DWARFDebugInfoEntry.cpp revision 327952
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 "DWARFCompileUnit.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 32using namespace lldb_private; 33using namespace std; 34extern int g_verbose; 35 36bool DWARFDebugInfoEntry::FastExtract( 37 const DWARFDataExtractor &debug_info_data, const DWARFCompileUnit *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 m_empty_children = false; 44 const uint64_t abbr_idx = debug_info_data.GetULEB128(offset_ptr); 45 assert(abbr_idx < (1 << DIE_ABBR_IDX_BITSIZE)); 46 m_abbr_idx = abbr_idx; 47 48 // assert (fixed_form_sizes); // For best performance this should be 49 // specified! 50 51 if (m_abbr_idx) { 52 lldb::offset_t offset = *offset_ptr; 53 54 const DWARFAbbreviationDeclaration *abbrevDecl = 55 cu->GetAbbreviations()->GetAbbreviationDeclaration(m_abbr_idx); 56 57 if (abbrevDecl == NULL) { 58 cu->GetSymbolFileDWARF()->GetObjectFile()->GetModule()->ReportError( 59 "{0x%8.8x}: invalid abbreviation code %u, please file a bug and " 60 "attach the file at the start of this error message", 61 m_offset, (unsigned)abbr_idx); 62 // WE can't parse anymore if the DWARF is borked... 63 *offset_ptr = UINT32_MAX; 64 return false; 65 } 66 m_tag = abbrevDecl->Tag(); 67 m_has_children = abbrevDecl->HasChildren(); 68 // Skip all data in the .debug_info for the attributes 69 const uint32_t numAttributes = abbrevDecl->NumAttributes(); 70 uint32_t i; 71 dw_form_t form; 72 for (i = 0; i < numAttributes; ++i) { 73 form = abbrevDecl->GetFormByIndexUnchecked(i); 74 75 const uint8_t fixed_skip_size = fixed_form_sizes.GetSize(form); 76 if (fixed_skip_size) 77 offset += fixed_skip_size; 78 else { 79 bool form_is_indirect = false; 80 do { 81 form_is_indirect = false; 82 uint32_t form_size = 0; 83 switch (form) { 84 // Blocks if inlined data that have a length field and the data bytes 85 // inlined in the .debug_info 86 case DW_FORM_exprloc: 87 case DW_FORM_block: 88 form_size = debug_info_data.GetULEB128(&offset); 89 break; 90 case DW_FORM_block1: 91 form_size = debug_info_data.GetU8_unchecked(&offset); 92 break; 93 case DW_FORM_block2: 94 form_size = debug_info_data.GetU16_unchecked(&offset); 95 break; 96 case DW_FORM_block4: 97 form_size = debug_info_data.GetU32_unchecked(&offset); 98 break; 99 100 // Inlined NULL terminated C-strings 101 case DW_FORM_string: 102 debug_info_data.GetCStr(&offset); 103 break; 104 105 // Compile unit address sized values 106 case DW_FORM_addr: 107 form_size = cu->GetAddressByteSize(); 108 break; 109 case DW_FORM_ref_addr: 110 if (cu->GetVersion() <= 2) 111 form_size = cu->GetAddressByteSize(); 112 else 113 form_size = cu->IsDWARF64() ? 8 : 4; 114 break; 115 116 // 0 sized form 117 case DW_FORM_flag_present: 118 form_size = 0; 119 break; 120 121 // 1 byte values 122 case DW_FORM_data1: 123 case DW_FORM_flag: 124 case DW_FORM_ref1: 125 form_size = 1; 126 break; 127 128 // 2 byte values 129 case DW_FORM_data2: 130 case DW_FORM_ref2: 131 form_size = 2; 132 break; 133 134 // 4 byte values 135 case DW_FORM_data4: 136 case DW_FORM_ref4: 137 form_size = 4; 138 break; 139 140 // 8 byte values 141 case DW_FORM_data8: 142 case DW_FORM_ref8: 143 case DW_FORM_ref_sig8: 144 form_size = 8; 145 break; 146 147 // signed or unsigned LEB 128 values 148 case DW_FORM_sdata: 149 case DW_FORM_udata: 150 case DW_FORM_ref_udata: 151 case DW_FORM_GNU_addr_index: 152 case DW_FORM_GNU_str_index: 153 debug_info_data.Skip_LEB128(&offset); 154 break; 155 156 case DW_FORM_indirect: 157 form_is_indirect = true; 158 form = debug_info_data.GetULEB128(&offset); 159 break; 160 161 case DW_FORM_strp: 162 case DW_FORM_sec_offset: 163 if (cu->IsDWARF64()) 164 debug_info_data.GetU64(&offset); 165 else 166 debug_info_data.GetU32(&offset); 167 break; 168 169 default: 170 *offset_ptr = m_offset; 171 return false; 172 } 173 offset += form_size; 174 175 } while (form_is_indirect); 176 } 177 } 178 *offset_ptr = offset; 179 return true; 180 } else { 181 m_tag = 0; 182 m_has_children = false; 183 return true; // NULL debug tag entry 184 } 185 186 return false; 187} 188 189//---------------------------------------------------------------------- 190// Extract 191// 192// Extract a debug info entry for a given compile unit from the 193// .debug_info and .debug_abbrev data within the SymbolFileDWARF class 194// starting at the given offset 195//---------------------------------------------------------------------- 196bool DWARFDebugInfoEntry::Extract(SymbolFileDWARF *dwarf2Data, 197 const DWARFCompileUnit *cu, 198 lldb::offset_t *offset_ptr) { 199 const DWARFDataExtractor &debug_info_data = dwarf2Data->get_debug_info_data(); 200 // const DWARFDataExtractor& debug_str_data = 201 // dwarf2Data->get_debug_str_data(); 202 const uint32_t cu_end_offset = cu->GetNextCompileUnitOffset(); 203 lldb::offset_t offset = *offset_ptr; 204 // if (offset >= cu_end_offset) 205 // Log::Status("DIE at offset 0x%8.8x is beyond the end of the current 206 // compile unit (0x%8.8x)", m_offset, cu_end_offset); 207 if ((offset < cu_end_offset) && debug_info_data.ValidOffset(offset)) { 208 m_offset = offset; 209 210 const uint64_t abbr_idx = debug_info_data.GetULEB128(&offset); 211 assert(abbr_idx < (1 << DIE_ABBR_IDX_BITSIZE)); 212 m_abbr_idx = abbr_idx; 213 if (abbr_idx) { 214 const DWARFAbbreviationDeclaration *abbrevDecl = 215 cu->GetAbbreviations()->GetAbbreviationDeclaration(abbr_idx); 216 217 if (abbrevDecl) { 218 m_tag = abbrevDecl->Tag(); 219 m_has_children = abbrevDecl->HasChildren(); 220 221 bool isCompileUnitTag = m_tag == DW_TAG_compile_unit; 222 if (cu && isCompileUnitTag) 223 const_cast<DWARFCompileUnit *>(cu)->SetBaseAddress(0); 224 225 // Skip all data in the .debug_info for the attributes 226 const uint32_t numAttributes = abbrevDecl->NumAttributes(); 227 uint32_t i; 228 dw_attr_t attr; 229 dw_form_t form; 230 for (i = 0; i < numAttributes; ++i) { 231 abbrevDecl->GetAttrAndFormByIndexUnchecked(i, attr, form); 232 233 if (isCompileUnitTag && 234 ((attr == DW_AT_entry_pc) || (attr == DW_AT_low_pc))) { 235 DWARFFormValue form_value(cu, form); 236 if (form_value.ExtractValue(debug_info_data, &offset)) { 237 if (attr == DW_AT_low_pc || attr == DW_AT_entry_pc) 238 const_cast<DWARFCompileUnit *>(cu)->SetBaseAddress( 239 form_value.Address()); 240 } 241 } else { 242 bool form_is_indirect = false; 243 do { 244 form_is_indirect = false; 245 uint32_t form_size = 0; 246 switch (form) { 247 // Blocks if inlined data that have a length field and the data 248 // bytes 249 // inlined in the .debug_info 250 case DW_FORM_exprloc: 251 case DW_FORM_block: 252 form_size = debug_info_data.GetULEB128(&offset); 253 break; 254 case DW_FORM_block1: 255 form_size = debug_info_data.GetU8(&offset); 256 break; 257 case DW_FORM_block2: 258 form_size = debug_info_data.GetU16(&offset); 259 break; 260 case DW_FORM_block4: 261 form_size = debug_info_data.GetU32(&offset); 262 break; 263 264 // Inlined NULL terminated C-strings 265 case DW_FORM_string: 266 debug_info_data.GetCStr(&offset); 267 break; 268 269 // Compile unit address sized values 270 case DW_FORM_addr: 271 form_size = cu->GetAddressByteSize(); 272 break; 273 case DW_FORM_ref_addr: 274 if (cu->GetVersion() <= 2) 275 form_size = cu->GetAddressByteSize(); 276 else 277 form_size = cu->IsDWARF64() ? 8 : 4; 278 break; 279 280 // 0 sized form 281 case DW_FORM_flag_present: 282 form_size = 0; 283 break; 284 285 // 1 byte values 286 case DW_FORM_data1: 287 case DW_FORM_flag: 288 case DW_FORM_ref1: 289 form_size = 1; 290 break; 291 292 // 2 byte values 293 case DW_FORM_data2: 294 case DW_FORM_ref2: 295 form_size = 2; 296 break; 297 298 // 4 byte values 299 case DW_FORM_data4: 300 case DW_FORM_ref4: 301 form_size = 4; 302 break; 303 304 // 8 byte values 305 case DW_FORM_data8: 306 case DW_FORM_ref8: 307 case DW_FORM_ref_sig8: 308 form_size = 8; 309 break; 310 311 // signed or unsigned LEB 128 values 312 case DW_FORM_sdata: 313 case DW_FORM_udata: 314 case DW_FORM_ref_udata: 315 case DW_FORM_GNU_addr_index: 316 case DW_FORM_GNU_str_index: 317 debug_info_data.Skip_LEB128(&offset); 318 break; 319 320 case DW_FORM_indirect: 321 form = debug_info_data.GetULEB128(&offset); 322 form_is_indirect = true; 323 break; 324 325 case DW_FORM_strp: 326 case DW_FORM_sec_offset: 327 if (cu->IsDWARF64()) 328 debug_info_data.GetU64(&offset); 329 else 330 debug_info_data.GetU32(&offset); 331 break; 332 333 default: 334 *offset_ptr = offset; 335 return false; 336 } 337 338 offset += form_size; 339 } while (form_is_indirect); 340 } 341 } 342 *offset_ptr = offset; 343 return true; 344 } 345 } else { 346 m_tag = 0; 347 m_has_children = false; 348 *offset_ptr = offset; 349 return true; // NULL debug tag entry 350 } 351 } 352 353 return false; 354} 355 356//---------------------------------------------------------------------- 357// DumpAncestry 358// 359// Dumps all of a debug information entries parents up until oldest and 360// all of it's attributes to the specified stream. 361//---------------------------------------------------------------------- 362void DWARFDebugInfoEntry::DumpAncestry(SymbolFileDWARF *dwarf2Data, 363 const DWARFCompileUnit *cu, 364 const DWARFDebugInfoEntry *oldest, 365 Stream &s, 366 uint32_t recurse_depth) const { 367 const DWARFDebugInfoEntry *parent = GetParent(); 368 if (parent && parent != oldest) 369 parent->DumpAncestry(dwarf2Data, cu, oldest, s, 0); 370 Dump(dwarf2Data, cu, s, recurse_depth); 371} 372 373//---------------------------------------------------------------------- 374// GetDIENamesAndRanges 375// 376// Gets the valid address ranges for a given DIE by looking for a 377// DW_AT_low_pc/DW_AT_high_pc pair, DW_AT_entry_pc, or DW_AT_ranges 378// attributes. 379//---------------------------------------------------------------------- 380bool DWARFDebugInfoEntry::GetDIENamesAndRanges( 381 SymbolFileDWARF *dwarf2Data, const DWARFCompileUnit *cu, const char *&name, 382 const char *&mangled, DWARFRangeList &ranges, int &decl_file, 383 int &decl_line, int &decl_column, int &call_file, int &call_line, 384 int &call_column, DWARFExpression *frame_base) const { 385 if (dwarf2Data == nullptr) 386 return false; 387 388 SymbolFileDWARFDwo *dwo_symbol_file = cu->GetDwoSymbolFile(); 389 if (dwo_symbol_file) 390 return GetDIENamesAndRanges( 391 dwo_symbol_file, dwo_symbol_file->GetCompileUnit(), name, mangled, 392 ranges, decl_file, decl_line, decl_column, call_file, call_line, 393 call_column, frame_base); 394 395 dw_addr_t lo_pc = LLDB_INVALID_ADDRESS; 396 dw_addr_t hi_pc = LLDB_INVALID_ADDRESS; 397 std::vector<DIERef> die_refs; 398 bool set_frame_base_loclist_addr = false; 399 400 lldb::offset_t offset; 401 const DWARFAbbreviationDeclaration *abbrevDecl = 402 GetAbbreviationDeclarationPtr(dwarf2Data, cu, offset); 403 404 lldb::ModuleSP module = dwarf2Data->GetObjectFile()->GetModule(); 405 406 if (abbrevDecl) { 407 const DWARFDataExtractor &debug_info_data = 408 dwarf2Data->get_debug_info_data(); 409 410 if (!debug_info_data.ValidOffset(offset)) 411 return false; 412 413 const uint32_t numAttributes = abbrevDecl->NumAttributes(); 414 uint32_t i; 415 dw_attr_t attr; 416 dw_form_t form; 417 bool do_offset = false; 418 419 for (i = 0; i < numAttributes; ++i) { 420 abbrevDecl->GetAttrAndFormByIndexUnchecked(i, attr, form); 421 DWARFFormValue form_value(cu, form); 422 if (form_value.ExtractValue(debug_info_data, &offset)) { 423 switch (attr) { 424 case DW_AT_low_pc: 425 lo_pc = form_value.Address(); 426 427 if (do_offset) 428 hi_pc += lo_pc; 429 do_offset = false; 430 break; 431 432 case DW_AT_entry_pc: 433 lo_pc = form_value.Address(); 434 break; 435 436 case DW_AT_high_pc: 437 if (form_value.Form() == DW_FORM_addr || 438 form_value.Form() == DW_FORM_GNU_addr_index) { 439 hi_pc = form_value.Address(); 440 } else { 441 hi_pc = form_value.Unsigned(); 442 if (lo_pc == LLDB_INVALID_ADDRESS) 443 do_offset = hi_pc != LLDB_INVALID_ADDRESS; 444 else 445 hi_pc += lo_pc; // DWARF 4 introduces <offset-from-lo-pc> to save 446 // on relocations 447 } 448 break; 449 450 case DW_AT_ranges: { 451 const DWARFDebugRanges *debug_ranges = dwarf2Data->DebugRanges(); 452 if (debug_ranges) { 453 debug_ranges->FindRanges(cu->GetRangesBase(), form_value.Unsigned(), ranges); 454 // All DW_AT_ranges are relative to the base address of the 455 // compile unit. We add the compile unit base address to make 456 // sure all the addresses are properly fixed up. 457 ranges.Slide(cu->GetBaseAddress()); 458 } else { 459 cu->GetSymbolFileDWARF()->GetObjectFile()->GetModule()->ReportError( 460 "{0x%8.8x}: DIE has DW_AT_ranges(0x%" PRIx64 461 ") attribute yet DWARF has no .debug_ranges, please file a bug " 462 "and attach the file at the start of this error message", 463 m_offset, form_value.Unsigned()); 464 } 465 } break; 466 467 case DW_AT_name: 468 if (name == NULL) 469 name = form_value.AsCString(); 470 break; 471 472 case DW_AT_MIPS_linkage_name: 473 case DW_AT_linkage_name: 474 if (mangled == NULL) 475 mangled = form_value.AsCString(); 476 break; 477 478 case DW_AT_abstract_origin: 479 die_refs.emplace_back(form_value); 480 break; 481 482 case DW_AT_specification: 483 die_refs.emplace_back(form_value); 484 break; 485 486 case DW_AT_decl_file: 487 if (decl_file == 0) 488 decl_file = form_value.Unsigned(); 489 break; 490 491 case DW_AT_decl_line: 492 if (decl_line == 0) 493 decl_line = form_value.Unsigned(); 494 break; 495 496 case DW_AT_decl_column: 497 if (decl_column == 0) 498 decl_column = form_value.Unsigned(); 499 break; 500 501 case DW_AT_call_file: 502 if (call_file == 0) 503 call_file = form_value.Unsigned(); 504 break; 505 506 case DW_AT_call_line: 507 if (call_line == 0) 508 call_line = form_value.Unsigned(); 509 break; 510 511 case DW_AT_call_column: 512 if (call_column == 0) 513 call_column = form_value.Unsigned(); 514 break; 515 516 case DW_AT_frame_base: 517 if (frame_base) { 518 if (form_value.BlockData()) { 519 uint32_t block_offset = 520 form_value.BlockData() - debug_info_data.GetDataStart(); 521 uint32_t block_length = form_value.Unsigned(); 522 frame_base->SetOpcodeData(module, debug_info_data, block_offset, 523 block_length); 524 } else { 525 const DWARFDataExtractor &debug_loc_data = 526 dwarf2Data->get_debug_loc_data(); 527 const dw_offset_t debug_loc_offset = form_value.Unsigned(); 528 529 size_t loc_list_length = DWARFExpression::LocationListSize( 530 cu, debug_loc_data, debug_loc_offset); 531 if (loc_list_length > 0) { 532 frame_base->SetOpcodeData(module, debug_loc_data, 533 debug_loc_offset, loc_list_length); 534 if (lo_pc != LLDB_INVALID_ADDRESS) { 535 assert(lo_pc >= cu->GetBaseAddress()); 536 frame_base->SetLocationListSlide(lo_pc - 537 cu->GetBaseAddress()); 538 } else { 539 set_frame_base_loclist_addr = true; 540 } 541 } 542 } 543 } 544 break; 545 546 default: 547 break; 548 } 549 } 550 } 551 } 552 553 if (ranges.IsEmpty()) { 554 if (lo_pc != LLDB_INVALID_ADDRESS) { 555 if (hi_pc != LLDB_INVALID_ADDRESS && hi_pc > lo_pc) 556 ranges.Append(DWARFRangeList::Entry(lo_pc, hi_pc - lo_pc)); 557 else 558 ranges.Append(DWARFRangeList::Entry(lo_pc, 0)); 559 } 560 } 561 562 if (set_frame_base_loclist_addr) { 563 dw_addr_t lowest_range_pc = ranges.GetMinRangeBase(0); 564 assert(lowest_range_pc >= cu->GetBaseAddress()); 565 frame_base->SetLocationListSlide(lowest_range_pc - cu->GetBaseAddress()); 566 } 567 568 if (ranges.IsEmpty() || name == NULL || mangled == NULL) { 569 for (const DIERef &die_ref : die_refs) { 570 if (die_ref.die_offset != DW_INVALID_OFFSET) { 571 DWARFDIE die = dwarf2Data->GetDIE(die_ref); 572 if (die) 573 die.GetDIE()->GetDIENamesAndRanges( 574 die.GetDWARF(), die.GetCU(), name, mangled, ranges, decl_file, 575 decl_line, decl_column, call_file, call_line, call_column); 576 } 577 } 578 } 579 return !ranges.IsEmpty(); 580} 581 582//---------------------------------------------------------------------- 583// Dump 584// 585// Dumps a debug information entry and all of it's attributes to the 586// specified stream. 587//---------------------------------------------------------------------- 588void DWARFDebugInfoEntry::Dump(SymbolFileDWARF *dwarf2Data, 589 const DWARFCompileUnit *cu, Stream &s, 590 uint32_t recurse_depth) const { 591 const DWARFDataExtractor &debug_info_data = dwarf2Data->get_debug_info_data(); 592 lldb::offset_t offset = m_offset; 593 594 if (debug_info_data.ValidOffset(offset)) { 595 dw_uleb128_t abbrCode = debug_info_data.GetULEB128(&offset); 596 597 s.Printf("\n0x%8.8x: ", m_offset); 598 s.Indent(); 599 if (abbrCode != m_abbr_idx) { 600 s.Printf("error: DWARF has been modified\n"); 601 } else if (abbrCode) { 602 const DWARFAbbreviationDeclaration *abbrevDecl = 603 cu->GetAbbreviations()->GetAbbreviationDeclaration(abbrCode); 604 605 if (abbrevDecl) { 606 s.PutCString(DW_TAG_value_to_name(abbrevDecl->Tag())); 607 s.Printf(" [%u] %c\n", abbrCode, abbrevDecl->HasChildren() ? '*' : ' '); 608 609 // Dump all data in the .debug_info for the attributes 610 const uint32_t numAttributes = abbrevDecl->NumAttributes(); 611 uint32_t i; 612 dw_attr_t attr; 613 dw_form_t form; 614 for (i = 0; i < numAttributes; ++i) { 615 abbrevDecl->GetAttrAndFormByIndexUnchecked(i, attr, form); 616 617 DumpAttribute(dwarf2Data, cu, debug_info_data, &offset, s, attr, 618 form); 619 } 620 621 const DWARFDebugInfoEntry *child = GetFirstChild(); 622 if (recurse_depth > 0 && child) { 623 s.IndentMore(); 624 625 while (child) { 626 child->Dump(dwarf2Data, cu, s, recurse_depth - 1); 627 child = child->GetSibling(); 628 } 629 s.IndentLess(); 630 } 631 } else 632 s.Printf("Abbreviation code note found in 'debug_abbrev' class for " 633 "code: %u\n", 634 abbrCode); 635 } else { 636 s.Printf("NULL\n"); 637 } 638 } 639} 640 641void DWARFDebugInfoEntry::DumpLocation(SymbolFileDWARF *dwarf2Data, 642 DWARFCompileUnit *cu, Stream &s) const { 643 const DWARFDIE cu_die = cu->GetCompileUnitDIEOnly(); 644 const char *cu_name = NULL; 645 if (cu_die) 646 cu_name = cu_die.GetName(); 647 const char *obj_file_name = NULL; 648 ObjectFile *obj_file = dwarf2Data->GetObjectFile(); 649 if (obj_file) 650 obj_file_name = 651 obj_file->GetFileSpec().GetFilename().AsCString("<Unknown>"); 652 const char *die_name = GetName(dwarf2Data, cu); 653 s.Printf("0x%8.8x/0x%8.8x: %-30s (from %s in %s)", cu->GetOffset(), 654 GetOffset(), die_name ? die_name : "", cu_name ? cu_name : "<NULL>", 655 obj_file_name ? obj_file_name : "<NULL>"); 656} 657 658//---------------------------------------------------------------------- 659// DumpAttribute 660// 661// Dumps a debug information entry attribute along with it's form. Any 662// special display of attributes is done (disassemble location lists, 663// show enumeration values for attributes, etc). 664//---------------------------------------------------------------------- 665void DWARFDebugInfoEntry::DumpAttribute( 666 SymbolFileDWARF *dwarf2Data, const DWARFCompileUnit *cu, 667 const DWARFDataExtractor &debug_info_data, lldb::offset_t *offset_ptr, 668 Stream &s, dw_attr_t attr, dw_form_t form) { 669 bool show_form = s.GetFlags().Test(DWARFDebugInfo::eDumpFlag_ShowForm); 670 671 s.Printf(" "); 672 s.Indent(DW_AT_value_to_name(attr)); 673 674 if (show_form) { 675 s.Printf("[%s", DW_FORM_value_to_name(form)); 676 } 677 678 DWARFFormValue form_value(cu, form); 679 680 if (!form_value.ExtractValue(debug_info_data, offset_ptr)) 681 return; 682 683 if (show_form) { 684 if (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, DWARFCompileUnit::GetAddressByteSize(cu), 4, false); 718 } else { 719 // We have a location list offset as the value that is 720 // the offset into the .debug_loc section that describes 721 // the value over it's lifetime 722 uint64_t debug_loc_offset = form_value.Unsigned(); 723 if (dwarf2Data) { 724 DWARFExpression::PrintDWARFLocationList( 725 s, cu, dwarf2Data->get_debug_loc_data(), debug_loc_offset); 726 } 727 } 728 } break; 729 730 case DW_AT_abstract_origin: 731 case DW_AT_specification: { 732 uint64_t abstract_die_offset = form_value.Reference(); 733 form_value.Dump(s); 734 // *ostrm_ptr << HEX32 << abstract_die_offset << " ( "; 735 GetName(dwarf2Data, cu, abstract_die_offset, s); 736 } break; 737 738 case DW_AT_type: { 739 uint64_t type_die_offset = form_value.Reference(); 740 s.PutCString(" ( "); 741 AppendTypeName(dwarf2Data, cu, type_die_offset, s); 742 s.PutCString(" )"); 743 } break; 744 745 case DW_AT_ranges: { 746 lldb::offset_t ranges_offset = form_value.Unsigned(); 747 dw_addr_t base_addr = cu ? cu->GetBaseAddress() : 0; 748 if (dwarf2Data) 749 DWARFDebugRanges::Dump(s, dwarf2Data->get_debug_ranges_data(), 750 &ranges_offset, base_addr); 751 } break; 752 753 default: 754 break; 755 } 756 757 s.PutCString(" )\n"); 758} 759 760//---------------------------------------------------------------------- 761// Get all attribute values for a given DIE, including following any 762// specification or abstract origin attributes and including those in 763// the results. Any duplicate attributes will have the first instance 764// take precedence (this can happen for declaration attributes). 765//---------------------------------------------------------------------- 766size_t DWARFDebugInfoEntry::GetAttributes( 767 const DWARFCompileUnit *cu, DWARFFormValue::FixedFormSizes fixed_form_sizes, 768 DWARFAttributes &attributes, uint32_t curr_depth) const { 769 SymbolFileDWARF *dwarf2Data = nullptr; 770 const DWARFAbbreviationDeclaration *abbrevDecl = nullptr; 771 lldb::offset_t offset = 0; 772 if (cu) { 773 if (m_tag != DW_TAG_compile_unit) { 774 SymbolFileDWARFDwo *dwo_symbol_file = cu->GetDwoSymbolFile(); 775 if (dwo_symbol_file) 776 return GetAttributes(dwo_symbol_file->GetCompileUnit(), 777 fixed_form_sizes, attributes, curr_depth); 778 } 779 780 dwarf2Data = cu->GetSymbolFileDWARF(); 781 abbrevDecl = GetAbbreviationDeclarationPtr(dwarf2Data, cu, offset); 782 } 783 784 if (abbrevDecl) { 785 const DWARFDataExtractor &debug_info_data = 786 dwarf2Data->get_debug_info_data(); 787 788 if (fixed_form_sizes.Empty()) 789 fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize( 790 cu->GetAddressByteSize(), cu->IsDWARF64()); 791 792 const uint32_t num_attributes = abbrevDecl->NumAttributes(); 793 uint32_t i; 794 dw_attr_t attr; 795 dw_form_t form; 796 for (i = 0; i < num_attributes; ++i) { 797 abbrevDecl->GetAttrAndFormByIndexUnchecked(i, attr, form); 798 799 // If we are tracking down DW_AT_specification or DW_AT_abstract_origin 800 // attributes, the depth will be non-zero. We need to omit certain 801 // attributes that don't make sense. 802 switch (attr) { 803 case DW_AT_sibling: 804 case DW_AT_declaration: 805 if (curr_depth > 0) { 806 // This attribute doesn't make sense when combined with 807 // the DIE that references this DIE. We know a DIE is 808 // referencing this DIE because curr_depth is not zero 809 break; 810 } 811 LLVM_FALLTHROUGH; 812 default: 813 attributes.Append(cu, offset, attr, form); 814 break; 815 } 816 817 if ((attr == DW_AT_specification) || (attr == DW_AT_abstract_origin)) { 818 DWARFFormValue form_value(cu, form); 819 if (form_value.ExtractValue(debug_info_data, &offset)) { 820 dw_offset_t die_offset = form_value.Reference(); 821 DWARFDIE spec_die = 822 const_cast<DWARFCompileUnit *>(cu)->GetDIE(die_offset); 823 if (spec_die) 824 spec_die.GetAttributes(attributes, curr_depth + 1); 825 } 826 } else { 827 const uint8_t fixed_skip_size = fixed_form_sizes.GetSize(form); 828 if (fixed_skip_size) 829 offset += fixed_skip_size; 830 else 831 DWARFFormValue::SkipValue(form, debug_info_data, &offset, cu); 832 } 833 } 834 } else { 835 attributes.Clear(); 836 } 837 return attributes.Size(); 838} 839 840//---------------------------------------------------------------------- 841// GetAttributeValue 842// 843// Get the value of an attribute and return the .debug_info offset of the 844// attribute if it was properly extracted into form_value, or zero 845// if we fail since an offset of zero is invalid for an attribute (it 846// would be a compile unit header). 847//---------------------------------------------------------------------- 848dw_offset_t DWARFDebugInfoEntry::GetAttributeValue( 849 SymbolFileDWARF *dwarf2Data, const DWARFCompileUnit *cu, 850 const dw_attr_t attr, DWARFFormValue &form_value, 851 dw_offset_t *end_attr_offset_ptr, 852 bool check_specification_or_abstract_origin) const { 853 SymbolFileDWARFDwo *dwo_symbol_file = cu->GetDwoSymbolFile(); 854 if (dwo_symbol_file && m_tag != DW_TAG_compile_unit) 855 return GetAttributeValue(dwo_symbol_file, dwo_symbol_file->GetCompileUnit(), 856 attr, form_value, end_attr_offset_ptr, 857 check_specification_or_abstract_origin); 858 859 lldb::offset_t offset; 860 const DWARFAbbreviationDeclaration *abbrevDecl = 861 GetAbbreviationDeclarationPtr(dwarf2Data, cu, offset); 862 863 if (abbrevDecl) { 864 uint32_t attr_idx = abbrevDecl->FindAttributeIndex(attr); 865 866 if (attr_idx != DW_INVALID_INDEX) { 867 const DWARFDataExtractor &debug_info_data = 868 dwarf2Data->get_debug_info_data(); 869 870 uint32_t idx = 0; 871 while (idx < attr_idx) 872 DWARFFormValue::SkipValue(abbrevDecl->GetFormByIndex(idx++), 873 debug_info_data, &offset, cu); 874 875 const dw_offset_t attr_offset = offset; 876 form_value.SetCompileUnit(cu); 877 form_value.SetForm(abbrevDecl->GetFormByIndex(idx)); 878 if (form_value.ExtractValue(debug_info_data, &offset)) { 879 if (end_attr_offset_ptr) 880 *end_attr_offset_ptr = offset; 881 return attr_offset; 882 } 883 } 884 } 885 886 if (check_specification_or_abstract_origin) { 887 if (GetAttributeValue(dwarf2Data, cu, DW_AT_specification, form_value)) { 888 DWARFDIE die = 889 const_cast<DWARFCompileUnit *>(cu)->GetDIE(form_value.Reference()); 890 if (die) { 891 dw_offset_t die_offset = die.GetDIE()->GetAttributeValue( 892 die.GetDWARF(), die.GetCU(), attr, form_value, end_attr_offset_ptr, 893 false); 894 if (die_offset) 895 return die_offset; 896 } 897 } 898 899 if (GetAttributeValue(dwarf2Data, cu, DW_AT_abstract_origin, form_value)) { 900 DWARFDIE die = 901 const_cast<DWARFCompileUnit *>(cu)->GetDIE(form_value.Reference()); 902 if (die) { 903 dw_offset_t die_offset = die.GetDIE()->GetAttributeValue( 904 die.GetDWARF(), die.GetCU(), attr, form_value, end_attr_offset_ptr, 905 false); 906 if (die_offset) 907 return die_offset; 908 } 909 } 910 } 911 912 if (!dwo_symbol_file) 913 return 0; 914 915 DWARFCompileUnit *dwo_cu = dwo_symbol_file->GetCompileUnit(); 916 if (!dwo_cu) 917 return 0; 918 919 DWARFDIE dwo_cu_die = dwo_cu->GetCompileUnitDIEOnly(); 920 if (!dwo_cu_die.IsValid()) 921 return 0; 922 923 return dwo_cu_die.GetDIE()->GetAttributeValue( 924 dwo_symbol_file, dwo_cu, attr, form_value, end_attr_offset_ptr, 925 check_specification_or_abstract_origin); 926} 927 928//---------------------------------------------------------------------- 929// GetAttributeValueAsString 930// 931// Get the value of an attribute as a string return it. The resulting 932// pointer to the string data exists within the supplied SymbolFileDWARF 933// and will only be available as long as the SymbolFileDWARF is still around 934// and it's content doesn't change. 935//---------------------------------------------------------------------- 936const char *DWARFDebugInfoEntry::GetAttributeValueAsString( 937 SymbolFileDWARF *dwarf2Data, const DWARFCompileUnit *cu, 938 const dw_attr_t attr, const char *fail_value, 939 bool check_specification_or_abstract_origin) const { 940 DWARFFormValue form_value; 941 if (GetAttributeValue(dwarf2Data, cu, attr, form_value, nullptr, 942 check_specification_or_abstract_origin)) 943 return form_value.AsCString(); 944 return fail_value; 945} 946 947//---------------------------------------------------------------------- 948// GetAttributeValueAsUnsigned 949// 950// Get the value of an attribute as unsigned and return it. 951//---------------------------------------------------------------------- 952uint64_t DWARFDebugInfoEntry::GetAttributeValueAsUnsigned( 953 SymbolFileDWARF *dwarf2Data, const DWARFCompileUnit *cu, 954 const dw_attr_t attr, uint64_t fail_value, 955 bool check_specification_or_abstract_origin) const { 956 DWARFFormValue form_value; 957 if (GetAttributeValue(dwarf2Data, cu, attr, form_value, nullptr, 958 check_specification_or_abstract_origin)) 959 return form_value.Unsigned(); 960 return fail_value; 961} 962 963//---------------------------------------------------------------------- 964// GetAttributeValueAsSigned 965// 966// Get the value of an attribute a signed value and return it. 967//---------------------------------------------------------------------- 968int64_t DWARFDebugInfoEntry::GetAttributeValueAsSigned( 969 SymbolFileDWARF *dwarf2Data, const DWARFCompileUnit *cu, 970 const dw_attr_t attr, int64_t fail_value, 971 bool check_specification_or_abstract_origin) const { 972 DWARFFormValue form_value; 973 if (GetAttributeValue(dwarf2Data, cu, attr, form_value, nullptr, 974 check_specification_or_abstract_origin)) 975 return form_value.Signed(); 976 return fail_value; 977} 978 979//---------------------------------------------------------------------- 980// GetAttributeValueAsReference 981// 982// Get the value of an attribute as reference and fix up and compile 983// unit relative offsets as needed. 984//---------------------------------------------------------------------- 985uint64_t DWARFDebugInfoEntry::GetAttributeValueAsReference( 986 SymbolFileDWARF *dwarf2Data, const DWARFCompileUnit *cu, 987 const dw_attr_t attr, uint64_t fail_value, 988 bool check_specification_or_abstract_origin) const { 989 DWARFFormValue form_value; 990 if (GetAttributeValue(dwarf2Data, cu, attr, form_value, nullptr, 991 check_specification_or_abstract_origin)) 992 return form_value.Reference(); 993 return fail_value; 994} 995 996uint64_t DWARFDebugInfoEntry::GetAttributeValueAsAddress( 997 SymbolFileDWARF *dwarf2Data, const DWARFCompileUnit *cu, 998 const dw_attr_t attr, uint64_t fail_value, 999 bool check_specification_or_abstract_origin) const { 1000 DWARFFormValue form_value; 1001 if (GetAttributeValue(dwarf2Data, cu, attr, form_value, nullptr, 1002 check_specification_or_abstract_origin)) 1003 return form_value.Address(); 1004 return fail_value; 1005} 1006 1007//---------------------------------------------------------------------- 1008// GetAttributeHighPC 1009// 1010// Get the hi_pc, adding hi_pc to lo_pc when specified 1011// as an <offset-from-low-pc>. 1012// 1013// Returns the hi_pc or fail_value. 1014//---------------------------------------------------------------------- 1015dw_addr_t DWARFDebugInfoEntry::GetAttributeHighPC( 1016 SymbolFileDWARF *dwarf2Data, const DWARFCompileUnit *cu, dw_addr_t lo_pc, 1017 uint64_t fail_value, bool check_specification_or_abstract_origin) const { 1018 DWARFFormValue form_value; 1019 if (GetAttributeValue(dwarf2Data, cu, DW_AT_high_pc, form_value, nullptr, 1020 check_specification_or_abstract_origin)) { 1021 dw_form_t form = form_value.Form(); 1022 if (form == DW_FORM_addr || form == DW_FORM_GNU_addr_index) 1023 return form_value.Address(); 1024 1025 // DWARF4 can specify the hi_pc as an <offset-from-lowpc> 1026 return lo_pc + form_value.Unsigned(); 1027 } 1028 return fail_value; 1029} 1030 1031//---------------------------------------------------------------------- 1032// GetAttributeAddressRange 1033// 1034// Get the lo_pc and hi_pc, adding hi_pc to lo_pc when specified 1035// as an <offset-from-low-pc>. 1036// 1037// Returns true or sets lo_pc and hi_pc to fail_value. 1038//---------------------------------------------------------------------- 1039bool DWARFDebugInfoEntry::GetAttributeAddressRange( 1040 SymbolFileDWARF *dwarf2Data, const DWARFCompileUnit *cu, dw_addr_t &lo_pc, 1041 dw_addr_t &hi_pc, uint64_t fail_value, 1042 bool check_specification_or_abstract_origin) const { 1043 lo_pc = GetAttributeValueAsAddress(dwarf2Data, cu, DW_AT_low_pc, fail_value, 1044 check_specification_or_abstract_origin); 1045 if (lo_pc != fail_value) { 1046 hi_pc = GetAttributeHighPC(dwarf2Data, cu, lo_pc, fail_value, 1047 check_specification_or_abstract_origin); 1048 if (hi_pc != fail_value) 1049 return true; 1050 } 1051 lo_pc = fail_value; 1052 hi_pc = fail_value; 1053 return false; 1054} 1055 1056size_t DWARFDebugInfoEntry::GetAttributeAddressRanges( 1057 SymbolFileDWARF *dwarf2Data, const DWARFCompileUnit *cu, 1058 DWARFRangeList &ranges, bool check_hi_lo_pc, 1059 bool check_specification_or_abstract_origin) const { 1060 ranges.Clear(); 1061 1062 dw_offset_t debug_ranges_offset = GetAttributeValueAsUnsigned( 1063 dwarf2Data, cu, DW_AT_ranges, DW_INVALID_OFFSET, 1064 check_specification_or_abstract_origin); 1065 if (debug_ranges_offset != DW_INVALID_OFFSET) { 1066 DWARFDebugRanges *debug_ranges = dwarf2Data->DebugRanges(); 1067 1068 debug_ranges->FindRanges(cu->GetRangesBase(), debug_ranges_offset, ranges); 1069 ranges.Slide(cu->GetBaseAddress()); 1070 } else if (check_hi_lo_pc) { 1071 dw_addr_t lo_pc = LLDB_INVALID_ADDRESS; 1072 dw_addr_t hi_pc = LLDB_INVALID_ADDRESS; 1073 if (GetAttributeAddressRange(dwarf2Data, cu, lo_pc, hi_pc, 1074 LLDB_INVALID_ADDRESS, 1075 check_specification_or_abstract_origin)) { 1076 if (lo_pc < hi_pc) 1077 ranges.Append(DWARFRangeList::Entry(lo_pc, hi_pc - lo_pc)); 1078 } 1079 } 1080 return ranges.GetSize(); 1081} 1082 1083//---------------------------------------------------------------------- 1084// GetName 1085// 1086// Get value of the DW_AT_name attribute and return it if one exists, 1087// else return NULL. 1088//---------------------------------------------------------------------- 1089const char *DWARFDebugInfoEntry::GetName(SymbolFileDWARF *dwarf2Data, 1090 const DWARFCompileUnit *cu) const { 1091 return GetAttributeValueAsString(dwarf2Data, cu, DW_AT_name, nullptr, true); 1092} 1093 1094//---------------------------------------------------------------------- 1095// GetMangledName 1096// 1097// Get value of the DW_AT_MIPS_linkage_name attribute and return it if 1098// one exists, else return the value of the DW_AT_name attribute 1099//---------------------------------------------------------------------- 1100const char * 1101DWARFDebugInfoEntry::GetMangledName(SymbolFileDWARF *dwarf2Data, 1102 const DWARFCompileUnit *cu, 1103 bool substitute_name_allowed) const { 1104 const char *name = nullptr; 1105 1106 name = GetAttributeValueAsString(dwarf2Data, cu, DW_AT_MIPS_linkage_name, 1107 nullptr, true); 1108 if (name) 1109 return name; 1110 1111 name = GetAttributeValueAsString(dwarf2Data, cu, DW_AT_linkage_name, nullptr, 1112 true); 1113 if (name) 1114 return name; 1115 1116 if (!substitute_name_allowed) 1117 return nullptr; 1118 1119 name = GetAttributeValueAsString(dwarf2Data, cu, DW_AT_name, nullptr, true); 1120 return name; 1121} 1122 1123//---------------------------------------------------------------------- 1124// GetPubname 1125// 1126// Get value the name for a DIE as it should appear for a 1127// .debug_pubnames or .debug_pubtypes section. 1128//---------------------------------------------------------------------- 1129const char *DWARFDebugInfoEntry::GetPubname(SymbolFileDWARF *dwarf2Data, 1130 const DWARFCompileUnit *cu) const { 1131 const char *name = nullptr; 1132 if (!dwarf2Data) 1133 return name; 1134 1135 name = GetAttributeValueAsString(dwarf2Data, cu, DW_AT_MIPS_linkage_name, 1136 nullptr, true); 1137 if (name) 1138 return name; 1139 1140 name = GetAttributeValueAsString(dwarf2Data, cu, DW_AT_linkage_name, nullptr, 1141 true); 1142 if (name) 1143 return name; 1144 1145 name = GetAttributeValueAsString(dwarf2Data, cu, DW_AT_name, nullptr, true); 1146 return name; 1147} 1148 1149//---------------------------------------------------------------------- 1150// GetName 1151// 1152// Get value of the DW_AT_name attribute for a debug information entry 1153// that exists at offset "die_offset" and place that value into the 1154// supplied stream object. If the DIE is a NULL object "NULL" is placed 1155// into the stream, and if no DW_AT_name attribute exists for the DIE 1156// then nothing is printed. 1157//---------------------------------------------------------------------- 1158bool DWARFDebugInfoEntry::GetName(SymbolFileDWARF *dwarf2Data, 1159 const DWARFCompileUnit *cu, 1160 const dw_offset_t die_offset, Stream &s) { 1161 if (dwarf2Data == NULL) { 1162 s.PutCString("NULL"); 1163 return false; 1164 } 1165 1166 DWARFDebugInfoEntry die; 1167 lldb::offset_t offset = die_offset; 1168 if (die.Extract(dwarf2Data, cu, &offset)) { 1169 if (die.IsNULL()) { 1170 s.PutCString("NULL"); 1171 return true; 1172 } else { 1173 const char *name = die.GetAttributeValueAsString( 1174 dwarf2Data, cu, DW_AT_name, nullptr, true); 1175 if (name) { 1176 s.PutCString(name); 1177 return true; 1178 } 1179 } 1180 } 1181 return false; 1182} 1183 1184//---------------------------------------------------------------------- 1185// AppendTypeName 1186// 1187// Follows the type name definition down through all needed tags to 1188// end up with a fully qualified type name and dump the results to 1189// the supplied stream. This is used to show the name of types given 1190// a type identifier. 1191//---------------------------------------------------------------------- 1192bool DWARFDebugInfoEntry::AppendTypeName(SymbolFileDWARF *dwarf2Data, 1193 const DWARFCompileUnit *cu, 1194 const dw_offset_t die_offset, 1195 Stream &s) { 1196 if (dwarf2Data == NULL) { 1197 s.PutCString("NULL"); 1198 return false; 1199 } 1200 1201 DWARFDebugInfoEntry die; 1202 lldb::offset_t offset = die_offset; 1203 if (die.Extract(dwarf2Data, cu, &offset)) { 1204 if (die.IsNULL()) { 1205 s.PutCString("NULL"); 1206 return true; 1207 } else { 1208 const char *name = die.GetPubname(dwarf2Data, cu); 1209 if (name) 1210 s.PutCString(name); 1211 else { 1212 bool result = true; 1213 const DWARFAbbreviationDeclaration *abbrevDecl = 1214 die.GetAbbreviationDeclarationPtr(dwarf2Data, cu, offset); 1215 1216 if (abbrevDecl == NULL) 1217 return false; 1218 1219 switch (abbrevDecl->Tag()) { 1220 case DW_TAG_array_type: 1221 break; // print out a "[]" after printing the full type of the element 1222 // below 1223 case DW_TAG_base_type: 1224 s.PutCString("base "); 1225 break; 1226 case DW_TAG_class_type: 1227 s.PutCString("class "); 1228 break; 1229 case DW_TAG_const_type: 1230 s.PutCString("const "); 1231 break; 1232 case DW_TAG_enumeration_type: 1233 s.PutCString("enum "); 1234 break; 1235 case DW_TAG_file_type: 1236 s.PutCString("file "); 1237 break; 1238 case DW_TAG_interface_type: 1239 s.PutCString("interface "); 1240 break; 1241 case DW_TAG_packed_type: 1242 s.PutCString("packed "); 1243 break; 1244 case DW_TAG_pointer_type: 1245 break; // print out a '*' after printing the full type below 1246 case DW_TAG_ptr_to_member_type: 1247 break; // print out a '*' after printing the full type below 1248 case DW_TAG_reference_type: 1249 break; // print out a '&' after printing the full type below 1250 case DW_TAG_restrict_type: 1251 s.PutCString("restrict "); 1252 break; 1253 case DW_TAG_set_type: 1254 s.PutCString("set "); 1255 break; 1256 case DW_TAG_shared_type: 1257 s.PutCString("shared "); 1258 break; 1259 case DW_TAG_string_type: 1260 s.PutCString("string "); 1261 break; 1262 case DW_TAG_structure_type: 1263 s.PutCString("struct "); 1264 break; 1265 case DW_TAG_subrange_type: 1266 s.PutCString("subrange "); 1267 break; 1268 case DW_TAG_subroutine_type: 1269 s.PutCString("function "); 1270 break; 1271 case DW_TAG_thrown_type: 1272 s.PutCString("thrown "); 1273 break; 1274 case DW_TAG_union_type: 1275 s.PutCString("union "); 1276 break; 1277 case DW_TAG_unspecified_type: 1278 s.PutCString("unspecified "); 1279 break; 1280 case DW_TAG_volatile_type: 1281 s.PutCString("volatile "); 1282 break; 1283 default: 1284 return false; 1285 } 1286 1287 // Follow the DW_AT_type if possible 1288 DWARFFormValue form_value; 1289 if (die.GetAttributeValue(dwarf2Data, cu, DW_AT_type, form_value)) { 1290 uint64_t next_die_offset = form_value.Reference(); 1291 result = AppendTypeName(dwarf2Data, cu, next_die_offset, s); 1292 } 1293 1294 switch (abbrevDecl->Tag()) { 1295 case DW_TAG_array_type: 1296 s.PutCString("[]"); 1297 break; 1298 case DW_TAG_pointer_type: 1299 s.PutChar('*'); 1300 break; 1301 case DW_TAG_ptr_to_member_type: 1302 s.PutChar('*'); 1303 break; 1304 case DW_TAG_reference_type: 1305 s.PutChar('&'); 1306 break; 1307 default: 1308 break; 1309 } 1310 return result; 1311 } 1312 } 1313 } 1314 return false; 1315} 1316 1317//---------------------------------------------------------------------- 1318// BuildAddressRangeTable 1319//---------------------------------------------------------------------- 1320void DWARFDebugInfoEntry::BuildAddressRangeTable( 1321 SymbolFileDWARF *dwarf2Data, const DWARFCompileUnit *cu, 1322 DWARFDebugAranges *debug_aranges) const { 1323 if (m_tag) { 1324 if (m_tag == DW_TAG_subprogram) { 1325 dw_addr_t lo_pc = LLDB_INVALID_ADDRESS; 1326 dw_addr_t hi_pc = LLDB_INVALID_ADDRESS; 1327 if (GetAttributeAddressRange(dwarf2Data, cu, lo_pc, hi_pc, 1328 LLDB_INVALID_ADDRESS)) { 1329 /// printf("BuildAddressRangeTable() 0x%8.8x: %30s: [0x%8.8x - 1330 /// 0x%8.8x)\n", m_offset, DW_TAG_value_to_name(tag), lo_pc, hi_pc); 1331 debug_aranges->AppendRange(cu->GetOffset(), lo_pc, hi_pc); 1332 } 1333 } 1334 1335 const DWARFDebugInfoEntry *child = GetFirstChild(); 1336 while (child) { 1337 child->BuildAddressRangeTable(dwarf2Data, cu, debug_aranges); 1338 child = child->GetSibling(); 1339 } 1340 } 1341} 1342 1343//---------------------------------------------------------------------- 1344// BuildFunctionAddressRangeTable 1345// 1346// This function is very similar to the BuildAddressRangeTable function 1347// except that the actual DIE offset for the function is placed in the 1348// table instead of the compile unit offset (which is the way the 1349// standard .debug_aranges section does it). 1350//---------------------------------------------------------------------- 1351void DWARFDebugInfoEntry::BuildFunctionAddressRangeTable( 1352 SymbolFileDWARF *dwarf2Data, const DWARFCompileUnit *cu, 1353 DWARFDebugAranges *debug_aranges) const { 1354 if (m_tag) { 1355 if (m_tag == DW_TAG_subprogram) { 1356 dw_addr_t lo_pc = LLDB_INVALID_ADDRESS; 1357 dw_addr_t hi_pc = LLDB_INVALID_ADDRESS; 1358 if (GetAttributeAddressRange(dwarf2Data, cu, lo_pc, hi_pc, 1359 LLDB_INVALID_ADDRESS)) { 1360 // printf("BuildAddressRangeTable() 0x%8.8x: [0x%16.16" PRIx64 " - 1361 // 0x%16.16" PRIx64 ")\n", m_offset, lo_pc, hi_pc); // DEBUG ONLY 1362 debug_aranges->AppendRange(GetOffset(), lo_pc, hi_pc); 1363 } 1364 } 1365 1366 const DWARFDebugInfoEntry *child = GetFirstChild(); 1367 while (child) { 1368 child->BuildFunctionAddressRangeTable(dwarf2Data, cu, debug_aranges); 1369 child = child->GetSibling(); 1370 } 1371 } 1372} 1373 1374void DWARFDebugInfoEntry::GetDeclContextDIEs( 1375 DWARFCompileUnit *cu, DWARFDIECollection &decl_context_dies) const { 1376 1377 DWARFDIE die(cu, const_cast<DWARFDebugInfoEntry *>(this)); 1378 die.GetDeclContextDIEs(decl_context_dies); 1379} 1380 1381void DWARFDebugInfoEntry::GetDWARFDeclContext( 1382 SymbolFileDWARF *dwarf2Data, DWARFCompileUnit *cu, 1383 DWARFDeclContext &dwarf_decl_ctx) const { 1384 const dw_tag_t tag = Tag(); 1385 if (tag != DW_TAG_compile_unit) { 1386 dwarf_decl_ctx.AppendDeclContext(tag, GetName(dwarf2Data, cu)); 1387 DWARFDIE parent_decl_ctx_die = GetParentDeclContextDIE(dwarf2Data, cu); 1388 if (parent_decl_ctx_die && parent_decl_ctx_die.GetDIE() != this) { 1389 if (parent_decl_ctx_die.Tag() != DW_TAG_compile_unit) 1390 parent_decl_ctx_die.GetDIE()->GetDWARFDeclContext( 1391 parent_decl_ctx_die.GetDWARF(), parent_decl_ctx_die.GetCU(), 1392 dwarf_decl_ctx); 1393 } 1394 } 1395} 1396 1397bool DWARFDebugInfoEntry::MatchesDWARFDeclContext( 1398 SymbolFileDWARF *dwarf2Data, DWARFCompileUnit *cu, 1399 const DWARFDeclContext &dwarf_decl_ctx) const { 1400 1401 DWARFDeclContext this_dwarf_decl_ctx; 1402 GetDWARFDeclContext(dwarf2Data, cu, this_dwarf_decl_ctx); 1403 return this_dwarf_decl_ctx == dwarf_decl_ctx; 1404} 1405 1406DWARFDIE 1407DWARFDebugInfoEntry::GetParentDeclContextDIE(SymbolFileDWARF *dwarf2Data, 1408 DWARFCompileUnit *cu) const { 1409 DWARFAttributes attributes; 1410 GetAttributes(cu, DWARFFormValue::FixedFormSizes(), attributes); 1411 return GetParentDeclContextDIE(dwarf2Data, cu, attributes); 1412} 1413 1414DWARFDIE 1415DWARFDebugInfoEntry::GetParentDeclContextDIE( 1416 SymbolFileDWARF *dwarf2Data, DWARFCompileUnit *cu, 1417 const DWARFAttributes &attributes) const { 1418 DWARFDIE die(cu, const_cast<DWARFDebugInfoEntry *>(this)); 1419 1420 while (die) { 1421 // If this is the original DIE that we are searching for a declaration 1422 // for, then don't look in the cache as we don't want our own decl 1423 // context to be our decl context... 1424 if (die.GetDIE() != this) { 1425 switch (die.Tag()) { 1426 case DW_TAG_compile_unit: 1427 case DW_TAG_namespace: 1428 case DW_TAG_structure_type: 1429 case DW_TAG_union_type: 1430 case DW_TAG_class_type: 1431 return die; 1432 1433 default: 1434 break; 1435 } 1436 } 1437 1438 dw_offset_t die_offset; 1439 1440 die_offset = 1441 attributes.FormValueAsUnsigned(DW_AT_specification, DW_INVALID_OFFSET); 1442 if (die_offset != DW_INVALID_OFFSET) { 1443 DWARFDIE spec_die = cu->GetDIE(die_offset); 1444 if (spec_die) { 1445 DWARFDIE decl_ctx_die = spec_die.GetParentDeclContextDIE(); 1446 if (decl_ctx_die) 1447 return decl_ctx_die; 1448 } 1449 } 1450 1451 die_offset = attributes.FormValueAsUnsigned(DW_AT_abstract_origin, 1452 DW_INVALID_OFFSET); 1453 if (die_offset != DW_INVALID_OFFSET) { 1454 DWARFDIE abs_die = cu->GetDIE(die_offset); 1455 if (abs_die) { 1456 DWARFDIE decl_ctx_die = abs_die.GetParentDeclContextDIE(); 1457 if (decl_ctx_die) 1458 return decl_ctx_die; 1459 } 1460 } 1461 1462 die = die.GetParent(); 1463 } 1464 return DWARFDIE(); 1465} 1466 1467const char *DWARFDebugInfoEntry::GetQualifiedName(SymbolFileDWARF *dwarf2Data, 1468 DWARFCompileUnit *cu, 1469 std::string &storage) const { 1470 DWARFAttributes attributes; 1471 GetAttributes(cu, DWARFFormValue::FixedFormSizes(), attributes); 1472 return GetQualifiedName(dwarf2Data, cu, attributes, storage); 1473} 1474 1475const char *DWARFDebugInfoEntry::GetQualifiedName( 1476 SymbolFileDWARF *dwarf2Data, DWARFCompileUnit *cu, 1477 const DWARFAttributes &attributes, std::string &storage) const { 1478 1479 const char *name = GetName(dwarf2Data, cu); 1480 1481 if (name) { 1482 DWARFDIE parent_decl_ctx_die = GetParentDeclContextDIE(dwarf2Data, cu); 1483 storage.clear(); 1484 // TODO: change this to get the correct decl context parent.... 1485 while (parent_decl_ctx_die) { 1486 const dw_tag_t parent_tag = parent_decl_ctx_die.Tag(); 1487 switch (parent_tag) { 1488 case DW_TAG_namespace: { 1489 const char *namespace_name = parent_decl_ctx_die.GetName(); 1490 if (namespace_name) { 1491 storage.insert(0, "::"); 1492 storage.insert(0, namespace_name); 1493 } else { 1494 storage.insert(0, "(anonymous namespace)::"); 1495 } 1496 parent_decl_ctx_die = parent_decl_ctx_die.GetParentDeclContextDIE(); 1497 } break; 1498 1499 case DW_TAG_class_type: 1500 case DW_TAG_structure_type: 1501 case DW_TAG_union_type: { 1502 const char *class_union_struct_name = parent_decl_ctx_die.GetName(); 1503 1504 if (class_union_struct_name) { 1505 storage.insert(0, "::"); 1506 storage.insert(0, class_union_struct_name); 1507 } 1508 parent_decl_ctx_die = parent_decl_ctx_die.GetParentDeclContextDIE(); 1509 } break; 1510 1511 default: 1512 parent_decl_ctx_die.Clear(); 1513 break; 1514 } 1515 } 1516 1517 if (storage.empty()) 1518 storage.append("::"); 1519 1520 storage.append(name); 1521 } 1522 if (storage.empty()) 1523 return NULL; 1524 return storage.c_str(); 1525} 1526 1527//---------------------------------------------------------------------- 1528// LookupAddress 1529//---------------------------------------------------------------------- 1530bool DWARFDebugInfoEntry::LookupAddress(const dw_addr_t address, 1531 SymbolFileDWARF *dwarf2Data, 1532 const DWARFCompileUnit *cu, 1533 DWARFDebugInfoEntry **function_die, 1534 DWARFDebugInfoEntry **block_die) { 1535 bool found_address = false; 1536 if (m_tag) { 1537 bool check_children = false; 1538 bool match_addr_range = false; 1539 // printf("0x%8.8x: %30s: address = 0x%8.8x - ", m_offset, 1540 // DW_TAG_value_to_name(tag), address); 1541 switch (m_tag) { 1542 case DW_TAG_array_type: 1543 break; 1544 case DW_TAG_class_type: 1545 check_children = true; 1546 break; 1547 case DW_TAG_entry_point: 1548 break; 1549 case DW_TAG_enumeration_type: 1550 break; 1551 case DW_TAG_formal_parameter: 1552 break; 1553 case DW_TAG_imported_declaration: 1554 break; 1555 case DW_TAG_label: 1556 break; 1557 case DW_TAG_lexical_block: 1558 check_children = true; 1559 match_addr_range = true; 1560 break; 1561 case DW_TAG_member: 1562 break; 1563 case DW_TAG_pointer_type: 1564 break; 1565 case DW_TAG_reference_type: 1566 break; 1567 case DW_TAG_compile_unit: 1568 match_addr_range = true; 1569 break; 1570 case DW_TAG_string_type: 1571 break; 1572 case DW_TAG_structure_type: 1573 check_children = true; 1574 break; 1575 case DW_TAG_subroutine_type: 1576 break; 1577 case DW_TAG_typedef: 1578 break; 1579 case DW_TAG_union_type: 1580 break; 1581 case DW_TAG_unspecified_parameters: 1582 break; 1583 case DW_TAG_variant: 1584 break; 1585 case DW_TAG_common_block: 1586 check_children = true; 1587 break; 1588 case DW_TAG_common_inclusion: 1589 break; 1590 case DW_TAG_inheritance: 1591 break; 1592 case DW_TAG_inlined_subroutine: 1593 check_children = true; 1594 match_addr_range = true; 1595 break; 1596 case DW_TAG_module: 1597 match_addr_range = true; 1598 break; 1599 case DW_TAG_ptr_to_member_type: 1600 break; 1601 case DW_TAG_set_type: 1602 break; 1603 case DW_TAG_subrange_type: 1604 break; 1605 case DW_TAG_with_stmt: 1606 break; 1607 case DW_TAG_access_declaration: 1608 break; 1609 case DW_TAG_base_type: 1610 break; 1611 case DW_TAG_catch_block: 1612 match_addr_range = true; 1613 break; 1614 case DW_TAG_const_type: 1615 break; 1616 case DW_TAG_constant: 1617 break; 1618 case DW_TAG_enumerator: 1619 break; 1620 case DW_TAG_file_type: 1621 break; 1622 case DW_TAG_friend: 1623 break; 1624 case DW_TAG_namelist: 1625 break; 1626 case DW_TAG_namelist_item: 1627 break; 1628 case DW_TAG_packed_type: 1629 break; 1630 case DW_TAG_subprogram: 1631 match_addr_range = true; 1632 break; 1633 case DW_TAG_template_type_parameter: 1634 break; 1635 case DW_TAG_template_value_parameter: 1636 break; 1637 case DW_TAG_GNU_template_parameter_pack: 1638 break; 1639 case DW_TAG_thrown_type: 1640 break; 1641 case DW_TAG_try_block: 1642 match_addr_range = true; 1643 break; 1644 case DW_TAG_variant_part: 1645 break; 1646 case DW_TAG_variable: 1647 break; 1648 case DW_TAG_volatile_type: 1649 break; 1650 case DW_TAG_dwarf_procedure: 1651 break; 1652 case DW_TAG_restrict_type: 1653 break; 1654 case DW_TAG_interface_type: 1655 break; 1656 case DW_TAG_namespace: 1657 check_children = true; 1658 break; 1659 case DW_TAG_imported_module: 1660 break; 1661 case DW_TAG_unspecified_type: 1662 break; 1663 case DW_TAG_partial_unit: 1664 break; 1665 case DW_TAG_imported_unit: 1666 break; 1667 case DW_TAG_shared_type: 1668 break; 1669 default: 1670 break; 1671 } 1672 1673 if (match_addr_range) { 1674 dw_addr_t lo_pc = GetAttributeValueAsAddress(dwarf2Data, cu, DW_AT_low_pc, 1675 LLDB_INVALID_ADDRESS); 1676 if (lo_pc != LLDB_INVALID_ADDRESS) { 1677 dw_addr_t hi_pc = 1678 GetAttributeHighPC(dwarf2Data, cu, lo_pc, LLDB_INVALID_ADDRESS); 1679 if (hi_pc != LLDB_INVALID_ADDRESS) { 1680 // printf("\n0x%8.8x: %30s: address = 0x%8.8x [0x%8.8x - 0x%8.8x) ", 1681 // m_offset, DW_TAG_value_to_name(tag), address, lo_pc, hi_pc); 1682 if ((lo_pc <= address) && (address < hi_pc)) { 1683 found_address = true; 1684 // puts("***MATCH***"); 1685 switch (m_tag) { 1686 case DW_TAG_compile_unit: // File 1687 check_children = ((function_die != NULL) || (block_die != NULL)); 1688 break; 1689 1690 case DW_TAG_subprogram: // Function 1691 if (function_die) 1692 *function_die = this; 1693 check_children = (block_die != NULL); 1694 break; 1695 1696 case DW_TAG_inlined_subroutine: // Inlined Function 1697 case DW_TAG_lexical_block: // Block { } in code 1698 if (block_die) { 1699 *block_die = this; 1700 check_children = true; 1701 } 1702 break; 1703 1704 default: 1705 check_children = true; 1706 break; 1707 } 1708 } 1709 } else { // compile units may not have a valid high/low pc when there 1710 // are address gaps in subroutines so we must always search 1711 // if there is no valid high and low PC 1712 check_children = (m_tag == DW_TAG_compile_unit) && 1713 ((function_die != NULL) || (block_die != NULL)); 1714 } 1715 } else { 1716 dw_offset_t debug_ranges_offset = GetAttributeValueAsUnsigned( 1717 dwarf2Data, cu, DW_AT_ranges, DW_INVALID_OFFSET); 1718 if (debug_ranges_offset != DW_INVALID_OFFSET) { 1719 DWARFRangeList ranges; 1720 DWARFDebugRanges *debug_ranges = dwarf2Data->DebugRanges(); 1721 debug_ranges->FindRanges(cu->GetRangesBase(), debug_ranges_offset, ranges); 1722 // All DW_AT_ranges are relative to the base address of the 1723 // compile unit. We add the compile unit base address to make 1724 // sure all the addresses are properly fixed up. 1725 ranges.Slide(cu->GetBaseAddress()); 1726 if (ranges.FindEntryThatContains(address)) { 1727 found_address = true; 1728 // puts("***MATCH***"); 1729 switch (m_tag) { 1730 case DW_TAG_compile_unit: // File 1731 check_children = ((function_die != NULL) || (block_die != NULL)); 1732 break; 1733 1734 case DW_TAG_subprogram: // Function 1735 if (function_die) 1736 *function_die = this; 1737 check_children = (block_die != NULL); 1738 break; 1739 1740 case DW_TAG_inlined_subroutine: // Inlined Function 1741 case DW_TAG_lexical_block: // Block { } in code 1742 if (block_die) { 1743 *block_die = this; 1744 check_children = true; 1745 } 1746 break; 1747 1748 default: 1749 check_children = true; 1750 break; 1751 } 1752 } else { 1753 check_children = false; 1754 } 1755 } 1756 } 1757 } 1758 1759 if (check_children) { 1760 // printf("checking children\n"); 1761 DWARFDebugInfoEntry *child = GetFirstChild(); 1762 while (child) { 1763 if (child->LookupAddress(address, dwarf2Data, cu, function_die, 1764 block_die)) 1765 return true; 1766 child = child->GetSibling(); 1767 } 1768 } 1769 } 1770 return found_address; 1771} 1772 1773const DWARFAbbreviationDeclaration * 1774DWARFDebugInfoEntry::GetAbbreviationDeclarationPtr( 1775 SymbolFileDWARF *dwarf2Data, const DWARFCompileUnit *cu, 1776 lldb::offset_t &offset) const { 1777 if (dwarf2Data) { 1778 offset = GetOffset(); 1779 1780 const DWARFAbbreviationDeclarationSet *abbrev_set = cu->GetAbbreviations(); 1781 if (abbrev_set) { 1782 const DWARFAbbreviationDeclaration *abbrev_decl = 1783 abbrev_set->GetAbbreviationDeclaration(m_abbr_idx); 1784 if (abbrev_decl) { 1785 // Make sure the abbreviation code still matches. If it doesn't and 1786 // the DWARF data was mmap'ed, the backing file might have been modified 1787 // which is bad news. 1788 const uint64_t abbrev_code = 1789 dwarf2Data->get_debug_info_data().GetULEB128(&offset); 1790 1791 if (abbrev_decl->Code() == abbrev_code) 1792 return abbrev_decl; 1793 1794 dwarf2Data->GetObjectFile()->GetModule()->ReportErrorIfModifyDetected( 1795 "0x%8.8x: the DWARF debug information has been modified (abbrev " 1796 "code was %u, and is now %u)", 1797 GetOffset(), (uint32_t)abbrev_decl->Code(), (uint32_t)abbrev_code); 1798 } 1799 } 1800 } 1801 offset = DW_INVALID_OFFSET; 1802 return NULL; 1803} 1804 1805bool DWARFDebugInfoEntry::OffsetLessThan(const DWARFDebugInfoEntry &a, 1806 const DWARFDebugInfoEntry &b) { 1807 return a.GetOffset() < b.GetOffset(); 1808} 1809 1810void DWARFDebugInfoEntry::DumpDIECollection( 1811 Stream &strm, DWARFDebugInfoEntry::collection &die_collection) { 1812 DWARFDebugInfoEntry::const_iterator pos; 1813 DWARFDebugInfoEntry::const_iterator end = die_collection.end(); 1814 strm.PutCString("\noffset parent sibling child\n"); 1815 strm.PutCString("-------- -------- -------- --------\n"); 1816 for (pos = die_collection.begin(); pos != end; ++pos) { 1817 const DWARFDebugInfoEntry &die_ref = *pos; 1818 const DWARFDebugInfoEntry *p = die_ref.GetParent(); 1819 const DWARFDebugInfoEntry *s = die_ref.GetSibling(); 1820 const DWARFDebugInfoEntry *c = die_ref.GetFirstChild(); 1821 strm.Printf("%.8x: %.8x %.8x %.8x 0x%4.4x %s%s\n", die_ref.GetOffset(), 1822 p ? p->GetOffset() : 0, s ? s->GetOffset() : 0, 1823 c ? c->GetOffset() : 0, die_ref.Tag(), 1824 DW_TAG_value_to_name(die_ref.Tag()), 1825 die_ref.HasChildren() ? " *" : ""); 1826 } 1827} 1828