1 //===-- DWARFDebugInfoEntry.cpp ---------------------------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include "DWARFDebugInfoEntry.h" 11 12 #include <assert.h> 13 14 #include <algorithm> 15 16 #include "lldb/Core/Module.h" 17 #include "lldb/Expression/DWARFExpression.h" 18 #include "lldb/Symbol/ObjectFile.h" 19 #include "lldb/Utility/Stream.h" 20 21 #include "DWARFUnit.h" 22 #include "DWARFDIECollection.h" 23 #include "DWARFDebugAbbrev.h" 24 #include "DWARFDebugAranges.h" 25 #include "DWARFDebugInfo.h" 26 #include "DWARFDebugRanges.h" 27 #include "DWARFDeclContext.h" 28 #include "DWARFFormValue.h" 29 #include "SymbolFileDWARF.h" 30 #include "SymbolFileDWARFDwo.h" 31 32 using namespace lldb_private; 33 using namespace std; 34 extern int g_verbose; 35 36 bool DWARFDebugInfoEntry::FastExtract( 37 const DWARFDataExtractor &debug_info_data, const DWARFUnit *cu, 38 const DWARFFormValue::FixedFormSizes &fixed_form_sizes, 39 lldb::offset_t *offset_ptr) { 40 m_offset = *offset_ptr; 41 m_parent_idx = 0; 42 m_sibling_idx = 0; 43 const uint64_t abbr_idx = debug_info_data.GetULEB128(offset_ptr); 44 lldbassert(abbr_idx <= UINT16_MAX); 45 m_abbr_idx = abbr_idx; 46 47 // assert (fixed_form_sizes); // For best performance this should be 48 // specified! 49 50 if (m_abbr_idx) { 51 lldb::offset_t offset = *offset_ptr; 52 53 const DWARFAbbreviationDeclaration *abbrevDecl = 54 cu->GetAbbreviations()->GetAbbreviationDeclaration(m_abbr_idx); 55 56 if (abbrevDecl == NULL) { 57 cu->GetSymbolFileDWARF()->GetObjectFile()->GetModule()->ReportError( 58 "{0x%8.8x}: invalid abbreviation code %u, please file a bug and " 59 "attach the file at the start of this error message", 60 m_offset, (unsigned)abbr_idx); 61 // WE can't parse anymore if the DWARF is borked... 62 *offset_ptr = UINT32_MAX; 63 return false; 64 } 65 m_tag = abbrevDecl->Tag(); 66 m_has_children = abbrevDecl->HasChildren(); 67 // Skip all data in the .debug_info for the attributes 68 const uint32_t numAttributes = abbrevDecl->NumAttributes(); 69 uint32_t i; 70 dw_form_t form; 71 for (i = 0; i < numAttributes; ++i) { 72 form = abbrevDecl->GetFormByIndexUnchecked(i); 73 74 const uint8_t fixed_skip_size = fixed_form_sizes.GetSize(form); 75 if (fixed_skip_size) 76 offset += fixed_skip_size; 77 else { 78 bool form_is_indirect = false; 79 do { 80 form_is_indirect = false; 81 uint32_t form_size = 0; 82 switch (form) { 83 // Blocks if inlined data that have a length field and the data bytes 84 // inlined in the .debug_info 85 case DW_FORM_exprloc: 86 case DW_FORM_block: 87 form_size = debug_info_data.GetULEB128(&offset); 88 break; 89 case DW_FORM_block1: 90 form_size = debug_info_data.GetU8_unchecked(&offset); 91 break; 92 case DW_FORM_block2: 93 form_size = debug_info_data.GetU16_unchecked(&offset); 94 break; 95 case DW_FORM_block4: 96 form_size = debug_info_data.GetU32_unchecked(&offset); 97 break; 98 99 // Inlined NULL terminated C-strings 100 case DW_FORM_string: 101 debug_info_data.GetCStr(&offset); 102 break; 103 104 // Compile unit address sized values 105 case DW_FORM_addr: 106 form_size = cu->GetAddressByteSize(); 107 break; 108 case DW_FORM_ref_addr: 109 if (cu->GetVersion() <= 2) 110 form_size = cu->GetAddressByteSize(); 111 else 112 form_size = cu->IsDWARF64() ? 8 : 4; 113 break; 114 115 // 0 sized form 116 case DW_FORM_flag_present: 117 form_size = 0; 118 break; 119 120 // 1 byte values 121 case DW_FORM_data1: 122 case DW_FORM_flag: 123 case DW_FORM_ref1: 124 case DW_FORM_strx1: 125 form_size = 1; 126 break; 127 128 // 2 byte values 129 case DW_FORM_data2: 130 case DW_FORM_ref2: 131 case DW_FORM_strx2: 132 form_size = 2; 133 break; 134 135 case DW_FORM_strx3: 136 form_size = 3; 137 break; 138 139 // 4 byte values 140 case DW_FORM_data4: 141 case DW_FORM_ref4: 142 case DW_FORM_strx4: 143 form_size = 4; 144 break; 145 146 // 8 byte values 147 case DW_FORM_data8: 148 case DW_FORM_ref8: 149 case DW_FORM_ref_sig8: 150 form_size = 8; 151 break; 152 153 // signed or unsigned LEB 128 values 154 case DW_FORM_sdata: 155 case DW_FORM_udata: 156 case DW_FORM_ref_udata: 157 case DW_FORM_GNU_addr_index: 158 case DW_FORM_GNU_str_index: 159 case DW_FORM_strx: 160 debug_info_data.Skip_LEB128(&offset); 161 break; 162 163 case DW_FORM_indirect: 164 form_is_indirect = true; 165 form = debug_info_data.GetULEB128(&offset); 166 break; 167 168 case DW_FORM_strp: 169 case DW_FORM_sec_offset: 170 if (cu->IsDWARF64()) 171 debug_info_data.GetU64(&offset); 172 else 173 debug_info_data.GetU32(&offset); 174 break; 175 176 case DW_FORM_implicit_const: 177 form_size = 0; 178 break; 179 180 default: 181 *offset_ptr = m_offset; 182 return false; 183 } 184 offset += form_size; 185 186 } while (form_is_indirect); 187 } 188 } 189 *offset_ptr = offset; 190 return true; 191 } else { 192 m_tag = 0; 193 m_has_children = false; 194 return true; // NULL debug tag entry 195 } 196 197 return false; 198 } 199 200 //---------------------------------------------------------------------- 201 // Extract 202 // 203 // Extract a debug info entry for a given compile unit from the .debug_info and 204 // .debug_abbrev data within the SymbolFileDWARF class starting at the given 205 // offset 206 //---------------------------------------------------------------------- 207 bool DWARFDebugInfoEntry::Extract(SymbolFileDWARF *dwarf2Data, 208 const DWARFUnit *cu, 209 lldb::offset_t *offset_ptr) { 210 const DWARFDataExtractor &debug_info_data = cu->GetData(); 211 // const DWARFDataExtractor& debug_str_data = 212 // dwarf2Data->get_debug_str_data(); 213 const uint32_t cu_end_offset = cu->GetNextCompileUnitOffset(); 214 lldb::offset_t offset = *offset_ptr; 215 // if (offset >= cu_end_offset) 216 // Log::Status("DIE at offset 0x%8.8x is beyond the end of the current 217 // compile unit (0x%8.8x)", m_offset, cu_end_offset); 218 if ((offset < cu_end_offset) && debug_info_data.ValidOffset(offset)) { 219 m_offset = offset; 220 221 const uint64_t abbr_idx = debug_info_data.GetULEB128(&offset); 222 lldbassert(abbr_idx <= UINT16_MAX); 223 m_abbr_idx = abbr_idx; 224 if (abbr_idx) { 225 const DWARFAbbreviationDeclaration *abbrevDecl = 226 cu->GetAbbreviations()->GetAbbreviationDeclaration(abbr_idx); 227 228 if (abbrevDecl) { 229 m_tag = abbrevDecl->Tag(); 230 m_has_children = abbrevDecl->HasChildren(); 231 232 bool isCompileUnitTag = (m_tag == DW_TAG_compile_unit || 233 m_tag == DW_TAG_partial_unit); 234 if (cu && isCompileUnitTag) 235 const_cast<DWARFUnit *>(cu)->SetBaseAddress(0); 236 237 // Skip all data in the .debug_info for the attributes 238 const uint32_t numAttributes = abbrevDecl->NumAttributes(); 239 for (uint32_t i = 0; i < numAttributes; ++i) { 240 DWARFFormValue form_value(cu); 241 dw_attr_t attr; 242 abbrevDecl->GetAttrAndFormValueByIndex(i, attr, form_value); 243 dw_form_t form = form_value.Form(); 244 245 if (isCompileUnitTag && 246 ((attr == DW_AT_entry_pc) || (attr == DW_AT_low_pc))) { 247 if (form_value.ExtractValue(debug_info_data, &offset)) { 248 if (attr == DW_AT_low_pc || attr == DW_AT_entry_pc) 249 const_cast<DWARFUnit *>(cu)->SetBaseAddress( 250 form_value.Address()); 251 } 252 } else { 253 bool form_is_indirect = false; 254 do { 255 form_is_indirect = false; 256 uint32_t form_size = 0; 257 switch (form) { 258 // Blocks if inlined data that have a length field and the data 259 // bytes inlined in the .debug_info 260 case DW_FORM_exprloc: 261 case DW_FORM_block: 262 form_size = debug_info_data.GetULEB128(&offset); 263 break; 264 case DW_FORM_block1: 265 form_size = debug_info_data.GetU8(&offset); 266 break; 267 case DW_FORM_block2: 268 form_size = debug_info_data.GetU16(&offset); 269 break; 270 case DW_FORM_block4: 271 form_size = debug_info_data.GetU32(&offset); 272 break; 273 274 // Inlined NULL terminated C-strings 275 case DW_FORM_string: 276 debug_info_data.GetCStr(&offset); 277 break; 278 279 // Compile unit address sized values 280 case DW_FORM_addr: 281 form_size = cu->GetAddressByteSize(); 282 break; 283 case DW_FORM_ref_addr: 284 if (cu->GetVersion() <= 2) 285 form_size = cu->GetAddressByteSize(); 286 else 287 form_size = cu->IsDWARF64() ? 8 : 4; 288 break; 289 290 // 0 sized form 291 case DW_FORM_flag_present: 292 case DW_FORM_implicit_const: 293 form_size = 0; 294 break; 295 296 // 1 byte values 297 case DW_FORM_data1: 298 case DW_FORM_flag: 299 case DW_FORM_ref1: 300 form_size = 1; 301 break; 302 303 // 2 byte values 304 case DW_FORM_data2: 305 case DW_FORM_ref2: 306 form_size = 2; 307 break; 308 309 // 4 byte values 310 case DW_FORM_data4: 311 case DW_FORM_ref4: 312 form_size = 4; 313 break; 314 315 // 8 byte values 316 case DW_FORM_data8: 317 case DW_FORM_ref8: 318 case DW_FORM_ref_sig8: 319 form_size = 8; 320 break; 321 322 // signed or unsigned LEB 128 values 323 case DW_FORM_sdata: 324 case DW_FORM_udata: 325 case DW_FORM_ref_udata: 326 case DW_FORM_GNU_addr_index: 327 case DW_FORM_GNU_str_index: 328 debug_info_data.Skip_LEB128(&offset); 329 break; 330 331 case DW_FORM_indirect: 332 form = debug_info_data.GetULEB128(&offset); 333 form_is_indirect = true; 334 break; 335 336 case DW_FORM_strp: 337 case DW_FORM_sec_offset: 338 if (cu->IsDWARF64()) 339 debug_info_data.GetU64(&offset); 340 else 341 debug_info_data.GetU32(&offset); 342 break; 343 344 default: 345 *offset_ptr = offset; 346 return false; 347 } 348 349 offset += form_size; 350 } while (form_is_indirect); 351 } 352 } 353 *offset_ptr = offset; 354 return true; 355 } 356 } else { 357 m_tag = 0; 358 m_has_children = false; 359 *offset_ptr = offset; 360 return true; // NULL debug tag entry 361 } 362 } 363 364 return false; 365 } 366 367 //---------------------------------------------------------------------- 368 // DumpAncestry 369 // 370 // Dumps all of a debug information entries parents up until oldest and all of 371 // it's attributes to the specified stream. 372 //---------------------------------------------------------------------- 373 void DWARFDebugInfoEntry::DumpAncestry(SymbolFileDWARF *dwarf2Data, 374 const DWARFUnit *cu, 375 const DWARFDebugInfoEntry *oldest, 376 Stream &s, 377 uint32_t recurse_depth) const { 378 const DWARFDebugInfoEntry *parent = GetParent(); 379 if (parent && parent != oldest) 380 parent->DumpAncestry(dwarf2Data, cu, oldest, s, 0); 381 Dump(dwarf2Data, cu, s, recurse_depth); 382 } 383 384 //---------------------------------------------------------------------- 385 // GetDIENamesAndRanges 386 // 387 // Gets the valid address ranges for a given DIE by looking for a 388 // DW_AT_low_pc/DW_AT_high_pc pair, DW_AT_entry_pc, or DW_AT_ranges attributes. 389 //---------------------------------------------------------------------- 390 bool DWARFDebugInfoEntry::GetDIENamesAndRanges( 391 SymbolFileDWARF *dwarf2Data, const DWARFUnit *cu, const char *&name, 392 const char *&mangled, DWARFRangeList &ranges, int &decl_file, 393 int &decl_line, int &decl_column, int &call_file, int &call_line, 394 int &call_column, DWARFExpression *frame_base) const { 395 if (dwarf2Data == nullptr) 396 return false; 397 398 SymbolFileDWARFDwo *dwo_symbol_file = cu->GetDwoSymbolFile(); 399 if (dwo_symbol_file) 400 return GetDIENamesAndRanges( 401 dwo_symbol_file, dwo_symbol_file->GetCompileUnit(), name, mangled, 402 ranges, decl_file, decl_line, decl_column, call_file, call_line, 403 call_column, frame_base); 404 405 dw_addr_t lo_pc = LLDB_INVALID_ADDRESS; 406 dw_addr_t hi_pc = LLDB_INVALID_ADDRESS; 407 std::vector<DIERef> die_refs; 408 bool set_frame_base_loclist_addr = false; 409 410 lldb::offset_t offset; 411 const DWARFAbbreviationDeclaration *abbrevDecl = 412 GetAbbreviationDeclarationPtr(dwarf2Data, cu, offset); 413 414 lldb::ModuleSP module = dwarf2Data->GetObjectFile()->GetModule(); 415 416 if (abbrevDecl) { 417 const DWARFDataExtractor &debug_info_data = cu->GetData(); 418 419 if (!debug_info_data.ValidOffset(offset)) 420 return false; 421 422 const uint32_t numAttributes = abbrevDecl->NumAttributes(); 423 bool do_offset = false; 424 425 for (uint32_t i = 0; i < numAttributes; ++i) { 426 DWARFFormValue form_value(cu); 427 dw_attr_t attr; 428 abbrevDecl->GetAttrAndFormValueByIndex(i, attr, form_value); 429 430 if (form_value.ExtractValue(debug_info_data, &offset)) { 431 switch (attr) { 432 case DW_AT_low_pc: 433 lo_pc = form_value.Address(); 434 435 if (do_offset) 436 hi_pc += lo_pc; 437 do_offset = false; 438 break; 439 440 case DW_AT_entry_pc: 441 lo_pc = form_value.Address(); 442 break; 443 444 case DW_AT_high_pc: 445 if (form_value.Form() == DW_FORM_addr || 446 form_value.Form() == DW_FORM_GNU_addr_index) { 447 hi_pc = form_value.Address(); 448 } else { 449 hi_pc = form_value.Unsigned(); 450 if (lo_pc == LLDB_INVALID_ADDRESS) 451 do_offset = hi_pc != LLDB_INVALID_ADDRESS; 452 else 453 hi_pc += lo_pc; // DWARF 4 introduces <offset-from-lo-pc> to save 454 // on relocations 455 } 456 break; 457 458 case DW_AT_ranges: { 459 const DWARFDebugRangesBase *debug_ranges = dwarf2Data->DebugRanges(); 460 if (debug_ranges) 461 debug_ranges->FindRanges(cu, form_value.Unsigned(), ranges); 462 else 463 cu->GetSymbolFileDWARF()->GetObjectFile()->GetModule()->ReportError( 464 "{0x%8.8x}: DIE has DW_AT_ranges(0x%" PRIx64 465 ") attribute yet DWARF has no .debug_ranges, please file a bug " 466 "and attach the file at the start of this error message", 467 m_offset, form_value.Unsigned()); 468 } break; 469 470 case DW_AT_name: 471 if (name == NULL) 472 name = form_value.AsCString(); 473 break; 474 475 case DW_AT_MIPS_linkage_name: 476 case DW_AT_linkage_name: 477 if (mangled == NULL) 478 mangled = form_value.AsCString(); 479 break; 480 481 case DW_AT_abstract_origin: 482 die_refs.emplace_back(form_value); 483 break; 484 485 case DW_AT_specification: 486 die_refs.emplace_back(form_value); 487 break; 488 489 case DW_AT_decl_file: 490 if (decl_file == 0) 491 decl_file = form_value.Unsigned(); 492 break; 493 494 case DW_AT_decl_line: 495 if (decl_line == 0) 496 decl_line = form_value.Unsigned(); 497 break; 498 499 case DW_AT_decl_column: 500 if (decl_column == 0) 501 decl_column = form_value.Unsigned(); 502 break; 503 504 case DW_AT_call_file: 505 if (call_file == 0) 506 call_file = form_value.Unsigned(); 507 break; 508 509 case DW_AT_call_line: 510 if (call_line == 0) 511 call_line = form_value.Unsigned(); 512 break; 513 514 case DW_AT_call_column: 515 if (call_column == 0) 516 call_column = form_value.Unsigned(); 517 break; 518 519 case DW_AT_frame_base: 520 if (frame_base) { 521 if (form_value.BlockData()) { 522 uint32_t block_offset = 523 form_value.BlockData() - debug_info_data.GetDataStart(); 524 uint32_t block_length = form_value.Unsigned(); 525 frame_base->SetOpcodeData(module, debug_info_data, block_offset, 526 block_length); 527 } else { 528 const DWARFDataExtractor &debug_loc_data = 529 dwarf2Data->DebugLocData(); 530 const dw_offset_t debug_loc_offset = form_value.Unsigned(); 531 532 size_t loc_list_length = DWARFExpression::LocationListSize( 533 cu, debug_loc_data, debug_loc_offset); 534 if (loc_list_length > 0) { 535 frame_base->SetOpcodeData(module, debug_loc_data, 536 debug_loc_offset, loc_list_length); 537 if (lo_pc != LLDB_INVALID_ADDRESS) { 538 assert(lo_pc >= cu->GetBaseAddress()); 539 frame_base->SetLocationListSlide(lo_pc - 540 cu->GetBaseAddress()); 541 } else { 542 set_frame_base_loclist_addr = true; 543 } 544 } 545 } 546 } 547 break; 548 549 default: 550 break; 551 } 552 } 553 } 554 } 555 556 if (ranges.IsEmpty()) { 557 if (lo_pc != LLDB_INVALID_ADDRESS) { 558 if (hi_pc != LLDB_INVALID_ADDRESS && hi_pc > lo_pc) 559 ranges.Append(DWARFRangeList::Entry(lo_pc, hi_pc - lo_pc)); 560 else 561 ranges.Append(DWARFRangeList::Entry(lo_pc, 0)); 562 } 563 } 564 565 if (set_frame_base_loclist_addr) { 566 dw_addr_t lowest_range_pc = ranges.GetMinRangeBase(0); 567 assert(lowest_range_pc >= cu->GetBaseAddress()); 568 frame_base->SetLocationListSlide(lowest_range_pc - cu->GetBaseAddress()); 569 } 570 571 if (ranges.IsEmpty() || name == NULL || mangled == NULL) { 572 for (const DIERef &die_ref : die_refs) { 573 if (die_ref.die_offset != DW_INVALID_OFFSET) { 574 DWARFDIE die = dwarf2Data->GetDIE(die_ref); 575 if (die) 576 die.GetDIE()->GetDIENamesAndRanges( 577 die.GetDWARF(), die.GetCU(), name, mangled, ranges, decl_file, 578 decl_line, decl_column, call_file, call_line, call_column); 579 } 580 } 581 } 582 return !ranges.IsEmpty(); 583 } 584 585 //---------------------------------------------------------------------- 586 // Dump 587 // 588 // Dumps a debug information entry and all of it's attributes to the specified 589 // stream. 590 //---------------------------------------------------------------------- 591 void DWARFDebugInfoEntry::Dump(SymbolFileDWARF *dwarf2Data, 592 const DWARFUnit *cu, Stream &s, 593 uint32_t recurse_depth) const { 594 const DWARFDataExtractor &debug_info_data = cu->GetData(); 595 lldb::offset_t offset = m_offset; 596 597 if (debug_info_data.ValidOffset(offset)) { 598 dw_uleb128_t abbrCode = debug_info_data.GetULEB128(&offset); 599 600 s.Printf("\n0x%8.8x: ", m_offset); 601 s.Indent(); 602 if (abbrCode != m_abbr_idx) { 603 s.Printf("error: DWARF has been modified\n"); 604 } else if (abbrCode) { 605 const DWARFAbbreviationDeclaration *abbrevDecl = 606 cu->GetAbbreviations()->GetAbbreviationDeclaration(abbrCode); 607 608 if (abbrevDecl) { 609 s.PutCString(DW_TAG_value_to_name(abbrevDecl->Tag())); 610 s.Printf(" [%u] %c\n", abbrCode, abbrevDecl->HasChildren() ? '*' : ' '); 611 612 // Dump all data in the .debug_info for the attributes 613 const uint32_t numAttributes = abbrevDecl->NumAttributes(); 614 for (uint32_t i = 0; i < numAttributes; ++i) { 615 DWARFFormValue form_value(cu); 616 dw_attr_t attr; 617 abbrevDecl->GetAttrAndFormValueByIndex(i, attr, form_value); 618 619 DumpAttribute(dwarf2Data, cu, debug_info_data, &offset, s, attr, 620 form_value); 621 } 622 623 const DWARFDebugInfoEntry *child = GetFirstChild(); 624 if (recurse_depth > 0 && child) { 625 s.IndentMore(); 626 627 while (child) { 628 child->Dump(dwarf2Data, cu, s, recurse_depth - 1); 629 child = child->GetSibling(); 630 } 631 s.IndentLess(); 632 } 633 } else 634 s.Printf("Abbreviation code note found in 'debug_abbrev' class for " 635 "code: %u\n", 636 abbrCode); 637 } else { 638 s.Printf("NULL\n"); 639 } 640 } 641 } 642 643 void DWARFDebugInfoEntry::DumpLocation(SymbolFileDWARF *dwarf2Data, 644 DWARFUnit *cu, Stream &s) const { 645 const DWARFBaseDIE cu_die = cu->GetUnitDIEOnly(); 646 const char *cu_name = NULL; 647 if (cu_die) 648 cu_name = cu_die.GetName(); 649 const char *obj_file_name = NULL; 650 ObjectFile *obj_file = dwarf2Data->GetObjectFile(); 651 if (obj_file) 652 obj_file_name = 653 obj_file->GetFileSpec().GetFilename().AsCString("<Unknown>"); 654 const char *die_name = GetName(dwarf2Data, cu); 655 s.Printf("0x%8.8x/0x%8.8x: %-30s (from %s in %s)", cu->GetOffset(), 656 GetOffset(), die_name ? die_name : "", cu_name ? cu_name : "<NULL>", 657 obj_file_name ? obj_file_name : "<NULL>"); 658 } 659 660 //---------------------------------------------------------------------- 661 // DumpAttribute 662 // 663 // Dumps a debug information entry attribute along with it's form. Any special 664 // display of attributes is done (disassemble location lists, show enumeration 665 // values for attributes, etc). 666 //---------------------------------------------------------------------- 667 void DWARFDebugInfoEntry::DumpAttribute( 668 SymbolFileDWARF *dwarf2Data, const DWARFUnit *cu, 669 const DWARFDataExtractor &debug_info_data, lldb::offset_t *offset_ptr, 670 Stream &s, dw_attr_t attr, DWARFFormValue &form_value) { 671 bool show_form = s.GetFlags().Test(DWARFDebugInfo::eDumpFlag_ShowForm); 672 673 s.Printf(" "); 674 s.Indent(DW_AT_value_to_name(attr)); 675 676 if (show_form) { 677 s.Printf("[%s", DW_FORM_value_to_name(form_value.Form())); 678 } 679 680 if (!form_value.ExtractValue(debug_info_data, offset_ptr)) 681 return; 682 683 if (show_form) { 684 if (form_value.Form() == DW_FORM_indirect) { 685 s.Printf(" [%s]", DW_FORM_value_to_name(form_value.Form())); 686 } 687 688 s.PutCString("] "); 689 } 690 691 s.PutCString("( "); 692 693 // Check to see if we have any special attribute formatters 694 switch (attr) { 695 case DW_AT_stmt_list: 696 s.Printf("0x%8.8" PRIx64, form_value.Unsigned()); 697 break; 698 699 case DW_AT_language: 700 s.PutCString(DW_LANG_value_to_name(form_value.Unsigned())); 701 break; 702 703 case DW_AT_encoding: 704 s.PutCString(DW_ATE_value_to_name(form_value.Unsigned())); 705 break; 706 707 case DW_AT_frame_base: 708 case DW_AT_location: 709 case DW_AT_data_member_location: { 710 const uint8_t *blockData = form_value.BlockData(); 711 if (blockData) { 712 // Location description is inlined in data in the form value 713 DWARFDataExtractor locationData(debug_info_data, 714 (*offset_ptr) - form_value.Unsigned(), 715 form_value.Unsigned()); 716 DWARFExpression::PrintDWARFExpression( 717 s, locationData, DWARFUnit::GetAddressByteSize(cu), 4, false); 718 } else { 719 // We have a location list offset as the value that is the offset into 720 // the .debug_loc section that describes the value over it's lifetime 721 uint64_t debug_loc_offset = form_value.Unsigned(); 722 if (dwarf2Data) { 723 DWARFExpression::PrintDWARFLocationList( 724 s, cu, dwarf2Data->DebugLocData(), debug_loc_offset); 725 } 726 } 727 } break; 728 729 case DW_AT_abstract_origin: 730 case DW_AT_specification: { 731 uint64_t abstract_die_offset = form_value.Reference(); 732 form_value.Dump(s); 733 // *ostrm_ptr << HEX32 << abstract_die_offset << " ( "; 734 GetName(dwarf2Data, cu, abstract_die_offset, s); 735 } break; 736 737 case DW_AT_type: { 738 uint64_t type_die_offset = form_value.Reference(); 739 s.PutCString(" ( "); 740 AppendTypeName(dwarf2Data, cu, type_die_offset, s); 741 s.PutCString(" )"); 742 } break; 743 744 case DW_AT_ranges: { 745 lldb::offset_t ranges_offset = form_value.Unsigned(); 746 dw_addr_t base_addr = cu ? cu->GetBaseAddress() : 0; 747 if (dwarf2Data) 748 DWARFDebugRanges::Dump(s, dwarf2Data->get_debug_ranges_data(), 749 &ranges_offset, base_addr); 750 } break; 751 752 default: 753 break; 754 } 755 756 s.PutCString(" )\n"); 757 } 758 759 //---------------------------------------------------------------------- 760 // Get all attribute values for a given DIE, including following any 761 // specification or abstract origin attributes and including those in the 762 // results. Any duplicate attributes will have the first instance take 763 // precedence (this can happen for declaration attributes). 764 //---------------------------------------------------------------------- 765 size_t DWARFDebugInfoEntry::GetAttributes( 766 const DWARFUnit *cu, DWARFFormValue::FixedFormSizes fixed_form_sizes, 767 DWARFAttributes &attributes, uint32_t curr_depth) const { 768 SymbolFileDWARF *dwarf2Data = nullptr; 769 const DWARFAbbreviationDeclaration *abbrevDecl = nullptr; 770 lldb::offset_t offset = 0; 771 if (cu) { 772 if (m_tag != DW_TAG_compile_unit && m_tag != DW_TAG_partial_unit) { 773 SymbolFileDWARFDwo *dwo_symbol_file = cu->GetDwoSymbolFile(); 774 if (dwo_symbol_file) 775 return GetAttributes(dwo_symbol_file->GetCompileUnit(), 776 fixed_form_sizes, attributes, curr_depth); 777 } 778 779 dwarf2Data = cu->GetSymbolFileDWARF(); 780 abbrevDecl = GetAbbreviationDeclarationPtr(dwarf2Data, cu, offset); 781 } 782 783 if (abbrevDecl) { 784 const DWARFDataExtractor &debug_info_data = cu->GetData(); 785 786 if (fixed_form_sizes.Empty()) 787 fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize( 788 cu->GetAddressByteSize(), cu->IsDWARF64()); 789 790 const uint32_t num_attributes = abbrevDecl->NumAttributes(); 791 for (uint32_t i = 0; i < num_attributes; ++i) { 792 DWARFFormValue form_value(cu); 793 dw_attr_t attr; 794 abbrevDecl->GetAttrAndFormValueByIndex(i, attr, form_value); 795 const dw_form_t form = form_value.Form(); 796 797 // If we are tracking down DW_AT_specification or DW_AT_abstract_origin 798 // attributes, the depth will be non-zero. We need to omit certain 799 // attributes that don't make sense. 800 switch (attr) { 801 case DW_AT_sibling: 802 case DW_AT_declaration: 803 if (curr_depth > 0) { 804 // This attribute doesn't make sense when combined with the DIE that 805 // references this DIE. We know a DIE is referencing this DIE because 806 // curr_depth is not zero 807 break; 808 } 809 LLVM_FALLTHROUGH; 810 default: 811 attributes.Append(cu, offset, attr, form); 812 break; 813 } 814 815 if ((attr == DW_AT_specification) || (attr == DW_AT_abstract_origin)) { 816 if (form_value.ExtractValue(debug_info_data, &offset)) { 817 dw_offset_t die_offset = form_value.Reference(); 818 DWARFDIE spec_die = 819 const_cast<DWARFUnit *>(cu)->GetDIE(die_offset); 820 if (spec_die) 821 spec_die.GetAttributes(attributes, curr_depth + 1); 822 } 823 } else { 824 const uint8_t fixed_skip_size = fixed_form_sizes.GetSize(form); 825 if (fixed_skip_size) 826 offset += fixed_skip_size; 827 else 828 DWARFFormValue::SkipValue(form, debug_info_data, &offset, cu); 829 } 830 } 831 } else { 832 attributes.Clear(); 833 } 834 return attributes.Size(); 835 } 836 837 //---------------------------------------------------------------------- 838 // GetAttributeValue 839 // 840 // Get the value of an attribute and return the .debug_info offset of the 841 // attribute if it was properly extracted into form_value, or zero if we fail 842 // since an offset of zero is invalid for an attribute (it would be a compile 843 // unit header). 844 //---------------------------------------------------------------------- 845 dw_offset_t DWARFDebugInfoEntry::GetAttributeValue( 846 SymbolFileDWARF *dwarf2Data, const DWARFUnit *cu, 847 const dw_attr_t attr, DWARFFormValue &form_value, 848 dw_offset_t *end_attr_offset_ptr, 849 bool check_specification_or_abstract_origin) const { 850 SymbolFileDWARFDwo *dwo_symbol_file = cu->GetDwoSymbolFile(); 851 if (dwo_symbol_file && m_tag != DW_TAG_compile_unit && 852 m_tag != DW_TAG_partial_unit) 853 return GetAttributeValue(dwo_symbol_file, dwo_symbol_file->GetCompileUnit(), 854 attr, form_value, end_attr_offset_ptr, 855 check_specification_or_abstract_origin); 856 857 lldb::offset_t offset; 858 const DWARFAbbreviationDeclaration *abbrevDecl = 859 GetAbbreviationDeclarationPtr(dwarf2Data, cu, offset); 860 861 if (abbrevDecl) { 862 uint32_t attr_idx = abbrevDecl->FindAttributeIndex(attr); 863 864 if (attr_idx != DW_INVALID_INDEX) { 865 const DWARFDataExtractor &debug_info_data = cu->GetData(); 866 867 uint32_t idx = 0; 868 while (idx < attr_idx) 869 DWARFFormValue::SkipValue(abbrevDecl->GetFormByIndex(idx++), 870 debug_info_data, &offset, cu); 871 872 const dw_offset_t attr_offset = offset; 873 form_value.SetCompileUnit(cu); 874 form_value.SetForm(abbrevDecl->GetFormByIndex(idx)); 875 if (form_value.ExtractValue(debug_info_data, &offset)) { 876 if (end_attr_offset_ptr) 877 *end_attr_offset_ptr = offset; 878 return attr_offset; 879 } 880 } 881 } 882 883 if (check_specification_or_abstract_origin) { 884 if (GetAttributeValue(dwarf2Data, cu, DW_AT_specification, form_value)) { 885 DWARFDIE die = 886 const_cast<DWARFUnit *>(cu)->GetDIE(form_value.Reference()); 887 if (die) { 888 dw_offset_t die_offset = die.GetDIE()->GetAttributeValue( 889 die.GetDWARF(), die.GetCU(), attr, form_value, end_attr_offset_ptr, 890 false); 891 if (die_offset) 892 return die_offset; 893 } 894 } 895 896 if (GetAttributeValue(dwarf2Data, cu, DW_AT_abstract_origin, form_value)) { 897 DWARFDIE die = 898 const_cast<DWARFUnit *>(cu)->GetDIE(form_value.Reference()); 899 if (die) { 900 dw_offset_t die_offset = die.GetDIE()->GetAttributeValue( 901 die.GetDWARF(), die.GetCU(), attr, form_value, end_attr_offset_ptr, 902 false); 903 if (die_offset) 904 return die_offset; 905 } 906 } 907 } 908 909 if (!dwo_symbol_file) 910 return 0; 911 912 DWARFUnit *dwo_cu = dwo_symbol_file->GetCompileUnit(); 913 if (!dwo_cu) 914 return 0; 915 916 DWARFBaseDIE dwo_cu_die = dwo_cu->GetUnitDIEOnly(); 917 if (!dwo_cu_die.IsValid()) 918 return 0; 919 920 return dwo_cu_die.GetDIE()->GetAttributeValue( 921 dwo_symbol_file, dwo_cu, attr, form_value, end_attr_offset_ptr, 922 check_specification_or_abstract_origin); 923 } 924 925 //---------------------------------------------------------------------- 926 // GetAttributeValueAsString 927 // 928 // Get the value of an attribute as a string return it. The resulting pointer 929 // to the string data exists within the supplied SymbolFileDWARF and will only 930 // be available as long as the SymbolFileDWARF is still around and it's content 931 // doesn't change. 932 //---------------------------------------------------------------------- 933 const char *DWARFDebugInfoEntry::GetAttributeValueAsString( 934 SymbolFileDWARF *dwarf2Data, const DWARFUnit *cu, 935 const dw_attr_t attr, const char *fail_value, 936 bool check_specification_or_abstract_origin) const { 937 DWARFFormValue form_value; 938 if (GetAttributeValue(dwarf2Data, cu, attr, form_value, nullptr, 939 check_specification_or_abstract_origin)) 940 return form_value.AsCString(); 941 return fail_value; 942 } 943 944 //---------------------------------------------------------------------- 945 // GetAttributeValueAsUnsigned 946 // 947 // Get the value of an attribute as unsigned and return it. 948 //---------------------------------------------------------------------- 949 uint64_t DWARFDebugInfoEntry::GetAttributeValueAsUnsigned( 950 SymbolFileDWARF *dwarf2Data, const DWARFUnit *cu, 951 const dw_attr_t attr, uint64_t fail_value, 952 bool check_specification_or_abstract_origin) const { 953 DWARFFormValue form_value; 954 if (GetAttributeValue(dwarf2Data, cu, attr, form_value, nullptr, 955 check_specification_or_abstract_origin)) 956 return form_value.Unsigned(); 957 return fail_value; 958 } 959 960 //---------------------------------------------------------------------- 961 // GetAttributeValueAsSigned 962 // 963 // Get the value of an attribute a signed value and return it. 964 //---------------------------------------------------------------------- 965 int64_t DWARFDebugInfoEntry::GetAttributeValueAsSigned( 966 SymbolFileDWARF *dwarf2Data, const DWARFUnit *cu, 967 const dw_attr_t attr, int64_t fail_value, 968 bool check_specification_or_abstract_origin) const { 969 DWARFFormValue form_value; 970 if (GetAttributeValue(dwarf2Data, cu, attr, form_value, nullptr, 971 check_specification_or_abstract_origin)) 972 return form_value.Signed(); 973 return fail_value; 974 } 975 976 //---------------------------------------------------------------------- 977 // GetAttributeValueAsReference 978 // 979 // Get the value of an attribute as reference and fix up and compile unit 980 // relative offsets as needed. 981 //---------------------------------------------------------------------- 982 uint64_t DWARFDebugInfoEntry::GetAttributeValueAsReference( 983 SymbolFileDWARF *dwarf2Data, const DWARFUnit *cu, 984 const dw_attr_t attr, uint64_t fail_value, 985 bool check_specification_or_abstract_origin) const { 986 DWARFFormValue form_value; 987 if (GetAttributeValue(dwarf2Data, cu, attr, form_value, nullptr, 988 check_specification_or_abstract_origin)) 989 return form_value.Reference(); 990 return fail_value; 991 } 992 993 uint64_t DWARFDebugInfoEntry::GetAttributeValueAsAddress( 994 SymbolFileDWARF *dwarf2Data, const DWARFUnit *cu, 995 const dw_attr_t attr, uint64_t fail_value, 996 bool check_specification_or_abstract_origin) const { 997 DWARFFormValue form_value; 998 if (GetAttributeValue(dwarf2Data, cu, attr, form_value, nullptr, 999 check_specification_or_abstract_origin)) 1000 return form_value.Address(); 1001 return fail_value; 1002 } 1003 1004 //---------------------------------------------------------------------- 1005 // GetAttributeHighPC 1006 // 1007 // Get the hi_pc, adding hi_pc to lo_pc when specified as an <offset-from-low- 1008 // pc>. 1009 // 1010 // Returns the hi_pc or fail_value. 1011 //---------------------------------------------------------------------- 1012 dw_addr_t DWARFDebugInfoEntry::GetAttributeHighPC( 1013 SymbolFileDWARF *dwarf2Data, const DWARFUnit *cu, dw_addr_t lo_pc, 1014 uint64_t fail_value, bool check_specification_or_abstract_origin) const { 1015 DWARFFormValue form_value; 1016 if (GetAttributeValue(dwarf2Data, cu, DW_AT_high_pc, form_value, nullptr, 1017 check_specification_or_abstract_origin)) { 1018 dw_form_t form = form_value.Form(); 1019 if (form == DW_FORM_addr || form == DW_FORM_GNU_addr_index) 1020 return form_value.Address(); 1021 1022 // DWARF4 can specify the hi_pc as an <offset-from-lowpc> 1023 return lo_pc + form_value.Unsigned(); 1024 } 1025 return fail_value; 1026 } 1027 1028 //---------------------------------------------------------------------- 1029 // GetAttributeAddressRange 1030 // 1031 // Get the lo_pc and hi_pc, adding hi_pc to lo_pc when specified as an <offset- 1032 // from-low-pc>. 1033 // 1034 // Returns true or sets lo_pc and hi_pc to fail_value. 1035 //---------------------------------------------------------------------- 1036 bool DWARFDebugInfoEntry::GetAttributeAddressRange( 1037 SymbolFileDWARF *dwarf2Data, const DWARFUnit *cu, dw_addr_t &lo_pc, 1038 dw_addr_t &hi_pc, uint64_t fail_value, 1039 bool check_specification_or_abstract_origin) const { 1040 lo_pc = GetAttributeValueAsAddress(dwarf2Data, cu, DW_AT_low_pc, fail_value, 1041 check_specification_or_abstract_origin); 1042 if (lo_pc != fail_value) { 1043 hi_pc = GetAttributeHighPC(dwarf2Data, cu, lo_pc, fail_value, 1044 check_specification_or_abstract_origin); 1045 if (hi_pc != fail_value) 1046 return true; 1047 } 1048 lo_pc = fail_value; 1049 hi_pc = fail_value; 1050 return false; 1051 } 1052 1053 size_t DWARFDebugInfoEntry::GetAttributeAddressRanges( 1054 SymbolFileDWARF *dwarf2Data, const DWARFUnit *cu, 1055 DWARFRangeList &ranges, bool check_hi_lo_pc, 1056 bool check_specification_or_abstract_origin) const { 1057 ranges.Clear(); 1058 1059 dw_offset_t debug_ranges_offset = GetAttributeValueAsUnsigned( 1060 dwarf2Data, cu, DW_AT_ranges, DW_INVALID_OFFSET, 1061 check_specification_or_abstract_origin); 1062 if (debug_ranges_offset != DW_INVALID_OFFSET) { 1063 if (DWARFDebugRangesBase *debug_ranges = dwarf2Data->DebugRanges()) 1064 debug_ranges->FindRanges(cu, debug_ranges_offset, ranges); 1065 } else if (check_hi_lo_pc) { 1066 dw_addr_t lo_pc = LLDB_INVALID_ADDRESS; 1067 dw_addr_t hi_pc = LLDB_INVALID_ADDRESS; 1068 if (GetAttributeAddressRange(dwarf2Data, cu, lo_pc, hi_pc, 1069 LLDB_INVALID_ADDRESS, 1070 check_specification_or_abstract_origin)) { 1071 if (lo_pc < hi_pc) 1072 ranges.Append(DWARFRangeList::Entry(lo_pc, hi_pc - lo_pc)); 1073 } 1074 } 1075 return ranges.GetSize(); 1076 } 1077 1078 //---------------------------------------------------------------------- 1079 // GetName 1080 // 1081 // Get value of the DW_AT_name attribute and return it if one exists, else 1082 // return NULL. 1083 //---------------------------------------------------------------------- 1084 const char *DWARFDebugInfoEntry::GetName(SymbolFileDWARF *dwarf2Data, 1085 const DWARFUnit *cu) const { 1086 return GetAttributeValueAsString(dwarf2Data, cu, DW_AT_name, nullptr, true); 1087 } 1088 1089 //---------------------------------------------------------------------- 1090 // GetMangledName 1091 // 1092 // Get value of the DW_AT_MIPS_linkage_name attribute and return it if one 1093 // exists, else return the value of the DW_AT_name attribute 1094 //---------------------------------------------------------------------- 1095 const char * 1096 DWARFDebugInfoEntry::GetMangledName(SymbolFileDWARF *dwarf2Data, 1097 const DWARFUnit *cu, 1098 bool substitute_name_allowed) const { 1099 const char *name = nullptr; 1100 1101 name = GetAttributeValueAsString(dwarf2Data, cu, DW_AT_MIPS_linkage_name, 1102 nullptr, true); 1103 if (name) 1104 return name; 1105 1106 name = GetAttributeValueAsString(dwarf2Data, cu, DW_AT_linkage_name, nullptr, 1107 true); 1108 if (name) 1109 return name; 1110 1111 if (!substitute_name_allowed) 1112 return nullptr; 1113 1114 name = GetAttributeValueAsString(dwarf2Data, cu, DW_AT_name, nullptr, true); 1115 return name; 1116 } 1117 1118 //---------------------------------------------------------------------- 1119 // GetPubname 1120 // 1121 // Get value the name for a DIE as it should appear for a .debug_pubnames or 1122 // .debug_pubtypes section. 1123 //---------------------------------------------------------------------- 1124 const char *DWARFDebugInfoEntry::GetPubname(SymbolFileDWARF *dwarf2Data, 1125 const DWARFUnit *cu) const { 1126 const char *name = nullptr; 1127 if (!dwarf2Data) 1128 return name; 1129 1130 name = GetAttributeValueAsString(dwarf2Data, cu, DW_AT_MIPS_linkage_name, 1131 nullptr, true); 1132 if (name) 1133 return name; 1134 1135 name = GetAttributeValueAsString(dwarf2Data, cu, DW_AT_linkage_name, nullptr, 1136 true); 1137 if (name) 1138 return name; 1139 1140 name = GetAttributeValueAsString(dwarf2Data, cu, DW_AT_name, nullptr, true); 1141 return name; 1142 } 1143 1144 //---------------------------------------------------------------------- 1145 // GetName 1146 // 1147 // Get value of the DW_AT_name attribute for a debug information entry that 1148 // exists at offset "die_offset" and place that value into the supplied stream 1149 // object. If the DIE is a NULL object "NULL" is placed into the stream, and if 1150 // no DW_AT_name attribute exists for the DIE then nothing is printed. 1151 //---------------------------------------------------------------------- 1152 bool DWARFDebugInfoEntry::GetName(SymbolFileDWARF *dwarf2Data, 1153 const DWARFUnit *cu, 1154 const dw_offset_t die_offset, Stream &s) { 1155 if (dwarf2Data == NULL) { 1156 s.PutCString("NULL"); 1157 return false; 1158 } 1159 1160 DWARFDebugInfoEntry die; 1161 lldb::offset_t offset = die_offset; 1162 if (die.Extract(dwarf2Data, cu, &offset)) { 1163 if (die.IsNULL()) { 1164 s.PutCString("NULL"); 1165 return true; 1166 } else { 1167 const char *name = die.GetAttributeValueAsString( 1168 dwarf2Data, cu, DW_AT_name, nullptr, true); 1169 if (name) { 1170 s.PutCString(name); 1171 return true; 1172 } 1173 } 1174 } 1175 return false; 1176 } 1177 1178 //---------------------------------------------------------------------- 1179 // AppendTypeName 1180 // 1181 // Follows the type name definition down through all needed tags to end up with 1182 // a fully qualified type name and dump the results to the supplied stream. 1183 // This is used to show the name of types given a type identifier. 1184 //---------------------------------------------------------------------- 1185 bool DWARFDebugInfoEntry::AppendTypeName(SymbolFileDWARF *dwarf2Data, 1186 const DWARFUnit *cu, 1187 const dw_offset_t die_offset, 1188 Stream &s) { 1189 if (dwarf2Data == NULL) { 1190 s.PutCString("NULL"); 1191 return false; 1192 } 1193 1194 DWARFDebugInfoEntry die; 1195 lldb::offset_t offset = die_offset; 1196 if (die.Extract(dwarf2Data, cu, &offset)) { 1197 if (die.IsNULL()) { 1198 s.PutCString("NULL"); 1199 return true; 1200 } else { 1201 const char *name = die.GetPubname(dwarf2Data, cu); 1202 if (name) 1203 s.PutCString(name); 1204 else { 1205 bool result = true; 1206 const DWARFAbbreviationDeclaration *abbrevDecl = 1207 die.GetAbbreviationDeclarationPtr(dwarf2Data, cu, offset); 1208 1209 if (abbrevDecl == NULL) 1210 return false; 1211 1212 switch (abbrevDecl->Tag()) { 1213 case DW_TAG_array_type: 1214 break; // print out a "[]" after printing the full type of the element 1215 // below 1216 case DW_TAG_base_type: 1217 s.PutCString("base "); 1218 break; 1219 case DW_TAG_class_type: 1220 s.PutCString("class "); 1221 break; 1222 case DW_TAG_const_type: 1223 s.PutCString("const "); 1224 break; 1225 case DW_TAG_enumeration_type: 1226 s.PutCString("enum "); 1227 break; 1228 case DW_TAG_file_type: 1229 s.PutCString("file "); 1230 break; 1231 case DW_TAG_interface_type: 1232 s.PutCString("interface "); 1233 break; 1234 case DW_TAG_packed_type: 1235 s.PutCString("packed "); 1236 break; 1237 case DW_TAG_pointer_type: 1238 break; // print out a '*' after printing the full type below 1239 case DW_TAG_ptr_to_member_type: 1240 break; // print out a '*' after printing the full type below 1241 case DW_TAG_reference_type: 1242 break; // print out a '&' after printing the full type below 1243 case DW_TAG_restrict_type: 1244 s.PutCString("restrict "); 1245 break; 1246 case DW_TAG_set_type: 1247 s.PutCString("set "); 1248 break; 1249 case DW_TAG_shared_type: 1250 s.PutCString("shared "); 1251 break; 1252 case DW_TAG_string_type: 1253 s.PutCString("string "); 1254 break; 1255 case DW_TAG_structure_type: 1256 s.PutCString("struct "); 1257 break; 1258 case DW_TAG_subrange_type: 1259 s.PutCString("subrange "); 1260 break; 1261 case DW_TAG_subroutine_type: 1262 s.PutCString("function "); 1263 break; 1264 case DW_TAG_thrown_type: 1265 s.PutCString("thrown "); 1266 break; 1267 case DW_TAG_union_type: 1268 s.PutCString("union "); 1269 break; 1270 case DW_TAG_unspecified_type: 1271 s.PutCString("unspecified "); 1272 break; 1273 case DW_TAG_volatile_type: 1274 s.PutCString("volatile "); 1275 break; 1276 default: 1277 return false; 1278 } 1279 1280 // Follow the DW_AT_type if possible 1281 DWARFFormValue form_value; 1282 if (die.GetAttributeValue(dwarf2Data, cu, DW_AT_type, form_value)) { 1283 uint64_t next_die_offset = form_value.Reference(); 1284 result = AppendTypeName(dwarf2Data, cu, next_die_offset, s); 1285 } 1286 1287 switch (abbrevDecl->Tag()) { 1288 case DW_TAG_array_type: 1289 s.PutCString("[]"); 1290 break; 1291 case DW_TAG_pointer_type: 1292 s.PutChar('*'); 1293 break; 1294 case DW_TAG_ptr_to_member_type: 1295 s.PutChar('*'); 1296 break; 1297 case DW_TAG_reference_type: 1298 s.PutChar('&'); 1299 break; 1300 default: 1301 break; 1302 } 1303 return result; 1304 } 1305 } 1306 } 1307 return false; 1308 } 1309 1310 //---------------------------------------------------------------------- 1311 // BuildAddressRangeTable 1312 //---------------------------------------------------------------------- 1313 void DWARFDebugInfoEntry::BuildAddressRangeTable( 1314 SymbolFileDWARF *dwarf2Data, const DWARFUnit *cu, 1315 DWARFDebugAranges *debug_aranges) const { 1316 if (m_tag) { 1317 if (m_tag == DW_TAG_subprogram) { 1318 dw_addr_t lo_pc = LLDB_INVALID_ADDRESS; 1319 dw_addr_t hi_pc = LLDB_INVALID_ADDRESS; 1320 if (GetAttributeAddressRange(dwarf2Data, cu, lo_pc, hi_pc, 1321 LLDB_INVALID_ADDRESS)) { 1322 /// printf("BuildAddressRangeTable() 0x%8.8x: %30s: [0x%8.8x - 1323 /// 0x%8.8x)\n", m_offset, DW_TAG_value_to_name(tag), lo_pc, hi_pc); 1324 debug_aranges->AppendRange(cu->GetOffset(), lo_pc, hi_pc); 1325 } 1326 } 1327 1328 const DWARFDebugInfoEntry *child = GetFirstChild(); 1329 while (child) { 1330 child->BuildAddressRangeTable(dwarf2Data, cu, debug_aranges); 1331 child = child->GetSibling(); 1332 } 1333 } 1334 } 1335 1336 //---------------------------------------------------------------------- 1337 // BuildFunctionAddressRangeTable 1338 // 1339 // This function is very similar to the BuildAddressRangeTable function except 1340 // that the actual DIE offset for the function is placed in the table instead 1341 // of the compile unit offset (which is the way the standard .debug_aranges 1342 // section does it). 1343 //---------------------------------------------------------------------- 1344 void DWARFDebugInfoEntry::BuildFunctionAddressRangeTable( 1345 SymbolFileDWARF *dwarf2Data, const DWARFUnit *cu, 1346 DWARFDebugAranges *debug_aranges) const { 1347 if (m_tag) { 1348 if (m_tag == DW_TAG_subprogram) { 1349 dw_addr_t lo_pc = LLDB_INVALID_ADDRESS; 1350 dw_addr_t hi_pc = LLDB_INVALID_ADDRESS; 1351 if (GetAttributeAddressRange(dwarf2Data, cu, lo_pc, hi_pc, 1352 LLDB_INVALID_ADDRESS)) { 1353 // printf("BuildAddressRangeTable() 0x%8.8x: [0x%16.16" PRIx64 " - 1354 // 0x%16.16" PRIx64 ")\n", m_offset, lo_pc, hi_pc); // DEBUG ONLY 1355 debug_aranges->AppendRange(GetOffset(), lo_pc, hi_pc); 1356 } 1357 } 1358 1359 const DWARFDebugInfoEntry *child = GetFirstChild(); 1360 while (child) { 1361 child->BuildFunctionAddressRangeTable(dwarf2Data, cu, debug_aranges); 1362 child = child->GetSibling(); 1363 } 1364 } 1365 } 1366 1367 void DWARFDebugInfoEntry::GetDeclContextDIEs( 1368 DWARFUnit *cu, DWARFDIECollection &decl_context_dies) const { 1369 1370 DWARFDIE die(cu, const_cast<DWARFDebugInfoEntry *>(this)); 1371 die.GetDeclContextDIEs(decl_context_dies); 1372 } 1373 1374 void DWARFDebugInfoEntry::GetDWARFDeclContext( 1375 SymbolFileDWARF *dwarf2Data, DWARFUnit *cu, 1376 DWARFDeclContext &dwarf_decl_ctx) const { 1377 const dw_tag_t tag = Tag(); 1378 if (tag != DW_TAG_compile_unit && tag != DW_TAG_partial_unit) { 1379 dwarf_decl_ctx.AppendDeclContext(tag, GetName(dwarf2Data, cu)); 1380 DWARFDIE parent_decl_ctx_die = GetParentDeclContextDIE(dwarf2Data, cu); 1381 if (parent_decl_ctx_die && parent_decl_ctx_die.GetDIE() != this) { 1382 if (parent_decl_ctx_die.Tag() != DW_TAG_compile_unit && 1383 parent_decl_ctx_die.Tag() != DW_TAG_partial_unit) 1384 parent_decl_ctx_die.GetDIE()->GetDWARFDeclContext( 1385 parent_decl_ctx_die.GetDWARF(), parent_decl_ctx_die.GetCU(), 1386 dwarf_decl_ctx); 1387 } 1388 } 1389 } 1390 1391 bool DWARFDebugInfoEntry::MatchesDWARFDeclContext( 1392 SymbolFileDWARF *dwarf2Data, DWARFUnit *cu, 1393 const DWARFDeclContext &dwarf_decl_ctx) const { 1394 1395 DWARFDeclContext this_dwarf_decl_ctx; 1396 GetDWARFDeclContext(dwarf2Data, cu, this_dwarf_decl_ctx); 1397 return this_dwarf_decl_ctx == dwarf_decl_ctx; 1398 } 1399 1400 DWARFDIE 1401 DWARFDebugInfoEntry::GetParentDeclContextDIE(SymbolFileDWARF *dwarf2Data, 1402 DWARFUnit *cu) const { 1403 DWARFAttributes attributes; 1404 GetAttributes(cu, DWARFFormValue::FixedFormSizes(), attributes); 1405 return GetParentDeclContextDIE(dwarf2Data, cu, attributes); 1406 } 1407 1408 DWARFDIE 1409 DWARFDebugInfoEntry::GetParentDeclContextDIE( 1410 SymbolFileDWARF *dwarf2Data, DWARFUnit *cu, 1411 const DWARFAttributes &attributes) const { 1412 DWARFDIE die(cu, const_cast<DWARFDebugInfoEntry *>(this)); 1413 1414 while (die) { 1415 // If this is the original DIE that we are searching for a declaration for, 1416 // then don't look in the cache as we don't want our own decl context to be 1417 // our decl context... 1418 if (die.GetDIE() != this) { 1419 switch (die.Tag()) { 1420 case DW_TAG_compile_unit: 1421 case DW_TAG_partial_unit: 1422 case DW_TAG_namespace: 1423 case DW_TAG_structure_type: 1424 case DW_TAG_union_type: 1425 case DW_TAG_class_type: 1426 return die; 1427 1428 default: 1429 break; 1430 } 1431 } 1432 1433 dw_offset_t die_offset; 1434 1435 die_offset = 1436 attributes.FormValueAsUnsigned(DW_AT_specification, DW_INVALID_OFFSET); 1437 if (die_offset != DW_INVALID_OFFSET) { 1438 DWARFDIE spec_die = cu->GetDIE(die_offset); 1439 if (spec_die) { 1440 DWARFDIE decl_ctx_die = spec_die.GetParentDeclContextDIE(); 1441 if (decl_ctx_die) 1442 return decl_ctx_die; 1443 } 1444 } 1445 1446 die_offset = attributes.FormValueAsUnsigned(DW_AT_abstract_origin, 1447 DW_INVALID_OFFSET); 1448 if (die_offset != DW_INVALID_OFFSET) { 1449 DWARFDIE abs_die = cu->GetDIE(die_offset); 1450 if (abs_die) { 1451 DWARFDIE decl_ctx_die = abs_die.GetParentDeclContextDIE(); 1452 if (decl_ctx_die) 1453 return decl_ctx_die; 1454 } 1455 } 1456 1457 die = die.GetParent(); 1458 } 1459 return DWARFDIE(); 1460 } 1461 1462 const char *DWARFDebugInfoEntry::GetQualifiedName(SymbolFileDWARF *dwarf2Data, 1463 DWARFUnit *cu, 1464 std::string &storage) const { 1465 DWARFAttributes attributes; 1466 GetAttributes(cu, DWARFFormValue::FixedFormSizes(), attributes); 1467 return GetQualifiedName(dwarf2Data, cu, attributes, storage); 1468 } 1469 1470 const char *DWARFDebugInfoEntry::GetQualifiedName( 1471 SymbolFileDWARF *dwarf2Data, DWARFUnit *cu, 1472 const DWARFAttributes &attributes, std::string &storage) const { 1473 1474 const char *name = GetName(dwarf2Data, cu); 1475 1476 if (name) { 1477 DWARFDIE parent_decl_ctx_die = GetParentDeclContextDIE(dwarf2Data, cu); 1478 storage.clear(); 1479 // TODO: change this to get the correct decl context parent.... 1480 while (parent_decl_ctx_die) { 1481 const dw_tag_t parent_tag = parent_decl_ctx_die.Tag(); 1482 switch (parent_tag) { 1483 case DW_TAG_namespace: { 1484 const char *namespace_name = parent_decl_ctx_die.GetName(); 1485 if (namespace_name) { 1486 storage.insert(0, "::"); 1487 storage.insert(0, namespace_name); 1488 } else { 1489 storage.insert(0, "(anonymous namespace)::"); 1490 } 1491 parent_decl_ctx_die = parent_decl_ctx_die.GetParentDeclContextDIE(); 1492 } break; 1493 1494 case DW_TAG_class_type: 1495 case DW_TAG_structure_type: 1496 case DW_TAG_union_type: { 1497 const char *class_union_struct_name = parent_decl_ctx_die.GetName(); 1498 1499 if (class_union_struct_name) { 1500 storage.insert(0, "::"); 1501 storage.insert(0, class_union_struct_name); 1502 } 1503 parent_decl_ctx_die = parent_decl_ctx_die.GetParentDeclContextDIE(); 1504 } break; 1505 1506 default: 1507 parent_decl_ctx_die.Clear(); 1508 break; 1509 } 1510 } 1511 1512 if (storage.empty()) 1513 storage.append("::"); 1514 1515 storage.append(name); 1516 } 1517 if (storage.empty()) 1518 return NULL; 1519 return storage.c_str(); 1520 } 1521 1522 //---------------------------------------------------------------------- 1523 // LookupAddress 1524 //---------------------------------------------------------------------- 1525 bool DWARFDebugInfoEntry::LookupAddress(const dw_addr_t address, 1526 SymbolFileDWARF *dwarf2Data, 1527 const DWARFUnit *cu, 1528 DWARFDebugInfoEntry **function_die, 1529 DWARFDebugInfoEntry **block_die) { 1530 bool found_address = false; 1531 if (m_tag) { 1532 bool check_children = false; 1533 bool match_addr_range = false; 1534 // printf("0x%8.8x: %30s: address = 0x%8.8x - ", m_offset, 1535 // DW_TAG_value_to_name(tag), address); 1536 switch (m_tag) { 1537 case DW_TAG_array_type: 1538 break; 1539 case DW_TAG_class_type: 1540 check_children = true; 1541 break; 1542 case DW_TAG_entry_point: 1543 break; 1544 case DW_TAG_enumeration_type: 1545 break; 1546 case DW_TAG_formal_parameter: 1547 break; 1548 case DW_TAG_imported_declaration: 1549 break; 1550 case DW_TAG_label: 1551 break; 1552 case DW_TAG_lexical_block: 1553 check_children = true; 1554 match_addr_range = true; 1555 break; 1556 case DW_TAG_member: 1557 break; 1558 case DW_TAG_pointer_type: 1559 break; 1560 case DW_TAG_reference_type: 1561 break; 1562 case DW_TAG_compile_unit: 1563 match_addr_range = true; 1564 break; 1565 case DW_TAG_string_type: 1566 break; 1567 case DW_TAG_structure_type: 1568 check_children = true; 1569 break; 1570 case DW_TAG_subroutine_type: 1571 break; 1572 case DW_TAG_typedef: 1573 break; 1574 case DW_TAG_union_type: 1575 break; 1576 case DW_TAG_unspecified_parameters: 1577 break; 1578 case DW_TAG_variant: 1579 break; 1580 case DW_TAG_common_block: 1581 check_children = true; 1582 break; 1583 case DW_TAG_common_inclusion: 1584 break; 1585 case DW_TAG_inheritance: 1586 break; 1587 case DW_TAG_inlined_subroutine: 1588 check_children = true; 1589 match_addr_range = true; 1590 break; 1591 case DW_TAG_module: 1592 match_addr_range = true; 1593 break; 1594 case DW_TAG_ptr_to_member_type: 1595 break; 1596 case DW_TAG_set_type: 1597 break; 1598 case DW_TAG_subrange_type: 1599 break; 1600 case DW_TAG_with_stmt: 1601 break; 1602 case DW_TAG_access_declaration: 1603 break; 1604 case DW_TAG_base_type: 1605 break; 1606 case DW_TAG_catch_block: 1607 match_addr_range = true; 1608 break; 1609 case DW_TAG_const_type: 1610 break; 1611 case DW_TAG_constant: 1612 break; 1613 case DW_TAG_enumerator: 1614 break; 1615 case DW_TAG_file_type: 1616 break; 1617 case DW_TAG_friend: 1618 break; 1619 case DW_TAG_namelist: 1620 break; 1621 case DW_TAG_namelist_item: 1622 break; 1623 case DW_TAG_packed_type: 1624 break; 1625 case DW_TAG_subprogram: 1626 match_addr_range = true; 1627 break; 1628 case DW_TAG_template_type_parameter: 1629 break; 1630 case DW_TAG_template_value_parameter: 1631 break; 1632 case DW_TAG_GNU_template_parameter_pack: 1633 break; 1634 case DW_TAG_thrown_type: 1635 break; 1636 case DW_TAG_try_block: 1637 match_addr_range = true; 1638 break; 1639 case DW_TAG_variant_part: 1640 break; 1641 case DW_TAG_variable: 1642 break; 1643 case DW_TAG_volatile_type: 1644 break; 1645 case DW_TAG_dwarf_procedure: 1646 break; 1647 case DW_TAG_restrict_type: 1648 break; 1649 case DW_TAG_interface_type: 1650 break; 1651 case DW_TAG_namespace: 1652 check_children = true; 1653 break; 1654 case DW_TAG_imported_module: 1655 break; 1656 case DW_TAG_unspecified_type: 1657 break; 1658 case DW_TAG_partial_unit: 1659 match_addr_range = true; 1660 break; 1661 case DW_TAG_imported_unit: 1662 break; 1663 case DW_TAG_shared_type: 1664 break; 1665 default: 1666 break; 1667 } 1668 1669 if (match_addr_range) { 1670 dw_addr_t lo_pc = GetAttributeValueAsAddress(dwarf2Data, cu, DW_AT_low_pc, 1671 LLDB_INVALID_ADDRESS); 1672 if (lo_pc != LLDB_INVALID_ADDRESS) { 1673 dw_addr_t hi_pc = 1674 GetAttributeHighPC(dwarf2Data, cu, lo_pc, LLDB_INVALID_ADDRESS); 1675 if (hi_pc != LLDB_INVALID_ADDRESS) { 1676 // printf("\n0x%8.8x: %30s: address = 0x%8.8x [0x%8.8x - 0x%8.8x) ", 1677 // m_offset, DW_TAG_value_to_name(tag), address, lo_pc, hi_pc); 1678 if ((lo_pc <= address) && (address < hi_pc)) { 1679 found_address = true; 1680 // puts("***MATCH***"); 1681 switch (m_tag) { 1682 case DW_TAG_compile_unit: // File 1683 case DW_TAG_partial_unit: // File 1684 check_children = ((function_die != NULL) || (block_die != NULL)); 1685 break; 1686 1687 case DW_TAG_subprogram: // Function 1688 if (function_die) 1689 *function_die = this; 1690 check_children = (block_die != NULL); 1691 break; 1692 1693 case DW_TAG_inlined_subroutine: // Inlined Function 1694 case DW_TAG_lexical_block: // Block { } in code 1695 if (block_die) { 1696 *block_die = this; 1697 check_children = true; 1698 } 1699 break; 1700 1701 default: 1702 check_children = true; 1703 break; 1704 } 1705 } 1706 } else { 1707 // Compile units may not have a valid high/low pc when there 1708 // are address gaps in subroutines so we must always search 1709 // if there is no valid high and low PC. 1710 check_children = (m_tag == DW_TAG_compile_unit || 1711 m_tag == DW_TAG_partial_unit) && 1712 ((function_die != NULL) || (block_die != NULL)); 1713 } 1714 } else { 1715 dw_offset_t debug_ranges_offset = GetAttributeValueAsUnsigned( 1716 dwarf2Data, cu, DW_AT_ranges, DW_INVALID_OFFSET); 1717 if (debug_ranges_offset != DW_INVALID_OFFSET) { 1718 DWARFRangeList ranges; 1719 DWARFDebugRangesBase *debug_ranges = dwarf2Data->DebugRanges(); 1720 debug_ranges->FindRanges(cu, debug_ranges_offset, ranges); 1721 1722 if (ranges.FindEntryThatContains(address)) { 1723 found_address = true; 1724 // puts("***MATCH***"); 1725 switch (m_tag) { 1726 case DW_TAG_compile_unit: // File 1727 case DW_TAG_partial_unit: // File 1728 check_children = ((function_die != NULL) || (block_die != NULL)); 1729 break; 1730 1731 case DW_TAG_subprogram: // Function 1732 if (function_die) 1733 *function_die = this; 1734 check_children = (block_die != NULL); 1735 break; 1736 1737 case DW_TAG_inlined_subroutine: // Inlined Function 1738 case DW_TAG_lexical_block: // Block { } in code 1739 if (block_die) { 1740 *block_die = this; 1741 check_children = true; 1742 } 1743 break; 1744 1745 default: 1746 check_children = true; 1747 break; 1748 } 1749 } else { 1750 check_children = false; 1751 } 1752 } 1753 } 1754 } 1755 1756 if (check_children) { 1757 // printf("checking children\n"); 1758 DWARFDebugInfoEntry *child = GetFirstChild(); 1759 while (child) { 1760 if (child->LookupAddress(address, dwarf2Data, cu, function_die, 1761 block_die)) 1762 return true; 1763 child = child->GetSibling(); 1764 } 1765 } 1766 } 1767 return found_address; 1768 } 1769 1770 const DWARFAbbreviationDeclaration * 1771 DWARFDebugInfoEntry::GetAbbreviationDeclarationPtr( 1772 SymbolFileDWARF *dwarf2Data, const DWARFUnit *cu, 1773 lldb::offset_t &offset) const { 1774 if (dwarf2Data) { 1775 offset = GetOffset(); 1776 1777 const DWARFAbbreviationDeclarationSet *abbrev_set = cu->GetAbbreviations(); 1778 if (abbrev_set) { 1779 const DWARFAbbreviationDeclaration *abbrev_decl = 1780 abbrev_set->GetAbbreviationDeclaration(m_abbr_idx); 1781 if (abbrev_decl) { 1782 // Make sure the abbreviation code still matches. If it doesn't and the 1783 // DWARF data was mmap'ed, the backing file might have been modified 1784 // which is bad news. 1785 const uint64_t abbrev_code = cu->GetData().GetULEB128(&offset); 1786 1787 if (abbrev_decl->Code() == abbrev_code) 1788 return abbrev_decl; 1789 1790 dwarf2Data->GetObjectFile()->GetModule()->ReportErrorIfModifyDetected( 1791 "0x%8.8x: the DWARF debug information has been modified (abbrev " 1792 "code was %u, and is now %u)", 1793 GetOffset(), (uint32_t)abbrev_decl->Code(), (uint32_t)abbrev_code); 1794 } 1795 } 1796 } 1797 offset = DW_INVALID_OFFSET; 1798 return NULL; 1799 } 1800 1801 bool DWARFDebugInfoEntry::OffsetLessThan(const DWARFDebugInfoEntry &a, 1802 const DWARFDebugInfoEntry &b) { 1803 return a.GetOffset() < b.GetOffset(); 1804 } 1805 1806 void DWARFDebugInfoEntry::DumpDIECollection( 1807 Stream &strm, DWARFDebugInfoEntry::collection &die_collection) { 1808 DWARFDebugInfoEntry::const_iterator pos; 1809 DWARFDebugInfoEntry::const_iterator end = die_collection.end(); 1810 strm.PutCString("\noffset parent sibling child\n"); 1811 strm.PutCString("-------- -------- -------- --------\n"); 1812 for (pos = die_collection.begin(); pos != end; ++pos) { 1813 const DWARFDebugInfoEntry &die_ref = *pos; 1814 const DWARFDebugInfoEntry *p = die_ref.GetParent(); 1815 const DWARFDebugInfoEntry *s = die_ref.GetSibling(); 1816 const DWARFDebugInfoEntry *c = die_ref.GetFirstChild(); 1817 strm.Printf("%.8x: %.8x %.8x %.8x 0x%4.4x %s%s\n", die_ref.GetOffset(), 1818 p ? p->GetOffset() : 0, s ? s->GetOffset() : 0, 1819 c ? c->GetOffset() : 0, die_ref.Tag(), 1820 DW_TAG_value_to_name(die_ref.Tag()), 1821 die_ref.HasChildren() ? " *" : ""); 1822 } 1823 } 1824 1825 bool DWARFDebugInfoEntry::operator==(const DWARFDebugInfoEntry &rhs) const { 1826 return m_offset == rhs.m_offset && m_parent_idx == rhs.m_parent_idx && 1827 m_sibling_idx == rhs.m_sibling_idx && 1828 m_abbr_idx == rhs.m_abbr_idx && m_has_children == rhs.m_has_children && 1829 m_tag == rhs.m_tag; 1830 } 1831 1832 bool DWARFDebugInfoEntry::operator!=(const DWARFDebugInfoEntry &rhs) const { 1833 return !(*this == rhs); 1834 } 1835