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/Stream.h" 17 #include "lldb/Expression/DWARFExpression.h" 18 #include "lldb/Symbol/ObjectFile.h" 19 20 #include "DWARFCompileUnit.h" 21 #include "SymbolFileDWARF.h" 22 #include "DWARFDebugAbbrev.h" 23 #include "DWARFDebugAranges.h" 24 #include "DWARFDebugInfo.h" 25 #include "DWARFDIECollection.h" 26 #include "DWARFFormValue.h" 27 #include "DWARFLocationDescription.h" 28 #include "DWARFLocationList.h" 29 #include "DWARFDebugRanges.h" 30 31 using namespace lldb_private; 32 using namespace std; 33 extern int g_verbose; 34 35 36 37 DWARFDebugInfoEntry::Attributes::Attributes() : 38 m_infos() 39 { 40 } 41 42 DWARFDebugInfoEntry::Attributes::~Attributes() 43 { 44 } 45 46 47 uint32_t 48 DWARFDebugInfoEntry::Attributes::FindAttributeIndex(dw_attr_t attr) const 49 { 50 collection::const_iterator end = m_infos.end(); 51 collection::const_iterator beg = m_infos.begin(); 52 collection::const_iterator pos; 53 for (pos = beg; pos != end; ++pos) 54 { 55 if (pos->attr == attr) 56 return std::distance(beg, pos); 57 } 58 return UINT32_MAX; 59 } 60 61 void 62 DWARFDebugInfoEntry::Attributes::Append(const DWARFCompileUnit *cu, dw_offset_t attr_die_offset, dw_attr_t attr, dw_form_t form) 63 { 64 Info info = { cu, attr_die_offset, attr, form }; 65 m_infos.push_back(info); 66 } 67 68 bool 69 DWARFDebugInfoEntry::Attributes::ContainsAttribute(dw_attr_t attr) const 70 { 71 return FindAttributeIndex(attr) != UINT32_MAX; 72 } 73 74 bool 75 DWARFDebugInfoEntry::Attributes::RemoveAttribute(dw_attr_t attr) 76 { 77 uint32_t attr_index = FindAttributeIndex(attr); 78 if (attr_index != UINT32_MAX) 79 { 80 m_infos.erase(m_infos.begin() + attr_index); 81 return true; 82 } 83 return false; 84 } 85 86 bool 87 DWARFDebugInfoEntry::Attributes::ExtractFormValueAtIndex (SymbolFileDWARF* dwarf2Data, uint32_t i, DWARFFormValue &form_value) const 88 { 89 form_value.SetForm(FormAtIndex(i)); 90 dw_offset_t offset = DIEOffsetAtIndex(i); 91 return form_value.ExtractValue(dwarf2Data->get_debug_info_data(), &offset, CompileUnitAtIndex(i)); 92 } 93 94 uint64_t 95 DWARFDebugInfoEntry::Attributes::FormValueAsUnsignedAtIndex(SymbolFileDWARF* dwarf2Data, uint32_t i, uint64_t fail_value) const 96 { 97 DWARFFormValue form_value; 98 if (ExtractFormValueAtIndex(dwarf2Data, i, form_value)) 99 return form_value.Reference(CompileUnitAtIndex(i)); 100 return fail_value; 101 } 102 103 104 105 bool 106 DWARFDebugInfoEntry::FastExtract 107 ( 108 const DataExtractor& debug_info_data, 109 const DWARFCompileUnit* cu, 110 const uint8_t *fixed_form_sizes, 111 uint32_t* offset_ptr 112 ) 113 { 114 m_offset = *offset_ptr; 115 116 dw_uleb128_t abbrCode = debug_info_data.GetULEB128 (offset_ptr); 117 118 assert (fixed_form_sizes); // For best performance this should be specified! 119 120 if (abbrCode) 121 { 122 uint32_t offset = *offset_ptr; 123 124 m_abbrevDecl = cu->GetAbbreviations()->GetAbbreviationDeclaration(abbrCode); 125 126 // Skip all data in the .debug_info for the attributes 127 const uint32_t numAttributes = m_abbrevDecl->NumAttributes(); 128 register uint32_t i; 129 register dw_form_t form; 130 for (i=0; i<numAttributes; ++i) 131 { 132 form = m_abbrevDecl->GetFormByIndexUnchecked(i); 133 134 const uint8_t fixed_skip_size = fixed_form_sizes [form]; 135 if (fixed_skip_size) 136 offset += fixed_skip_size; 137 else 138 { 139 bool form_is_indirect = false; 140 do 141 { 142 form_is_indirect = false; 143 register uint32_t form_size = 0; 144 switch (form) 145 { 146 // Blocks if inlined data that have a length field and the data bytes 147 // inlined in the .debug_info 148 case DW_FORM_block : form_size = debug_info_data.GetULEB128 (&offset); break; 149 case DW_FORM_block1 : form_size = debug_info_data.GetU8_unchecked (&offset); break; 150 case DW_FORM_block2 : form_size = debug_info_data.GetU16_unchecked (&offset);break; 151 case DW_FORM_block4 : form_size = debug_info_data.GetU32_unchecked (&offset);break; 152 153 // Inlined NULL terminated C-strings 154 case DW_FORM_string : 155 debug_info_data.GetCStr (&offset); 156 break; 157 158 // Compile unit address sized values 159 case DW_FORM_addr : 160 case DW_FORM_ref_addr : 161 form_size = cu->GetAddressByteSize(); 162 break; 163 164 // 1 byte values 165 case DW_FORM_data1 : 166 case DW_FORM_flag : 167 case DW_FORM_ref1 : 168 form_size = 1; 169 break; 170 171 // 2 byte values 172 case DW_FORM_data2 : 173 case DW_FORM_ref2 : 174 form_size = 2; 175 break; 176 177 // 4 byte values 178 case DW_FORM_strp : 179 case DW_FORM_data4 : 180 case DW_FORM_ref4 : 181 form_size = 4; 182 break; 183 184 // 8 byte values 185 case DW_FORM_data8 : 186 case DW_FORM_ref8 : 187 form_size = 8; 188 break; 189 190 // signed or unsigned LEB 128 values 191 case DW_FORM_sdata : 192 case DW_FORM_udata : 193 case DW_FORM_ref_udata : 194 debug_info_data.Skip_LEB128 (&offset); 195 break; 196 197 case DW_FORM_indirect : 198 form_is_indirect = true; 199 form = debug_info_data.GetULEB128 (&offset); 200 break; 201 202 default: 203 *offset_ptr = m_offset; 204 return false; 205 } 206 offset += form_size; 207 208 } while (form_is_indirect); 209 } 210 } 211 *offset_ptr = offset; 212 return true; 213 } 214 else 215 { 216 m_abbrevDecl = NULL; 217 return true; // NULL debug tag entry 218 } 219 220 return false; 221 } 222 223 //---------------------------------------------------------------------- 224 // Extract 225 // 226 // Extract a debug info entry for a given compile unit from the 227 // .debug_info and .debug_abbrev data within the SymbolFileDWARF class 228 // starting at the given offset 229 //---------------------------------------------------------------------- 230 bool 231 DWARFDebugInfoEntry::Extract 232 ( 233 SymbolFileDWARF* dwarf2Data, 234 const DWARFCompileUnit* cu, 235 uint32_t* offset_ptr 236 ) 237 { 238 const DataExtractor& debug_info_data = dwarf2Data->get_debug_info_data(); 239 // const DataExtractor& debug_str_data = dwarf2Data->get_debug_str_data(); 240 const uint32_t cu_end_offset = cu->GetNextCompileUnitOffset(); 241 const uint8_t cu_addr_size = cu->GetAddressByteSize(); 242 uint32_t offset = *offset_ptr; 243 // if (offset >= cu_end_offset) 244 // Log::Error("DIE at offset 0x%8.8x is beyond the end of the current compile unit (0x%8.8x)", m_offset, cu_end_offset); 245 if ((offset < cu_end_offset) && debug_info_data.ValidOffset(offset)) 246 { 247 m_offset = offset; 248 249 dw_uleb128_t abbrCode = debug_info_data.GetULEB128(&offset); 250 251 if (abbrCode) 252 { 253 m_abbrevDecl = cu->GetAbbreviations()->GetAbbreviationDeclaration(abbrCode); 254 255 if (m_abbrevDecl) 256 { 257 dw_tag_t tag = m_abbrevDecl->Tag(); 258 259 bool isCompileUnitTag = tag == DW_TAG_compile_unit; 260 if (cu && isCompileUnitTag) 261 ((DWARFCompileUnit*)cu)->SetBaseAddress(0); 262 263 // Skip all data in the .debug_info for the attributes 264 const uint32_t numAttributes = m_abbrevDecl->NumAttributes(); 265 uint32_t i; 266 dw_attr_t attr; 267 dw_form_t form; 268 for (i=0; i<numAttributes; ++i) 269 { 270 m_abbrevDecl->GetAttrAndFormByIndexUnchecked(i, attr, form); 271 272 if (isCompileUnitTag && ((attr == DW_AT_entry_pc) || (attr == DW_AT_low_pc))) 273 { 274 DWARFFormValue form_value(form); 275 if (form_value.ExtractValue(debug_info_data, &offset, cu)) 276 { 277 if (attr == DW_AT_low_pc || attr == DW_AT_entry_pc) 278 ((DWARFCompileUnit*)cu)->SetBaseAddress(form_value.Unsigned()); 279 } 280 } 281 else 282 { 283 bool form_is_indirect = false; 284 do 285 { 286 form_is_indirect = false; 287 register uint32_t form_size = 0; 288 switch (form) 289 { 290 // Blocks if inlined data that have a length field and the data bytes 291 // inlined in the .debug_info 292 case DW_FORM_block : form_size = debug_info_data.GetULEB128(&offset); break; 293 case DW_FORM_block1 : form_size = debug_info_data.GetU8(&offset); break; 294 case DW_FORM_block2 : form_size = debug_info_data.GetU16(&offset); break; 295 case DW_FORM_block4 : form_size = debug_info_data.GetU32(&offset); break; 296 297 // Inlined NULL terminated C-strings 298 case DW_FORM_string : debug_info_data.GetCStr(&offset); break; 299 300 // Compile unit address sized values 301 case DW_FORM_addr : 302 case DW_FORM_ref_addr : 303 form_size = cu_addr_size; 304 break; 305 306 // 1 byte values 307 case DW_FORM_data1 : 308 case DW_FORM_flag : 309 case DW_FORM_ref1 : 310 form_size = 1; 311 break; 312 313 // 2 byte values 314 case DW_FORM_data2 : 315 case DW_FORM_ref2 : 316 form_size = 2; 317 break; 318 319 // 4 byte values 320 case DW_FORM_strp : 321 form_size = 4; 322 break; 323 324 case DW_FORM_data4 : 325 case DW_FORM_ref4 : 326 form_size = 4; 327 break; 328 329 // 8 byte values 330 case DW_FORM_data8 : 331 case DW_FORM_ref8 : 332 form_size = 8; 333 break; 334 335 // signed or unsigned LEB 128 values 336 case DW_FORM_sdata : 337 case DW_FORM_udata : 338 case DW_FORM_ref_udata : 339 debug_info_data.Skip_LEB128(&offset); 340 break; 341 342 case DW_FORM_indirect : 343 form = debug_info_data.GetULEB128(&offset); 344 form_is_indirect = true; 345 break; 346 347 default: 348 *offset_ptr = offset; 349 return false; 350 } 351 352 offset += form_size; 353 } while (form_is_indirect); 354 } 355 } 356 *offset_ptr = offset; 357 return true; 358 } 359 } 360 else 361 { 362 m_abbrevDecl = NULL; 363 *offset_ptr = offset; 364 return true; // NULL debug tag entry 365 } 366 } 367 368 return false; 369 } 370 371 //---------------------------------------------------------------------- 372 // AppendDependentDIES() 373 //---------------------------------------------------------------------- 374 bool 375 DWARFDebugInfoEntry::AppendDependentDIES 376 ( 377 SymbolFileDWARF* dwarf2Data, 378 const DWARFCompileUnit* cu, 379 const bool add_children, 380 DWARFDIECollection& dependent_dies 381 ) const 382 { 383 // Add this object's DIE offset 384 // The line below is the only place that should add a die to the 385 // dependent_dies collection as we have to be careful of recursion! 386 if ( !dependent_dies.Insert(this) ) 387 return false; // This DIE already exists in the collection, nothing to do! 388 389 //DEBUG_PRINTF(" dependent_dies.Insert(0x%8.8x)\n", GetOffset());/// 390 391 if (m_abbrevDecl) 392 { 393 // Keep adding parent DIE offsets as long as the offsets do not 394 // already exist in the collection 395 const DWARFDebugInfoEntry* die = GetParent(); 396 while ( die && die->AppendDependentDIES(dwarf2Data, cu, false, dependent_dies) ) 397 die = die->GetParent(); 398 399 bool add_non_subprogram_children = false; 400 bool add_children_override = false; 401 402 if (!add_children) 403 { 404 switch (m_abbrevDecl->Tag()) 405 { 406 case DW_TAG_array_type: break; 407 case DW_TAG_class_type: add_non_subprogram_children = true; break; 408 case DW_TAG_entry_point: break; 409 case DW_TAG_enumeration_type: break; 410 case DW_TAG_formal_parameter: break; 411 case DW_TAG_imported_declaration: break; 412 case DW_TAG_label: break; 413 case DW_TAG_lexical_block: add_children_override = true; break; 414 case DW_TAG_member: break; 415 case DW_TAG_pointer_type: break; 416 case DW_TAG_reference_type: break; 417 case DW_TAG_compile_unit: break; 418 case DW_TAG_string_type: break; 419 case DW_TAG_structure_type: add_non_subprogram_children = true; break; 420 case DW_TAG_subroutine_type: add_children_override = true; break; 421 case DW_TAG_typedef: break; 422 case DW_TAG_union_type: add_non_subprogram_children = true; break; 423 case DW_TAG_unspecified_parameters: break; 424 case DW_TAG_variant: break; 425 case DW_TAG_common_block: break; 426 case DW_TAG_common_inclusion: break; 427 case DW_TAG_inheritance: break; 428 case DW_TAG_inlined_subroutine: break; 429 case DW_TAG_module: break; 430 case DW_TAG_ptr_to_member_type: break; 431 case DW_TAG_set_type: break; 432 case DW_TAG_subrange_type: break; 433 case DW_TAG_with_stmt: break; 434 case DW_TAG_access_declaration: break; 435 case DW_TAG_base_type: break; 436 case DW_TAG_catch_block: break; 437 case DW_TAG_const_type: break; 438 case DW_TAG_constant: break; 439 case DW_TAG_enumerator: break; 440 case DW_TAG_file_type: break; 441 case DW_TAG_friend: break; 442 case DW_TAG_namelist: break; 443 case DW_TAG_namelist_item: break; 444 case DW_TAG_packed_type: break; 445 case DW_TAG_subprogram: add_children_override = true; break; 446 case DW_TAG_template_type_parameter: break; 447 case DW_TAG_template_value_parameter: break; 448 case DW_TAG_thrown_type: break; 449 case DW_TAG_try_block: break; 450 case DW_TAG_variant_part: break; 451 case DW_TAG_variable: break; 452 case DW_TAG_volatile_type: break; 453 case DW_TAG_dwarf_procedure: break; 454 case DW_TAG_restrict_type: break; 455 case DW_TAG_interface_type: break; 456 case DW_TAG_namespace: break; 457 case DW_TAG_imported_module: break; 458 case DW_TAG_unspecified_type: break; 459 case DW_TAG_partial_unit: break; 460 case DW_TAG_imported_unit: break; 461 case DW_TAG_shared_type: break; 462 } 463 } 464 const DataExtractor& debug_info_data = dwarf2Data->get_debug_info_data(); 465 466 // Dump all data in the .debug_info for the attributes 467 const uint32_t numAttributes = m_abbrevDecl->NumAttributes(); 468 uint32_t i; 469 dw_offset_t offset = GetOffset(); 470 debug_info_data.Skip_LEB128(&offset); // Skip abbreviation code 471 472 dw_attr_t attr; 473 dw_form_t form; 474 for (i=0; i<numAttributes; ++i) 475 { 476 m_abbrevDecl->GetAttrAndFormByIndexUnchecked(i, attr, form); 477 DWARFFormValue form_value(form); 478 479 switch (attr) 480 { 481 // All cases that use refer to another DIE should use this case 482 // without 483 // having to check the FORM of the attribute to tell if it refers to another 484 // DIE 485 case DW_AT_abstract_origin: 486 case DW_AT_import: 487 case DW_AT_discr: 488 case DW_AT_containing_type: 489 case DW_AT_base_types: 490 case DW_AT_friend: 491 case DW_AT_specification: 492 case DW_AT_type: 493 case DW_AT_common_reference: 494 case DW_AT_default_value: 495 { 496 form_value.ExtractValue(debug_info_data, &offset, cu); 497 DWARFCompileUnitSP cu_sp_ptr; 498 const DWARFDebugInfoEntry* ref_die = const_cast<SymbolFileDWARF*>(dwarf2Data)->DebugInfo()->GetDIEPtr(form_value.Reference(cu), &cu_sp_ptr); 499 if (ref_die) 500 ref_die->AppendDependentDIES(dwarf2Data, cu_sp_ptr.get(), true, dependent_dies); 501 } 502 break; 503 504 default: 505 if (attr != DW_AT_sibling) 506 { 507 switch (form_value.Form()) 508 { 509 case DW_FORM_ref_addr: 510 case DW_FORM_ref1: 511 case DW_FORM_ref2: 512 case DW_FORM_ref4: 513 case DW_FORM_ref8: 514 case DW_FORM_ref_udata: 515 // Log::WarningVerbose("DWARFDebugInfoEntry::AppendDependentDIES() -- check on this item %s: attr = %s form = %s", 516 // DW_TAG_value_to_name(m_abbrevDecl->Tag()), 517 // DW_AT_value_to_name(attr), 518 // DW_FORM_value_to_name(form)); 519 break; 520 } 521 } 522 form_value.SkipValue(debug_info_data, &offset, cu); 523 break; 524 } 525 } 526 527 if (m_abbrevDecl->HasChildren()) 528 { 529 const DWARFDebugInfoEntry* child; 530 for (child = GetFirstChild(); child != NULL; child = child->GetSibling()) 531 { 532 bool add = add_children || add_children_override; 533 534 if (!add) 535 { 536 if (add_non_subprogram_children) 537 { 538 // add_non_subprogram_children is used for classes and structs 539 // that may contain children that are the member variables that 540 // may have functions as children and whom may add the class or 541 // struct by adding their parent. We don't want to add any 542 // functions though since they may have been optimized out. But 543 // we do need to watch for declarations and keep them. 544 if (child->Tag() == DW_TAG_subprogram) 545 { 546 // Check if this subprogram TAG had a DW_AT_declaration attribute set to 1. 547 // If so we need to include this DIE so that we always have a complete view 548 // of a class definition so debuggers can track down any weak symbols that 549 // may not have had weak definition entries. 550 if (child->GetAttributeValueAsUnsigned(dwarf2Data, cu, DW_AT_declaration, 0) == 1) 551 add = true; 552 } 553 else 554 { 555 // Add all other items inside a class/struct 556 add = true; 557 } 558 } 559 else 560 { 561 // We don't need to add this child, only add it if it's a NULL tag 562 add = child->IsNULL(); 563 } 564 } 565 566 if (add) 567 child->AppendDependentDIES(dwarf2Data, cu, true, dependent_dies); 568 } 569 } 570 } 571 return true; 572 } 573 574 //---------------------------------------------------------------------- 575 // DumpAncestry 576 // 577 // Dumps all of a debug information entries parents up until oldest and 578 // all of it's attributes to the specified stream. 579 //---------------------------------------------------------------------- 580 void 581 DWARFDebugInfoEntry::DumpAncestry 582 ( 583 SymbolFileDWARF* dwarf2Data, 584 const DWARFCompileUnit* cu, 585 const DWARFDebugInfoEntry* oldest, 586 Stream *s, 587 uint32_t recurse_depth 588 ) const 589 { 590 const DWARFDebugInfoEntry* parent = GetParent(); 591 if (parent && parent != oldest) 592 parent->DumpAncestry(dwarf2Data, cu, oldest, s, 0); 593 Dump(dwarf2Data, cu, s, recurse_depth); 594 } 595 596 //---------------------------------------------------------------------- 597 // Compare two DIE by comparing all their attributes values, and 598 // following all DW_FORM_ref attributes and comparing their contents as 599 // well (except for DW_AT_sibling attributes. 600 // 601 // DWARFDebugInfoEntry::CompareState compare_state; 602 // int result = DWARFDebugInfoEntry::Compare(this, 0x00017ccb, 0x0001eb2b, compare_state, false, true); 603 //---------------------------------------------------------------------- 604 //int 605 //DWARFDebugInfoEntry::Compare 606 //( 607 // SymbolFileDWARF* dwarf2Data, 608 // dw_offset_t a_die_offset, 609 // dw_offset_t b_die_offset, 610 // CompareState &compare_state, 611 // bool compare_siblings, 612 // bool compare_children 613 //) 614 //{ 615 // if (a_die_offset == b_die_offset) 616 // return 0; 617 // 618 // DWARFCompileUnitSP a_cu_sp; 619 // DWARFCompileUnitSP b_cu_sp; 620 // const DWARFDebugInfoEntry* a_die = dwarf2Data->DebugInfo()->GetDIEPtr(a_die_offset, &a_cu_sp); 621 // const DWARFDebugInfoEntry* b_die = dwarf2Data->DebugInfo()->GetDIEPtr(b_die_offset, &b_cu_sp); 622 // 623 // return Compare(dwarf2Data, a_cu_sp.get(), a_die, b_cu_sp.get(), b_die, compare_state, compare_siblings, compare_children); 624 //} 625 // 626 //int 627 //DWARFDebugInfoEntry::Compare 628 //( 629 // SymbolFileDWARF* dwarf2Data, 630 // DWARFCompileUnit* a_cu, const DWARFDebugInfoEntry* a_die, 631 // DWARFCompileUnit* b_cu, const DWARFDebugInfoEntry* b_die, 632 // CompareState &compare_state, 633 // bool compare_siblings, 634 // bool compare_children 635 //) 636 //{ 637 // if (a_die == b_die) 638 // return 0; 639 // 640 // if (!compare_state.AddTypePair(a_die->GetOffset(), b_die->GetOffset())) 641 // { 642 // // We are already comparing both of these types, so let 643 // // compares complete for the real result 644 // return 0; 645 // } 646 // 647 // //printf("DWARFDebugInfoEntry::Compare(0x%8.8x, 0x%8.8x)\n", a_die->GetOffset(), b_die->GetOffset()); 648 // 649 // // Do we have two valid DIEs? 650 // if (a_die && b_die) 651 // { 652 // // Both DIE are valid 653 // int result = 0; 654 // 655 // const dw_tag_t a_tag = a_die->Tag(); 656 // const dw_tag_t b_tag = b_die->Tag(); 657 // if (a_tag == 0 && b_tag == 0) 658 // return 0; 659 // 660 // //printf(" comparing tags: %s and %s\n", DW_TAG_value_to_name(a_tag), DW_TAG_value_to_name(b_tag)); 661 // 662 // if (a_tag < b_tag) 663 // return -1; 664 // else if (a_tag > b_tag) 665 // return 1; 666 // 667 // DWARFDebugInfoEntry::Attributes a_attrs; 668 // DWARFDebugInfoEntry::Attributes b_attrs; 669 // size_t a_attr_count = a_die->GetAttributes(dwarf2Data, a_cu, a_attrs); 670 // size_t b_attr_count = b_die->GetAttributes(dwarf2Data, b_cu, b_attrs); 671 // if (a_attr_count != b_attr_count) 672 // { 673 // a_attrs.RemoveAttribute(DW_AT_sibling); 674 // b_attrs.RemoveAttribute(DW_AT_sibling); 675 // } 676 // 677 // a_attr_count = a_attrs.Size(); 678 // b_attr_count = b_attrs.Size(); 679 // 680 // DWARFFormValue a_form_value; 681 // DWARFFormValue b_form_value; 682 // 683 // if (a_attr_count != b_attr_count) 684 // { 685 // uint32_t is_decl_index = a_attrs.FindAttributeIndex(DW_AT_declaration); 686 // uint32_t a_name_index = UINT32_MAX; 687 // uint32_t b_name_index = UINT32_MAX; 688 // if (is_decl_index != UINT32_MAX) 689 // { 690 // if (a_attr_count == 2) 691 // { 692 // a_name_index = a_attrs.FindAttributeIndex(DW_AT_name); 693 // b_name_index = b_attrs.FindAttributeIndex(DW_AT_name); 694 // } 695 // } 696 // else 697 // { 698 // is_decl_index = b_attrs.FindAttributeIndex(DW_AT_declaration); 699 // if (is_decl_index != UINT32_MAX && a_attr_count == 2) 700 // { 701 // a_name_index = a_attrs.FindAttributeIndex(DW_AT_name); 702 // b_name_index = b_attrs.FindAttributeIndex(DW_AT_name); 703 // } 704 // } 705 // if (a_name_index != UINT32_MAX && b_name_index != UINT32_MAX) 706 // { 707 // if (a_attrs.ExtractFormValueAtIndex(dwarf2Data, a_name_index, a_form_value) && 708 // b_attrs.ExtractFormValueAtIndex(dwarf2Data, b_name_index, b_form_value)) 709 // { 710 // result = DWARFFormValue::Compare (a_form_value, b_form_value, a_cu, b_cu, &dwarf2Data->get_debug_str_data()); 711 // if (result == 0) 712 // { 713 // a_attr_count = b_attr_count = 0; 714 // compare_children = false; 715 // } 716 // } 717 // } 718 // } 719 // 720 // if (a_attr_count < b_attr_count) 721 // return -1; 722 // if (a_attr_count > b_attr_count) 723 // return 1; 724 // 725 // 726 // // The number of attributes are the same... 727 // if (a_attr_count > 0) 728 // { 729 // const DataExtractor* debug_str_data_ptr = &dwarf2Data->get_debug_str_data(); 730 // 731 // uint32_t i; 732 // for (i=0; i<a_attr_count; ++i) 733 // { 734 // const dw_attr_t a_attr = a_attrs.AttributeAtIndex(i); 735 // const dw_attr_t b_attr = b_attrs.AttributeAtIndex(i); 736 // //printf(" comparing attributes\n\t\t0x%8.8x: %s %s\t\t0x%8.8x: %s %s\n", 737 // // a_attrs.DIEOffsetAtIndex(i), DW_FORM_value_to_name(a_attrs.FormAtIndex(i)), DW_AT_value_to_name(a_attr), 738 // // b_attrs.DIEOffsetAtIndex(i), DW_FORM_value_to_name(b_attrs.FormAtIndex(i)), DW_AT_value_to_name(b_attr)); 739 // 740 // if (a_attr < b_attr) 741 // return -1; 742 // else if (a_attr > b_attr) 743 // return 1; 744 // 745 // switch (a_attr) 746 // { 747 // // Since we call a form of GetAttributes which inlines the 748 // // attributes from DW_AT_abstract_origin and DW_AT_specification 749 // // we don't care if their values mismatch... 750 // case DW_AT_abstract_origin: 751 // case DW_AT_specification: 752 // case DW_AT_sibling: 753 // case DW_AT_containing_type: 754 // //printf(" action = IGNORE\n"); 755 // result = 0; 756 // break; // ignore 757 // 758 // default: 759 // if (a_attrs.ExtractFormValueAtIndex(dwarf2Data, i, a_form_value) && 760 // b_attrs.ExtractFormValueAtIndex(dwarf2Data, i, b_form_value)) 761 // result = DWARFFormValue::Compare (a_form_value, b_form_value, a_cu, b_cu, debug_str_data_ptr); 762 // break; 763 // } 764 // 765 // //printf("\t result = %i\n", result); 766 // 767 // if (result != 0) 768 // { 769 // // Attributes weren't equal, lets see if we care? 770 // switch (a_attr) 771 // { 772 // case DW_AT_decl_file: 773 // // TODO: add the ability to compare files in two different compile units 774 // if (a_cu == b_cu) 775 // { 776 // //printf(" action = RETURN RESULT\n"); 777 // return result; // Only return the compare results when the compile units are the same and the decl_file attributes can be compared 778 // } 779 // else 780 // { 781 // result = 0; 782 // //printf(" action = IGNORE\n"); 783 // } 784 // break; 785 // 786 // default: 787 // switch (a_attrs.FormAtIndex(i)) 788 // { 789 // case DW_FORM_ref1: 790 // case DW_FORM_ref2: 791 // case DW_FORM_ref4: 792 // case DW_FORM_ref8: 793 // case DW_FORM_ref_udata: 794 // case DW_FORM_ref_addr: 795 // //printf(" action = COMPARE DIEs 0x%8.8x 0x%8.8x\n", (dw_offset_t)a_form_value.Reference(a_cu), (dw_offset_t)b_form_value.Reference(b_cu)); 796 // // These attribute values refer to other DIEs, so lets compare those instead of their DIE offsets... 797 // result = Compare(dwarf2Data, a_form_value.Reference(a_cu), b_form_value.Reference(b_cu), compare_state, false, true); 798 // if (result != 0) 799 // return result; 800 // break; 801 // 802 // default: 803 // // We do care that they were different, return this result... 804 // //printf(" action = RETURN RESULT\n"); 805 // return result; 806 // } 807 // } 808 // } 809 // } 810 // } 811 // //printf(" SUCCESS\n\t\t0x%8.8x: %s\n\t\t0x%8.8x: %s\n", a_die->GetOffset(), DW_TAG_value_to_name(a_tag), b_die->GetOffset(), DW_TAG_value_to_name(b_tag)); 812 // 813 // if (compare_children) 814 // { 815 // bool a_has_children = a_die->HasChildren(); 816 // bool b_has_children = b_die->HasChildren(); 817 // if (a_has_children == b_has_children) 818 // { 819 // // Both either have kids or don't 820 // if (a_has_children) 821 // result = Compare( dwarf2Data, 822 // a_cu, a_die->GetFirstChild(), 823 // b_cu, b_die->GetFirstChild(), 824 // compare_state, true, compare_children); 825 // else 826 // result = 0; 827 // } 828 // else if (!a_has_children) 829 // result = -1; // A doesn't have kids, but B does 830 // else 831 // result = 1; // A has kids, but B doesn't 832 // } 833 // 834 // if (compare_siblings) 835 // { 836 // result = Compare( dwarf2Data, 837 // a_cu, a_die->GetSibling(), 838 // b_cu, b_die->GetSibling(), 839 // compare_state, true, compare_children); 840 // } 841 // 842 // return result; 843 // } 844 // 845 // if (a_die == NULL) 846 // return -1; // a_die is NULL, yet b_die is non-NULL 847 // else 848 // return 1; // a_die is non-NULL, yet b_die is NULL 849 // 850 //} 851 // 852 // 853 //int 854 //DWARFDebugInfoEntry::Compare 855 //( 856 // SymbolFileDWARF* dwarf2Data, 857 // const DWARFCompileUnit* cu_a, 858 // const DWARFDebugInfoEntry* die_a, 859 // const DWARFCompileUnit* cu_a, 860 // const DWARFDebugInfoEntry* die_b, 861 // CompareState &compare_state 862 //) 863 //{ 864 //} 865 866 //---------------------------------------------------------------------- 867 // GetDIENamesAndRanges 868 // 869 // Gets the valid address ranges for a given DIE by looking for a 870 // DW_AT_low_pc/DW_AT_high_pc pair, DW_AT_entry_pc, or DW_AT_ranges 871 // attributes. 872 //---------------------------------------------------------------------- 873 bool 874 DWARFDebugInfoEntry::GetDIENamesAndRanges 875 ( 876 SymbolFileDWARF* dwarf2Data, 877 const DWARFCompileUnit* cu, 878 const char * &name, 879 const char * &mangled, 880 DWARFDebugRanges::RangeList& ranges, 881 int& decl_file, 882 int& decl_line, 883 int& decl_column, 884 int& call_file, 885 int& call_line, 886 int& call_column, 887 DWARFExpression *frame_base 888 ) const 889 { 890 if (dwarf2Data == NULL) 891 return false; 892 893 dw_addr_t lo_pc = DW_INVALID_ADDRESS; 894 dw_addr_t hi_pc = DW_INVALID_ADDRESS; 895 std::vector<dw_offset_t> die_offsets; 896 bool set_frame_base_loclist_addr = false; 897 if (m_abbrevDecl) 898 { 899 const DataExtractor& debug_info_data = dwarf2Data->get_debug_info_data(); 900 uint32_t offset = m_offset; 901 902 if (!debug_info_data.ValidOffset(offset)) 903 return false; 904 905 // Skip the abbreviation code 906 debug_info_data.Skip_LEB128(&offset); 907 908 const uint32_t numAttributes = m_abbrevDecl->NumAttributes(); 909 uint32_t i; 910 dw_attr_t attr; 911 dw_form_t form; 912 for (i=0; i<numAttributes; ++i) 913 { 914 m_abbrevDecl->GetAttrAndFormByIndexUnchecked(i, attr, form); 915 DWARFFormValue form_value(form); 916 if (form_value.ExtractValue(debug_info_data, &offset, cu)) 917 { 918 switch (attr) 919 { 920 case DW_AT_low_pc: 921 case DW_AT_entry_pc: 922 lo_pc = form_value.Unsigned(); 923 break; 924 925 case DW_AT_high_pc: 926 hi_pc = form_value.Unsigned(); 927 break; 928 929 case DW_AT_ranges: 930 { 931 const DWARFDebugRanges* debug_ranges = dwarf2Data->DebugRanges(); 932 debug_ranges->FindRanges(form_value.Unsigned(), ranges); 933 // All DW_AT_ranges are relative to the base address of the 934 // compile unit. We add the compile unit base address to make 935 // sure all the addresses are properly fixed up. 936 ranges.AddOffset(cu->GetBaseAddress()); 937 } 938 break; 939 940 case DW_AT_name: 941 if (name == NULL) 942 name = form_value.AsCString(&dwarf2Data->get_debug_str_data()); 943 break; 944 945 case DW_AT_MIPS_linkage_name: 946 if (mangled == NULL) 947 mangled = form_value.AsCString(&dwarf2Data->get_debug_str_data()); 948 break; 949 950 case DW_AT_abstract_origin: 951 die_offsets.push_back(form_value.Reference(cu)); 952 break; 953 954 case DW_AT_specification: 955 die_offsets.push_back(form_value.Reference(cu)); 956 break; 957 958 case DW_AT_decl_file: 959 if (decl_file == 0) 960 decl_file = form_value.Unsigned(); 961 break; 962 963 case DW_AT_decl_line: 964 if (decl_line == 0) 965 decl_line = form_value.Unsigned(); 966 break; 967 968 case DW_AT_decl_column: 969 if (decl_column == 0) 970 decl_column = form_value.Unsigned(); 971 break; 972 973 case DW_AT_call_file: 974 if (call_file == 0) 975 call_file = form_value.Unsigned(); 976 break; 977 978 case DW_AT_call_line: 979 if (call_line == 0) 980 call_line = form_value.Unsigned(); 981 break; 982 983 case DW_AT_call_column: 984 if (call_column == 0) 985 call_column = form_value.Unsigned(); 986 break; 987 988 case DW_AT_frame_base: 989 if (frame_base) 990 { 991 if (form_value.BlockData()) 992 { 993 uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart(); 994 uint32_t block_length = form_value.Unsigned(); 995 frame_base->SetOpcodeData(debug_info_data, block_offset, block_length); 996 } 997 else 998 { 999 const DataExtractor &debug_loc_data = dwarf2Data->get_debug_loc_data(); 1000 const dw_offset_t debug_loc_offset = form_value.Unsigned(); 1001 1002 size_t loc_list_length = DWARFLocationList::Size(debug_loc_data, debug_loc_offset); 1003 if (loc_list_length > 0) 1004 { 1005 frame_base->SetOpcodeData(debug_loc_data, debug_loc_offset, loc_list_length); 1006 if (lo_pc != DW_INVALID_ADDRESS) 1007 { 1008 assert (lo_pc >= cu->GetBaseAddress()); 1009 frame_base->SetLocationListSlide(lo_pc - cu->GetBaseAddress()); 1010 } 1011 else 1012 { 1013 set_frame_base_loclist_addr = true; 1014 } 1015 } 1016 } 1017 } 1018 break; 1019 1020 default: 1021 break; 1022 } 1023 } 1024 } 1025 } 1026 1027 size_t numRanges = ranges.Size(); 1028 1029 if (numRanges == 0) 1030 { 1031 if (lo_pc != DW_INVALID_ADDRESS) 1032 { 1033 if (hi_pc != DW_INVALID_ADDRESS) 1034 ranges.AddRange(lo_pc, hi_pc); 1035 else 1036 ranges.AddRange(lo_pc, lo_pc); 1037 } 1038 } 1039 1040 if (set_frame_base_loclist_addr) 1041 { 1042 assert (ranges.LowestAddress(0) >= cu->GetBaseAddress()); 1043 frame_base->SetLocationListSlide(ranges.LowestAddress(0) - cu->GetBaseAddress()); 1044 } 1045 1046 if (ranges.Size() == 0 || (name == NULL) || (mangled == NULL)) 1047 { 1048 std::vector<dw_offset_t>::const_iterator pos; 1049 std::vector<dw_offset_t>::const_iterator end = die_offsets.end(); 1050 for (pos = die_offsets.begin(); pos != end; ++pos) 1051 { 1052 DWARFCompileUnitSP cu_sp_ptr; 1053 const DWARFDebugInfoEntry* die = NULL; 1054 dw_offset_t die_offset = *pos; 1055 if (die_offset != DW_INVALID_OFFSET) 1056 { 1057 die = dwarf2Data->DebugInfo()->GetDIEPtr(die_offset, &cu_sp_ptr); 1058 if (die) 1059 die->GetDIENamesAndRanges(dwarf2Data, cu_sp_ptr.get(), name, mangled, ranges, decl_file, decl_line, decl_column, call_file, call_line, call_column); 1060 } 1061 } 1062 } 1063 return ranges.Size() > 0; 1064 } 1065 1066 //---------------------------------------------------------------------- 1067 // Dump 1068 // 1069 // Dumps a debug information entry and all of it's attributes to the 1070 // specified stream. 1071 //---------------------------------------------------------------------- 1072 void 1073 DWARFDebugInfoEntry::Dump 1074 ( 1075 SymbolFileDWARF* dwarf2Data, 1076 const DWARFCompileUnit* cu, 1077 Stream *s, 1078 uint32_t recurse_depth 1079 ) const 1080 { 1081 const DataExtractor& debug_info_data = dwarf2Data->get_debug_info_data(); 1082 uint32_t offset = m_offset; 1083 1084 if (debug_info_data.ValidOffset(offset)) 1085 { 1086 dw_uleb128_t abbrCode = debug_info_data.GetULEB128(&offset); 1087 1088 s->Printf("\n0x%8.8x: ", m_offset); 1089 s->Indent(); 1090 if (abbrCode) 1091 { 1092 if (m_abbrevDecl) 1093 { 1094 s->PutCString(DW_TAG_value_to_name(m_abbrevDecl->Tag())); 1095 s->Printf( " [%u] %c\n", abbrCode, m_abbrevDecl->HasChildren() ? '*':' '); 1096 1097 // Dump all data in the .debug_info for the attributes 1098 const uint32_t numAttributes = m_abbrevDecl->NumAttributes(); 1099 uint32_t i; 1100 dw_attr_t attr; 1101 dw_form_t form; 1102 for (i=0; i<numAttributes; ++i) 1103 { 1104 m_abbrevDecl->GetAttrAndFormByIndexUnchecked(i, attr, form); 1105 1106 DumpAttribute(dwarf2Data, cu, debug_info_data, &offset, s, attr, form); 1107 } 1108 1109 const DWARFDebugInfoEntry* child = GetFirstChild(); 1110 if (recurse_depth > 0 && child) 1111 { 1112 s->IndentMore(); 1113 1114 while (child) 1115 { 1116 child->Dump(dwarf2Data, cu, s, recurse_depth-1); 1117 child = child->GetSibling(); 1118 } 1119 s->IndentLess(); 1120 } 1121 } 1122 else 1123 s->Printf( "Abbreviation code note found in 'debug_abbrev' class for code: %u\n", abbrCode); 1124 } 1125 else 1126 { 1127 s->Printf( "NULL\n"); 1128 } 1129 } 1130 } 1131 1132 //---------------------------------------------------------------------- 1133 // DumpAttribute 1134 // 1135 // Dumps a debug information entry attribute along with it's form. Any 1136 // special display of attributes is done (disassemble location lists, 1137 // show enumeration values for attributes, etc). 1138 //---------------------------------------------------------------------- 1139 void 1140 DWARFDebugInfoEntry::DumpAttribute 1141 ( 1142 SymbolFileDWARF* dwarf2Data, 1143 const DWARFCompileUnit* cu, 1144 const DataExtractor& debug_info_data, 1145 uint32_t* offset_ptr, 1146 Stream *s, 1147 dw_attr_t attr, 1148 dw_form_t form 1149 ) 1150 { 1151 bool verbose = s->GetVerbose(); 1152 bool show_form = s->GetFlags().Test(DWARFDebugInfo::eDumpFlag_ShowForm); 1153 const DataExtractor* debug_str_data = dwarf2Data ? &dwarf2Data->get_debug_str_data() : NULL; 1154 if (verbose) 1155 s->Offset (*offset_ptr); 1156 else 1157 s->Printf (" "); 1158 s->Indent(DW_AT_value_to_name(attr)); 1159 1160 if (show_form) 1161 { 1162 s->Printf( "[%s", DW_FORM_value_to_name(form)); 1163 } 1164 1165 DWARFFormValue form_value(form); 1166 1167 if (!form_value.ExtractValue(debug_info_data, offset_ptr, cu)) 1168 return; 1169 1170 if (show_form) 1171 { 1172 if (form == DW_FORM_indirect) 1173 { 1174 s->Printf( " [%s]", DW_FORM_value_to_name(form_value.Form())); 1175 } 1176 1177 s->PutCString("] "); 1178 } 1179 1180 s->PutCString("( "); 1181 1182 // Always dump form value if verbose is enabled 1183 if (verbose) 1184 { 1185 form_value.Dump(s, debug_str_data, cu); 1186 } 1187 1188 1189 // Check to see if we have any special attribute formatters 1190 switch (attr) 1191 { 1192 case DW_AT_stmt_list: 1193 if ( verbose ) s->PutCString(" ( "); 1194 s->Printf( "0x%8.8x", form_value.Unsigned()); 1195 if ( verbose ) s->PutCString(" )"); 1196 break; 1197 1198 case DW_AT_language: 1199 if ( verbose ) s->PutCString(" ( "); 1200 s->PutCString(DW_LANG_value_to_name(form_value.Unsigned())); 1201 if ( verbose ) s->PutCString(" )"); 1202 break; 1203 1204 case DW_AT_encoding: 1205 if ( verbose ) s->PutCString(" ( "); 1206 s->PutCString(DW_ATE_value_to_name(form_value.Unsigned())); 1207 if ( verbose ) s->PutCString(" )"); 1208 break; 1209 1210 case DW_AT_frame_base: 1211 case DW_AT_location: 1212 case DW_AT_data_member_location: 1213 { 1214 const uint8_t* blockData = form_value.BlockData(); 1215 if (blockData) 1216 { 1217 if (!verbose) 1218 form_value.Dump(s, debug_str_data, cu); 1219 1220 // Location description is inlined in data in the form value 1221 DataExtractor locationData(debug_info_data, (*offset_ptr) - form_value.Unsigned(), form_value.Unsigned()); 1222 if ( verbose ) s->PutCString(" ( "); 1223 print_dwarf_expression (s, locationData, DWARFCompileUnit::GetAddressByteSize(cu), 4, false); 1224 if ( verbose ) s->PutCString(" )"); 1225 } 1226 else 1227 { 1228 // We have a location list offset as the value that is 1229 // the offset into the .debug_loc section that describes 1230 // the value over it's lifetime 1231 uint64_t debug_loc_offset = form_value.Unsigned(); 1232 if (dwarf2Data) 1233 { 1234 if ( !verbose ) 1235 form_value.Dump(s, debug_str_data, cu); 1236 DWARFLocationList::Dump(s, cu, dwarf2Data->get_debug_loc_data(), debug_loc_offset); 1237 } 1238 else 1239 { 1240 if ( !verbose ) 1241 form_value.Dump(s, NULL, cu); 1242 } 1243 } 1244 } 1245 break; 1246 1247 case DW_AT_abstract_origin: 1248 case DW_AT_specification: 1249 { 1250 uint64_t abstract_die_offset = form_value.Reference(cu); 1251 form_value.Dump(s, debug_str_data, cu); 1252 // *ostrm_ptr << HEX32 << abstract_die_offset << " ( "; 1253 if ( verbose ) s->PutCString(" ( "); 1254 GetName(dwarf2Data, cu, abstract_die_offset, s); 1255 if ( verbose ) s->PutCString(" )"); 1256 } 1257 break; 1258 1259 case DW_AT_type: 1260 { 1261 uint64_t type_die_offset = form_value.Reference(cu); 1262 if (!verbose) 1263 form_value.Dump(s, debug_str_data, cu); 1264 s->PutCString(" ( "); 1265 AppendTypeName(dwarf2Data, cu, type_die_offset, s); 1266 s->PutCString(" )"); 1267 } 1268 break; 1269 1270 case DW_AT_ranges: 1271 { 1272 if ( !verbose ) 1273 form_value.Dump(s, debug_str_data, cu); 1274 uint32_t ranges_offset = form_value.Unsigned(); 1275 dw_addr_t base_addr = cu ? cu->GetBaseAddress() : 0; 1276 DWARFDebugRanges::Dump(s, dwarf2Data->get_debug_ranges_data(), &ranges_offset, base_addr); 1277 } 1278 break; 1279 1280 default: 1281 if ( !verbose ) 1282 form_value.Dump(s, debug_str_data, cu); 1283 break; 1284 } 1285 1286 s->PutCString(" )\n"); 1287 } 1288 1289 //---------------------------------------------------------------------- 1290 // Get all attribute values for a given DIE, including following any 1291 // specification or abstract origin attributes and including those in 1292 // the results. Any duplicate attributes will have the first instance 1293 // take precedence (this can happen for declaration attributes). 1294 //---------------------------------------------------------------------- 1295 size_t 1296 DWARFDebugInfoEntry::GetAttributes 1297 ( 1298 SymbolFileDWARF* dwarf2Data, 1299 const DWARFCompileUnit* cu, 1300 const uint8_t *fixed_form_sizes, 1301 DWARFDebugInfoEntry::Attributes& attributes, 1302 uint32_t curr_depth 1303 ) const 1304 { 1305 if (m_abbrevDecl) 1306 { 1307 if (fixed_form_sizes == NULL) 1308 fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize(cu->GetAddressByteSize()); 1309 uint32_t offset = GetOffset(); 1310 const DataExtractor& debug_info_data = dwarf2Data->get_debug_info_data(); 1311 1312 // Skip the abbreviation code so we are at the data for the attributes 1313 debug_info_data.Skip_LEB128(&offset); 1314 1315 const uint32_t num_attributes = m_abbrevDecl->NumAttributes(); 1316 uint32_t i; 1317 dw_attr_t attr; 1318 dw_form_t form; 1319 DWARFFormValue form_value; 1320 for (i=0; i<num_attributes; ++i) 1321 { 1322 m_abbrevDecl->GetAttrAndFormByIndexUnchecked (i, attr, form); 1323 1324 // If we are tracking down DW_AT_specification or DW_AT_abstract_origin 1325 // attributes, the depth will be non-zero. We need to omit certain 1326 // attributes that don't make sense. 1327 switch (attr) 1328 { 1329 case DW_AT_sibling: 1330 case DW_AT_declaration: 1331 if (curr_depth > 0) 1332 { 1333 // This attribute doesn't make sense when combined with 1334 // the DIE that references this DIE. We know a DIE is 1335 // referencing this DIE because curr_depth is not zero 1336 break; 1337 } 1338 // Fall through... 1339 default: 1340 attributes.Append(cu, offset, attr, form); 1341 break; 1342 } 1343 1344 if ((attr == DW_AT_specification) || (attr == DW_AT_abstract_origin)) 1345 { 1346 form_value.SetForm(form); 1347 if (form_value.ExtractValue(debug_info_data, &offset, cu)) 1348 { 1349 const DWARFDebugInfoEntry* die = NULL; 1350 dw_offset_t die_offset = form_value.Reference(cu); 1351 if (cu->ContainsDIEOffset(die_offset)) 1352 { 1353 die = const_cast<DWARFCompileUnit*>(cu)->GetDIEPtr(die_offset); 1354 if (die) 1355 die->GetAttributes(dwarf2Data, cu, fixed_form_sizes, attributes, curr_depth + 1); 1356 } 1357 else 1358 { 1359 DWARFCompileUnitSP cu_sp_ptr; 1360 die = const_cast<SymbolFileDWARF*>(dwarf2Data)->DebugInfo()->GetDIEPtr(die_offset, &cu_sp_ptr); 1361 if (die) 1362 die->GetAttributes(dwarf2Data, cu_sp_ptr.get(), fixed_form_sizes, attributes, curr_depth + 1); 1363 } 1364 } 1365 } 1366 else 1367 { 1368 const uint8_t fixed_skip_size = fixed_form_sizes [form]; 1369 if (fixed_skip_size) 1370 offset += fixed_skip_size; 1371 else 1372 DWARFFormValue::SkipValue(form, debug_info_data, &offset, cu); 1373 } 1374 } 1375 } 1376 else 1377 { 1378 attributes.Clear(); 1379 } 1380 return attributes.Size(); 1381 1382 } 1383 1384 //---------------------------------------------------------------------- 1385 // GetAttributeValue 1386 // 1387 // Get the value of an attribute and return the .debug_info offset of the 1388 // attribute if it was properly extracted into form_value, or zero 1389 // if we fail since an offset of zero is invalid for an attribute (it 1390 // would be a compile unit header). 1391 //---------------------------------------------------------------------- 1392 dw_offset_t 1393 DWARFDebugInfoEntry::GetAttributeValue 1394 ( 1395 SymbolFileDWARF* dwarf2Data, 1396 const DWARFCompileUnit* cu, 1397 const dw_attr_t attr, 1398 DWARFFormValue& form_value, 1399 dw_offset_t* end_attr_offset_ptr 1400 ) const 1401 { 1402 if (m_abbrevDecl) 1403 { 1404 uint32_t attr_idx = m_abbrevDecl->FindAttributeIndex(attr); 1405 1406 if (attr_idx != DW_INVALID_INDEX) 1407 { 1408 uint32_t offset = GetOffset(); 1409 1410 const DataExtractor& debug_info_data = dwarf2Data->get_debug_info_data(); 1411 1412 // Skip the abbreviation code so we are at the data for the attributes 1413 debug_info_data.Skip_LEB128(&offset); 1414 1415 uint32_t idx=0; 1416 while (idx<attr_idx) 1417 DWARFFormValue::SkipValue(m_abbrevDecl->GetFormByIndex(idx++), debug_info_data, &offset, cu); 1418 1419 const dw_offset_t attr_offset = offset; 1420 form_value.SetForm(m_abbrevDecl->GetFormByIndex(idx)); 1421 if (form_value.ExtractValue(debug_info_data, &offset, cu)) 1422 { 1423 if (end_attr_offset_ptr) 1424 *end_attr_offset_ptr = offset; 1425 return attr_offset; 1426 } 1427 } 1428 } 1429 1430 return 0; 1431 } 1432 1433 //---------------------------------------------------------------------- 1434 // GetAttributeValueAsString 1435 // 1436 // Get the value of an attribute as a string return it. The resulting 1437 // pointer to the string data exists within the supplied SymbolFileDWARF 1438 // and will only be available as long as the SymbolFileDWARF is still around 1439 // and it's content doesn't change. 1440 //---------------------------------------------------------------------- 1441 const char* 1442 DWARFDebugInfoEntry::GetAttributeValueAsString 1443 ( 1444 SymbolFileDWARF* dwarf2Data, 1445 const DWARFCompileUnit* cu, 1446 const dw_attr_t attr, 1447 const char* fail_value) const 1448 { 1449 DWARFFormValue form_value; 1450 if (GetAttributeValue(dwarf2Data, cu, attr, form_value)) 1451 return form_value.AsCString(&dwarf2Data->get_debug_str_data()); 1452 return fail_value; 1453 } 1454 1455 //---------------------------------------------------------------------- 1456 // GetAttributeValueAsUnsigned 1457 // 1458 // Get the value of an attribute as unsigned and return it. 1459 //---------------------------------------------------------------------- 1460 uint64_t 1461 DWARFDebugInfoEntry::GetAttributeValueAsUnsigned 1462 ( 1463 SymbolFileDWARF* dwarf2Data, 1464 const DWARFCompileUnit* cu, 1465 const dw_attr_t attr, 1466 uint64_t fail_value 1467 ) const 1468 { 1469 DWARFFormValue form_value; 1470 if (GetAttributeValue(dwarf2Data, cu, attr, form_value)) 1471 return form_value.Unsigned(); 1472 return fail_value; 1473 } 1474 1475 //---------------------------------------------------------------------- 1476 // GetAttributeValueAsSigned 1477 // 1478 // Get the value of an attribute a signed value and return it. 1479 //---------------------------------------------------------------------- 1480 int64_t 1481 DWARFDebugInfoEntry::GetAttributeValueAsSigned 1482 ( 1483 SymbolFileDWARF* dwarf2Data, 1484 const DWARFCompileUnit* cu, 1485 const dw_attr_t attr, 1486 int64_t fail_value 1487 ) const 1488 { 1489 DWARFFormValue form_value; 1490 if (GetAttributeValue(dwarf2Data, cu, attr, form_value)) 1491 return form_value.Signed(); 1492 return fail_value; 1493 } 1494 1495 //---------------------------------------------------------------------- 1496 // GetAttributeValueAsReference 1497 // 1498 // Get the value of an attribute as reference and fix up and compile 1499 // unit relative offsets as needed. 1500 //---------------------------------------------------------------------- 1501 uint64_t 1502 DWARFDebugInfoEntry::GetAttributeValueAsReference 1503 ( 1504 SymbolFileDWARF* dwarf2Data, 1505 const DWARFCompileUnit* cu, 1506 const dw_attr_t attr, 1507 uint64_t fail_value 1508 ) const 1509 { 1510 DWARFFormValue form_value; 1511 if (GetAttributeValue(dwarf2Data, cu, attr, form_value)) 1512 return form_value.Reference(cu); 1513 return fail_value; 1514 } 1515 1516 //---------------------------------------------------------------------- 1517 // GetAttributeValueAsLocation 1518 // 1519 // Get the value of an attribute as reference and fix up and compile 1520 // unit relative offsets as needed. 1521 //---------------------------------------------------------------------- 1522 dw_offset_t 1523 DWARFDebugInfoEntry::GetAttributeValueAsLocation 1524 ( 1525 SymbolFileDWARF* dwarf2Data, 1526 const DWARFCompileUnit* cu, 1527 const dw_attr_t attr, 1528 DataExtractor& location_data, 1529 uint32_t &block_size 1530 ) const 1531 { 1532 block_size = 0; 1533 DWARFFormValue form_value; 1534 1535 // Empty out data in case we don't find anything 1536 location_data.Clear(); 1537 dw_offset_t end_addr_offset = DW_INVALID_OFFSET; 1538 const dw_offset_t attr_offset = GetAttributeValue(dwarf2Data, cu, attr, form_value, &end_addr_offset); 1539 if (attr_offset) 1540 { 1541 const uint8_t* blockData = form_value.BlockData(); 1542 if (blockData) 1543 { 1544 // We have an inlined location list in the .debug_info section 1545 const DataExtractor& debug_info = dwarf2Data->get_debug_info_data(); 1546 dw_offset_t block_offset = blockData - debug_info.GetDataStart(); 1547 block_size = (end_addr_offset - attr_offset) - form_value.Unsigned(); 1548 location_data.SetData(debug_info, block_offset, block_size); 1549 } 1550 else 1551 { 1552 // We have a location list offset as the value that is 1553 // the offset into the .debug_loc section that describes 1554 // the value over it's lifetime 1555 dw_offset_t debug_loc_offset = form_value.Unsigned(); 1556 if (dwarf2Data) 1557 { 1558 assert(dwarf2Data->get_debug_loc_data().GetAddressByteSize() == cu->GetAddressByteSize()); 1559 return DWARFLocationList::Extract(dwarf2Data->get_debug_loc_data(), &debug_loc_offset, location_data); 1560 } 1561 } 1562 } 1563 return attr_offset; 1564 } 1565 1566 //---------------------------------------------------------------------- 1567 // GetName 1568 // 1569 // Get value of the DW_AT_name attribute and return it if one exists, 1570 // else return NULL. 1571 //---------------------------------------------------------------------- 1572 const char* 1573 DWARFDebugInfoEntry::GetName 1574 ( 1575 SymbolFileDWARF* dwarf2Data, 1576 const DWARFCompileUnit* cu 1577 ) const 1578 { 1579 DWARFFormValue form_value; 1580 if (GetAttributeValue(dwarf2Data, cu, DW_AT_name, form_value)) 1581 return form_value.AsCString(&dwarf2Data->get_debug_str_data()); 1582 return NULL; 1583 } 1584 1585 1586 //---------------------------------------------------------------------- 1587 // GetMangledName 1588 // 1589 // Get value of the DW_AT_MIPS_linkage_name attribute and return it if 1590 // one exists, else return the value of the DW_AT_name attribute 1591 //---------------------------------------------------------------------- 1592 const char* 1593 DWARFDebugInfoEntry::GetMangledName 1594 ( 1595 SymbolFileDWARF* dwarf2Data, 1596 const DWARFCompileUnit* cu, 1597 bool substitute_name_allowed 1598 ) const 1599 { 1600 const char* name = NULL; 1601 DWARFFormValue form_value; 1602 1603 if (GetAttributeValue(dwarf2Data, cu, DW_AT_MIPS_linkage_name, form_value)) 1604 name = form_value.AsCString(&dwarf2Data->get_debug_str_data()); 1605 1606 if (substitute_name_allowed && name == NULL) 1607 { 1608 if (GetAttributeValue(dwarf2Data, cu, DW_AT_name, form_value)) 1609 name = form_value.AsCString(&dwarf2Data->get_debug_str_data()); 1610 } 1611 return name; 1612 } 1613 1614 1615 //---------------------------------------------------------------------- 1616 // GetPubname 1617 // 1618 // Get value the name for a DIE as it should appear for a 1619 // .debug_pubnames or .debug_pubtypes section. 1620 //---------------------------------------------------------------------- 1621 const char* 1622 DWARFDebugInfoEntry::GetPubname 1623 ( 1624 SymbolFileDWARF* dwarf2Data, 1625 const DWARFCompileUnit* cu 1626 ) const 1627 { 1628 const char* name = NULL; 1629 DWARFFormValue form_value; 1630 1631 if (GetAttributeValue(dwarf2Data, cu, DW_AT_MIPS_linkage_name, form_value)) 1632 name = form_value.AsCString(&dwarf2Data->get_debug_str_data()); 1633 else if (GetAttributeValue(dwarf2Data, cu, DW_AT_name, form_value)) 1634 name = form_value.AsCString(&dwarf2Data->get_debug_str_data()); 1635 else if (GetAttributeValue(dwarf2Data, cu, DW_AT_specification, form_value)) 1636 { 1637 // The specification DIE may be in another compile unit so we need 1638 // to get a die and its compile unit. 1639 DWARFCompileUnitSP cu_sp_ptr; 1640 const DWARFDebugInfoEntry* die = const_cast<SymbolFileDWARF*>(dwarf2Data)->DebugInfo()->GetDIEPtr(form_value.Reference(cu), &cu_sp_ptr); 1641 if (die) 1642 return die->GetPubname(dwarf2Data, cu_sp_ptr.get()); 1643 } 1644 return name; 1645 } 1646 1647 1648 //---------------------------------------------------------------------- 1649 // GetName 1650 // 1651 // Get value of the DW_AT_name attribute for a debug information entry 1652 // that exists at offset "die_offset" and place that value into the 1653 // supplied stream object. If the DIE is a NULL object "NULL" is placed 1654 // into the stream, and if no DW_AT_name attribute exists for the DIE 1655 // then nothing is printed. 1656 //---------------------------------------------------------------------- 1657 bool 1658 DWARFDebugInfoEntry::GetName 1659 ( 1660 SymbolFileDWARF* dwarf2Data, 1661 const DWARFCompileUnit* cu, 1662 const uint32_t die_offset, 1663 Stream *s 1664 ) 1665 { 1666 DWARFDebugInfoEntry die; 1667 uint32_t offset = die_offset; 1668 if (die.Extract(dwarf2Data, cu, &offset)) 1669 { 1670 if (die.IsNULL()) 1671 { 1672 s->PutCString("NULL"); 1673 return true; 1674 } 1675 else 1676 { 1677 DWARFFormValue form_value; 1678 if (die.GetAttributeValue(dwarf2Data, cu, DW_AT_name, form_value)) 1679 { 1680 const char* name = form_value.AsCString(&dwarf2Data->get_debug_str_data()); 1681 if (name) 1682 { 1683 s->PutCString(name); 1684 return true; 1685 } 1686 } 1687 } 1688 } 1689 return false; 1690 } 1691 1692 //---------------------------------------------------------------------- 1693 // AppendTypeName 1694 // 1695 // Follows the type name definition down through all needed tags to 1696 // end up with a fully qualified type name and dump the results to 1697 // the supplied stream. This is used to show the name of types given 1698 // a type identifier. 1699 //---------------------------------------------------------------------- 1700 bool 1701 DWARFDebugInfoEntry::AppendTypeName 1702 ( 1703 SymbolFileDWARF* dwarf2Data, 1704 const DWARFCompileUnit* cu, 1705 const uint32_t die_offset, 1706 Stream *s 1707 ) 1708 { 1709 DWARFDebugInfoEntry die; 1710 uint32_t offset = die_offset; 1711 if (die.Extract(dwarf2Data, cu, &offset)) 1712 { 1713 if (die.IsNULL()) 1714 { 1715 s->PutCString("NULL"); 1716 return true; 1717 } 1718 else 1719 { 1720 const char* name = die.GetPubname(dwarf2Data, cu); 1721 // if (die.GetAttributeValue(dwarf2Data, cu, DW_AT_name, form_value)) 1722 // name = form_value.AsCString(&dwarf2Data->get_debug_str_data()); 1723 if (name) 1724 s->PutCString(name); 1725 else 1726 { 1727 bool result = true; 1728 const DWARFAbbreviationDeclaration* abbrevDecl = die.GetAbbreviationDeclarationPtr(); 1729 1730 switch (abbrevDecl->Tag()) 1731 { 1732 case DW_TAG_array_type: break; // print out a "[]" after printing the full type of the element below 1733 case DW_TAG_base_type: s->PutCString("base "); break; 1734 case DW_TAG_class_type: s->PutCString("class "); break; 1735 case DW_TAG_const_type: s->PutCString("const "); break; 1736 case DW_TAG_enumeration_type: s->PutCString("enum "); break; 1737 case DW_TAG_file_type: s->PutCString("file "); break; 1738 case DW_TAG_interface_type: s->PutCString("interface "); break; 1739 case DW_TAG_packed_type: s->PutCString("packed "); break; 1740 case DW_TAG_pointer_type: break; // print out a '*' after printing the full type below 1741 case DW_TAG_ptr_to_member_type: break; // print out a '*' after printing the full type below 1742 case DW_TAG_reference_type: break; // print out a '&' after printing the full type below 1743 case DW_TAG_restrict_type: s->PutCString("restrict "); break; 1744 case DW_TAG_set_type: s->PutCString("set "); break; 1745 case DW_TAG_shared_type: s->PutCString("shared "); break; 1746 case DW_TAG_string_type: s->PutCString("string "); break; 1747 case DW_TAG_structure_type: s->PutCString("struct "); break; 1748 case DW_TAG_subrange_type: s->PutCString("subrange "); break; 1749 case DW_TAG_subroutine_type: s->PutCString("function "); break; 1750 case DW_TAG_thrown_type: s->PutCString("thrown "); break; 1751 case DW_TAG_union_type: s->PutCString("union "); break; 1752 case DW_TAG_unspecified_type: s->PutCString("unspecified "); break; 1753 case DW_TAG_volatile_type: s->PutCString("volatile "); break; 1754 default: 1755 return false; 1756 } 1757 1758 // Follow the DW_AT_type if possible 1759 DWARFFormValue form_value; 1760 if (die.GetAttributeValue(dwarf2Data, cu, DW_AT_type, form_value)) 1761 { 1762 uint64_t next_die_offset = form_value.Reference(cu); 1763 result = AppendTypeName(dwarf2Data, cu, next_die_offset, s); 1764 } 1765 1766 switch (abbrevDecl->Tag()) 1767 { 1768 case DW_TAG_array_type: s->PutCString("[]"); break; 1769 case DW_TAG_pointer_type: s->PutChar('*'); break; 1770 case DW_TAG_ptr_to_member_type: s->PutChar('*'); break; 1771 case DW_TAG_reference_type: s->PutChar('&'); break; 1772 default: 1773 break; 1774 } 1775 return result; 1776 } 1777 } 1778 } 1779 return false; 1780 } 1781 1782 //---------------------------------------------------------------------- 1783 // BuildAddressRangeTable 1784 //---------------------------------------------------------------------- 1785 void 1786 DWARFDebugInfoEntry::BuildAddressRangeTable 1787 ( 1788 SymbolFileDWARF* dwarf2Data, 1789 const DWARFCompileUnit* cu, 1790 DWARFDebugAranges* debug_aranges 1791 ) const 1792 { 1793 if (m_abbrevDecl) 1794 { 1795 dw_tag_t tag = m_abbrevDecl->Tag(); 1796 if (tag == DW_TAG_subprogram) 1797 { 1798 dw_addr_t hi_pc = DW_INVALID_ADDRESS; 1799 dw_addr_t lo_pc = GetAttributeValueAsUnsigned(dwarf2Data, cu, DW_AT_low_pc, DW_INVALID_ADDRESS); 1800 if (lo_pc != DW_INVALID_ADDRESS) 1801 hi_pc = GetAttributeValueAsUnsigned(dwarf2Data, cu, DW_AT_high_pc, DW_INVALID_ADDRESS); 1802 if (hi_pc != DW_INVALID_ADDRESS) 1803 { 1804 /// printf("BuildAddressRangeTable() 0x%8.8x: %30s: [0x%8.8x - 0x%8.8x)\n", m_offset, DW_TAG_value_to_name(tag), lo_pc, hi_pc); 1805 debug_aranges->InsertRange(cu->GetOffset(), lo_pc, hi_pc); 1806 } 1807 } 1808 1809 1810 const DWARFDebugInfoEntry* child = GetFirstChild(); 1811 while (child) 1812 { 1813 child->BuildAddressRangeTable(dwarf2Data, cu, debug_aranges); 1814 child = child->GetSibling(); 1815 } 1816 } 1817 } 1818 1819 //---------------------------------------------------------------------- 1820 // BuildFunctionAddressRangeTable 1821 // 1822 // This function is very similar to the BuildAddressRangeTable function 1823 // except that the actual DIE offset for the function is placed in the 1824 // table instead of the compile unit offset (which is the way the 1825 // standard .debug_aranges section does it). 1826 //---------------------------------------------------------------------- 1827 void 1828 DWARFDebugInfoEntry::BuildFunctionAddressRangeTable 1829 ( 1830 SymbolFileDWARF* dwarf2Data, 1831 const DWARFCompileUnit* cu, 1832 DWARFDebugAranges* debug_aranges 1833 ) const 1834 { 1835 if (m_abbrevDecl) 1836 { 1837 dw_tag_t tag = m_abbrevDecl->Tag(); 1838 if (tag == DW_TAG_subprogram) 1839 { 1840 dw_addr_t hi_pc = DW_INVALID_ADDRESS; 1841 dw_addr_t lo_pc = GetAttributeValueAsUnsigned(dwarf2Data, cu, DW_AT_low_pc, DW_INVALID_ADDRESS); 1842 if (lo_pc != DW_INVALID_ADDRESS) 1843 hi_pc = GetAttributeValueAsUnsigned(dwarf2Data, cu, DW_AT_high_pc, DW_INVALID_ADDRESS); 1844 if (hi_pc != DW_INVALID_ADDRESS) 1845 { 1846 // printf("BuildAddressRangeTable() 0x%8.8x: [0x%16.16llx - 0x%16.16llx)\n", m_offset, lo_pc, hi_pc); // DEBUG ONLY 1847 debug_aranges->InsertRange(GetOffset(), lo_pc, hi_pc); 1848 } 1849 } 1850 1851 const DWARFDebugInfoEntry* child = GetFirstChild(); 1852 while (child) 1853 { 1854 child->BuildFunctionAddressRangeTable(dwarf2Data, cu, debug_aranges); 1855 child = child->GetSibling(); 1856 } 1857 } 1858 } 1859 1860 1861 //---------------------------------------------------------------------- 1862 // LookupAddress 1863 //---------------------------------------------------------------------- 1864 bool 1865 DWARFDebugInfoEntry::LookupAddress 1866 ( 1867 const dw_addr_t address, 1868 SymbolFileDWARF* dwarf2Data, 1869 const DWARFCompileUnit* cu, 1870 DWARFDebugInfoEntry** function_die, 1871 DWARFDebugInfoEntry** block_die 1872 ) 1873 { 1874 bool found_address = false; 1875 if (m_abbrevDecl) 1876 { 1877 bool check_children = false; 1878 bool match_addr_range = false; 1879 dw_tag_t tag = m_abbrevDecl->Tag(); 1880 // printf("0x%8.8x: %30s: address = 0x%8.8x - ", m_offset, DW_TAG_value_to_name(tag), address); 1881 switch (tag) 1882 { 1883 case DW_TAG_array_type : break; 1884 case DW_TAG_class_type : check_children = true; break; 1885 case DW_TAG_entry_point : break; 1886 case DW_TAG_enumeration_type : break; 1887 case DW_TAG_formal_parameter : break; 1888 case DW_TAG_imported_declaration : break; 1889 case DW_TAG_label : break; 1890 case DW_TAG_lexical_block : check_children = true; match_addr_range = true; break; 1891 case DW_TAG_member : break; 1892 case DW_TAG_pointer_type : break; 1893 case DW_TAG_reference_type : break; 1894 case DW_TAG_compile_unit : match_addr_range = true; break; 1895 case DW_TAG_string_type : break; 1896 case DW_TAG_structure_type : check_children = true; break; 1897 case DW_TAG_subroutine_type : break; 1898 case DW_TAG_typedef : break; 1899 case DW_TAG_union_type : break; 1900 case DW_TAG_unspecified_parameters : break; 1901 case DW_TAG_variant : break; 1902 case DW_TAG_common_block : check_children = true; break; 1903 case DW_TAG_common_inclusion : break; 1904 case DW_TAG_inheritance : break; 1905 case DW_TAG_inlined_subroutine : check_children = true; match_addr_range = true; break; 1906 case DW_TAG_module : match_addr_range = true; break; 1907 case DW_TAG_ptr_to_member_type : break; 1908 case DW_TAG_set_type : break; 1909 case DW_TAG_subrange_type : break; 1910 case DW_TAG_with_stmt : break; 1911 case DW_TAG_access_declaration : break; 1912 case DW_TAG_base_type : break; 1913 case DW_TAG_catch_block : match_addr_range = true; break; 1914 case DW_TAG_const_type : break; 1915 case DW_TAG_constant : break; 1916 case DW_TAG_enumerator : break; 1917 case DW_TAG_file_type : break; 1918 case DW_TAG_friend : break; 1919 case DW_TAG_namelist : break; 1920 case DW_TAG_namelist_item : break; 1921 case DW_TAG_packed_type : break; 1922 case DW_TAG_subprogram : match_addr_range = true; break; 1923 case DW_TAG_template_type_parameter : break; 1924 case DW_TAG_template_value_parameter : break; 1925 case DW_TAG_thrown_type : break; 1926 case DW_TAG_try_block : match_addr_range = true; break; 1927 case DW_TAG_variant_part : break; 1928 case DW_TAG_variable : break; 1929 case DW_TAG_volatile_type : break; 1930 case DW_TAG_dwarf_procedure : break; 1931 case DW_TAG_restrict_type : break; 1932 case DW_TAG_interface_type : break; 1933 case DW_TAG_namespace : check_children = true; break; 1934 case DW_TAG_imported_module : break; 1935 case DW_TAG_unspecified_type : break; 1936 case DW_TAG_partial_unit : break; 1937 case DW_TAG_imported_unit : break; 1938 case DW_TAG_shared_type : break; 1939 default: break; 1940 } 1941 1942 if (match_addr_range) 1943 { 1944 dw_addr_t lo_pc = GetAttributeValueAsUnsigned(dwarf2Data, cu, DW_AT_low_pc, DW_INVALID_ADDRESS); 1945 if (lo_pc != DW_INVALID_ADDRESS) 1946 { 1947 dw_addr_t hi_pc = GetAttributeValueAsUnsigned(dwarf2Data, cu, DW_AT_high_pc, DW_INVALID_ADDRESS); 1948 if (hi_pc != DW_INVALID_ADDRESS) 1949 { 1950 // printf("\n0x%8.8x: %30s: address = 0x%8.8x [0x%8.8x - 0x%8.8x) ", m_offset, DW_TAG_value_to_name(tag), address, lo_pc, hi_pc); 1951 if ((lo_pc <= address) && (address < hi_pc)) 1952 { 1953 found_address = true; 1954 // puts("***MATCH***"); 1955 switch (tag) 1956 { 1957 case DW_TAG_compile_unit: // File 1958 check_children = ((function_die != NULL) || (block_die != NULL)); 1959 break; 1960 1961 case DW_TAG_subprogram: // Function 1962 if (function_die) 1963 *function_die = this; 1964 check_children = (block_die != NULL); 1965 break; 1966 1967 case DW_TAG_inlined_subroutine: // Inlined Function 1968 case DW_TAG_lexical_block: // Block { } in code 1969 if (block_die) 1970 { 1971 *block_die = this; 1972 check_children = true; 1973 } 1974 break; 1975 1976 default: 1977 check_children = true; 1978 break; 1979 } 1980 } 1981 } 1982 else 1983 { // compile units may not have a valid high/low pc when there 1984 // are address gaps in subroutines so we must always search 1985 // if there is no valid high and low PC 1986 check_children = (tag == DW_TAG_compile_unit) && ((function_die != NULL) || (block_die != NULL)); 1987 } 1988 } 1989 else 1990 { 1991 dw_offset_t debug_ranges_offset = GetAttributeValueAsUnsigned(dwarf2Data, cu, DW_AT_ranges, DW_INVALID_OFFSET); 1992 if (debug_ranges_offset != DW_INVALID_OFFSET) 1993 { 1994 DWARFDebugRanges::RangeList ranges; 1995 DWARFDebugRanges* debug_ranges = dwarf2Data->DebugRanges(); 1996 debug_ranges->FindRanges(debug_ranges_offset, ranges); 1997 // All DW_AT_ranges are relative to the base address of the 1998 // compile unit. We add the compile unit base address to make 1999 // sure all the addresses are properly fixed up. 2000 ranges.AddOffset(cu->GetBaseAddress()); 2001 if (ranges.Lookup(address)) 2002 { 2003 found_address = true; 2004 // puts("***MATCH***"); 2005 switch (tag) 2006 { 2007 case DW_TAG_compile_unit: // File 2008 check_children = ((function_die != NULL) || (block_die != NULL)); 2009 break; 2010 2011 case DW_TAG_subprogram: // Function 2012 if (function_die) 2013 *function_die = this; 2014 check_children = (block_die != NULL); 2015 break; 2016 2017 case DW_TAG_inlined_subroutine: // Inlined Function 2018 case DW_TAG_lexical_block: // Block { } in code 2019 if (block_die) 2020 { 2021 *block_die = this; 2022 check_children = true; 2023 } 2024 break; 2025 2026 default: 2027 check_children = true; 2028 break; 2029 } 2030 } 2031 else 2032 { 2033 check_children = false; 2034 } 2035 } 2036 } 2037 } 2038 2039 2040 if (check_children) 2041 { 2042 // printf("checking children\n"); 2043 DWARFDebugInfoEntry* child = GetFirstChild(); 2044 while (child) 2045 { 2046 if (child->LookupAddress(address, dwarf2Data, cu, function_die, block_die)) 2047 return true; 2048 child = child->GetSibling(); 2049 } 2050 } 2051 } 2052 return found_address; 2053 } 2054 2055 2056 bool 2057 DWARFDebugInfoEntry::OffsetLessThan (const DWARFDebugInfoEntry& a, const DWARFDebugInfoEntry& b) 2058 { 2059 return a.GetOffset() < b.GetOffset(); 2060 } 2061 2062