is_dwarf64, |
| 26861 | dwarf5_byte_order); |
| 26862 | std::unordered_set<partial_symbol *> |
| 26863 | psyms_seen (psyms_seen_size (dwarf2_per_objfile)); |
| 26864 | for (int i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
| 26865 | { |
| 26866 | const dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->all_comp_units[i]; |
| 26867 | partial_symtab *psymtab = per_cu->v.psymtab; |
| 26868 | |
| 26869 | /* CU of a shared file from 'dwz -m' may be unused by this main |
| 26870 | file. It may be referenced from a local scope but in such |
| 26871 | case it does not need to be present in .debug_names. */ |
| 26872 | if (psymtab == NULL) |
| 26873 | continue; |
| 26874 | |
| 26875 | if (psymtab->user == NULL) |
| 26876 | nametable.recursively_write_psymbols (objfile, psymtab, psyms_seen, i); |
| 26877 | |
| 26878 | cu_list.append_uint (nametable.dwarf5_offset_size (), dwarf5_byte_order, |
| 26879 | to_underlying (per_cu->sect_off)); |
| 26880 | } |
| 26881 | |
| 26882 | /* Write out the .debug_type entries, if any. */ |
| 26883 | data_buf types_cu_list; |
| 26884 | if (dwarf2_per_objfile->signatured_types) |
| 26885 | { |
| 26886 | debug_names::write_one_signatured_type_data sig_data (nametable, |
| 26887 | signatured_type_index_data (types_cu_list, psyms_seen)); |
| 26888 | |
| 26889 | sig_data.info.objfile = objfile; |
| 26890 | /* It is used only for gdb_index. */ |
| 26891 | sig_data.info.symtab = nullptr; |
| 26892 | sig_data.info.cu_index = 0; |
| 26893 | htab_traverse_noresize (dwarf2_per_objfile->signatured_types, |
| 26894 | debug_names::write_one_signatured_type, |
| 26895 | &sig_data); |
| 26896 | } |
| 26897 | |
| 26898 | nametable.build (); |
| 26899 | |
| 26900 | /* No addr_vec - DWARF-5 uses .debug_aranges generated by GCC. */ |
| 26901 | |
| 26902 | const offset_type bytes_of_header |
| 26903 | = ((dwarf5_is_dwarf64 ? 12 : 4) |
| 26904 | + 2 + 2 + 7 * 4 |
| 26905 | + sizeof (dwarf5_gdb_augmentation)); |
| 26906 | size_t expected_bytes = 0; |
| 26907 | expected_bytes += bytes_of_header; |
| 26908 | expected_bytes += cu_list.size (); |
| 26909 | expected_bytes += types_cu_list.size (); |
| 26910 | expected_bytes += nametable.bytes (); |
| 26911 | data_buf header; |
| 26912 | |
| 26913 | if (!dwarf5_is_dwarf64) |
| 26914 | { |
| 26915 | const uint64_t size64 = expected_bytes - 4; |
| 26916 | gdb_assert (size64 < 0xfffffff0); |
| 26917 | header.append_uint (4, dwarf5_byte_order, size64); |
| 26918 | } |
| 26919 | else |
| 26920 | { |
| 26921 | header.append_uint (4, dwarf5_byte_order, 0xffffffff); |
| 26922 | header.append_uint (8, dwarf5_byte_order, expected_bytes - 12); |
| 26923 | } |
| 26924 | |
| 26925 | /* The version number. */ |
| 26926 | header.append_uint (2, dwarf5_byte_order, 5); |
| 26927 | |
| 26928 | /* Padding. */ |
| 26929 | header.append_uint (2, dwarf5_byte_order, 0); |
| 26930 | |
| 26931 | /* comp_unit_count - The number of CUs in the CU list. */ |
| 26932 | header.append_uint (4, dwarf5_byte_order, dwarf2_per_objfile->n_comp_units); |
| 26933 | |
| 26934 | /* local_type_unit_count - The number of TUs in the local TU |
| 26935 | list. */ |
| 26936 | header.append_uint (4, dwarf5_byte_order, dwarf2_per_objfile->n_type_units); |
| 26937 | |
| 26938 | /* foreign_type_unit_count - The number of TUs in the foreign TU |
| 26939 | list. */ |
| 26940 | header.append_uint (4, dwarf5_byte_order, 0); |
| 26941 | |
| 26942 | /* bucket_count - The number of hash buckets in the hash lookup |
| 26943 | table. */ |
| 26944 | header.append_uint (4, dwarf5_byte_order, nametable.bucket_count ()); |
| 26945 | |
| 26946 | /* name_count - The number of unique names in the index. */ |
| 26947 | header.append_uint (4, dwarf5_byte_order, nametable.name_count ()); |
| 26948 | |
| 26949 | /* abbrev_table_size - The size in bytes of the abbreviations |
| 26950 | table. */ |
| 26951 | header.append_uint (4, dwarf5_byte_order, nametable.abbrev_table_bytes ()); |
| 26952 | |
| 26953 | /* augmentation_string_size - The size in bytes of the augmentation |
| 26954 | string. This value is rounded up to a multiple of 4. */ |
| 26955 | static_assert (sizeof (dwarf5_gdb_augmentation) % 4 == 0, ""); |
| 26956 | header.append_uint (4, dwarf5_byte_order, sizeof (dwarf5_gdb_augmentation)); |
| 26957 | header.append_data (dwarf5_gdb_augmentation); |
| 26958 | |
| 26959 | gdb_assert (header.size () == bytes_of_header); |
| 26960 | |
| 26961 | header.file_write (out_file); |
| 26962 | cu_list.file_write (out_file); |
| 26963 | types_cu_list.file_write (out_file); |
| 26964 | nametable.file_write (out_file, out_file_str); |
| 26965 | |
| 26966 | return expected_bytes; |
| 26967 | } |
| 26968 | |
| 26969 | /* Assert that FILE's size is EXPECTED_SIZE. Assumes file's seek |
| 26970 | position is at the end of the file. */ |
| 26971 | |
| 26972 | static void |
| 26973 | assert_file_size (FILE *file, const char *filename, size_t expected_size) |
| 26974 | { |
| 26975 | const auto file_size = ftell (file); |
| 26976 | if (file_size == -1) |
| 26977 | error (_("Can't get `%s' size"), filename); |
| 26978 | gdb_assert (file_size == expected_size); |
| 26979 | } |
| 26980 | |
| 26981 | /* Create an index file for OBJFILE in the directory DIR. */ |
| 26982 | |
| 26983 | static void |
| 26984 | write_psymtabs_to_index (struct dwarf2_per_objfile *dwarf2_per_objfile, |
| 26985 | const char *dir, |
| 26986 | dw_index_kind index_kind) |
| 26987 | { |
| 26988 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
| 26989 | |
| 26990 | if (dwarf2_per_objfile->using_index) |
| 26991 | error (_("Cannot use an index to create the index")); |
| 26992 | |
| 26993 | if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) > 1) |
| 26994 | error (_("Cannot make an index when the file has multiple .debug_types sections")); |
| 26995 | |
| 26996 | if (!objfile->psymtabs || !objfile->psymtabs_addrmap) |
| 26997 | return; |
| 26998 | |
| 26999 | struct stat st; |
| 27000 | if (stat (objfile_name (objfile), &st) < 0) |
| 27001 | perror_with_name (objfile_name (objfile)); |
| 27002 | |
| 27003 | std::string filename (std::string (dir) + SLASH_STRING |
| 27004 | + lbasename (objfile_name (objfile)) |
| 27005 | + (index_kind == dw_index_kind::DEBUG_NAMES |
| 27006 | ? INDEX5_SUFFIX : INDEX4_SUFFIX)); |
| 27007 | |
| 27008 | FILE *out_file = gdb_fopen_cloexec (filename.c_str (), "wb").release (); |
| 27009 | if (!out_file) |
| 27010 | error (_("Can't open `%s' for writing"), filename.c_str ()); |
| 27011 | |
| 27012 | /* Order matters here; we want FILE to be closed before FILENAME is |
| 27013 | unlinked, because on MS-Windows one cannot delete a file that is |
| 27014 | still open. (Don't call anything here that might throw until |
| 27015 | file_closer is created.) */ |
| 27016 | gdb::unlinker unlink_file (filename.c_str ()); |
| 27017 | gdb_file_up close_out_file (out_file); |
| 27018 | |
| 27019 | if (index_kind == dw_index_kind::DEBUG_NAMES) |
| 27020 | { |
| 27021 | std::string filename_str (std::string (dir) + SLASH_STRING |
| 27022 | + lbasename (objfile_name (objfile)) |
| 27023 | + DEBUG_STR_SUFFIX); |
| 27024 | FILE *out_file_str |
| 27025 | = gdb_fopen_cloexec (filename_str.c_str (), "wb").release (); |
| 27026 | if (!out_file_str) |
| 27027 | error (_("Can't open `%s' for writing"), filename_str.c_str ()); |
| 27028 | gdb::unlinker unlink_file_str (filename_str.c_str ()); |
| 27029 | gdb_file_up close_out_file_str (out_file_str); |
| 27030 | |
| 27031 | const size_t total_len |
| 27032 | = write_debug_names (dwarf2_per_objfile, out_file, out_file_str); |
| 27033 | assert_file_size (out_file, filename.c_str (), total_len); |
| 27034 | |
| 27035 | /* We want to keep the file .debug_str file too. */ |
| 27036 | unlink_file_str.keep (); |
| 27037 | } |
| 27038 | else |
| 27039 | { |
| 27040 | const size_t total_len |
| 27041 | = write_gdbindex (dwarf2_per_objfile, out_file); |
| 27042 | assert_file_size (out_file, filename.c_str (), total_len); |
| 27043 | } |
| 27044 | |
| 27045 | /* We want to keep the file. */ |
| 27046 | unlink_file.keep (); |
| 27047 | } |
| 27048 | |
| 27049 | /* Implementation of the `save gdb-index' command. |
| 27050 | |
| 27051 | Note that the .gdb_index file format used by this command is |
| 27052 | documented in the GDB manual. Any changes here must be documented |
| 27053 | there. */ |
| 27054 | |
| 27055 | static void |
| 27056 | save_gdb_index_command (const char *arg, int from_tty) |
| 27057 | { |
| 27058 | struct objfile *objfile; |
| 27059 | const char dwarf5space[] = "-dwarf-5 "; |
| 27060 | dw_index_kind index_kind = dw_index_kind::GDB_INDEX; |
| 27061 | |
| 27062 | if (!arg) |
| 27063 | arg = ""; |
| 27064 | |
| 27065 | arg = skip_spaces (arg); |
| 27066 | if (strncmp (arg, dwarf5space, strlen (dwarf5space)) == 0) |
| 27067 | { |
| 27068 | index_kind = dw_index_kind::DEBUG_NAMES; |
| 27069 | arg += strlen (dwarf5space); |
| 27070 | arg = skip_spaces (arg); |
| 27071 | } |
| 27072 | |
| 27073 | if (!*arg) |
| 27074 | error (_("usage: save gdb-index [-dwarf-5] DIRECTORY")); |
| 27075 | |
| 27076 | ALL_OBJFILES (objfile) |
| 27077 | { |
| 27078 | struct stat st; |
| 27079 | |
| 27080 | /* If the objfile does not correspond to an actual file, skip it. */ |
| 27081 | if (stat (objfile_name (objfile), &st) < 0) |
| 27082 | continue; |
| 27083 | |
| 27084 | struct dwarf2_per_objfile *dwarf2_per_objfile |
| 27085 | = get_dwarf2_per_objfile (objfile); |
| 27086 | |
| 27087 | if (dwarf2_per_objfile != NULL) |
| 27088 | { |
| 27089 | TRY |
| 27090 | { |
| 27091 | write_psymtabs_to_index (dwarf2_per_objfile, arg, index_kind); |
| 27092 | } |
| 27093 | CATCH (except, RETURN_MASK_ERROR) |
| 27094 | { |
| 27095 | exception_fprintf (gdb_stderr, except, |
| 27096 | _("Error while writing index for `%s': "), |
| 27097 | objfile_name (objfile)); |
| 27098 | } |
| 27099 | END_CATCH |
| 27100 | } |
| 27101 | |
| 27102 | } |
| 27103 | } |
| 27104 | |
| 27105 | \f |
| 27106 | |
| 27107 | int dwarf_always_disassemble; |
| 27108 | |
| 27109 | static void |
| 27110 | show_dwarf_always_disassemble (struct ui_file *file, int from_tty, |
| 27111 | struct cmd_list_element *c, const char *value) |
| 27112 | { |
| 27113 | fprintf_filtered (file, |
| 27114 | _("Whether to always disassemble " |
| 27115 | "DWARF expressions is %s.\n"), |
| 27116 | value); |
| 27117 | } |
| 27118 | |
| 27119 | static void |
| 27120 | show_check_physname (struct ui_file *file, int from_tty, |
| 27121 | struct cmd_list_element *c, const char *value) |
| 27122 | { |
| 27123 | fprintf_filtered (file, |
| 27124 | _("Whether to check \"physname\" is %s.\n"), |
| 27125 | value); |
| 27126 | } |
| 27127 | |
| 27128 | void |
| 27129 | _initialize_dwarf2_read (void) |
| 27130 | { |
| 27131 | struct cmd_list_element *c; |
| 27132 | |
| 27133 | dwarf2_objfile_data_key = register_objfile_data (); |
| 27134 | |
| 27135 | add_prefix_cmd ("dwarf", class_maintenance, set_dwarf_cmd, _("\ |
| 27136 | Set DWARF specific variables.\n\ |
| 27137 | Configure DWARF variables such as the cache size"), |
| 27138 | &set_dwarf_cmdlist, "maintenance set dwarf ", |
| 27139 | 0/*allow-unknown*/, &maintenance_set_cmdlist); |
| 27140 | |
| 27141 | add_prefix_cmd ("dwarf", class_maintenance, show_dwarf_cmd, _("\ |
| 27142 | Show DWARF specific variables\n\ |
| 27143 | Show DWARF variables such as the cache size"), |
| 27144 | &show_dwarf_cmdlist, "maintenance show dwarf ", |
| 27145 | 0/*allow-unknown*/, &maintenance_show_cmdlist); |
| 27146 | |
| 27147 | add_setshow_zinteger_cmd ("max-cache-age", class_obscure, |
| 27148 | &dwarf_max_cache_age, _("\ |
| 27149 | Set the upper bound on the age of cached DWARF compilation units."), _("\ |
| 27150 | Show the upper bound on the age of cached DWARF compilation units."), _("\ |
| 27151 | A higher limit means that cached compilation units will be stored\n\ |
| 27152 | in memory longer, and more total memory will be used. Zero disables\n\ |
| 27153 | caching, which can slow down startup."), |
| 27154 | NULL, |
| 27155 | show_dwarf_max_cache_age, |
| 27156 | &set_dwarf_cmdlist, |
| 27157 | &show_dwarf_cmdlist); |
| 27158 | |
| 27159 | add_setshow_boolean_cmd ("always-disassemble", class_obscure, |
| 27160 | &dwarf_always_disassemble, _("\ |
| 27161 | Set whether `info address' always disassembles DWARF expressions."), _("\ |
| 27162 | Show whether `info address' always disassembles DWARF expressions."), _("\ |
| 27163 | When enabled, DWARF expressions are always printed in an assembly-like\n\ |
| 27164 | syntax. When disabled, expressions will be printed in a more\n\ |
| 27165 | conversational style, when possible."), |
| 27166 | NULL, |
| 27167 | show_dwarf_always_disassemble, |
| 27168 | &set_dwarf_cmdlist, |
| 27169 | &show_dwarf_cmdlist); |
| 27170 | |
| 27171 | add_setshow_zuinteger_cmd ("dwarf-read", no_class, &dwarf_read_debug, _("\ |
| 27172 | Set debugging of the DWARF reader."), _("\ |
| 27173 | Show debugging of the DWARF reader."), _("\ |
| 27174 | When enabled (non-zero), debugging messages are printed during DWARF\n\ |
| 27175 | reading and symtab expansion. A value of 1 (one) provides basic\n\ |
| 27176 | information. A value greater than 1 provides more verbose information."), |
| 27177 | NULL, |
| 27178 | NULL, |
| 27179 | &setdebuglist, &showdebuglist); |
| 27180 | |
| 27181 | add_setshow_zuinteger_cmd ("dwarf-die", no_class, &dwarf_die_debug, _("\ |
| 27182 | Set debugging of the DWARF DIE reader."), _("\ |
| 27183 | Show debugging of the DWARF DIE reader."), _("\ |
| 27184 | When enabled (non-zero), DIEs are dumped after they are read in.\n\ |
| 27185 | The value is the maximum depth to print."), |
| 27186 | NULL, |
| 27187 | NULL, |
| 27188 | &setdebuglist, &showdebuglist); |
| 27189 | |
| 27190 | add_setshow_zuinteger_cmd ("dwarf-line", no_class, &dwarf_line_debug, _("\ |
| 27191 | Set debugging of the dwarf line reader."), _("\ |
| 27192 | Show debugging of the dwarf line reader."), _("\ |
| 27193 | When enabled (non-zero), line number entries are dumped as they are read in.\n\ |
| 27194 | A value of 1 (one) provides basic information.\n\ |
| 27195 | A value greater than 1 provides more verbose information."), |
| 27196 | NULL, |
| 27197 | NULL, |
| 27198 | &setdebuglist, &showdebuglist); |
| 27199 | |
| 27200 | add_setshow_boolean_cmd ("check-physname", no_class, &check_physname, _("\ |
| 27201 | Set cross-checking of \"physname\" code against demangler."), _("\ |
| 27202 | Show cross-checking of \"physname\" code against demangler."), _("\ |
| 27203 | When enabled, GDB's internal \"physname\" code is checked against\n\ |
| 27204 | the demangler."), |
| 27205 | NULL, show_check_physname, |
| 27206 | &setdebuglist, &showdebuglist); |
| 27207 | |
| 27208 | add_setshow_boolean_cmd ("use-deprecated-index-sections", |
| 27209 | no_class, &use_deprecated_index_sections, _("\ |
| 27210 | Set whether to use deprecated gdb_index sections."), _("\ |
| 27211 | Show whether to use deprecated gdb_index sections."), _("\ |
| 27212 | When enabled, deprecated .gdb_index sections are used anyway.\n\ |
| 27213 | Normally they are ignored either because of a missing feature or\n\ |
| 27214 | performance issue.\n\ |
| 27215 | Warning: This option must be enabled before gdb reads the file."), |
| 27216 | NULL, |
| 27217 | NULL, |
| 27218 | &setlist, &showlist); |
| 27219 | |
| 27220 | c = add_cmd ("gdb-index", class_files, save_gdb_index_command, |
| 27221 | _("\ |
| 27222 | Save a gdb-index file.\n\ |
| 27223 | Usage: save gdb-index [-dwarf-5] DIRECTORY\n\ |
| 27224 | \n\ |
| 27225 | No options create one file with .gdb-index extension for pre-DWARF-5\n\ |
| 27226 | compatible .gdb_index section. With -dwarf-5 creates two files with\n\ |
| 27227 | extension .debug_names and .debug_str for DWARF-5 .debug_names section."), |
| 27228 | &save_cmdlist); |
| 27229 | set_cmd_completer (c, filename_completer); |
| 27230 | |
| 27231 | dwarf2_locexpr_index = register_symbol_computed_impl (LOC_COMPUTED, |
| 27232 | &dwarf2_locexpr_funcs); |
| 27233 | dwarf2_loclist_index = register_symbol_computed_impl (LOC_COMPUTED, |
| 27234 | &dwarf2_loclist_funcs); |
| 27235 | |
| 27236 | dwarf2_locexpr_block_index = register_symbol_block_impl (LOC_BLOCK, |
| 27237 | &dwarf2_block_frame_base_locexpr_funcs); |
| 27238 | dwarf2_loclist_block_index = register_symbol_block_impl (LOC_BLOCK, |
| 27239 | &dwarf2_block_frame_base_loclist_funcs); |
| 27240 | |
| 27241 | #if GDB_SELF_TEST |
| 27242 | selftests::register_test ("dw2_expand_symtabs_matching", |
| 27243 | selftests::dw2_expand_symtabs_matching::run_test); |
| 27244 | #endif |
| 27245 | } |