DWARFDebugInfoEntry.cpp revision 280031
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/Core/Stream.h" 18#include "lldb/Expression/DWARFExpression.h" 19#include "lldb/Symbol/ObjectFile.h" 20 21#include "DWARFCompileUnit.h" 22#include "SymbolFileDWARF.h" 23#include "DWARFDebugAbbrev.h" 24#include "DWARFDebugAranges.h" 25#include "DWARFDebugInfo.h" 26#include "DWARFDeclContext.h" 27#include "DWARFDIECollection.h" 28#include "DWARFFormValue.h" 29#include "DWARFLocationDescription.h" 30#include "DWARFLocationList.h" 31#include "DWARFDebugRanges.h" 32 33using namespace lldb_private; 34using namespace std; 35extern int g_verbose; 36 37 38 39DWARFDebugInfoEntry::Attributes::Attributes() : 40 m_infos() 41{ 42} 43 44DWARFDebugInfoEntry::Attributes::~Attributes() 45{ 46} 47 48 49uint32_t 50DWARFDebugInfoEntry::Attributes::FindAttributeIndex(dw_attr_t attr) const 51{ 52 collection::const_iterator end = m_infos.end(); 53 collection::const_iterator beg = m_infos.begin(); 54 collection::const_iterator pos; 55 for (pos = beg; pos != end; ++pos) 56 { 57 if (pos->attr == attr) 58 return std::distance(beg, pos); 59 } 60 return UINT32_MAX; 61} 62 63void 64DWARFDebugInfoEntry::Attributes::Append(const DWARFCompileUnit *cu, dw_offset_t attr_die_offset, dw_attr_t attr, dw_form_t form) 65{ 66 Info info = { cu, attr_die_offset, attr, form }; 67 m_infos.push_back(info); 68} 69 70bool 71DWARFDebugInfoEntry::Attributes::ContainsAttribute(dw_attr_t attr) const 72{ 73 return FindAttributeIndex(attr) != UINT32_MAX; 74} 75 76bool 77DWARFDebugInfoEntry::Attributes::RemoveAttribute(dw_attr_t attr) 78{ 79 uint32_t attr_index = FindAttributeIndex(attr); 80 if (attr_index != UINT32_MAX) 81 { 82 m_infos.erase(m_infos.begin() + attr_index); 83 return true; 84 } 85 return false; 86} 87 88bool 89DWARFDebugInfoEntry::Attributes::ExtractFormValueAtIndex (SymbolFileDWARF* dwarf2Data, uint32_t i, DWARFFormValue &form_value) const 90{ 91 form_value.SetCompileUnit(CompileUnitAtIndex(i)); 92 form_value.SetForm(FormAtIndex(i)); 93 lldb::offset_t offset = DIEOffsetAtIndex(i); 94 return form_value.ExtractValue(dwarf2Data->get_debug_info_data(), &offset); 95} 96 97uint64_t 98DWARFDebugInfoEntry::Attributes::FormValueAsUnsigned (SymbolFileDWARF* dwarf2Data, dw_attr_t attr, uint64_t fail_value) const 99{ 100 const uint32_t attr_idx = FindAttributeIndex (attr); 101 if (attr_idx != UINT32_MAX) 102 return FormValueAsUnsignedAtIndex (dwarf2Data, attr_idx, fail_value); 103 return fail_value; 104} 105 106uint64_t 107DWARFDebugInfoEntry::Attributes::FormValueAsUnsignedAtIndex(SymbolFileDWARF* dwarf2Data, uint32_t i, uint64_t fail_value) const 108{ 109 DWARFFormValue form_value; 110 if (ExtractFormValueAtIndex(dwarf2Data, i, form_value)) 111 return form_value.Reference(); 112 return fail_value; 113} 114 115 116 117bool 118DWARFDebugInfoEntry::FastExtract 119( 120 const DWARFDataExtractor& debug_info_data, 121 const DWARFCompileUnit* cu, 122 const uint8_t *fixed_form_sizes, 123 lldb::offset_t *offset_ptr 124) 125{ 126 m_offset = *offset_ptr; 127 m_parent_idx = 0; 128 m_sibling_idx = 0; 129 m_empty_children = false; 130 const uint64_t abbr_idx = debug_info_data.GetULEB128 (offset_ptr); 131 assert (abbr_idx < (1 << DIE_ABBR_IDX_BITSIZE)); 132 m_abbr_idx = abbr_idx; 133 134 //assert (fixed_form_sizes); // For best performance this should be specified! 135 136 if (m_abbr_idx) 137 { 138 lldb::offset_t offset = *offset_ptr; 139 140 const DWARFAbbreviationDeclaration *abbrevDecl = cu->GetAbbreviations()->GetAbbreviationDeclaration(m_abbr_idx); 141 142 if (abbrevDecl == NULL) 143 { 144 cu->GetSymbolFileDWARF()->GetObjectFile()->GetModule()->ReportError ("{0x%8.8x}: invalid abbreviation code %u, please file a bug and attach the file at the start of this error message", 145 m_offset, 146 (unsigned)abbr_idx); 147 // WE can't parse anymore if the DWARF is borked... 148 *offset_ptr = UINT32_MAX; 149 return false; 150 } 151 m_tag = abbrevDecl->Tag(); 152 m_has_children = abbrevDecl->HasChildren(); 153 // Skip all data in the .debug_info for the attributes 154 const uint32_t numAttributes = abbrevDecl->NumAttributes(); 155 uint32_t i; 156 dw_form_t form; 157 for (i=0; i<numAttributes; ++i) 158 { 159 form = abbrevDecl->GetFormByIndexUnchecked(i); 160 161 const uint8_t fixed_skip_size = fixed_form_sizes [form]; 162 if (fixed_skip_size) 163 offset += fixed_skip_size; 164 else 165 { 166 bool form_is_indirect = false; 167 do 168 { 169 form_is_indirect = false; 170 uint32_t form_size = 0; 171 switch (form) 172 { 173 // Blocks if inlined data that have a length field and the data bytes 174 // inlined in the .debug_info 175 case DW_FORM_exprloc : 176 case DW_FORM_block : form_size = debug_info_data.GetULEB128 (&offset); break; 177 case DW_FORM_block1 : form_size = debug_info_data.GetU8_unchecked (&offset); break; 178 case DW_FORM_block2 : form_size = debug_info_data.GetU16_unchecked (&offset);break; 179 case DW_FORM_block4 : form_size = debug_info_data.GetU32_unchecked (&offset);break; 180 181 // Inlined NULL terminated C-strings 182 case DW_FORM_string : 183 debug_info_data.GetCStr (&offset); 184 break; 185 186 // Compile unit address sized values 187 case DW_FORM_addr : 188 form_size = cu->GetAddressByteSize(); 189 break; 190 case DW_FORM_ref_addr : 191 if (cu->GetVersion() <= 2) 192 form_size = cu->GetAddressByteSize(); 193 else 194 form_size = cu->IsDWARF64() ? 8 : 4; 195 break; 196 197 // 0 sized form 198 case DW_FORM_flag_present: 199 form_size = 0; 200 break; 201 202 // 1 byte values 203 case DW_FORM_data1 : 204 case DW_FORM_flag : 205 case DW_FORM_ref1 : 206 form_size = 1; 207 break; 208 209 // 2 byte values 210 case DW_FORM_data2 : 211 case DW_FORM_ref2 : 212 form_size = 2; 213 break; 214 215 // 4 byte values 216 case DW_FORM_data4 : 217 case DW_FORM_ref4 : 218 form_size = 4; 219 break; 220 221 // 8 byte values 222 case DW_FORM_data8 : 223 case DW_FORM_ref8 : 224 case DW_FORM_ref_sig8 : 225 form_size = 8; 226 break; 227 228 // signed or unsigned LEB 128 values 229 case DW_FORM_sdata : 230 case DW_FORM_udata : 231 case DW_FORM_ref_udata : 232 debug_info_data.Skip_LEB128 (&offset); 233 break; 234 235 case DW_FORM_indirect : 236 form_is_indirect = true; 237 form = debug_info_data.GetULEB128 (&offset); 238 break; 239 240 case DW_FORM_strp : 241 case DW_FORM_sec_offset : 242 if (cu->IsDWARF64 ()) 243 debug_info_data.GetU64 (offset_ptr); 244 else 245 debug_info_data.GetU32 (offset_ptr); 246 break; 247 248 default: 249 *offset_ptr = m_offset; 250 return false; 251 } 252 offset += form_size; 253 254 } while (form_is_indirect); 255 } 256 } 257 *offset_ptr = offset; 258 return true; 259 } 260 else 261 { 262 m_tag = 0; 263 m_has_children = false; 264 return true; // NULL debug tag entry 265 } 266 267 return false; 268} 269 270//---------------------------------------------------------------------- 271// Extract 272// 273// Extract a debug info entry for a given compile unit from the 274// .debug_info and .debug_abbrev data within the SymbolFileDWARF class 275// starting at the given offset 276//---------------------------------------------------------------------- 277bool 278DWARFDebugInfoEntry::Extract 279( 280 SymbolFileDWARF* dwarf2Data, 281 const DWARFCompileUnit* cu, 282 lldb::offset_t *offset_ptr 283) 284{ 285 const DWARFDataExtractor& debug_info_data = dwarf2Data->get_debug_info_data(); 286// const DWARFDataExtractor& debug_str_data = dwarf2Data->get_debug_str_data(); 287 const uint32_t cu_end_offset = cu->GetNextCompileUnitOffset(); 288 lldb::offset_t offset = *offset_ptr; 289// if (offset >= cu_end_offset) 290// 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); 291 if ((offset < cu_end_offset) && debug_info_data.ValidOffset(offset)) 292 { 293 m_offset = offset; 294 295 const uint64_t abbr_idx = debug_info_data.GetULEB128(&offset); 296 assert (abbr_idx < (1 << DIE_ABBR_IDX_BITSIZE)); 297 m_abbr_idx = abbr_idx; 298 if (abbr_idx) 299 { 300 const DWARFAbbreviationDeclaration *abbrevDecl = cu->GetAbbreviations()->GetAbbreviationDeclaration(abbr_idx); 301 302 if (abbrevDecl) 303 { 304 m_tag = abbrevDecl->Tag(); 305 m_has_children = abbrevDecl->HasChildren(); 306 307 bool isCompileUnitTag = m_tag == DW_TAG_compile_unit; 308 if (cu && isCompileUnitTag) 309 ((DWARFCompileUnit*)cu)->SetBaseAddress(0); 310 311 // Skip all data in the .debug_info for the attributes 312 const uint32_t numAttributes = abbrevDecl->NumAttributes(); 313 uint32_t i; 314 dw_attr_t attr; 315 dw_form_t form; 316 for (i=0; i<numAttributes; ++i) 317 { 318 abbrevDecl->GetAttrAndFormByIndexUnchecked(i, attr, form); 319 320 if (isCompileUnitTag && ((attr == DW_AT_entry_pc) || (attr == DW_AT_low_pc))) 321 { 322 DWARFFormValue form_value(cu, form); 323 if (form_value.ExtractValue(debug_info_data, &offset)) 324 { 325 if (attr == DW_AT_low_pc || attr == DW_AT_entry_pc) 326 ((DWARFCompileUnit*)cu)->SetBaseAddress(form_value.Unsigned()); 327 } 328 } 329 else 330 { 331 bool form_is_indirect = false; 332 do 333 { 334 form_is_indirect = false; 335 uint32_t form_size = 0; 336 switch (form) 337 { 338 // Blocks if inlined data that have a length field and the data bytes 339 // inlined in the .debug_info 340 case DW_FORM_exprloc : 341 case DW_FORM_block : form_size = debug_info_data.GetULEB128(&offset); break; 342 case DW_FORM_block1 : form_size = debug_info_data.GetU8(&offset); break; 343 case DW_FORM_block2 : form_size = debug_info_data.GetU16(&offset); break; 344 case DW_FORM_block4 : form_size = debug_info_data.GetU32(&offset); break; 345 346 // Inlined NULL terminated C-strings 347 case DW_FORM_string : debug_info_data.GetCStr(&offset); break; 348 349 // Compile unit address sized values 350 case DW_FORM_addr : 351 form_size = cu->GetAddressByteSize(); 352 break; 353 case DW_FORM_ref_addr : 354 if (cu->GetVersion() <= 2) 355 form_size = cu->GetAddressByteSize(); 356 else 357 form_size = cu->IsDWARF64() ? 8 : 4; 358 break; 359 360 // 0 sized form 361 case DW_FORM_flag_present: 362 form_size = 0; 363 break; 364 365 // 1 byte values 366 case DW_FORM_data1 : 367 case DW_FORM_flag : 368 case DW_FORM_ref1 : 369 form_size = 1; 370 break; 371 372 // 2 byte values 373 case DW_FORM_data2 : 374 case DW_FORM_ref2 : 375 form_size = 2; 376 break; 377 378 // 4 byte values 379 case DW_FORM_data4 : 380 case DW_FORM_ref4 : 381 form_size = 4; 382 break; 383 384 // 8 byte values 385 case DW_FORM_data8 : 386 case DW_FORM_ref8 : 387 case DW_FORM_ref_sig8 : 388 form_size = 8; 389 break; 390 391 // signed or unsigned LEB 128 values 392 case DW_FORM_sdata : 393 case DW_FORM_udata : 394 case DW_FORM_ref_udata : 395 debug_info_data.Skip_LEB128(&offset); 396 break; 397 398 case DW_FORM_indirect : 399 form = debug_info_data.GetULEB128(&offset); 400 form_is_indirect = true; 401 break; 402 403 case DW_FORM_strp : 404 case DW_FORM_sec_offset : 405 if (cu->IsDWARF64 ()) 406 debug_info_data.GetU64 (offset_ptr); 407 else 408 debug_info_data.GetU32 (offset_ptr); 409 break; 410 411 default: 412 *offset_ptr = offset; 413 return false; 414 } 415 416 offset += form_size; 417 } while (form_is_indirect); 418 } 419 } 420 *offset_ptr = offset; 421 return true; 422 } 423 } 424 else 425 { 426 m_tag = 0; 427 m_has_children = false; 428 *offset_ptr = offset; 429 return true; // NULL debug tag entry 430 } 431 } 432 433 return false; 434} 435 436//---------------------------------------------------------------------- 437// DumpAncestry 438// 439// Dumps all of a debug information entries parents up until oldest and 440// all of it's attributes to the specified stream. 441//---------------------------------------------------------------------- 442void 443DWARFDebugInfoEntry::DumpAncestry 444( 445 SymbolFileDWARF* dwarf2Data, 446 const DWARFCompileUnit* cu, 447 const DWARFDebugInfoEntry* oldest, 448 Stream &s, 449 uint32_t recurse_depth 450) const 451{ 452 const DWARFDebugInfoEntry* parent = GetParent(); 453 if (parent && parent != oldest) 454 parent->DumpAncestry(dwarf2Data, cu, oldest, s, 0); 455 Dump(dwarf2Data, cu, s, recurse_depth); 456} 457 458//---------------------------------------------------------------------- 459// Compare two DIE by comparing all their attributes values, and 460// following all DW_FORM_ref attributes and comparing their contents as 461// well (except for DW_AT_sibling attributes. 462// 463// DWARFDebugInfoEntry::CompareState compare_state; 464// int result = DWARFDebugInfoEntry::Compare(this, 0x00017ccb, 0x0001eb2b, compare_state, false, true); 465//---------------------------------------------------------------------- 466//int 467//DWARFDebugInfoEntry::Compare 468//( 469// SymbolFileDWARF* dwarf2Data, 470// dw_offset_t a_die_offset, 471// dw_offset_t b_die_offset, 472// CompareState &compare_state, 473// bool compare_siblings, 474// bool compare_children 475//) 476//{ 477// if (a_die_offset == b_die_offset) 478// return 0; 479// 480// DWARFCompileUnitSP a_cu_sp; 481// DWARFCompileUnitSP b_cu_sp; 482// const DWARFDebugInfoEntry* a_die = dwarf2Data->DebugInfo()->GetDIEPtr(a_die_offset, &a_cu_sp); 483// const DWARFDebugInfoEntry* b_die = dwarf2Data->DebugInfo()->GetDIEPtr(b_die_offset, &b_cu_sp); 484// 485// return Compare(dwarf2Data, a_cu_sp.get(), a_die, b_cu_sp.get(), b_die, compare_state, compare_siblings, compare_children); 486//} 487// 488//int 489//DWARFDebugInfoEntry::Compare 490//( 491// SymbolFileDWARF* dwarf2Data, 492// DWARFCompileUnit* a_cu, const DWARFDebugInfoEntry* a_die, 493// DWARFCompileUnit* b_cu, const DWARFDebugInfoEntry* b_die, 494// CompareState &compare_state, 495// bool compare_siblings, 496// bool compare_children 497//) 498//{ 499// if (a_die == b_die) 500// return 0; 501// 502// if (!compare_state.AddTypePair(a_die->GetOffset(), b_die->GetOffset())) 503// { 504// // We are already comparing both of these types, so let 505// // compares complete for the real result 506// return 0; 507// } 508// 509// //printf("DWARFDebugInfoEntry::Compare(0x%8.8x, 0x%8.8x)\n", a_die->GetOffset(), b_die->GetOffset()); 510// 511// // Do we have two valid DIEs? 512// if (a_die && b_die) 513// { 514// // Both DIE are valid 515// int result = 0; 516// 517// const dw_tag_t a_tag = a_die->Tag(); 518// const dw_tag_t b_tag = b_die->Tag(); 519// if (a_tag == 0 && b_tag == 0) 520// return 0; 521// 522// //printf(" comparing tags: %s and %s\n", DW_TAG_value_to_name(a_tag), DW_TAG_value_to_name(b_tag)); 523// 524// if (a_tag < b_tag) 525// return -1; 526// else if (a_tag > b_tag) 527// return 1; 528// 529// DWARFDebugInfoEntry::Attributes a_attrs; 530// DWARFDebugInfoEntry::Attributes b_attrs; 531// size_t a_attr_count = a_die->GetAttributes(dwarf2Data, a_cu, a_attrs); 532// size_t b_attr_count = b_die->GetAttributes(dwarf2Data, b_cu, b_attrs); 533// if (a_attr_count != b_attr_count) 534// { 535// a_attrs.RemoveAttribute(DW_AT_sibling); 536// b_attrs.RemoveAttribute(DW_AT_sibling); 537// } 538// 539// a_attr_count = a_attrs.Size(); 540// b_attr_count = b_attrs.Size(); 541// 542// DWARFFormValue a_form_value; 543// DWARFFormValue b_form_value; 544// 545// if (a_attr_count != b_attr_count) 546// { 547// uint32_t is_decl_index = a_attrs.FindAttributeIndex(DW_AT_declaration); 548// uint32_t a_name_index = UINT32_MAX; 549// uint32_t b_name_index = UINT32_MAX; 550// if (is_decl_index != UINT32_MAX) 551// { 552// if (a_attr_count == 2) 553// { 554// a_name_index = a_attrs.FindAttributeIndex(DW_AT_name); 555// b_name_index = b_attrs.FindAttributeIndex(DW_AT_name); 556// } 557// } 558// else 559// { 560// is_decl_index = b_attrs.FindAttributeIndex(DW_AT_declaration); 561// if (is_decl_index != UINT32_MAX && a_attr_count == 2) 562// { 563// a_name_index = a_attrs.FindAttributeIndex(DW_AT_name); 564// b_name_index = b_attrs.FindAttributeIndex(DW_AT_name); 565// } 566// } 567// if (a_name_index != UINT32_MAX && b_name_index != UINT32_MAX) 568// { 569// if (a_attrs.ExtractFormValueAtIndex(dwarf2Data, a_name_index, a_form_value) && 570// b_attrs.ExtractFormValueAtIndex(dwarf2Data, b_name_index, b_form_value)) 571// { 572// result = DWARFFormValue::Compare (a_form_value, b_form_value, a_cu, b_cu, &dwarf2Data->get_debug_str_data()); 573// if (result == 0) 574// { 575// a_attr_count = b_attr_count = 0; 576// compare_children = false; 577// } 578// } 579// } 580// } 581// 582// if (a_attr_count < b_attr_count) 583// return -1; 584// if (a_attr_count > b_attr_count) 585// return 1; 586// 587// 588// // The number of attributes are the same... 589// if (a_attr_count > 0) 590// { 591// const DWARFDataExtractor* debug_str_data_ptr = &dwarf2Data->get_debug_str_data(); 592// 593// uint32_t i; 594// for (i=0; i<a_attr_count; ++i) 595// { 596// const dw_attr_t a_attr = a_attrs.AttributeAtIndex(i); 597// const dw_attr_t b_attr = b_attrs.AttributeAtIndex(i); 598// //printf(" comparing attributes\n\t\t0x%8.8x: %s %s\t\t0x%8.8x: %s %s\n", 599// // a_attrs.DIEOffsetAtIndex(i), DW_FORM_value_to_name(a_attrs.FormAtIndex(i)), DW_AT_value_to_name(a_attr), 600// // b_attrs.DIEOffsetAtIndex(i), DW_FORM_value_to_name(b_attrs.FormAtIndex(i)), DW_AT_value_to_name(b_attr)); 601// 602// if (a_attr < b_attr) 603// return -1; 604// else if (a_attr > b_attr) 605// return 1; 606// 607// switch (a_attr) 608// { 609// // Since we call a form of GetAttributes which inlines the 610// // attributes from DW_AT_abstract_origin and DW_AT_specification 611// // we don't care if their values mismatch... 612// case DW_AT_abstract_origin: 613// case DW_AT_specification: 614// case DW_AT_sibling: 615// case DW_AT_containing_type: 616// //printf(" action = IGNORE\n"); 617// result = 0; 618// break; // ignore 619// 620// default: 621// if (a_attrs.ExtractFormValueAtIndex(dwarf2Data, i, a_form_value) && 622// b_attrs.ExtractFormValueAtIndex(dwarf2Data, i, b_form_value)) 623// result = DWARFFormValue::Compare (a_form_value, b_form_value, a_cu, b_cu, debug_str_data_ptr); 624// break; 625// } 626// 627// //printf("\t result = %i\n", result); 628// 629// if (result != 0) 630// { 631// // Attributes weren't equal, lets see if we care? 632// switch (a_attr) 633// { 634// case DW_AT_decl_file: 635// // TODO: add the ability to compare files in two different compile units 636// if (a_cu == b_cu) 637// { 638// //printf(" action = RETURN RESULT\n"); 639// return result; // Only return the compare results when the compile units are the same and the decl_file attributes can be compared 640// } 641// else 642// { 643// result = 0; 644// //printf(" action = IGNORE\n"); 645// } 646// break; 647// 648// default: 649// switch (a_attrs.FormAtIndex(i)) 650// { 651// case DW_FORM_ref1: 652// case DW_FORM_ref2: 653// case DW_FORM_ref4: 654// case DW_FORM_ref8: 655// case DW_FORM_ref_udata: 656// case DW_FORM_ref_addr: 657// //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)); 658// // These attribute values refer to other DIEs, so lets compare those instead of their DIE offsets... 659// result = Compare(dwarf2Data, a_form_value.Reference(a_cu), b_form_value.Reference(b_cu), compare_state, false, true); 660// if (result != 0) 661// return result; 662// break; 663// 664// default: 665// // We do care that they were different, return this result... 666// //printf(" action = RETURN RESULT\n"); 667// return result; 668// } 669// } 670// } 671// } 672// } 673// //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)); 674// 675// if (compare_children) 676// { 677// bool a_has_children = a_die->HasChildren(); 678// bool b_has_children = b_die->HasChildren(); 679// if (a_has_children == b_has_children) 680// { 681// // Both either have kids or don't 682// if (a_has_children) 683// result = Compare( dwarf2Data, 684// a_cu, a_die->GetFirstChild(), 685// b_cu, b_die->GetFirstChild(), 686// compare_state, true, compare_children); 687// else 688// result = 0; 689// } 690// else if (!a_has_children) 691// result = -1; // A doesn't have kids, but B does 692// else 693// result = 1; // A has kids, but B doesn't 694// } 695// 696// if (compare_siblings) 697// { 698// result = Compare( dwarf2Data, 699// a_cu, a_die->GetSibling(), 700// b_cu, b_die->GetSibling(), 701// compare_state, true, compare_children); 702// } 703// 704// return result; 705// } 706// 707// if (a_die == NULL) 708// return -1; // a_die is NULL, yet b_die is non-NULL 709// else 710// return 1; // a_die is non-NULL, yet b_die is NULL 711// 712//} 713// 714// 715//int 716//DWARFDebugInfoEntry::Compare 717//( 718// SymbolFileDWARF* dwarf2Data, 719// const DWARFCompileUnit* cu_a, 720// const DWARFDebugInfoEntry* die_a, 721// const DWARFCompileUnit* cu_a, 722// const DWARFDebugInfoEntry* die_b, 723// CompareState &compare_state 724//) 725//{ 726//} 727 728//---------------------------------------------------------------------- 729// GetDIENamesAndRanges 730// 731// Gets the valid address ranges for a given DIE by looking for a 732// DW_AT_low_pc/DW_AT_high_pc pair, DW_AT_entry_pc, or DW_AT_ranges 733// attributes. 734//---------------------------------------------------------------------- 735bool 736DWARFDebugInfoEntry::GetDIENamesAndRanges 737( 738 SymbolFileDWARF* dwarf2Data, 739 const DWARFCompileUnit* cu, 740 const char * &name, 741 const char * &mangled, 742 DWARFDebugRanges::RangeList& ranges, 743 int& decl_file, 744 int& decl_line, 745 int& decl_column, 746 int& call_file, 747 int& call_line, 748 int& call_column, 749 DWARFExpression *frame_base 750) const 751{ 752 if (dwarf2Data == NULL) 753 return false; 754 755 dw_addr_t lo_pc = LLDB_INVALID_ADDRESS; 756 dw_addr_t hi_pc = LLDB_INVALID_ADDRESS; 757 std::vector<dw_offset_t> die_offsets; 758 bool set_frame_base_loclist_addr = false; 759 760 lldb::offset_t offset; 761 const DWARFAbbreviationDeclaration* abbrevDecl = GetAbbreviationDeclarationPtr(dwarf2Data, cu, offset); 762 763 lldb::ModuleSP module = dwarf2Data->GetObjectFile()->GetModule(); 764 765 if (abbrevDecl) 766 { 767 const DWARFDataExtractor& debug_info_data = dwarf2Data->get_debug_info_data(); 768 769 if (!debug_info_data.ValidOffset(offset)) 770 return false; 771 772 const uint32_t numAttributes = abbrevDecl->NumAttributes(); 773 uint32_t i; 774 dw_attr_t attr; 775 dw_form_t form; 776 bool do_offset = false; 777 778 for (i=0; i<numAttributes; ++i) 779 { 780 abbrevDecl->GetAttrAndFormByIndexUnchecked(i, attr, form); 781 DWARFFormValue form_value(cu, form); 782 if (form_value.ExtractValue(debug_info_data, &offset)) 783 { 784 switch (attr) 785 { 786 case DW_AT_low_pc: 787 lo_pc = form_value.Unsigned(); 788 789 if (do_offset) 790 hi_pc += lo_pc; 791 do_offset = false; 792 break; 793 794 case DW_AT_entry_pc: 795 lo_pc = form_value.Unsigned(); 796 break; 797 798 case DW_AT_high_pc: 799 hi_pc = form_value.Unsigned(); 800 if (form_value.Form() != DW_FORM_addr) 801 { 802 if (lo_pc == LLDB_INVALID_ADDRESS) 803 do_offset = hi_pc != LLDB_INVALID_ADDRESS; 804 else 805 hi_pc += lo_pc; // DWARF 4 introduces <offset-from-lo-pc> to save on relocations 806 } 807 break; 808 809 case DW_AT_ranges: 810 { 811 const DWARFDebugRanges* debug_ranges = dwarf2Data->DebugRanges(); 812 debug_ranges->FindRanges(form_value.Unsigned(), ranges); 813 // All DW_AT_ranges are relative to the base address of the 814 // compile unit. We add the compile unit base address to make 815 // sure all the addresses are properly fixed up. 816 ranges.Slide(cu->GetBaseAddress()); 817 } 818 break; 819 820 case DW_AT_name: 821 if (name == NULL) 822 name = form_value.AsCString(&dwarf2Data->get_debug_str_data()); 823 break; 824 825 case DW_AT_MIPS_linkage_name: 826 case DW_AT_linkage_name: 827 if (mangled == NULL) 828 mangled = form_value.AsCString(&dwarf2Data->get_debug_str_data()); 829 break; 830 831 case DW_AT_abstract_origin: 832 die_offsets.push_back(form_value.Reference()); 833 break; 834 835 case DW_AT_specification: 836 die_offsets.push_back(form_value.Reference()); 837 break; 838 839 case DW_AT_decl_file: 840 if (decl_file == 0) 841 decl_file = form_value.Unsigned(); 842 break; 843 844 case DW_AT_decl_line: 845 if (decl_line == 0) 846 decl_line = form_value.Unsigned(); 847 break; 848 849 case DW_AT_decl_column: 850 if (decl_column == 0) 851 decl_column = form_value.Unsigned(); 852 break; 853 854 case DW_AT_call_file: 855 if (call_file == 0) 856 call_file = form_value.Unsigned(); 857 break; 858 859 case DW_AT_call_line: 860 if (call_line == 0) 861 call_line = form_value.Unsigned(); 862 break; 863 864 case DW_AT_call_column: 865 if (call_column == 0) 866 call_column = form_value.Unsigned(); 867 break; 868 869 case DW_AT_frame_base: 870 if (frame_base) 871 { 872 if (form_value.BlockData()) 873 { 874 uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart(); 875 uint32_t block_length = form_value.Unsigned(); 876 frame_base->SetOpcodeData(module, debug_info_data, block_offset, block_length); 877 } 878 else 879 { 880 const DWARFDataExtractor &debug_loc_data = dwarf2Data->get_debug_loc_data(); 881 const dw_offset_t debug_loc_offset = form_value.Unsigned(); 882 883 size_t loc_list_length = DWARFLocationList::Size(debug_loc_data, debug_loc_offset); 884 if (loc_list_length > 0) 885 { 886 frame_base->SetOpcodeData(module, debug_loc_data, debug_loc_offset, loc_list_length); 887 if (lo_pc != LLDB_INVALID_ADDRESS) 888 { 889 assert (lo_pc >= cu->GetBaseAddress()); 890 frame_base->SetLocationListSlide(lo_pc - cu->GetBaseAddress()); 891 } 892 else 893 { 894 set_frame_base_loclist_addr = true; 895 } 896 } 897 } 898 } 899 break; 900 901 default: 902 break; 903 } 904 } 905 } 906 } 907 908 if (ranges.IsEmpty()) 909 { 910 if (lo_pc != LLDB_INVALID_ADDRESS) 911 { 912 if (hi_pc != LLDB_INVALID_ADDRESS && hi_pc > lo_pc) 913 ranges.Append(DWARFDebugRanges::Range (lo_pc, hi_pc - lo_pc)); 914 else 915 ranges.Append(DWARFDebugRanges::Range (lo_pc, 0)); 916 } 917 } 918 919 if (set_frame_base_loclist_addr) 920 { 921 dw_addr_t lowest_range_pc = ranges.GetMinRangeBase(0); 922 assert (lowest_range_pc >= cu->GetBaseAddress()); 923 frame_base->SetLocationListSlide (lowest_range_pc - cu->GetBaseAddress()); 924 } 925 926 if (ranges.IsEmpty() || name == NULL || mangled == NULL) 927 { 928 std::vector<dw_offset_t>::const_iterator pos; 929 std::vector<dw_offset_t>::const_iterator end = die_offsets.end(); 930 for (pos = die_offsets.begin(); pos != end; ++pos) 931 { 932 DWARFCompileUnitSP cu_sp_ptr; 933 const DWARFDebugInfoEntry* die = NULL; 934 dw_offset_t die_offset = *pos; 935 if (die_offset != DW_INVALID_OFFSET) 936 { 937 die = dwarf2Data->DebugInfo()->GetDIEPtr(die_offset, &cu_sp_ptr); 938 if (die) 939 die->GetDIENamesAndRanges(dwarf2Data, cu_sp_ptr.get(), name, mangled, ranges, decl_file, decl_line, decl_column, call_file, call_line, call_column); 940 } 941 } 942 } 943 return !ranges.IsEmpty(); 944} 945 946//---------------------------------------------------------------------- 947// Dump 948// 949// Dumps a debug information entry and all of it's attributes to the 950// specified stream. 951//---------------------------------------------------------------------- 952void 953DWARFDebugInfoEntry::Dump 954( 955 SymbolFileDWARF* dwarf2Data, 956 const DWARFCompileUnit* cu, 957 Stream &s, 958 uint32_t recurse_depth 959) const 960{ 961 const DWARFDataExtractor& debug_info_data = dwarf2Data->get_debug_info_data(); 962 lldb::offset_t offset = m_offset; 963 964 if (debug_info_data.ValidOffset(offset)) 965 { 966 dw_uleb128_t abbrCode = debug_info_data.GetULEB128(&offset); 967 968 s.Printf("\n0x%8.8x: ", m_offset); 969 s.Indent(); 970 if (abbrCode != m_abbr_idx) 971 { 972 s.Printf( "error: DWARF has been modified\n"); 973 } 974 else if (abbrCode) 975 { 976 const DWARFAbbreviationDeclaration* abbrevDecl = cu->GetAbbreviations()->GetAbbreviationDeclaration (abbrCode); 977 978 if (abbrevDecl) 979 { 980 s.PutCString(DW_TAG_value_to_name(abbrevDecl->Tag())); 981 s.Printf( " [%u] %c\n", abbrCode, abbrevDecl->HasChildren() ? '*':' '); 982 983 // Dump all data in the .debug_info for the attributes 984 const uint32_t numAttributes = abbrevDecl->NumAttributes(); 985 uint32_t i; 986 dw_attr_t attr; 987 dw_form_t form; 988 for (i=0; i<numAttributes; ++i) 989 { 990 abbrevDecl->GetAttrAndFormByIndexUnchecked(i, attr, form); 991 992 DumpAttribute(dwarf2Data, cu, debug_info_data, &offset, s, attr, form); 993 } 994 995 const DWARFDebugInfoEntry* child = GetFirstChild(); 996 if (recurse_depth > 0 && child) 997 { 998 s.IndentMore(); 999 1000 while (child) 1001 { 1002 child->Dump(dwarf2Data, cu, s, recurse_depth-1); 1003 child = child->GetSibling(); 1004 } 1005 s.IndentLess(); 1006 } 1007 } 1008 else 1009 s.Printf( "Abbreviation code note found in 'debug_abbrev' class for code: %u\n", abbrCode); 1010 } 1011 else 1012 { 1013 s.Printf( "NULL\n"); 1014 } 1015 } 1016} 1017 1018void 1019DWARFDebugInfoEntry::DumpLocation 1020( 1021 SymbolFileDWARF* dwarf2Data, 1022 DWARFCompileUnit* cu, 1023 Stream &s 1024) const 1025{ 1026 const DWARFDebugInfoEntry *cu_die = cu->GetCompileUnitDIEOnly(); 1027 const char *cu_name = NULL; 1028 if (cu_die != NULL) 1029 cu_name = cu_die->GetName (dwarf2Data, cu); 1030 const char *obj_file_name = NULL; 1031 ObjectFile *obj_file = dwarf2Data->GetObjectFile(); 1032 if (obj_file) 1033 obj_file_name = obj_file->GetFileSpec().GetFilename().AsCString("<Unknown>"); 1034 const char *die_name = GetName (dwarf2Data, cu); 1035 s.Printf ("0x%8.8x/0x%8.8x: %-30s (from %s in %s)", 1036 cu->GetOffset(), 1037 GetOffset(), 1038 die_name ? die_name : "", 1039 cu_name ? cu_name : "<NULL>", 1040 obj_file_name ? obj_file_name : "<NULL>"); 1041} 1042 1043//---------------------------------------------------------------------- 1044// DumpAttribute 1045// 1046// Dumps a debug information entry attribute along with it's form. Any 1047// special display of attributes is done (disassemble location lists, 1048// show enumeration values for attributes, etc). 1049//---------------------------------------------------------------------- 1050void 1051DWARFDebugInfoEntry::DumpAttribute 1052( 1053 SymbolFileDWARF* dwarf2Data, 1054 const DWARFCompileUnit* cu, 1055 const DWARFDataExtractor& debug_info_data, 1056 lldb::offset_t *offset_ptr, 1057 Stream &s, 1058 dw_attr_t attr, 1059 dw_form_t form 1060) 1061{ 1062 bool verbose = s.GetVerbose(); 1063 bool show_form = s.GetFlags().Test(DWARFDebugInfo::eDumpFlag_ShowForm); 1064 1065 const DWARFDataExtractor* debug_str_data = dwarf2Data ? &dwarf2Data->get_debug_str_data() : NULL; 1066 if (verbose) 1067 s.Offset (*offset_ptr); 1068 else 1069 s.Printf (" "); 1070 s.Indent(DW_AT_value_to_name(attr)); 1071 1072 if (show_form) 1073 { 1074 s.Printf( "[%s", DW_FORM_value_to_name(form)); 1075 } 1076 1077 DWARFFormValue form_value(cu, form); 1078 1079 if (!form_value.ExtractValue(debug_info_data, offset_ptr)) 1080 return; 1081 1082 if (show_form) 1083 { 1084 if (form == DW_FORM_indirect) 1085 { 1086 s.Printf( " [%s]", DW_FORM_value_to_name(form_value.Form())); 1087 } 1088 1089 s.PutCString("] "); 1090 } 1091 1092 s.PutCString("( "); 1093 1094 // Always dump form value if verbose is enabled 1095 if (verbose) 1096 { 1097 form_value.Dump(s, debug_str_data); 1098 } 1099 1100 1101 // Check to see if we have any special attribute formatters 1102 switch (attr) 1103 { 1104 case DW_AT_stmt_list: 1105 if ( verbose ) s.PutCString(" ( "); 1106 s.Printf( "0x%8.8" PRIx64, form_value.Unsigned()); 1107 if ( verbose ) s.PutCString(" )"); 1108 break; 1109 1110 case DW_AT_language: 1111 if ( verbose ) s.PutCString(" ( "); 1112 s.PutCString(DW_LANG_value_to_name(form_value.Unsigned())); 1113 if ( verbose ) s.PutCString(" )"); 1114 break; 1115 1116 case DW_AT_encoding: 1117 if ( verbose ) s.PutCString(" ( "); 1118 s.PutCString(DW_ATE_value_to_name(form_value.Unsigned())); 1119 if ( verbose ) s.PutCString(" )"); 1120 break; 1121 1122 case DW_AT_frame_base: 1123 case DW_AT_location: 1124 case DW_AT_data_member_location: 1125 { 1126 const uint8_t* blockData = form_value.BlockData(); 1127 if (blockData) 1128 { 1129 if (!verbose) 1130 form_value.Dump(s, debug_str_data); 1131 1132 // Location description is inlined in data in the form value 1133 DWARFDataExtractor locationData(debug_info_data, (*offset_ptr) - form_value.Unsigned(), form_value.Unsigned()); 1134 if ( verbose ) s.PutCString(" ( "); 1135 print_dwarf_expression (s, locationData, DWARFCompileUnit::GetAddressByteSize(cu), 4, false); 1136 if ( verbose ) s.PutCString(" )"); 1137 } 1138 else 1139 { 1140 // We have a location list offset as the value that is 1141 // the offset into the .debug_loc section that describes 1142 // the value over it's lifetime 1143 uint64_t debug_loc_offset = form_value.Unsigned(); 1144 if (dwarf2Data) 1145 { 1146 if ( !verbose ) 1147 form_value.Dump(s, debug_str_data); 1148 DWARFLocationList::Dump(s, cu, dwarf2Data->get_debug_loc_data(), debug_loc_offset); 1149 } 1150 else 1151 { 1152 if ( !verbose ) 1153 form_value.Dump(s, NULL); 1154 } 1155 } 1156 } 1157 break; 1158 1159 case DW_AT_abstract_origin: 1160 case DW_AT_specification: 1161 { 1162 uint64_t abstract_die_offset = form_value.Reference(); 1163 form_value.Dump(s, debug_str_data); 1164 // *ostrm_ptr << HEX32 << abstract_die_offset << " ( "; 1165 if ( verbose ) s.PutCString(" ( "); 1166 GetName(dwarf2Data, cu, abstract_die_offset, s); 1167 if ( verbose ) s.PutCString(" )"); 1168 } 1169 break; 1170 1171 case DW_AT_type: 1172 { 1173 uint64_t type_die_offset = form_value.Reference(); 1174 if (!verbose) 1175 form_value.Dump(s, debug_str_data); 1176 s.PutCString(" ( "); 1177 AppendTypeName(dwarf2Data, cu, type_die_offset, s); 1178 s.PutCString(" )"); 1179 } 1180 break; 1181 1182 case DW_AT_ranges: 1183 { 1184 if ( !verbose ) 1185 form_value.Dump(s, debug_str_data); 1186 lldb::offset_t ranges_offset = form_value.Unsigned(); 1187 dw_addr_t base_addr = cu ? cu->GetBaseAddress() : 0; 1188 if (dwarf2Data) 1189 DWARFDebugRanges::Dump(s, dwarf2Data->get_debug_ranges_data(), &ranges_offset, base_addr); 1190 } 1191 break; 1192 1193 default: 1194 if ( !verbose ) 1195 form_value.Dump(s, debug_str_data); 1196 break; 1197 } 1198 1199 s.PutCString(" )\n"); 1200} 1201 1202//---------------------------------------------------------------------- 1203// Get all attribute values for a given DIE, including following any 1204// specification or abstract origin attributes and including those in 1205// the results. Any duplicate attributes will have the first instance 1206// take precedence (this can happen for declaration attributes). 1207//---------------------------------------------------------------------- 1208size_t 1209DWARFDebugInfoEntry::GetAttributes 1210( 1211 SymbolFileDWARF* dwarf2Data, 1212 const DWARFCompileUnit* cu, 1213 const uint8_t *fixed_form_sizes, 1214 DWARFDebugInfoEntry::Attributes& attributes, 1215 uint32_t curr_depth 1216) const 1217{ 1218 lldb::offset_t offset; 1219 const DWARFAbbreviationDeclaration* abbrevDecl = GetAbbreviationDeclarationPtr(dwarf2Data, cu, offset); 1220 1221 if (abbrevDecl) 1222 { 1223 const DWARFDataExtractor& debug_info_data = dwarf2Data->get_debug_info_data(); 1224 1225 if (fixed_form_sizes == NULL) 1226 fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize(cu->GetAddressByteSize(), cu->IsDWARF64()); 1227 1228 const uint32_t num_attributes = abbrevDecl->NumAttributes(); 1229 uint32_t i; 1230 dw_attr_t attr; 1231 dw_form_t form; 1232 for (i=0; i<num_attributes; ++i) 1233 { 1234 abbrevDecl->GetAttrAndFormByIndexUnchecked (i, attr, form); 1235 1236 // If we are tracking down DW_AT_specification or DW_AT_abstract_origin 1237 // attributes, the depth will be non-zero. We need to omit certain 1238 // attributes that don't make sense. 1239 switch (attr) 1240 { 1241 case DW_AT_sibling: 1242 case DW_AT_declaration: 1243 if (curr_depth > 0) 1244 { 1245 // This attribute doesn't make sense when combined with 1246 // the DIE that references this DIE. We know a DIE is 1247 // referencing this DIE because curr_depth is not zero 1248 break; 1249 } 1250 // Fall through... 1251 default: 1252 attributes.Append(cu, offset, attr, form); 1253 break; 1254 } 1255 1256 if ((attr == DW_AT_specification) || (attr == DW_AT_abstract_origin)) 1257 { 1258 DWARFFormValue form_value (cu, form); 1259 if (form_value.ExtractValue(debug_info_data, &offset)) 1260 { 1261 const DWARFDebugInfoEntry* die = NULL; 1262 dw_offset_t die_offset = form_value.Reference(); 1263 if (cu->ContainsDIEOffset(die_offset)) 1264 { 1265 die = const_cast<DWARFCompileUnit*>(cu)->GetDIEPtr(die_offset); 1266 if (die) 1267 die->GetAttributes(dwarf2Data, cu, fixed_form_sizes, attributes, curr_depth + 1); 1268 } 1269 else 1270 { 1271 DWARFCompileUnitSP cu_sp_ptr; 1272 die = const_cast<SymbolFileDWARF*>(dwarf2Data)->DebugInfo()->GetDIEPtr(die_offset, &cu_sp_ptr); 1273 if (die) 1274 die->GetAttributes(dwarf2Data, cu_sp_ptr.get(), fixed_form_sizes, attributes, curr_depth + 1); 1275 } 1276 } 1277 } 1278 else 1279 { 1280 const uint8_t fixed_skip_size = fixed_form_sizes [form]; 1281 if (fixed_skip_size) 1282 offset += fixed_skip_size; 1283 else 1284 DWARFFormValue::SkipValue(form, debug_info_data, &offset, cu); 1285 } 1286 } 1287 } 1288 else 1289 { 1290 attributes.Clear(); 1291 } 1292 return attributes.Size(); 1293 1294} 1295 1296//---------------------------------------------------------------------- 1297// GetAttributeValue 1298// 1299// Get the value of an attribute and return the .debug_info offset of the 1300// attribute if it was properly extracted into form_value, or zero 1301// if we fail since an offset of zero is invalid for an attribute (it 1302// would be a compile unit header). 1303//---------------------------------------------------------------------- 1304dw_offset_t 1305DWARFDebugInfoEntry::GetAttributeValue 1306( 1307 SymbolFileDWARF* dwarf2Data, 1308 const DWARFCompileUnit* cu, 1309 const dw_attr_t attr, 1310 DWARFFormValue& form_value, 1311 dw_offset_t* end_attr_offset_ptr 1312) const 1313{ 1314 lldb::offset_t offset; 1315 const DWARFAbbreviationDeclaration* abbrevDecl = GetAbbreviationDeclarationPtr(dwarf2Data, cu, offset); 1316 1317 if (abbrevDecl) 1318 { 1319 uint32_t attr_idx = abbrevDecl->FindAttributeIndex(attr); 1320 1321 if (attr_idx != DW_INVALID_INDEX) 1322 { 1323 const DWARFDataExtractor& debug_info_data = dwarf2Data->get_debug_info_data(); 1324 1325 uint32_t idx=0; 1326 while (idx<attr_idx) 1327 DWARFFormValue::SkipValue(abbrevDecl->GetFormByIndex(idx++), debug_info_data, &offset, cu); 1328 1329 const dw_offset_t attr_offset = offset; 1330 form_value.SetCompileUnit(cu); 1331 form_value.SetForm(abbrevDecl->GetFormByIndex(idx)); 1332 if (form_value.ExtractValue(debug_info_data, &offset)) 1333 { 1334 if (end_attr_offset_ptr) 1335 *end_attr_offset_ptr = offset; 1336 return attr_offset; 1337 } 1338 } 1339 } 1340 1341 return 0; 1342} 1343 1344//---------------------------------------------------------------------- 1345// GetAttributeValueAsString 1346// 1347// Get the value of an attribute as a string return it. The resulting 1348// pointer to the string data exists within the supplied SymbolFileDWARF 1349// and will only be available as long as the SymbolFileDWARF is still around 1350// and it's content doesn't change. 1351//---------------------------------------------------------------------- 1352const char* 1353DWARFDebugInfoEntry::GetAttributeValueAsString 1354( 1355 SymbolFileDWARF* dwarf2Data, 1356 const DWARFCompileUnit* cu, 1357 const dw_attr_t attr, 1358 const char* fail_value) const 1359{ 1360 DWARFFormValue form_value; 1361 if (GetAttributeValue(dwarf2Data, cu, attr, form_value)) 1362 return form_value.AsCString(&dwarf2Data->get_debug_str_data()); 1363 return fail_value; 1364} 1365 1366//---------------------------------------------------------------------- 1367// GetAttributeValueAsUnsigned 1368// 1369// Get the value of an attribute as unsigned and return it. 1370//---------------------------------------------------------------------- 1371uint64_t 1372DWARFDebugInfoEntry::GetAttributeValueAsUnsigned 1373( 1374 SymbolFileDWARF* dwarf2Data, 1375 const DWARFCompileUnit* cu, 1376 const dw_attr_t attr, 1377 uint64_t fail_value 1378) const 1379{ 1380 DWARFFormValue form_value; 1381 if (GetAttributeValue(dwarf2Data, cu, attr, form_value)) 1382 return form_value.Unsigned(); 1383 return fail_value; 1384} 1385 1386//---------------------------------------------------------------------- 1387// GetAttributeValueAsSigned 1388// 1389// Get the value of an attribute a signed value and return it. 1390//---------------------------------------------------------------------- 1391int64_t 1392DWARFDebugInfoEntry::GetAttributeValueAsSigned 1393( 1394 SymbolFileDWARF* dwarf2Data, 1395 const DWARFCompileUnit* cu, 1396 const dw_attr_t attr, 1397 int64_t fail_value 1398) const 1399{ 1400 DWARFFormValue form_value; 1401 if (GetAttributeValue(dwarf2Data, cu, attr, form_value)) 1402 return form_value.Signed(); 1403 return fail_value; 1404} 1405 1406//---------------------------------------------------------------------- 1407// GetAttributeValueAsReference 1408// 1409// Get the value of an attribute as reference and fix up and compile 1410// unit relative offsets as needed. 1411//---------------------------------------------------------------------- 1412uint64_t 1413DWARFDebugInfoEntry::GetAttributeValueAsReference 1414( 1415 SymbolFileDWARF* dwarf2Data, 1416 const DWARFCompileUnit* cu, 1417 const dw_attr_t attr, 1418 uint64_t fail_value 1419) const 1420{ 1421 DWARFFormValue form_value; 1422 if (GetAttributeValue(dwarf2Data, cu, attr, form_value)) 1423 return form_value.Reference(); 1424 return fail_value; 1425} 1426 1427//---------------------------------------------------------------------- 1428// GetAttributeHighPC 1429// 1430// Get the hi_pc, adding hi_pc to lo_pc when specified 1431// as an <offset-from-low-pc>. 1432// 1433// Returns the hi_pc or fail_value. 1434//---------------------------------------------------------------------- 1435dw_addr_t 1436DWARFDebugInfoEntry::GetAttributeHighPC 1437( 1438 SymbolFileDWARF* dwarf2Data, 1439 const DWARFCompileUnit* cu, 1440 dw_addr_t lo_pc, 1441 uint64_t fail_value 1442) const 1443{ 1444 DWARFFormValue form_value; 1445 1446 if (GetAttributeValue(dwarf2Data, cu, DW_AT_high_pc, form_value)) 1447 { 1448 dw_addr_t hi_pc = form_value.Unsigned(); 1449 if (form_value.Form() != DW_FORM_addr) 1450 hi_pc += lo_pc; // DWARF4 can specify the hi_pc as an <offset-from-lowpc> 1451 return hi_pc; 1452 } 1453 return fail_value; 1454} 1455 1456//---------------------------------------------------------------------- 1457// GetAttributeAddressRange 1458// 1459// Get the lo_pc and hi_pc, adding hi_pc to lo_pc when specified 1460// as an <offset-from-low-pc>. 1461// 1462// Returns true or sets lo_pc and hi_pc to fail_value. 1463//---------------------------------------------------------------------- 1464bool 1465DWARFDebugInfoEntry::GetAttributeAddressRange 1466( 1467 SymbolFileDWARF* dwarf2Data, 1468 const DWARFCompileUnit* cu, 1469 dw_addr_t& lo_pc, 1470 dw_addr_t& hi_pc, 1471 uint64_t fail_value 1472) const 1473{ 1474 lo_pc = GetAttributeValueAsUnsigned(dwarf2Data, cu, DW_AT_low_pc, fail_value); 1475 if (lo_pc != fail_value) 1476 { 1477 hi_pc = GetAttributeHighPC(dwarf2Data, cu, lo_pc, fail_value); 1478 if (hi_pc != fail_value) 1479 return true; 1480 } 1481 lo_pc = fail_value; 1482 hi_pc = fail_value; 1483 return false; 1484} 1485 1486size_t 1487DWARFDebugInfoEntry::GetAttributeAddressRanges(SymbolFileDWARF* dwarf2Data, 1488 const DWARFCompileUnit* cu, 1489 DWARFDebugRanges::RangeList &ranges, 1490 bool check_hi_lo_pc) const 1491{ 1492 ranges.Clear(); 1493 1494 dw_offset_t ranges_offset = GetAttributeValueAsUnsigned(dwarf2Data, cu, DW_AT_ranges, DW_INVALID_OFFSET); 1495 if (ranges_offset != DW_INVALID_OFFSET) 1496 { 1497 dw_offset_t debug_ranges_offset = GetAttributeValueAsUnsigned(dwarf2Data, cu, DW_AT_ranges, DW_INVALID_OFFSET); 1498 if (debug_ranges_offset != DW_INVALID_OFFSET) 1499 { 1500 DWARFDebugRanges* debug_ranges = dwarf2Data->DebugRanges(); 1501 1502 debug_ranges->FindRanges(debug_ranges_offset, ranges); 1503 ranges.Slide (cu->GetBaseAddress()); 1504 } 1505 } 1506 else if (check_hi_lo_pc) 1507 { 1508 dw_addr_t lo_pc = LLDB_INVALID_ADDRESS; 1509 dw_addr_t hi_pc = LLDB_INVALID_ADDRESS; 1510 if (GetAttributeAddressRange (dwarf2Data, cu, lo_pc, hi_pc, LLDB_INVALID_ADDRESS)) 1511 { 1512 if (lo_pc < hi_pc) 1513 ranges.Append(DWARFDebugRanges::RangeList::Entry(lo_pc, hi_pc - lo_pc)); 1514 } 1515 } 1516 return ranges.GetSize(); 1517} 1518 1519//---------------------------------------------------------------------- 1520// GetAttributeValueAsLocation 1521// 1522// Get the value of an attribute as reference and fix up and compile 1523// unit relative offsets as needed. 1524//---------------------------------------------------------------------- 1525dw_offset_t 1526DWARFDebugInfoEntry::GetAttributeValueAsLocation 1527( 1528 SymbolFileDWARF* dwarf2Data, 1529 const DWARFCompileUnit* cu, 1530 const dw_attr_t attr, 1531 DWARFDataExtractor& location_data, 1532 uint32_t &block_size 1533) const 1534{ 1535 block_size = 0; 1536 DWARFFormValue form_value; 1537 1538 // Empty out data in case we don't find anything 1539 location_data.Clear(); 1540 dw_offset_t end_addr_offset = DW_INVALID_OFFSET; 1541 const dw_offset_t attr_offset = GetAttributeValue(dwarf2Data, cu, attr, form_value, &end_addr_offset); 1542 if (attr_offset) 1543 { 1544 const uint8_t* blockData = form_value.BlockData(); 1545 if (blockData) 1546 { 1547 // We have an inlined location list in the .debug_info section 1548 const DWARFDataExtractor& debug_info = dwarf2Data->get_debug_info_data(); 1549 dw_offset_t block_offset = blockData - debug_info.GetDataStart(); 1550 block_size = (end_addr_offset - attr_offset) - form_value.Unsigned(); 1551 location_data.SetData(debug_info, block_offset, block_size); 1552 } 1553 else 1554 { 1555 // We have a location list offset as the value that is 1556 // the offset into the .debug_loc section that describes 1557 // the value over it's lifetime 1558 lldb::offset_t debug_loc_offset = form_value.Unsigned(); 1559 if (dwarf2Data) 1560 { 1561 assert(dwarf2Data->get_debug_loc_data().GetAddressByteSize() == cu->GetAddressByteSize()); 1562 return DWARFLocationList::Extract(dwarf2Data->get_debug_loc_data(), &debug_loc_offset, location_data); 1563 } 1564 } 1565 } 1566 return attr_offset; 1567} 1568 1569//---------------------------------------------------------------------- 1570// GetName 1571// 1572// Get value of the DW_AT_name attribute and return it if one exists, 1573// else return NULL. 1574//---------------------------------------------------------------------- 1575const char* 1576DWARFDebugInfoEntry::GetName 1577( 1578 SymbolFileDWARF* dwarf2Data, 1579 const DWARFCompileUnit* cu 1580) const 1581{ 1582 DWARFFormValue form_value; 1583 if (GetAttributeValue(dwarf2Data, cu, DW_AT_name, form_value)) 1584 return form_value.AsCString(&dwarf2Data->get_debug_str_data()); 1585 else 1586 { 1587 if (GetAttributeValue(dwarf2Data, cu, DW_AT_specification, form_value)) 1588 { 1589 DWARFCompileUnitSP cu_sp_ptr; 1590 const DWARFDebugInfoEntry* die = const_cast<SymbolFileDWARF*>(dwarf2Data)->DebugInfo()->GetDIEPtr(form_value.Reference(), &cu_sp_ptr); 1591 if (die) 1592 return die->GetName(dwarf2Data, cu_sp_ptr.get()); 1593 } 1594 } 1595 return NULL; 1596} 1597 1598 1599//---------------------------------------------------------------------- 1600// GetMangledName 1601// 1602// Get value of the DW_AT_MIPS_linkage_name attribute and return it if 1603// one exists, else return the value of the DW_AT_name attribute 1604//---------------------------------------------------------------------- 1605const char* 1606DWARFDebugInfoEntry::GetMangledName 1607( 1608 SymbolFileDWARF* dwarf2Data, 1609 const DWARFCompileUnit* cu, 1610 bool substitute_name_allowed 1611) const 1612{ 1613 const char* name = NULL; 1614 DWARFFormValue form_value; 1615 1616 if (GetAttributeValue(dwarf2Data, cu, DW_AT_MIPS_linkage_name, form_value)) 1617 name = form_value.AsCString(&dwarf2Data->get_debug_str_data()); 1618 1619 if (GetAttributeValue(dwarf2Data, cu, DW_AT_linkage_name, form_value)) 1620 name = form_value.AsCString(&dwarf2Data->get_debug_str_data()); 1621 1622 if (substitute_name_allowed && name == NULL) 1623 { 1624 if (GetAttributeValue(dwarf2Data, cu, DW_AT_name, form_value)) 1625 name = form_value.AsCString(&dwarf2Data->get_debug_str_data()); 1626 } 1627 return name; 1628} 1629 1630 1631//---------------------------------------------------------------------- 1632// GetPubname 1633// 1634// Get value the name for a DIE as it should appear for a 1635// .debug_pubnames or .debug_pubtypes section. 1636//---------------------------------------------------------------------- 1637const char* 1638DWARFDebugInfoEntry::GetPubname 1639( 1640 SymbolFileDWARF* dwarf2Data, 1641 const DWARFCompileUnit* cu 1642) const 1643{ 1644 const char* name = NULL; 1645 if (!dwarf2Data) 1646 return name; 1647 1648 DWARFFormValue form_value; 1649 1650 if (GetAttributeValue(dwarf2Data, cu, DW_AT_MIPS_linkage_name, form_value)) 1651 name = form_value.AsCString(&dwarf2Data->get_debug_str_data()); 1652 else if (GetAttributeValue(dwarf2Data, cu, DW_AT_linkage_name, form_value)) 1653 name = form_value.AsCString(&dwarf2Data->get_debug_str_data()); 1654 else if (GetAttributeValue(dwarf2Data, cu, DW_AT_name, form_value)) 1655 name = form_value.AsCString(&dwarf2Data->get_debug_str_data()); 1656 else if (GetAttributeValue(dwarf2Data, cu, DW_AT_specification, form_value)) 1657 { 1658 // The specification DIE may be in another compile unit so we need 1659 // to get a die and its compile unit. 1660 DWARFCompileUnitSP cu_sp_ptr; 1661 const DWARFDebugInfoEntry* die = const_cast<SymbolFileDWARF*>(dwarf2Data)->DebugInfo()->GetDIEPtr(form_value.Reference(), &cu_sp_ptr); 1662 if (die) 1663 return die->GetPubname(dwarf2Data, cu_sp_ptr.get()); 1664 } 1665 return name; 1666} 1667 1668 1669//---------------------------------------------------------------------- 1670// GetName 1671// 1672// Get value of the DW_AT_name attribute for a debug information entry 1673// that exists at offset "die_offset" and place that value into the 1674// supplied stream object. If the DIE is a NULL object "NULL" is placed 1675// into the stream, and if no DW_AT_name attribute exists for the DIE 1676// then nothing is printed. 1677//---------------------------------------------------------------------- 1678bool 1679DWARFDebugInfoEntry::GetName 1680( 1681 SymbolFileDWARF* dwarf2Data, 1682 const DWARFCompileUnit* cu, 1683 const dw_offset_t die_offset, 1684 Stream &s 1685) 1686{ 1687 if (dwarf2Data == NULL) 1688 { 1689 s.PutCString("NULL"); 1690 return false; 1691 } 1692 1693 DWARFDebugInfoEntry die; 1694 lldb::offset_t offset = die_offset; 1695 if (die.Extract(dwarf2Data, cu, &offset)) 1696 { 1697 if (die.IsNULL()) 1698 { 1699 s.PutCString("NULL"); 1700 return true; 1701 } 1702 else 1703 { 1704 DWARFFormValue form_value; 1705 if (die.GetAttributeValue(dwarf2Data, cu, DW_AT_name, form_value)) 1706 { 1707 const char* name = form_value.AsCString(&dwarf2Data->get_debug_str_data()); 1708 if (name) 1709 { 1710 s.PutCString(name); 1711 return true; 1712 } 1713 } 1714 } 1715 } 1716 return false; 1717} 1718 1719//---------------------------------------------------------------------- 1720// AppendTypeName 1721// 1722// Follows the type name definition down through all needed tags to 1723// end up with a fully qualified type name and dump the results to 1724// the supplied stream. This is used to show the name of types given 1725// a type identifier. 1726//---------------------------------------------------------------------- 1727bool 1728DWARFDebugInfoEntry::AppendTypeName 1729( 1730 SymbolFileDWARF* dwarf2Data, 1731 const DWARFCompileUnit* cu, 1732 const dw_offset_t die_offset, 1733 Stream &s 1734) 1735{ 1736 if (dwarf2Data == NULL) 1737 { 1738 s.PutCString("NULL"); 1739 return false; 1740 } 1741 1742 DWARFDebugInfoEntry die; 1743 lldb::offset_t offset = die_offset; 1744 if (die.Extract(dwarf2Data, cu, &offset)) 1745 { 1746 if (die.IsNULL()) 1747 { 1748 s.PutCString("NULL"); 1749 return true; 1750 } 1751 else 1752 { 1753 const char* name = die.GetPubname(dwarf2Data, cu); 1754 // if (die.GetAttributeValue(dwarf2Data, cu, DW_AT_name, form_value)) 1755 // name = form_value.AsCString(&dwarf2Data->get_debug_str_data()); 1756 if (name) 1757 s.PutCString(name); 1758 else 1759 { 1760 bool result = true; 1761 const DWARFAbbreviationDeclaration* abbrevDecl = die.GetAbbreviationDeclarationPtr(dwarf2Data, cu, offset); 1762 1763 if (abbrevDecl == NULL) 1764 return false; 1765 1766 switch (abbrevDecl->Tag()) 1767 { 1768 case DW_TAG_array_type: break; // print out a "[]" after printing the full type of the element below 1769 case DW_TAG_base_type: s.PutCString("base "); break; 1770 case DW_TAG_class_type: s.PutCString("class "); break; 1771 case DW_TAG_const_type: s.PutCString("const "); break; 1772 case DW_TAG_enumeration_type: s.PutCString("enum "); break; 1773 case DW_TAG_file_type: s.PutCString("file "); break; 1774 case DW_TAG_interface_type: s.PutCString("interface "); break; 1775 case DW_TAG_packed_type: s.PutCString("packed "); break; 1776 case DW_TAG_pointer_type: break; // print out a '*' after printing the full type below 1777 case DW_TAG_ptr_to_member_type: break; // print out a '*' after printing the full type below 1778 case DW_TAG_reference_type: break; // print out a '&' after printing the full type below 1779 case DW_TAG_restrict_type: s.PutCString("restrict "); break; 1780 case DW_TAG_set_type: s.PutCString("set "); break; 1781 case DW_TAG_shared_type: s.PutCString("shared "); break; 1782 case DW_TAG_string_type: s.PutCString("string "); break; 1783 case DW_TAG_structure_type: s.PutCString("struct "); break; 1784 case DW_TAG_subrange_type: s.PutCString("subrange "); break; 1785 case DW_TAG_subroutine_type: s.PutCString("function "); break; 1786 case DW_TAG_thrown_type: s.PutCString("thrown "); break; 1787 case DW_TAG_union_type: s.PutCString("union "); break; 1788 case DW_TAG_unspecified_type: s.PutCString("unspecified "); break; 1789 case DW_TAG_volatile_type: s.PutCString("volatile "); break; 1790 default: 1791 return false; 1792 } 1793 1794 // Follow the DW_AT_type if possible 1795 DWARFFormValue form_value; 1796 if (die.GetAttributeValue(dwarf2Data, cu, DW_AT_type, form_value)) 1797 { 1798 uint64_t next_die_offset = form_value.Reference(); 1799 result = AppendTypeName(dwarf2Data, cu, next_die_offset, s); 1800 } 1801 1802 switch (abbrevDecl->Tag()) 1803 { 1804 case DW_TAG_array_type: s.PutCString("[]"); break; 1805 case DW_TAG_pointer_type: s.PutChar('*'); break; 1806 case DW_TAG_ptr_to_member_type: s.PutChar('*'); break; 1807 case DW_TAG_reference_type: s.PutChar('&'); break; 1808 default: 1809 break; 1810 } 1811 return result; 1812 } 1813 } 1814 } 1815 return false; 1816} 1817 1818bool 1819DWARFDebugInfoEntry::Contains (const DWARFDebugInfoEntry *die) const 1820{ 1821 if (die) 1822 { 1823 const dw_offset_t die_offset = die->GetOffset(); 1824 if (die_offset > GetOffset()) 1825 { 1826 const DWARFDebugInfoEntry *sibling = GetSibling(); 1827 assert (sibling); // TODO: take this out 1828 if (sibling) 1829 return die_offset < sibling->GetOffset(); 1830 } 1831 } 1832 return false; 1833} 1834 1835//---------------------------------------------------------------------- 1836// BuildAddressRangeTable 1837//---------------------------------------------------------------------- 1838void 1839DWARFDebugInfoEntry::BuildAddressRangeTable 1840( 1841 SymbolFileDWARF* dwarf2Data, 1842 const DWARFCompileUnit* cu, 1843 DWARFDebugAranges* debug_aranges 1844) const 1845{ 1846 if (m_tag) 1847 { 1848 if (m_tag == DW_TAG_subprogram) 1849 { 1850 dw_addr_t lo_pc = LLDB_INVALID_ADDRESS; 1851 dw_addr_t hi_pc = LLDB_INVALID_ADDRESS; 1852 if (GetAttributeAddressRange(dwarf2Data, cu, lo_pc, hi_pc, LLDB_INVALID_ADDRESS)) 1853 { 1854 /// 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); 1855 debug_aranges->AppendRange (cu->GetOffset(), lo_pc, hi_pc); 1856 } 1857 } 1858 1859 1860 const DWARFDebugInfoEntry* child = GetFirstChild(); 1861 while (child) 1862 { 1863 child->BuildAddressRangeTable(dwarf2Data, cu, debug_aranges); 1864 child = child->GetSibling(); 1865 } 1866 } 1867} 1868 1869//---------------------------------------------------------------------- 1870// BuildFunctionAddressRangeTable 1871// 1872// This function is very similar to the BuildAddressRangeTable function 1873// except that the actual DIE offset for the function is placed in the 1874// table instead of the compile unit offset (which is the way the 1875// standard .debug_aranges section does it). 1876//---------------------------------------------------------------------- 1877void 1878DWARFDebugInfoEntry::BuildFunctionAddressRangeTable 1879( 1880 SymbolFileDWARF* dwarf2Data, 1881 const DWARFCompileUnit* cu, 1882 DWARFDebugAranges* debug_aranges 1883) const 1884{ 1885 if (m_tag) 1886 { 1887 if (m_tag == DW_TAG_subprogram) 1888 { 1889 dw_addr_t lo_pc = LLDB_INVALID_ADDRESS; 1890 dw_addr_t hi_pc = LLDB_INVALID_ADDRESS; 1891 if (GetAttributeAddressRange(dwarf2Data, cu, lo_pc, hi_pc, LLDB_INVALID_ADDRESS)) 1892 { 1893 // printf("BuildAddressRangeTable() 0x%8.8x: [0x%16.16" PRIx64 " - 0x%16.16" PRIx64 ")\n", m_offset, lo_pc, hi_pc); // DEBUG ONLY 1894 debug_aranges->AppendRange (GetOffset(), lo_pc, hi_pc); 1895 } 1896 } 1897 1898 const DWARFDebugInfoEntry* child = GetFirstChild(); 1899 while (child) 1900 { 1901 child->BuildFunctionAddressRangeTable(dwarf2Data, cu, debug_aranges); 1902 child = child->GetSibling(); 1903 } 1904 } 1905} 1906 1907void 1908DWARFDebugInfoEntry::GetDeclContextDIEs (SymbolFileDWARF* dwarf2Data, 1909 DWARFCompileUnit* cu, 1910 DWARFDIECollection &decl_context_dies) const 1911{ 1912 const DWARFDebugInfoEntry *parent_decl_ctx_die = GetParentDeclContextDIE (dwarf2Data, cu); 1913 if (parent_decl_ctx_die && parent_decl_ctx_die != this) 1914 { 1915 decl_context_dies.Append(parent_decl_ctx_die); 1916 parent_decl_ctx_die->GetDeclContextDIEs (dwarf2Data, cu, decl_context_dies); 1917 } 1918} 1919 1920void 1921DWARFDebugInfoEntry::GetDWARFDeclContext (SymbolFileDWARF* dwarf2Data, 1922 DWARFCompileUnit* cu, 1923 DWARFDeclContext &dwarf_decl_ctx) const 1924{ 1925 const dw_tag_t tag = Tag(); 1926 if (tag != DW_TAG_compile_unit) 1927 { 1928 dwarf_decl_ctx.AppendDeclContext(tag, GetName(dwarf2Data, cu)); 1929 const DWARFDebugInfoEntry *parent_decl_ctx_die = GetParentDeclContextDIE (dwarf2Data, cu); 1930 if (parent_decl_ctx_die && parent_decl_ctx_die != this) 1931 { 1932 if (parent_decl_ctx_die->Tag() != DW_TAG_compile_unit) 1933 parent_decl_ctx_die->GetDWARFDeclContext (dwarf2Data, cu, dwarf_decl_ctx); 1934 } 1935 } 1936} 1937 1938 1939bool 1940DWARFDebugInfoEntry::MatchesDWARFDeclContext (SymbolFileDWARF* dwarf2Data, 1941 DWARFCompileUnit* cu, 1942 const DWARFDeclContext &dwarf_decl_ctx) const 1943{ 1944 1945 DWARFDeclContext this_dwarf_decl_ctx; 1946 GetDWARFDeclContext (dwarf2Data, cu, this_dwarf_decl_ctx); 1947 return this_dwarf_decl_ctx == dwarf_decl_ctx; 1948} 1949 1950const DWARFDebugInfoEntry * 1951DWARFDebugInfoEntry::GetParentDeclContextDIE (SymbolFileDWARF* dwarf2Data, 1952 DWARFCompileUnit* cu) const 1953{ 1954 DWARFDebugInfoEntry::Attributes attributes; 1955 GetAttributes(dwarf2Data, cu, NULL, attributes); 1956 return GetParentDeclContextDIE (dwarf2Data, cu, attributes); 1957} 1958 1959const DWARFDebugInfoEntry * 1960DWARFDebugInfoEntry::GetParentDeclContextDIE (SymbolFileDWARF* dwarf2Data, 1961 DWARFCompileUnit* cu, 1962 const DWARFDebugInfoEntry::Attributes& attributes) const 1963{ 1964 const DWARFDebugInfoEntry * die = this; 1965 1966 while (die != NULL) 1967 { 1968 // If this is the original DIE that we are searching for a declaration 1969 // for, then don't look in the cache as we don't want our own decl 1970 // context to be our decl context... 1971 if (die != this) 1972 { 1973 switch (die->Tag()) 1974 { 1975 case DW_TAG_compile_unit: 1976 case DW_TAG_namespace: 1977 case DW_TAG_structure_type: 1978 case DW_TAG_union_type: 1979 case DW_TAG_class_type: 1980 return die; 1981 1982 default: 1983 break; 1984 } 1985 } 1986 1987 dw_offset_t die_offset; 1988 1989 die_offset = attributes.FormValueAsUnsigned(dwarf2Data, DW_AT_specification, DW_INVALID_OFFSET); 1990 if (die_offset != DW_INVALID_OFFSET) 1991 { 1992 const DWARFDebugInfoEntry *spec_die = cu->GetDIEPtr (die_offset); 1993 if (spec_die) 1994 { 1995 const DWARFDebugInfoEntry *spec_die_decl_ctx_die = spec_die->GetParentDeclContextDIE (dwarf2Data, cu); 1996 if (spec_die_decl_ctx_die) 1997 return spec_die_decl_ctx_die; 1998 } 1999 } 2000 2001 die_offset = attributes.FormValueAsUnsigned(dwarf2Data, DW_AT_abstract_origin, DW_INVALID_OFFSET); 2002 if (die_offset != DW_INVALID_OFFSET) 2003 { 2004 const DWARFDebugInfoEntry *abs_die = cu->GetDIEPtr (die_offset); 2005 if (abs_die) 2006 { 2007 const DWARFDebugInfoEntry *abs_die_decl_ctx_die = abs_die->GetParentDeclContextDIE (dwarf2Data, cu); 2008 if (abs_die_decl_ctx_die) 2009 return abs_die_decl_ctx_die; 2010 } 2011 } 2012 2013 die = die->GetParent(); 2014 } 2015 return NULL; 2016} 2017 2018 2019const char * 2020DWARFDebugInfoEntry::GetQualifiedName (SymbolFileDWARF* dwarf2Data, 2021 DWARFCompileUnit* cu, 2022 std::string &storage) const 2023{ 2024 DWARFDebugInfoEntry::Attributes attributes; 2025 GetAttributes(dwarf2Data, cu, NULL, attributes); 2026 return GetQualifiedName (dwarf2Data, cu, attributes, storage); 2027} 2028 2029const char* 2030DWARFDebugInfoEntry::GetQualifiedName (SymbolFileDWARF* dwarf2Data, 2031 DWARFCompileUnit* cu, 2032 const DWARFDebugInfoEntry::Attributes& attributes, 2033 std::string &storage) const 2034{ 2035 2036 const char *name = GetName (dwarf2Data, cu); 2037 2038 if (name) 2039 { 2040 const DWARFDebugInfoEntry *parent_decl_ctx_die = GetParentDeclContextDIE (dwarf2Data, cu); 2041 storage.clear(); 2042 // TODO: change this to get the correct decl context parent.... 2043 while (parent_decl_ctx_die) 2044 { 2045 const dw_tag_t parent_tag = parent_decl_ctx_die->Tag(); 2046 switch (parent_tag) 2047 { 2048 case DW_TAG_namespace: 2049 { 2050 const char *namespace_name = parent_decl_ctx_die->GetName (dwarf2Data, cu); 2051 if (namespace_name) 2052 { 2053 storage.insert (0, "::"); 2054 storage.insert (0, namespace_name); 2055 } 2056 else 2057 { 2058 storage.insert (0, "(anonymous namespace)::"); 2059 } 2060 parent_decl_ctx_die = parent_decl_ctx_die->GetParentDeclContextDIE(dwarf2Data, cu); 2061 } 2062 break; 2063 2064 case DW_TAG_class_type: 2065 case DW_TAG_structure_type: 2066 case DW_TAG_union_type: 2067 { 2068 const char *class_union_struct_name = parent_decl_ctx_die->GetName (dwarf2Data, cu); 2069 2070 if (class_union_struct_name) 2071 { 2072 storage.insert (0, "::"); 2073 storage.insert (0, class_union_struct_name); 2074 } 2075 parent_decl_ctx_die = parent_decl_ctx_die->GetParentDeclContextDIE(dwarf2Data, cu); 2076 } 2077 break; 2078 2079 default: 2080 parent_decl_ctx_die = NULL; 2081 break; 2082 } 2083 } 2084 2085 if (storage.empty()) 2086 storage.append ("::"); 2087 2088 storage.append (name); 2089 } 2090 if (storage.empty()) 2091 return NULL; 2092 return storage.c_str(); 2093} 2094 2095 2096//---------------------------------------------------------------------- 2097// LookupAddress 2098//---------------------------------------------------------------------- 2099bool 2100DWARFDebugInfoEntry::LookupAddress 2101( 2102 const dw_addr_t address, 2103 SymbolFileDWARF* dwarf2Data, 2104 const DWARFCompileUnit* cu, 2105 DWARFDebugInfoEntry** function_die, 2106 DWARFDebugInfoEntry** block_die 2107) 2108{ 2109 bool found_address = false; 2110 if (m_tag) 2111 { 2112 bool check_children = false; 2113 bool match_addr_range = false; 2114 // printf("0x%8.8x: %30s: address = 0x%8.8x - ", m_offset, DW_TAG_value_to_name(tag), address); 2115 switch (m_tag) 2116 { 2117 case DW_TAG_array_type : break; 2118 case DW_TAG_class_type : check_children = true; break; 2119 case DW_TAG_entry_point : break; 2120 case DW_TAG_enumeration_type : break; 2121 case DW_TAG_formal_parameter : break; 2122 case DW_TAG_imported_declaration : break; 2123 case DW_TAG_label : break; 2124 case DW_TAG_lexical_block : check_children = true; match_addr_range = true; break; 2125 case DW_TAG_member : break; 2126 case DW_TAG_pointer_type : break; 2127 case DW_TAG_reference_type : break; 2128 case DW_TAG_compile_unit : match_addr_range = true; break; 2129 case DW_TAG_string_type : break; 2130 case DW_TAG_structure_type : check_children = true; break; 2131 case DW_TAG_subroutine_type : break; 2132 case DW_TAG_typedef : break; 2133 case DW_TAG_union_type : break; 2134 case DW_TAG_unspecified_parameters : break; 2135 case DW_TAG_variant : break; 2136 case DW_TAG_common_block : check_children = true; break; 2137 case DW_TAG_common_inclusion : break; 2138 case DW_TAG_inheritance : break; 2139 case DW_TAG_inlined_subroutine : check_children = true; match_addr_range = true; break; 2140 case DW_TAG_module : match_addr_range = true; break; 2141 case DW_TAG_ptr_to_member_type : break; 2142 case DW_TAG_set_type : break; 2143 case DW_TAG_subrange_type : break; 2144 case DW_TAG_with_stmt : break; 2145 case DW_TAG_access_declaration : break; 2146 case DW_TAG_base_type : break; 2147 case DW_TAG_catch_block : match_addr_range = true; break; 2148 case DW_TAG_const_type : break; 2149 case DW_TAG_constant : break; 2150 case DW_TAG_enumerator : break; 2151 case DW_TAG_file_type : break; 2152 case DW_TAG_friend : break; 2153 case DW_TAG_namelist : break; 2154 case DW_TAG_namelist_item : break; 2155 case DW_TAG_packed_type : break; 2156 case DW_TAG_subprogram : match_addr_range = true; break; 2157 case DW_TAG_template_type_parameter : break; 2158 case DW_TAG_template_value_parameter : break; 2159 case DW_TAG_thrown_type : break; 2160 case DW_TAG_try_block : match_addr_range = true; break; 2161 case DW_TAG_variant_part : break; 2162 case DW_TAG_variable : break; 2163 case DW_TAG_volatile_type : break; 2164 case DW_TAG_dwarf_procedure : break; 2165 case DW_TAG_restrict_type : break; 2166 case DW_TAG_interface_type : break; 2167 case DW_TAG_namespace : check_children = true; break; 2168 case DW_TAG_imported_module : break; 2169 case DW_TAG_unspecified_type : break; 2170 case DW_TAG_partial_unit : break; 2171 case DW_TAG_imported_unit : break; 2172 case DW_TAG_shared_type : break; 2173 default: break; 2174 } 2175 2176 if (match_addr_range) 2177 { 2178 dw_addr_t lo_pc = GetAttributeValueAsUnsigned(dwarf2Data, cu, DW_AT_low_pc, LLDB_INVALID_ADDRESS); 2179 if (lo_pc != LLDB_INVALID_ADDRESS) 2180 { 2181 dw_addr_t hi_pc = GetAttributeHighPC(dwarf2Data, cu, lo_pc, LLDB_INVALID_ADDRESS); 2182 if (hi_pc != LLDB_INVALID_ADDRESS) 2183 { 2184 // 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); 2185 if ((lo_pc <= address) && (address < hi_pc)) 2186 { 2187 found_address = true; 2188 // puts("***MATCH***"); 2189 switch (m_tag) 2190 { 2191 case DW_TAG_compile_unit: // File 2192 check_children = ((function_die != NULL) || (block_die != NULL)); 2193 break; 2194 2195 case DW_TAG_subprogram: // Function 2196 if (function_die) 2197 *function_die = this; 2198 check_children = (block_die != NULL); 2199 break; 2200 2201 case DW_TAG_inlined_subroutine: // Inlined Function 2202 case DW_TAG_lexical_block: // Block { } in code 2203 if (block_die) 2204 { 2205 *block_die = this; 2206 check_children = true; 2207 } 2208 break; 2209 2210 default: 2211 check_children = true; 2212 break; 2213 } 2214 } 2215 } 2216 else 2217 { // compile units may not have a valid high/low pc when there 2218 // are address gaps in subroutines so we must always search 2219 // if there is no valid high and low PC 2220 check_children = (m_tag == DW_TAG_compile_unit) && ((function_die != NULL) || (block_die != NULL)); 2221 } 2222 } 2223 else 2224 { 2225 dw_offset_t debug_ranges_offset = GetAttributeValueAsUnsigned(dwarf2Data, cu, DW_AT_ranges, DW_INVALID_OFFSET); 2226 if (debug_ranges_offset != DW_INVALID_OFFSET) 2227 { 2228 DWARFDebugRanges::RangeList ranges; 2229 DWARFDebugRanges* debug_ranges = dwarf2Data->DebugRanges(); 2230 debug_ranges->FindRanges(debug_ranges_offset, ranges); 2231 // All DW_AT_ranges are relative to the base address of the 2232 // compile unit. We add the compile unit base address to make 2233 // sure all the addresses are properly fixed up. 2234 ranges.Slide (cu->GetBaseAddress()); 2235 if (ranges.FindEntryThatContains(address)) 2236 { 2237 found_address = true; 2238 // puts("***MATCH***"); 2239 switch (m_tag) 2240 { 2241 case DW_TAG_compile_unit: // File 2242 check_children = ((function_die != NULL) || (block_die != NULL)); 2243 break; 2244 2245 case DW_TAG_subprogram: // Function 2246 if (function_die) 2247 *function_die = this; 2248 check_children = (block_die != NULL); 2249 break; 2250 2251 case DW_TAG_inlined_subroutine: // Inlined Function 2252 case DW_TAG_lexical_block: // Block { } in code 2253 if (block_die) 2254 { 2255 *block_die = this; 2256 check_children = true; 2257 } 2258 break; 2259 2260 default: 2261 check_children = true; 2262 break; 2263 } 2264 } 2265 else 2266 { 2267 check_children = false; 2268 } 2269 } 2270 } 2271 } 2272 2273 2274 if (check_children) 2275 { 2276 // printf("checking children\n"); 2277 DWARFDebugInfoEntry* child = GetFirstChild(); 2278 while (child) 2279 { 2280 if (child->LookupAddress(address, dwarf2Data, cu, function_die, block_die)) 2281 return true; 2282 child = child->GetSibling(); 2283 } 2284 } 2285 } 2286 return found_address; 2287} 2288 2289const DWARFAbbreviationDeclaration* 2290DWARFDebugInfoEntry::GetAbbreviationDeclarationPtr (SymbolFileDWARF* dwarf2Data, 2291 const DWARFCompileUnit *cu, 2292 lldb::offset_t &offset) const 2293{ 2294 if (dwarf2Data) 2295 { 2296 offset = GetOffset(); 2297 2298 const DWARFAbbreviationDeclaration* abbrev_decl = cu->GetAbbreviations()->GetAbbreviationDeclaration (m_abbr_idx); 2299 if (abbrev_decl) 2300 { 2301 // Make sure the abbreviation code still matches. If it doesn't and 2302 // the DWARF data was mmap'ed, the backing file might have been modified 2303 // which is bad news. 2304 const uint64_t abbrev_code = dwarf2Data->get_debug_info_data().GetULEB128 (&offset); 2305 2306 if (abbrev_decl->Code() == abbrev_code) 2307 return abbrev_decl; 2308 2309 dwarf2Data->GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("0x%8.8x: the DWARF debug information has been modified (abbrev code was %u, and is now %u)", 2310 GetOffset(), 2311 (uint32_t)abbrev_decl->Code(), 2312 (uint32_t)abbrev_code); 2313 } 2314 } 2315 offset = DW_INVALID_OFFSET; 2316 return NULL; 2317} 2318 2319 2320bool 2321DWARFDebugInfoEntry::OffsetLessThan (const DWARFDebugInfoEntry& a, const DWARFDebugInfoEntry& b) 2322{ 2323 return a.GetOffset() < b.GetOffset(); 2324} 2325 2326void 2327DWARFDebugInfoEntry::DumpDIECollection (Stream &strm, DWARFDebugInfoEntry::collection &die_collection) 2328{ 2329 DWARFDebugInfoEntry::const_iterator pos; 2330 DWARFDebugInfoEntry::const_iterator end = die_collection.end(); 2331 strm.PutCString("\noffset parent sibling child\n"); 2332 strm.PutCString("-------- -------- -------- --------\n"); 2333 for (pos = die_collection.begin(); pos != end; ++pos) 2334 { 2335 const DWARFDebugInfoEntry& die_ref = *pos; 2336 const DWARFDebugInfoEntry* p = die_ref.GetParent(); 2337 const DWARFDebugInfoEntry* s = die_ref.GetSibling(); 2338 const DWARFDebugInfoEntry* c = die_ref.GetFirstChild(); 2339 strm.Printf("%.8x: %.8x %.8x %.8x 0x%4.4x %s%s\n", 2340 die_ref.GetOffset(), 2341 p ? p->GetOffset() : 0, 2342 s ? s->GetOffset() : 0, 2343 c ? c->GetOffset() : 0, 2344 die_ref.Tag(), 2345 DW_TAG_value_to_name(die_ref.Tag()), 2346 die_ref.HasChildren() ? " *" : ""); 2347 } 2348} 2349 2350 2351