1 //===-- DWARFDebugInfoEntry.cpp -------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "DWARFDebugInfoEntry.h" 10 11 #include <cassert> 12 13 #include <algorithm> 14 #include <limits> 15 #include <optional> 16 17 #include "llvm/Support/LEB128.h" 18 19 #include "lldb/Core/Module.h" 20 #include "lldb/Expression/DWARFExpression.h" 21 #include "lldb/Symbol/ObjectFile.h" 22 #include "lldb/Utility/Stream.h" 23 #include "lldb/Utility/StreamString.h" 24 25 #include "DWARFCompileUnit.h" 26 #include "DWARFDebugAranges.h" 27 #include "DWARFDebugInfo.h" 28 #include "DWARFDebugRanges.h" 29 #include "DWARFDeclContext.h" 30 #include "DWARFFormValue.h" 31 #include "DWARFUnit.h" 32 #include "SymbolFileDWARF.h" 33 #include "SymbolFileDWARFDwo.h" 34 35 #include "llvm/DebugInfo/DWARF/DWARFDebugAbbrev.h" 36 37 using namespace lldb_private; 38 using namespace lldb_private::dwarf; 39 using namespace lldb_private::plugin::dwarf; 40 extern int g_verbose; 41 42 // Extract a debug info entry for a given DWARFUnit from the data 43 // starting at the offset in offset_ptr 44 bool DWARFDebugInfoEntry::Extract(const DWARFDataExtractor &data, 45 const DWARFUnit &unit, 46 lldb::offset_t *offset_ptr) { 47 m_offset = *offset_ptr; 48 auto report_error = [&](const char *fmt, const auto &...vals) { 49 unit.GetSymbolFileDWARF().GetObjectFile()->GetModule()->ReportError( 50 "[{0:x16}]: {1}, please file a bug and " 51 "attach the file at the start of this error message", 52 static_cast<uint64_t>(m_offset), llvm::formatv(fmt, vals...)); 53 *offset_ptr = std::numeric_limits<lldb::offset_t>::max(); 54 return false; 55 }; 56 57 m_parent_idx = 0; 58 m_sibling_idx = 0; 59 const uint64_t abbr_idx = data.GetULEB128(offset_ptr); 60 if (abbr_idx > std::numeric_limits<uint16_t>::max()) 61 return report_error("abbreviation code {0} too big", abbr_idx); 62 m_abbr_idx = abbr_idx; 63 64 if (m_abbr_idx == 0) { 65 m_tag = llvm::dwarf::DW_TAG_null; 66 m_has_children = false; 67 return true; // NULL debug tag entry 68 } 69 70 const auto *abbrevDecl = GetAbbreviationDeclarationPtr(&unit); 71 if (abbrevDecl == nullptr) 72 return report_error("invalid abbreviation code {0}", abbr_idx); 73 74 m_tag = abbrevDecl->getTag(); 75 m_has_children = abbrevDecl->hasChildren(); 76 // Skip all data in the .debug_info or .debug_types for the attributes 77 for (const auto &attribute : abbrevDecl->attributes()) { 78 if (DWARFFormValue::SkipValue(attribute.Form, data, offset_ptr, &unit)) 79 continue; 80 81 return report_error("Unsupported DW_FORM_{1:x}", attribute.Form); 82 } 83 return true; 84 } 85 86 static DWARFRangeList GetRangesOrReportError(DWARFUnit &unit, 87 const DWARFDebugInfoEntry &die, 88 const DWARFFormValue &value) { 89 llvm::Expected<DWARFRangeList> expected_ranges = 90 (value.Form() == DW_FORM_rnglistx) 91 ? unit.FindRnglistFromIndex(value.Unsigned()) 92 : unit.FindRnglistFromOffset(value.Unsigned()); 93 if (expected_ranges) 94 return std::move(*expected_ranges); 95 96 unit.GetSymbolFileDWARF().GetObjectFile()->GetModule()->ReportError( 97 "[{0:x16}]: DIE has DW_AT_ranges({1} {2:x16}) attribute, but " 98 "range extraction failed ({3}), please file a bug " 99 "and attach the file at the start of this error message", 100 die.GetOffset(), 101 llvm::dwarf::FormEncodingString(value.Form()).str().c_str(), 102 value.Unsigned(), toString(expected_ranges.takeError()).c_str()); 103 return DWARFRangeList(); 104 } 105 106 static void ExtractAttrAndFormValue( 107 const llvm::DWARFAbbreviationDeclaration::AttributeSpec &attr_spec, 108 dw_attr_t &attr, DWARFFormValue &form_value) { 109 attr = attr_spec.Attr; 110 form_value.FormRef() = attr_spec.Form; 111 if (attr_spec.isImplicitConst()) 112 form_value.SetSigned(attr_spec.getImplicitConstValue()); 113 } 114 115 // GetDIENamesAndRanges 116 // 117 // Gets the valid address ranges for a given DIE by looking for a 118 // DW_AT_low_pc/DW_AT_high_pc pair, DW_AT_entry_pc, or DW_AT_ranges attributes. 119 bool DWARFDebugInfoEntry::GetDIENamesAndRanges( 120 DWARFUnit *cu, const char *&name, const char *&mangled, 121 DWARFRangeList &ranges, std::optional<int> &decl_file, 122 std::optional<int> &decl_line, std::optional<int> &decl_column, 123 std::optional<int> &call_file, std::optional<int> &call_line, 124 std::optional<int> &call_column, DWARFExpressionList *frame_base) const { 125 dw_addr_t lo_pc = LLDB_INVALID_ADDRESS; 126 dw_addr_t hi_pc = LLDB_INVALID_ADDRESS; 127 std::vector<DWARFDIE> dies; 128 bool set_frame_base_loclist_addr = false; 129 130 SymbolFileDWARF &dwarf = cu->GetSymbolFileDWARF(); 131 lldb::ModuleSP module = dwarf.GetObjectFile()->GetModule(); 132 133 if (const auto *abbrevDecl = GetAbbreviationDeclarationPtr(cu)) { 134 const DWARFDataExtractor &data = cu->GetData(); 135 lldb::offset_t offset = GetFirstAttributeOffset(); 136 137 if (!data.ValidOffset(offset)) 138 return false; 139 140 bool do_offset = false; 141 142 for (const auto &attribute : abbrevDecl->attributes()) { 143 DWARFFormValue form_value(cu); 144 dw_attr_t attr; 145 ExtractAttrAndFormValue(attribute, attr, form_value); 146 147 if (form_value.ExtractValue(data, &offset)) { 148 switch (attr) { 149 case DW_AT_low_pc: 150 lo_pc = form_value.Address(); 151 152 if (do_offset) 153 hi_pc += lo_pc; 154 do_offset = false; 155 break; 156 157 case DW_AT_entry_pc: 158 lo_pc = form_value.Address(); 159 break; 160 161 case DW_AT_high_pc: 162 if (form_value.Form() == DW_FORM_addr || 163 form_value.Form() == DW_FORM_addrx || 164 form_value.Form() == DW_FORM_GNU_addr_index) { 165 hi_pc = form_value.Address(); 166 } else { 167 hi_pc = form_value.Unsigned(); 168 if (lo_pc == LLDB_INVALID_ADDRESS) 169 do_offset = hi_pc != LLDB_INVALID_ADDRESS; 170 else 171 hi_pc += lo_pc; // DWARF 4 introduces <offset-from-lo-pc> to save 172 // on relocations 173 } 174 break; 175 176 case DW_AT_ranges: 177 ranges = GetRangesOrReportError(*cu, *this, form_value); 178 break; 179 180 case DW_AT_name: 181 if (name == nullptr) 182 name = form_value.AsCString(); 183 break; 184 185 case DW_AT_MIPS_linkage_name: 186 case DW_AT_linkage_name: 187 if (mangled == nullptr) 188 mangled = form_value.AsCString(); 189 break; 190 191 case DW_AT_abstract_origin: 192 dies.push_back(form_value.Reference()); 193 break; 194 195 case DW_AT_specification: 196 dies.push_back(form_value.Reference()); 197 break; 198 199 case DW_AT_decl_file: 200 if (!decl_file) 201 decl_file = form_value.Unsigned(); 202 break; 203 204 case DW_AT_decl_line: 205 if (!decl_line) 206 decl_line = form_value.Unsigned(); 207 break; 208 209 case DW_AT_decl_column: 210 if (!decl_column) 211 decl_column = form_value.Unsigned(); 212 break; 213 214 case DW_AT_call_file: 215 if (!call_file) 216 call_file = form_value.Unsigned(); 217 break; 218 219 case DW_AT_call_line: 220 if (!call_line) 221 call_line = form_value.Unsigned(); 222 break; 223 224 case DW_AT_call_column: 225 if (!call_column) 226 call_column = form_value.Unsigned(); 227 break; 228 229 case DW_AT_frame_base: 230 if (frame_base) { 231 if (form_value.BlockData()) { 232 uint32_t block_offset = 233 form_value.BlockData() - data.GetDataStart(); 234 uint32_t block_length = form_value.Unsigned(); 235 *frame_base = 236 DWARFExpressionList(module, 237 DWARFExpression(DataExtractor( 238 data, block_offset, block_length)), 239 cu); 240 } else { 241 DataExtractor data = cu->GetLocationData(); 242 const dw_offset_t offset = form_value.Unsigned(); 243 if (data.ValidOffset(offset)) { 244 data = DataExtractor(data, offset, data.GetByteSize() - offset); 245 if (lo_pc != LLDB_INVALID_ADDRESS) { 246 assert(lo_pc >= cu->GetBaseAddress()); 247 DWARFExpression::ParseDWARFLocationList(cu, data, frame_base); 248 frame_base->SetFuncFileAddress(lo_pc); 249 } else 250 set_frame_base_loclist_addr = true; 251 } 252 } 253 } 254 break; 255 256 default: 257 break; 258 } 259 } 260 } 261 } 262 263 if (ranges.IsEmpty()) { 264 if (lo_pc != LLDB_INVALID_ADDRESS) { 265 if (hi_pc != LLDB_INVALID_ADDRESS && hi_pc > lo_pc) 266 ranges.Append(DWARFRangeList::Entry(lo_pc, hi_pc - lo_pc)); 267 else 268 ranges.Append(DWARFRangeList::Entry(lo_pc, 0)); 269 } 270 } 271 272 if (set_frame_base_loclist_addr) { 273 dw_addr_t lowest_range_pc = ranges.GetMinRangeBase(0); 274 assert(lowest_range_pc >= cu->GetBaseAddress()); 275 frame_base->SetFuncFileAddress(lowest_range_pc); 276 } 277 278 if (ranges.IsEmpty() || name == nullptr || mangled == nullptr) { 279 for (const DWARFDIE &die : dies) { 280 if (die) { 281 die.GetDIE()->GetDIENamesAndRanges(die.GetCU(), name, mangled, ranges, 282 decl_file, decl_line, decl_column, 283 call_file, call_line, call_column); 284 } 285 } 286 } 287 return !ranges.IsEmpty(); 288 } 289 290 // Get all attribute values for a given DIE, including following any 291 // specification or abstract origin attributes and including those in the 292 // results. Any duplicate attributes will have the first instance take 293 // precedence (this can happen for declaration attributes). 294 void DWARFDebugInfoEntry::GetAttributes(DWARFUnit *cu, 295 DWARFAttributes &attributes, 296 Recurse recurse, 297 uint32_t curr_depth) const { 298 const auto *abbrevDecl = GetAbbreviationDeclarationPtr(cu); 299 if (!abbrevDecl) { 300 attributes.Clear(); 301 return; 302 } 303 304 const DWARFDataExtractor &data = cu->GetData(); 305 lldb::offset_t offset = GetFirstAttributeOffset(); 306 307 for (const auto &attribute : abbrevDecl->attributes()) { 308 DWARFFormValue form_value(cu); 309 dw_attr_t attr; 310 ExtractAttrAndFormValue(attribute, attr, form_value); 311 312 // If we are tracking down DW_AT_specification or DW_AT_abstract_origin 313 // attributes, the depth will be non-zero. We need to omit certain 314 // attributes that don't make sense. 315 switch (attr) { 316 case DW_AT_sibling: 317 case DW_AT_declaration: 318 if (curr_depth > 0) { 319 // This attribute doesn't make sense when combined with the DIE that 320 // references this DIE. We know a DIE is referencing this DIE because 321 // curr_depth is not zero 322 break; 323 } 324 [[fallthrough]]; 325 default: 326 attributes.Append(form_value, offset, attr); 327 break; 328 } 329 330 if (recurse == Recurse::yes && 331 ((attr == DW_AT_specification) || (attr == DW_AT_abstract_origin))) { 332 if (form_value.ExtractValue(data, &offset)) { 333 DWARFDIE spec_die = form_value.Reference(); 334 if (spec_die) 335 spec_die.GetDIE()->GetAttributes(spec_die.GetCU(), attributes, 336 recurse, curr_depth + 1); 337 } 338 } else { 339 const dw_form_t form = form_value.Form(); 340 std::optional<uint8_t> fixed_skip_size = 341 DWARFFormValue::GetFixedSize(form, cu); 342 if (fixed_skip_size) 343 offset += *fixed_skip_size; 344 else 345 DWARFFormValue::SkipValue(form, data, &offset, cu); 346 } 347 } 348 } 349 350 // GetAttributeValue 351 // 352 // Get the value of an attribute and return the .debug_info or .debug_types 353 // offset of the attribute if it was properly extracted into form_value, 354 // or zero if we fail since an offset of zero is invalid for an attribute (it 355 // would be a compile unit header). 356 dw_offset_t DWARFDebugInfoEntry::GetAttributeValue( 357 const DWARFUnit *cu, const dw_attr_t attr, DWARFFormValue &form_value, 358 dw_offset_t *end_attr_offset_ptr, 359 bool check_specification_or_abstract_origin) const { 360 if (const auto *abbrevDecl = GetAbbreviationDeclarationPtr(cu)) { 361 std::optional<uint32_t> attr_idx = abbrevDecl->findAttributeIndex(attr); 362 363 if (attr_idx) { 364 const DWARFDataExtractor &data = cu->GetData(); 365 lldb::offset_t offset = GetFirstAttributeOffset(); 366 367 uint32_t idx = 0; 368 while (idx < *attr_idx) 369 DWARFFormValue::SkipValue(abbrevDecl->getFormByIndex(idx++), data, 370 &offset, cu); 371 372 const dw_offset_t attr_offset = offset; 373 form_value.SetUnit(cu); 374 form_value.SetForm(abbrevDecl->getFormByIndex(idx)); 375 if (form_value.ExtractValue(data, &offset)) { 376 if (end_attr_offset_ptr) 377 *end_attr_offset_ptr = offset; 378 return attr_offset; 379 } 380 } 381 } 382 383 if (check_specification_or_abstract_origin) { 384 if (GetAttributeValue(cu, DW_AT_specification, form_value)) { 385 DWARFDIE die = form_value.Reference(); 386 if (die) { 387 dw_offset_t die_offset = die.GetDIE()->GetAttributeValue( 388 die.GetCU(), attr, form_value, end_attr_offset_ptr, false); 389 if (die_offset) 390 return die_offset; 391 } 392 } 393 394 if (GetAttributeValue(cu, DW_AT_abstract_origin, form_value)) { 395 DWARFDIE die = form_value.Reference(); 396 if (die) { 397 dw_offset_t die_offset = die.GetDIE()->GetAttributeValue( 398 die.GetCU(), attr, form_value, end_attr_offset_ptr, false); 399 if (die_offset) 400 return die_offset; 401 } 402 } 403 } 404 return 0; 405 } 406 407 // GetAttributeValueAsString 408 // 409 // Get the value of an attribute as a string return it. The resulting pointer 410 // to the string data exists within the supplied SymbolFileDWARF and will only 411 // be available as long as the SymbolFileDWARF is still around and it's content 412 // doesn't change. 413 const char *DWARFDebugInfoEntry::GetAttributeValueAsString( 414 const DWARFUnit *cu, const dw_attr_t attr, const char *fail_value, 415 bool check_specification_or_abstract_origin) const { 416 DWARFFormValue form_value; 417 if (GetAttributeValue(cu, attr, form_value, nullptr, 418 check_specification_or_abstract_origin)) 419 return form_value.AsCString(); 420 return fail_value; 421 } 422 423 // GetAttributeValueAsUnsigned 424 // 425 // Get the value of an attribute as unsigned and return it. 426 uint64_t DWARFDebugInfoEntry::GetAttributeValueAsUnsigned( 427 const DWARFUnit *cu, const dw_attr_t attr, uint64_t fail_value, 428 bool check_specification_or_abstract_origin) const { 429 DWARFFormValue form_value; 430 if (GetAttributeValue(cu, attr, form_value, nullptr, 431 check_specification_or_abstract_origin)) 432 return form_value.Unsigned(); 433 return fail_value; 434 } 435 436 std::optional<uint64_t> 437 DWARFDebugInfoEntry::GetAttributeValueAsOptionalUnsigned( 438 const DWARFUnit *cu, const dw_attr_t attr, 439 bool check_specification_or_abstract_origin) const { 440 DWARFFormValue form_value; 441 if (GetAttributeValue(cu, attr, form_value, nullptr, 442 check_specification_or_abstract_origin)) 443 return form_value.Unsigned(); 444 return std::nullopt; 445 } 446 447 // GetAttributeValueAsReference 448 // 449 // Get the value of an attribute as reference and fix up and compile unit 450 // relative offsets as needed. 451 DWARFDIE DWARFDebugInfoEntry::GetAttributeValueAsReference( 452 const DWARFUnit *cu, const dw_attr_t attr, 453 bool check_specification_or_abstract_origin) const { 454 DWARFFormValue form_value; 455 if (GetAttributeValue(cu, attr, form_value, nullptr, 456 check_specification_or_abstract_origin)) 457 return form_value.Reference(); 458 return {}; 459 } 460 461 uint64_t DWARFDebugInfoEntry::GetAttributeValueAsAddress( 462 const DWARFUnit *cu, const dw_attr_t attr, uint64_t fail_value, 463 bool check_specification_or_abstract_origin) const { 464 DWARFFormValue form_value; 465 if (GetAttributeValue(cu, attr, form_value, nullptr, 466 check_specification_or_abstract_origin)) 467 return form_value.Address(); 468 return fail_value; 469 } 470 471 // GetAttributeHighPC 472 // 473 // Get the hi_pc, adding hi_pc to lo_pc when specified as an <offset-from-low- 474 // pc>. 475 // 476 // Returns the hi_pc or fail_value. 477 dw_addr_t DWARFDebugInfoEntry::GetAttributeHighPC( 478 const DWARFUnit *cu, dw_addr_t lo_pc, uint64_t fail_value, 479 bool check_specification_or_abstract_origin) const { 480 DWARFFormValue form_value; 481 if (GetAttributeValue(cu, DW_AT_high_pc, form_value, nullptr, 482 check_specification_or_abstract_origin)) { 483 dw_form_t form = form_value.Form(); 484 if (form == DW_FORM_addr || form == DW_FORM_addrx || 485 form == DW_FORM_GNU_addr_index) 486 return form_value.Address(); 487 488 // DWARF4 can specify the hi_pc as an <offset-from-lowpc> 489 return lo_pc + form_value.Unsigned(); 490 } 491 return fail_value; 492 } 493 494 // GetAttributeAddressRange 495 // 496 // Get the lo_pc and hi_pc, adding hi_pc to lo_pc when specified as an <offset- 497 // from-low-pc>. 498 // 499 // Returns true or sets lo_pc and hi_pc to fail_value. 500 bool DWARFDebugInfoEntry::GetAttributeAddressRange( 501 const DWARFUnit *cu, dw_addr_t &lo_pc, dw_addr_t &hi_pc, 502 uint64_t fail_value, bool check_specification_or_abstract_origin) const { 503 lo_pc = GetAttributeValueAsAddress(cu, DW_AT_low_pc, fail_value, 504 check_specification_or_abstract_origin); 505 if (lo_pc != fail_value) { 506 hi_pc = GetAttributeHighPC(cu, lo_pc, fail_value, 507 check_specification_or_abstract_origin); 508 if (hi_pc != fail_value) 509 return true; 510 } 511 lo_pc = fail_value; 512 hi_pc = fail_value; 513 return false; 514 } 515 516 DWARFRangeList DWARFDebugInfoEntry::GetAttributeAddressRanges( 517 DWARFUnit *cu, bool check_hi_lo_pc, 518 bool check_specification_or_abstract_origin) const { 519 520 DWARFFormValue form_value; 521 if (GetAttributeValue(cu, DW_AT_ranges, form_value)) 522 return GetRangesOrReportError(*cu, *this, form_value); 523 524 DWARFRangeList ranges; 525 if (check_hi_lo_pc) { 526 dw_addr_t lo_pc = LLDB_INVALID_ADDRESS; 527 dw_addr_t hi_pc = LLDB_INVALID_ADDRESS; 528 if (GetAttributeAddressRange(cu, lo_pc, hi_pc, LLDB_INVALID_ADDRESS, 529 check_specification_or_abstract_origin)) { 530 if (lo_pc < hi_pc) 531 ranges.Append(DWARFRangeList::Entry(lo_pc, hi_pc - lo_pc)); 532 } 533 } 534 return ranges; 535 } 536 537 // GetName 538 // 539 // Get value of the DW_AT_name attribute and return it if one exists, else 540 // return NULL. 541 const char *DWARFDebugInfoEntry::GetName(const DWARFUnit *cu) const { 542 return GetAttributeValueAsString(cu, DW_AT_name, nullptr, true); 543 } 544 545 // GetMangledName 546 // 547 // Get value of the DW_AT_MIPS_linkage_name attribute and return it if one 548 // exists, else return the value of the DW_AT_name attribute 549 const char * 550 DWARFDebugInfoEntry::GetMangledName(const DWARFUnit *cu, 551 bool substitute_name_allowed) const { 552 const char *name = nullptr; 553 554 name = GetAttributeValueAsString(cu, DW_AT_MIPS_linkage_name, nullptr, true); 555 if (name) 556 return name; 557 558 name = GetAttributeValueAsString(cu, DW_AT_linkage_name, nullptr, true); 559 if (name) 560 return name; 561 562 if (!substitute_name_allowed) 563 return nullptr; 564 565 name = GetAttributeValueAsString(cu, DW_AT_name, nullptr, true); 566 return name; 567 } 568 569 // GetPubname 570 // 571 // Get value the name for a DIE as it should appear for a .debug_pubnames or 572 // .debug_pubtypes section. 573 const char *DWARFDebugInfoEntry::GetPubname(const DWARFUnit *cu) const { 574 const char *name = nullptr; 575 if (!cu) 576 return name; 577 578 name = GetAttributeValueAsString(cu, DW_AT_MIPS_linkage_name, nullptr, true); 579 if (name) 580 return name; 581 582 name = GetAttributeValueAsString(cu, DW_AT_linkage_name, nullptr, true); 583 if (name) 584 return name; 585 586 name = GetAttributeValueAsString(cu, DW_AT_name, nullptr, true); 587 return name; 588 } 589 590 /// This function is builds a table very similar to the standard .debug_aranges 591 /// table, except that the actual DIE offset for the function is placed in the 592 /// table instead of the compile unit offset. 593 void DWARFDebugInfoEntry::BuildFunctionAddressRangeTable( 594 DWARFUnit *cu, DWARFDebugAranges *debug_aranges) const { 595 if (m_tag) { 596 if (m_tag == DW_TAG_subprogram) { 597 DWARFRangeList ranges = 598 GetAttributeAddressRanges(cu, /*check_hi_lo_pc=*/true); 599 for (const auto &r : ranges) { 600 debug_aranges->AppendRange(GetOffset(), r.GetRangeBase(), 601 r.GetRangeEnd()); 602 } 603 } 604 605 const DWARFDebugInfoEntry *child = GetFirstChild(); 606 while (child) { 607 child->BuildFunctionAddressRangeTable(cu, debug_aranges); 608 child = child->GetSibling(); 609 } 610 } 611 } 612 613 lldb::offset_t DWARFDebugInfoEntry::GetFirstAttributeOffset() const { 614 return GetOffset() + llvm::getULEB128Size(m_abbr_idx); 615 } 616 617 const llvm::DWARFAbbreviationDeclaration * 618 DWARFDebugInfoEntry::GetAbbreviationDeclarationPtr(const DWARFUnit *cu) const { 619 if (!cu) 620 return nullptr; 621 622 const llvm::DWARFAbbreviationDeclarationSet *abbrev_set = 623 cu->GetAbbreviations(); 624 if (!abbrev_set) 625 return nullptr; 626 627 return abbrev_set->getAbbreviationDeclaration(m_abbr_idx); 628 } 629 630 bool DWARFDebugInfoEntry::IsGlobalOrStaticScopeVariable() const { 631 if (Tag() != DW_TAG_variable) 632 return false; 633 const DWARFDebugInfoEntry *parent_die = GetParent(); 634 while (parent_die != nullptr) { 635 switch (parent_die->Tag()) { 636 case DW_TAG_subprogram: 637 case DW_TAG_lexical_block: 638 case DW_TAG_inlined_subroutine: 639 return false; 640 641 case DW_TAG_compile_unit: 642 case DW_TAG_partial_unit: 643 return true; 644 645 default: 646 break; 647 } 648 parent_die = parent_die->GetParent(); 649 } 650 return false; 651 } 652 653 bool DWARFDebugInfoEntry::operator==(const DWARFDebugInfoEntry &rhs) const { 654 return m_offset == rhs.m_offset && m_parent_idx == rhs.m_parent_idx && 655 m_sibling_idx == rhs.m_sibling_idx && 656 m_abbr_idx == rhs.m_abbr_idx && m_has_children == rhs.m_has_children && 657 m_tag == rhs.m_tag; 658 } 659 660 bool DWARFDebugInfoEntry::operator!=(const DWARFDebugInfoEntry &rhs) const { 661 return !(*this == rhs); 662 } 663