DWARFDebugInfoEntry.cpp revision 263363
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.SetForm(FormAtIndex(i)); 92 lldb::offset_t offset = DIEOffsetAtIndex(i); 93 return form_value.ExtractValue(dwarf2Data->get_debug_info_data(), &offset, CompileUnitAtIndex(i)); 94} 95 96uint64_t 97DWARFDebugInfoEntry::Attributes::FormValueAsUnsigned (SymbolFileDWARF* dwarf2Data, dw_attr_t attr, uint64_t fail_value) const 98{ 99 const uint32_t attr_idx = FindAttributeIndex (attr); 100 if (attr_idx != UINT32_MAX) 101 return FormValueAsUnsignedAtIndex (dwarf2Data, attr_idx, fail_value); 102 return fail_value; 103} 104 105uint64_t 106DWARFDebugInfoEntry::Attributes::FormValueAsUnsignedAtIndex(SymbolFileDWARF* dwarf2Data, uint32_t i, uint64_t fail_value) const 107{ 108 DWARFFormValue form_value; 109 if (ExtractFormValueAtIndex(dwarf2Data, i, form_value)) 110 return form_value.Reference(CompileUnitAtIndex(i)); 111 return fail_value; 112} 113 114 115 116bool 117DWARFDebugInfoEntry::FastExtract 118( 119 const DWARFDataExtractor& debug_info_data, 120 const DWARFCompileUnit* cu, 121 const uint8_t *fixed_form_sizes, 122 lldb::offset_t *offset_ptr 123) 124{ 125 m_offset = *offset_ptr; 126 m_parent_idx = 0; 127 m_sibling_idx = 0; 128 m_empty_children = false; 129 const uint64_t abbr_idx = debug_info_data.GetULEB128 (offset_ptr); 130 assert (abbr_idx < (1 << DIE_ABBR_IDX_BITSIZE)); 131 m_abbr_idx = abbr_idx; 132 133 //assert (fixed_form_sizes); // For best performance this should be specified! 134 135 if (m_abbr_idx) 136 { 137 lldb::offset_t offset = *offset_ptr; 138 139 const DWARFAbbreviationDeclaration *abbrevDecl = cu->GetAbbreviations()->GetAbbreviationDeclaration(m_abbr_idx); 140 141 if (abbrevDecl == NULL) 142 { 143 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", 144 m_offset, 145 (unsigned)abbr_idx); 146 // WE can't parse anymore if the DWARF is borked... 147 *offset_ptr = UINT32_MAX; 148 return false; 149 } 150 m_tag = abbrevDecl->Tag(); 151 m_has_children = abbrevDecl->HasChildren(); 152 // Skip all data in the .debug_info for the attributes 153 const uint32_t numAttributes = abbrevDecl->NumAttributes(); 154 uint32_t i; 155 dw_form_t form; 156 for (i=0; i<numAttributes; ++i) 157 { 158 form = abbrevDecl->GetFormByIndexUnchecked(i); 159 160 const uint8_t fixed_skip_size = fixed_form_sizes [form]; 161 if (fixed_skip_size) 162 offset += fixed_skip_size; 163 else 164 { 165 bool form_is_indirect = false; 166 do 167 { 168 form_is_indirect = false; 169 uint32_t form_size = 0; 170 switch (form) 171 { 172 // Blocks if inlined data that have a length field and the data bytes 173 // inlined in the .debug_info 174 case DW_FORM_exprloc : 175 case DW_FORM_block : form_size = debug_info_data.GetULEB128 (&offset); break; 176 case DW_FORM_block1 : form_size = debug_info_data.GetU8_unchecked (&offset); break; 177 case DW_FORM_block2 : form_size = debug_info_data.GetU16_unchecked (&offset);break; 178 case DW_FORM_block4 : form_size = debug_info_data.GetU32_unchecked (&offset);break; 179 180 // Inlined NULL terminated C-strings 181 case DW_FORM_string : 182 debug_info_data.GetCStr (&offset); 183 break; 184 185 // Compile unit address sized values 186 case DW_FORM_addr : 187 form_size = cu->GetAddressByteSize(); 188 break; 189 case DW_FORM_ref_addr : 190 if (cu->GetVersion() <= 2) 191 form_size = cu->GetAddressByteSize(); 192 else 193 form_size = 4; // 4 bytes for DWARF 32, 8 bytes for DWARF 64, but we don't support DWARF64 yet 194 break; 195 196 // 0 sized form 197 case DW_FORM_flag_present: 198 form_size = 0; 199 break; 200 201 // 1 byte values 202 case DW_FORM_data1 : 203 case DW_FORM_flag : 204 case DW_FORM_ref1 : 205 form_size = 1; 206 break; 207 208 // 2 byte values 209 case DW_FORM_data2 : 210 case DW_FORM_ref2 : 211 form_size = 2; 212 break; 213 214 // 4 byte values 215 case DW_FORM_strp : 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_sec_offset : 241 if (cu->GetAddressByteSize () == 4) 242 debug_info_data.GetU32 (offset_ptr); 243 else 244 debug_info_data.GetU64 (offset_ptr); 245 break; 246 247 default: 248 *offset_ptr = m_offset; 249 return false; 250 } 251 offset += form_size; 252 253 } while (form_is_indirect); 254 } 255 } 256 *offset_ptr = offset; 257 return true; 258 } 259 else 260 { 261 m_tag = 0; 262 m_has_children = false; 263 return true; // NULL debug tag entry 264 } 265 266 return false; 267} 268 269//---------------------------------------------------------------------- 270// Extract 271// 272// Extract a debug info entry for a given compile unit from the 273// .debug_info and .debug_abbrev data within the SymbolFileDWARF class 274// starting at the given offset 275//---------------------------------------------------------------------- 276bool 277DWARFDebugInfoEntry::Extract 278( 279 SymbolFileDWARF* dwarf2Data, 280 const DWARFCompileUnit* cu, 281 lldb::offset_t *offset_ptr 282) 283{ 284 const DWARFDataExtractor& debug_info_data = dwarf2Data->get_debug_info_data(); 285// const DWARFDataExtractor& debug_str_data = dwarf2Data->get_debug_str_data(); 286 const uint32_t cu_end_offset = cu->GetNextCompileUnitOffset(); 287 const uint8_t cu_addr_size = cu->GetAddressByteSize(); 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(form); 323 if (form_value.ExtractValue(debug_info_data, &offset, cu)) 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_addr_size; 352 break; 353 case DW_FORM_ref_addr : 354 if (cu->GetVersion() <= 2) 355 form_size = cu_addr_size; 356 else 357 form_size = 4; // 4 bytes for DWARF 32, 8 bytes for DWARF 64, but we don't support DWARF64 yet 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_strp : 380 form_size = 4; 381 break; 382 383 case DW_FORM_data4 : 384 case DW_FORM_ref4 : 385 form_size = 4; 386 break; 387 388 // 8 byte values 389 case DW_FORM_data8 : 390 case DW_FORM_ref8 : 391 case DW_FORM_ref_sig8 : 392 form_size = 8; 393 break; 394 395 // signed or unsigned LEB 128 values 396 case DW_FORM_sdata : 397 case DW_FORM_udata : 398 case DW_FORM_ref_udata : 399 debug_info_data.Skip_LEB128(&offset); 400 break; 401 402 case DW_FORM_indirect : 403 form = debug_info_data.GetULEB128(&offset); 404 form_is_indirect = true; 405 break; 406 407 case DW_FORM_sec_offset : 408 if (cu->GetAddressByteSize () == 4) 409 debug_info_data.GetU32 (offset_ptr); 410 else 411 debug_info_data.GetU64 (offset_ptr); 412 break; 413 414 default: 415 *offset_ptr = offset; 416 return false; 417 } 418 419 offset += form_size; 420 } while (form_is_indirect); 421 } 422 } 423 *offset_ptr = offset; 424 return true; 425 } 426 } 427 else 428 { 429 m_tag = 0; 430 m_has_children = false; 431 *offset_ptr = offset; 432 return true; // NULL debug tag entry 433 } 434 } 435 436 return false; 437} 438 439//---------------------------------------------------------------------- 440// DumpAncestry 441// 442// Dumps all of a debug information entries parents up until oldest and 443// all of it's attributes to the specified stream. 444//---------------------------------------------------------------------- 445void 446DWARFDebugInfoEntry::DumpAncestry 447( 448 SymbolFileDWARF* dwarf2Data, 449 const DWARFCompileUnit* cu, 450 const DWARFDebugInfoEntry* oldest, 451 Stream &s, 452 uint32_t recurse_depth 453) const 454{ 455 const DWARFDebugInfoEntry* parent = GetParent(); 456 if (parent && parent != oldest) 457 parent->DumpAncestry(dwarf2Data, cu, oldest, s, 0); 458 Dump(dwarf2Data, cu, s, recurse_depth); 459} 460 461//---------------------------------------------------------------------- 462// Compare two DIE by comparing all their attributes values, and 463// following all DW_FORM_ref attributes and comparing their contents as 464// well (except for DW_AT_sibling attributes. 465// 466// DWARFDebugInfoEntry::CompareState compare_state; 467// int result = DWARFDebugInfoEntry::Compare(this, 0x00017ccb, 0x0001eb2b, compare_state, false, true); 468//---------------------------------------------------------------------- 469//int 470//DWARFDebugInfoEntry::Compare 471//( 472// SymbolFileDWARF* dwarf2Data, 473// dw_offset_t a_die_offset, 474// dw_offset_t b_die_offset, 475// CompareState &compare_state, 476// bool compare_siblings, 477// bool compare_children 478//) 479//{ 480// if (a_die_offset == b_die_offset) 481// return 0; 482// 483// DWARFCompileUnitSP a_cu_sp; 484// DWARFCompileUnitSP b_cu_sp; 485// const DWARFDebugInfoEntry* a_die = dwarf2Data->DebugInfo()->GetDIEPtr(a_die_offset, &a_cu_sp); 486// const DWARFDebugInfoEntry* b_die = dwarf2Data->DebugInfo()->GetDIEPtr(b_die_offset, &b_cu_sp); 487// 488// return Compare(dwarf2Data, a_cu_sp.get(), a_die, b_cu_sp.get(), b_die, compare_state, compare_siblings, compare_children); 489//} 490// 491//int 492//DWARFDebugInfoEntry::Compare 493//( 494// SymbolFileDWARF* dwarf2Data, 495// DWARFCompileUnit* a_cu, const DWARFDebugInfoEntry* a_die, 496// DWARFCompileUnit* b_cu, const DWARFDebugInfoEntry* b_die, 497// CompareState &compare_state, 498// bool compare_siblings, 499// bool compare_children 500//) 501//{ 502// if (a_die == b_die) 503// return 0; 504// 505// if (!compare_state.AddTypePair(a_die->GetOffset(), b_die->GetOffset())) 506// { 507// // We are already comparing both of these types, so let 508// // compares complete for the real result 509// return 0; 510// } 511// 512// //printf("DWARFDebugInfoEntry::Compare(0x%8.8x, 0x%8.8x)\n", a_die->GetOffset(), b_die->GetOffset()); 513// 514// // Do we have two valid DIEs? 515// if (a_die && b_die) 516// { 517// // Both DIE are valid 518// int result = 0; 519// 520// const dw_tag_t a_tag = a_die->Tag(); 521// const dw_tag_t b_tag = b_die->Tag(); 522// if (a_tag == 0 && b_tag == 0) 523// return 0; 524// 525// //printf(" comparing tags: %s and %s\n", DW_TAG_value_to_name(a_tag), DW_TAG_value_to_name(b_tag)); 526// 527// if (a_tag < b_tag) 528// return -1; 529// else if (a_tag > b_tag) 530// return 1; 531// 532// DWARFDebugInfoEntry::Attributes a_attrs; 533// DWARFDebugInfoEntry::Attributes b_attrs; 534// size_t a_attr_count = a_die->GetAttributes(dwarf2Data, a_cu, a_attrs); 535// size_t b_attr_count = b_die->GetAttributes(dwarf2Data, b_cu, b_attrs); 536// if (a_attr_count != b_attr_count) 537// { 538// a_attrs.RemoveAttribute(DW_AT_sibling); 539// b_attrs.RemoveAttribute(DW_AT_sibling); 540// } 541// 542// a_attr_count = a_attrs.Size(); 543// b_attr_count = b_attrs.Size(); 544// 545// DWARFFormValue a_form_value; 546// DWARFFormValue b_form_value; 547// 548// if (a_attr_count != b_attr_count) 549// { 550// uint32_t is_decl_index = a_attrs.FindAttributeIndex(DW_AT_declaration); 551// uint32_t a_name_index = UINT32_MAX; 552// uint32_t b_name_index = UINT32_MAX; 553// if (is_decl_index != UINT32_MAX) 554// { 555// if (a_attr_count == 2) 556// { 557// a_name_index = a_attrs.FindAttributeIndex(DW_AT_name); 558// b_name_index = b_attrs.FindAttributeIndex(DW_AT_name); 559// } 560// } 561// else 562// { 563// is_decl_index = b_attrs.FindAttributeIndex(DW_AT_declaration); 564// if (is_decl_index != UINT32_MAX && a_attr_count == 2) 565// { 566// a_name_index = a_attrs.FindAttributeIndex(DW_AT_name); 567// b_name_index = b_attrs.FindAttributeIndex(DW_AT_name); 568// } 569// } 570// if (a_name_index != UINT32_MAX && b_name_index != UINT32_MAX) 571// { 572// if (a_attrs.ExtractFormValueAtIndex(dwarf2Data, a_name_index, a_form_value) && 573// b_attrs.ExtractFormValueAtIndex(dwarf2Data, b_name_index, b_form_value)) 574// { 575// result = DWARFFormValue::Compare (a_form_value, b_form_value, a_cu, b_cu, &dwarf2Data->get_debug_str_data()); 576// if (result == 0) 577// { 578// a_attr_count = b_attr_count = 0; 579// compare_children = false; 580// } 581// } 582// } 583// } 584// 585// if (a_attr_count < b_attr_count) 586// return -1; 587// if (a_attr_count > b_attr_count) 588// return 1; 589// 590// 591// // The number of attributes are the same... 592// if (a_attr_count > 0) 593// { 594// const DWARFDataExtractor* debug_str_data_ptr = &dwarf2Data->get_debug_str_data(); 595// 596// uint32_t i; 597// for (i=0; i<a_attr_count; ++i) 598// { 599// const dw_attr_t a_attr = a_attrs.AttributeAtIndex(i); 600// const dw_attr_t b_attr = b_attrs.AttributeAtIndex(i); 601// //printf(" comparing attributes\n\t\t0x%8.8x: %s %s\t\t0x%8.8x: %s %s\n", 602// // a_attrs.DIEOffsetAtIndex(i), DW_FORM_value_to_name(a_attrs.FormAtIndex(i)), DW_AT_value_to_name(a_attr), 603// // b_attrs.DIEOffsetAtIndex(i), DW_FORM_value_to_name(b_attrs.FormAtIndex(i)), DW_AT_value_to_name(b_attr)); 604// 605// if (a_attr < b_attr) 606// return -1; 607// else if (a_attr > b_attr) 608// return 1; 609// 610// switch (a_attr) 611// { 612// // Since we call a form of GetAttributes which inlines the 613// // attributes from DW_AT_abstract_origin and DW_AT_specification 614// // we don't care if their values mismatch... 615// case DW_AT_abstract_origin: 616// case DW_AT_specification: 617// case DW_AT_sibling: 618// case DW_AT_containing_type: 619// //printf(" action = IGNORE\n"); 620// result = 0; 621// break; // ignore 622// 623// default: 624// if (a_attrs.ExtractFormValueAtIndex(dwarf2Data, i, a_form_value) && 625// b_attrs.ExtractFormValueAtIndex(dwarf2Data, i, b_form_value)) 626// result = DWARFFormValue::Compare (a_form_value, b_form_value, a_cu, b_cu, debug_str_data_ptr); 627// break; 628// } 629// 630// //printf("\t result = %i\n", result); 631// 632// if (result != 0) 633// { 634// // Attributes weren't equal, lets see if we care? 635// switch (a_attr) 636// { 637// case DW_AT_decl_file: 638// // TODO: add the ability to compare files in two different compile units 639// if (a_cu == b_cu) 640// { 641// //printf(" action = RETURN RESULT\n"); 642// return result; // Only return the compare results when the compile units are the same and the decl_file attributes can be compared 643// } 644// else 645// { 646// result = 0; 647// //printf(" action = IGNORE\n"); 648// } 649// break; 650// 651// default: 652// switch (a_attrs.FormAtIndex(i)) 653// { 654// case DW_FORM_ref1: 655// case DW_FORM_ref2: 656// case DW_FORM_ref4: 657// case DW_FORM_ref8: 658// case DW_FORM_ref_udata: 659// case DW_FORM_ref_addr: 660// //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)); 661// // These attribute values refer to other DIEs, so lets compare those instead of their DIE offsets... 662// result = Compare(dwarf2Data, a_form_value.Reference(a_cu), b_form_value.Reference(b_cu), compare_state, false, true); 663// if (result != 0) 664// return result; 665// break; 666// 667// default: 668// // We do care that they were different, return this result... 669// //printf(" action = RETURN RESULT\n"); 670// return result; 671// } 672// } 673// } 674// } 675// } 676// //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)); 677// 678// if (compare_children) 679// { 680// bool a_has_children = a_die->HasChildren(); 681// bool b_has_children = b_die->HasChildren(); 682// if (a_has_children == b_has_children) 683// { 684// // Both either have kids or don't 685// if (a_has_children) 686// result = Compare( dwarf2Data, 687// a_cu, a_die->GetFirstChild(), 688// b_cu, b_die->GetFirstChild(), 689// compare_state, true, compare_children); 690// else 691// result = 0; 692// } 693// else if (!a_has_children) 694// result = -1; // A doesn't have kids, but B does 695// else 696// result = 1; // A has kids, but B doesn't 697// } 698// 699// if (compare_siblings) 700// { 701// result = Compare( dwarf2Data, 702// a_cu, a_die->GetSibling(), 703// b_cu, b_die->GetSibling(), 704// compare_state, true, compare_children); 705// } 706// 707// return result; 708// } 709// 710// if (a_die == NULL) 711// return -1; // a_die is NULL, yet b_die is non-NULL 712// else 713// return 1; // a_die is non-NULL, yet b_die is NULL 714// 715//} 716// 717// 718//int 719//DWARFDebugInfoEntry::Compare 720//( 721// SymbolFileDWARF* dwarf2Data, 722// const DWARFCompileUnit* cu_a, 723// const DWARFDebugInfoEntry* die_a, 724// const DWARFCompileUnit* cu_a, 725// const DWARFDebugInfoEntry* die_b, 726// CompareState &compare_state 727//) 728//{ 729//} 730 731//---------------------------------------------------------------------- 732// GetDIENamesAndRanges 733// 734// Gets the valid address ranges for a given DIE by looking for a 735// DW_AT_low_pc/DW_AT_high_pc pair, DW_AT_entry_pc, or DW_AT_ranges 736// attributes. 737//---------------------------------------------------------------------- 738bool 739DWARFDebugInfoEntry::GetDIENamesAndRanges 740( 741 SymbolFileDWARF* dwarf2Data, 742 const DWARFCompileUnit* cu, 743 const char * &name, 744 const char * &mangled, 745 DWARFDebugRanges::RangeList& ranges, 746 int& decl_file, 747 int& decl_line, 748 int& decl_column, 749 int& call_file, 750 int& call_line, 751 int& call_column, 752 DWARFExpression *frame_base 753) const 754{ 755 if (dwarf2Data == NULL) 756 return false; 757 758 dw_addr_t lo_pc = LLDB_INVALID_ADDRESS; 759 dw_addr_t hi_pc = LLDB_INVALID_ADDRESS; 760 std::vector<dw_offset_t> die_offsets; 761 bool set_frame_base_loclist_addr = false; 762 763 lldb::offset_t offset; 764 const DWARFAbbreviationDeclaration* abbrevDecl = GetAbbreviationDeclarationPtr(dwarf2Data, cu, offset); 765 766 lldb::ModuleSP module = dwarf2Data->GetObjectFile()->GetModule(); 767 768 if (abbrevDecl) 769 { 770 const DWARFDataExtractor& debug_info_data = dwarf2Data->get_debug_info_data(); 771 772 if (!debug_info_data.ValidOffset(offset)) 773 return false; 774 775 const uint32_t numAttributes = abbrevDecl->NumAttributes(); 776 uint32_t i; 777 dw_attr_t attr; 778 dw_form_t form; 779 bool do_offset = false; 780 781 for (i=0; i<numAttributes; ++i) 782 { 783 abbrevDecl->GetAttrAndFormByIndexUnchecked(i, attr, form); 784 DWARFFormValue form_value(form); 785 if (form_value.ExtractValue(debug_info_data, &offset, cu)) 786 { 787 switch (attr) 788 { 789 case DW_AT_low_pc: 790 lo_pc = form_value.Unsigned(); 791 792 if (do_offset) 793 hi_pc += lo_pc; 794 do_offset = false; 795 break; 796 797 case DW_AT_entry_pc: 798 lo_pc = form_value.Unsigned(); 799 break; 800 801 case DW_AT_high_pc: 802 hi_pc = form_value.Unsigned(); 803 if (form_value.Form() != DW_FORM_addr) 804 { 805 if (lo_pc == LLDB_INVALID_ADDRESS) 806 do_offset = hi_pc != LLDB_INVALID_ADDRESS; 807 else 808 hi_pc += lo_pc; // DWARF 4 introduces <offset-from-lo-pc> to save on relocations 809 } 810 break; 811 812 case DW_AT_ranges: 813 { 814 const DWARFDebugRanges* debug_ranges = dwarf2Data->DebugRanges(); 815 debug_ranges->FindRanges(form_value.Unsigned(), ranges); 816 // All DW_AT_ranges are relative to the base address of the 817 // compile unit. We add the compile unit base address to make 818 // sure all the addresses are properly fixed up. 819 ranges.Slide(cu->GetBaseAddress()); 820 } 821 break; 822 823 case DW_AT_name: 824 if (name == NULL) 825 name = form_value.AsCString(&dwarf2Data->get_debug_str_data()); 826 break; 827 828 case DW_AT_MIPS_linkage_name: 829 case DW_AT_linkage_name: 830 if (mangled == NULL) 831 mangled = form_value.AsCString(&dwarf2Data->get_debug_str_data()); 832 break; 833 834 case DW_AT_abstract_origin: 835 die_offsets.push_back(form_value.Reference(cu)); 836 break; 837 838 case DW_AT_specification: 839 die_offsets.push_back(form_value.Reference(cu)); 840 break; 841 842 case DW_AT_decl_file: 843 if (decl_file == 0) 844 decl_file = form_value.Unsigned(); 845 break; 846 847 case DW_AT_decl_line: 848 if (decl_line == 0) 849 decl_line = form_value.Unsigned(); 850 break; 851 852 case DW_AT_decl_column: 853 if (decl_column == 0) 854 decl_column = form_value.Unsigned(); 855 break; 856 857 case DW_AT_call_file: 858 if (call_file == 0) 859 call_file = form_value.Unsigned(); 860 break; 861 862 case DW_AT_call_line: 863 if (call_line == 0) 864 call_line = form_value.Unsigned(); 865 break; 866 867 case DW_AT_call_column: 868 if (call_column == 0) 869 call_column = form_value.Unsigned(); 870 break; 871 872 case DW_AT_frame_base: 873 if (frame_base) 874 { 875 if (form_value.BlockData()) 876 { 877 uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart(); 878 uint32_t block_length = form_value.Unsigned(); 879 frame_base->SetOpcodeData(module, debug_info_data, block_offset, block_length); 880 } 881 else 882 { 883 const DWARFDataExtractor &debug_loc_data = dwarf2Data->get_debug_loc_data(); 884 const dw_offset_t debug_loc_offset = form_value.Unsigned(); 885 886 size_t loc_list_length = DWARFLocationList::Size(debug_loc_data, debug_loc_offset); 887 if (loc_list_length > 0) 888 { 889 frame_base->SetOpcodeData(module, debug_loc_data, debug_loc_offset, loc_list_length); 890 if (lo_pc != LLDB_INVALID_ADDRESS) 891 { 892 assert (lo_pc >= cu->GetBaseAddress()); 893 frame_base->SetLocationListSlide(lo_pc - cu->GetBaseAddress()); 894 } 895 else 896 { 897 set_frame_base_loclist_addr = true; 898 } 899 } 900 } 901 } 902 break; 903 904 default: 905 break; 906 } 907 } 908 } 909 } 910 911 if (ranges.IsEmpty()) 912 { 913 if (lo_pc != LLDB_INVALID_ADDRESS) 914 { 915 if (hi_pc != LLDB_INVALID_ADDRESS && hi_pc > lo_pc) 916 ranges.Append(DWARFDebugRanges::Range (lo_pc, hi_pc - lo_pc)); 917 else 918 ranges.Append(DWARFDebugRanges::Range (lo_pc, 0)); 919 } 920 } 921 922 if (set_frame_base_loclist_addr) 923 { 924 dw_addr_t lowest_range_pc = ranges.GetMinRangeBase(0); 925 assert (lowest_range_pc >= cu->GetBaseAddress()); 926 frame_base->SetLocationListSlide (lowest_range_pc - cu->GetBaseAddress()); 927 } 928 929 if (ranges.IsEmpty() || name == NULL || mangled == NULL) 930 { 931 std::vector<dw_offset_t>::const_iterator pos; 932 std::vector<dw_offset_t>::const_iterator end = die_offsets.end(); 933 for (pos = die_offsets.begin(); pos != end; ++pos) 934 { 935 DWARFCompileUnitSP cu_sp_ptr; 936 const DWARFDebugInfoEntry* die = NULL; 937 dw_offset_t die_offset = *pos; 938 if (die_offset != DW_INVALID_OFFSET) 939 { 940 die = dwarf2Data->DebugInfo()->GetDIEPtr(die_offset, &cu_sp_ptr); 941 if (die) 942 die->GetDIENamesAndRanges(dwarf2Data, cu_sp_ptr.get(), name, mangled, ranges, decl_file, decl_line, decl_column, call_file, call_line, call_column); 943 } 944 } 945 } 946 return !ranges.IsEmpty(); 947} 948 949//---------------------------------------------------------------------- 950// Dump 951// 952// Dumps a debug information entry and all of it's attributes to the 953// specified stream. 954//---------------------------------------------------------------------- 955void 956DWARFDebugInfoEntry::Dump 957( 958 SymbolFileDWARF* dwarf2Data, 959 const DWARFCompileUnit* cu, 960 Stream &s, 961 uint32_t recurse_depth 962) const 963{ 964 const DWARFDataExtractor& debug_info_data = dwarf2Data->get_debug_info_data(); 965 lldb::offset_t offset = m_offset; 966 967 if (debug_info_data.ValidOffset(offset)) 968 { 969 dw_uleb128_t abbrCode = debug_info_data.GetULEB128(&offset); 970 971 s.Printf("\n0x%8.8x: ", m_offset); 972 s.Indent(); 973 if (abbrCode != m_abbr_idx) 974 { 975 s.Printf( "error: DWARF has been modified\n"); 976 } 977 else if (abbrCode) 978 { 979 const DWARFAbbreviationDeclaration* abbrevDecl = cu->GetAbbreviations()->GetAbbreviationDeclaration (abbrCode); 980 981 if (abbrevDecl) 982 { 983 s.PutCString(DW_TAG_value_to_name(abbrevDecl->Tag())); 984 s.Printf( " [%u] %c\n", abbrCode, abbrevDecl->HasChildren() ? '*':' '); 985 986 // Dump all data in the .debug_info for the attributes 987 const uint32_t numAttributes = abbrevDecl->NumAttributes(); 988 uint32_t i; 989 dw_attr_t attr; 990 dw_form_t form; 991 for (i=0; i<numAttributes; ++i) 992 { 993 abbrevDecl->GetAttrAndFormByIndexUnchecked(i, attr, form); 994 995 DumpAttribute(dwarf2Data, cu, debug_info_data, &offset, s, attr, form); 996 } 997 998 const DWARFDebugInfoEntry* child = GetFirstChild(); 999 if (recurse_depth > 0 && child) 1000 { 1001 s.IndentMore(); 1002 1003 while (child) 1004 { 1005 child->Dump(dwarf2Data, cu, s, recurse_depth-1); 1006 child = child->GetSibling(); 1007 } 1008 s.IndentLess(); 1009 } 1010 } 1011 else 1012 s.Printf( "Abbreviation code note found in 'debug_abbrev' class for code: %u\n", abbrCode); 1013 } 1014 else 1015 { 1016 s.Printf( "NULL\n"); 1017 } 1018 } 1019} 1020 1021void 1022DWARFDebugInfoEntry::DumpLocation 1023( 1024 SymbolFileDWARF* dwarf2Data, 1025 DWARFCompileUnit* cu, 1026 Stream &s 1027) const 1028{ 1029 const DWARFDebugInfoEntry *cu_die = cu->GetCompileUnitDIEOnly(); 1030 const char *cu_name = NULL; 1031 if (cu_die != NULL) 1032 cu_name = cu_die->GetName (dwarf2Data, cu); 1033 const char *obj_file_name = NULL; 1034 ObjectFile *obj_file = dwarf2Data->GetObjectFile(); 1035 if (obj_file) 1036 obj_file_name = obj_file->GetFileSpec().GetFilename().AsCString(); 1037 const char *die_name = GetName (dwarf2Data, cu); 1038 s.Printf ("0x%8.8x/0x%8.8x: %-30s (from %s in %s)", 1039 cu->GetOffset(), 1040 GetOffset(), 1041 die_name ? die_name : "", 1042 cu_name ? cu_name : "<NULL>", 1043 obj_file_name ? obj_file_name : "<NULL>"); 1044} 1045 1046//---------------------------------------------------------------------- 1047// DumpAttribute 1048// 1049// Dumps a debug information entry attribute along with it's form. Any 1050// special display of attributes is done (disassemble location lists, 1051// show enumeration values for attributes, etc). 1052//---------------------------------------------------------------------- 1053void 1054DWARFDebugInfoEntry::DumpAttribute 1055( 1056 SymbolFileDWARF* dwarf2Data, 1057 const DWARFCompileUnit* cu, 1058 const DWARFDataExtractor& debug_info_data, 1059 lldb::offset_t *offset_ptr, 1060 Stream &s, 1061 dw_attr_t attr, 1062 dw_form_t form 1063) 1064{ 1065 bool verbose = s.GetVerbose(); 1066 bool show_form = s.GetFlags().Test(DWARFDebugInfo::eDumpFlag_ShowForm); 1067 1068 const DWARFDataExtractor* debug_str_data = dwarf2Data ? &dwarf2Data->get_debug_str_data() : NULL; 1069 if (verbose) 1070 s.Offset (*offset_ptr); 1071 else 1072 s.Printf (" "); 1073 s.Indent(DW_AT_value_to_name(attr)); 1074 1075 if (show_form) 1076 { 1077 s.Printf( "[%s", DW_FORM_value_to_name(form)); 1078 } 1079 1080 DWARFFormValue form_value(form); 1081 1082 if (!form_value.ExtractValue(debug_info_data, offset_ptr, cu)) 1083 return; 1084 1085 if (show_form) 1086 { 1087 if (form == DW_FORM_indirect) 1088 { 1089 s.Printf( " [%s]", DW_FORM_value_to_name(form_value.Form())); 1090 } 1091 1092 s.PutCString("] "); 1093 } 1094 1095 s.PutCString("( "); 1096 1097 // Always dump form value if verbose is enabled 1098 if (verbose) 1099 { 1100 form_value.Dump(s, debug_str_data, cu); 1101 } 1102 1103 1104 // Check to see if we have any special attribute formatters 1105 switch (attr) 1106 { 1107 case DW_AT_stmt_list: 1108 if ( verbose ) s.PutCString(" ( "); 1109 s.Printf( "0x%8.8" PRIx64, form_value.Unsigned()); 1110 if ( verbose ) s.PutCString(" )"); 1111 break; 1112 1113 case DW_AT_language: 1114 if ( verbose ) s.PutCString(" ( "); 1115 s.PutCString(DW_LANG_value_to_name(form_value.Unsigned())); 1116 if ( verbose ) s.PutCString(" )"); 1117 break; 1118 1119 case DW_AT_encoding: 1120 if ( verbose ) s.PutCString(" ( "); 1121 s.PutCString(DW_ATE_value_to_name(form_value.Unsigned())); 1122 if ( verbose ) s.PutCString(" )"); 1123 break; 1124 1125 case DW_AT_frame_base: 1126 case DW_AT_location: 1127 case DW_AT_data_member_location: 1128 { 1129 const uint8_t* blockData = form_value.BlockData(); 1130 if (blockData) 1131 { 1132 if (!verbose) 1133 form_value.Dump(s, debug_str_data, cu); 1134 1135 // Location description is inlined in data in the form value 1136 DWARFDataExtractor locationData(debug_info_data, (*offset_ptr) - form_value.Unsigned(), form_value.Unsigned()); 1137 if ( verbose ) s.PutCString(" ( "); 1138 print_dwarf_expression (s, locationData, DWARFCompileUnit::GetAddressByteSize(cu), 4, false); 1139 if ( verbose ) s.PutCString(" )"); 1140 } 1141 else 1142 { 1143 // We have a location list offset as the value that is 1144 // the offset into the .debug_loc section that describes 1145 // the value over it's lifetime 1146 uint64_t debug_loc_offset = form_value.Unsigned(); 1147 if (dwarf2Data) 1148 { 1149 if ( !verbose ) 1150 form_value.Dump(s, debug_str_data, cu); 1151 DWARFLocationList::Dump(s, cu, dwarf2Data->get_debug_loc_data(), debug_loc_offset); 1152 } 1153 else 1154 { 1155 if ( !verbose ) 1156 form_value.Dump(s, NULL, cu); 1157 } 1158 } 1159 } 1160 break; 1161 1162 case DW_AT_abstract_origin: 1163 case DW_AT_specification: 1164 { 1165 uint64_t abstract_die_offset = form_value.Reference(cu); 1166 form_value.Dump(s, debug_str_data, cu); 1167 // *ostrm_ptr << HEX32 << abstract_die_offset << " ( "; 1168 if ( verbose ) s.PutCString(" ( "); 1169 GetName(dwarf2Data, cu, abstract_die_offset, s); 1170 if ( verbose ) s.PutCString(" )"); 1171 } 1172 break; 1173 1174 case DW_AT_type: 1175 { 1176 uint64_t type_die_offset = form_value.Reference(cu); 1177 if (!verbose) 1178 form_value.Dump(s, debug_str_data, cu); 1179 s.PutCString(" ( "); 1180 AppendTypeName(dwarf2Data, cu, type_die_offset, s); 1181 s.PutCString(" )"); 1182 } 1183 break; 1184 1185 case DW_AT_ranges: 1186 { 1187 if ( !verbose ) 1188 form_value.Dump(s, debug_str_data, cu); 1189 lldb::offset_t ranges_offset = form_value.Unsigned(); 1190 dw_addr_t base_addr = cu ? cu->GetBaseAddress() : 0; 1191 if (dwarf2Data) 1192 DWARFDebugRanges::Dump(s, dwarf2Data->get_debug_ranges_data(), &ranges_offset, base_addr); 1193 } 1194 break; 1195 1196 default: 1197 if ( !verbose ) 1198 form_value.Dump(s, debug_str_data, cu); 1199 break; 1200 } 1201 1202 s.PutCString(" )\n"); 1203} 1204 1205//---------------------------------------------------------------------- 1206// Get all attribute values for a given DIE, including following any 1207// specification or abstract origin attributes and including those in 1208// the results. Any duplicate attributes will have the first instance 1209// take precedence (this can happen for declaration attributes). 1210//---------------------------------------------------------------------- 1211size_t 1212DWARFDebugInfoEntry::GetAttributes 1213( 1214 SymbolFileDWARF* dwarf2Data, 1215 const DWARFCompileUnit* cu, 1216 const uint8_t *fixed_form_sizes, 1217 DWARFDebugInfoEntry::Attributes& attributes, 1218 uint32_t curr_depth 1219) const 1220{ 1221 lldb::offset_t offset; 1222 const DWARFAbbreviationDeclaration* abbrevDecl = GetAbbreviationDeclarationPtr(dwarf2Data, cu, offset); 1223 1224 if (abbrevDecl) 1225 { 1226 const DWARFDataExtractor& debug_info_data = dwarf2Data->get_debug_info_data(); 1227 1228 if (fixed_form_sizes == NULL) 1229 fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize(cu->GetAddressByteSize()); 1230 1231 const uint32_t num_attributes = abbrevDecl->NumAttributes(); 1232 uint32_t i; 1233 dw_attr_t attr; 1234 dw_form_t form; 1235 DWARFFormValue form_value; 1236 for (i=0; i<num_attributes; ++i) 1237 { 1238 abbrevDecl->GetAttrAndFormByIndexUnchecked (i, attr, form); 1239 1240 // If we are tracking down DW_AT_specification or DW_AT_abstract_origin 1241 // attributes, the depth will be non-zero. We need to omit certain 1242 // attributes that don't make sense. 1243 switch (attr) 1244 { 1245 case DW_AT_sibling: 1246 case DW_AT_declaration: 1247 if (curr_depth > 0) 1248 { 1249 // This attribute doesn't make sense when combined with 1250 // the DIE that references this DIE. We know a DIE is 1251 // referencing this DIE because curr_depth is not zero 1252 break; 1253 } 1254 // Fall through... 1255 default: 1256 attributes.Append(cu, offset, attr, form); 1257 break; 1258 } 1259 1260 if ((attr == DW_AT_specification) || (attr == DW_AT_abstract_origin)) 1261 { 1262 form_value.SetForm(form); 1263 if (form_value.ExtractValue(debug_info_data, &offset, cu)) 1264 { 1265 const DWARFDebugInfoEntry* die = NULL; 1266 dw_offset_t die_offset = form_value.Reference(cu); 1267 if (cu->ContainsDIEOffset(die_offset)) 1268 { 1269 die = const_cast<DWARFCompileUnit*>(cu)->GetDIEPtr(die_offset); 1270 if (die) 1271 die->GetAttributes(dwarf2Data, cu, fixed_form_sizes, attributes, curr_depth + 1); 1272 } 1273 else 1274 { 1275 DWARFCompileUnitSP cu_sp_ptr; 1276 die = const_cast<SymbolFileDWARF*>(dwarf2Data)->DebugInfo()->GetDIEPtr(die_offset, &cu_sp_ptr); 1277 if (die) 1278 die->GetAttributes(dwarf2Data, cu_sp_ptr.get(), fixed_form_sizes, attributes, curr_depth + 1); 1279 } 1280 } 1281 } 1282 else 1283 { 1284 const uint8_t fixed_skip_size = fixed_form_sizes [form]; 1285 if (fixed_skip_size) 1286 offset += fixed_skip_size; 1287 else 1288 DWARFFormValue::SkipValue(form, debug_info_data, &offset, cu); 1289 } 1290 } 1291 } 1292 else 1293 { 1294 attributes.Clear(); 1295 } 1296 return attributes.Size(); 1297 1298} 1299 1300//---------------------------------------------------------------------- 1301// GetAttributeValue 1302// 1303// Get the value of an attribute and return the .debug_info offset of the 1304// attribute if it was properly extracted into form_value, or zero 1305// if we fail since an offset of zero is invalid for an attribute (it 1306// would be a compile unit header). 1307//---------------------------------------------------------------------- 1308dw_offset_t 1309DWARFDebugInfoEntry::GetAttributeValue 1310( 1311 SymbolFileDWARF* dwarf2Data, 1312 const DWARFCompileUnit* cu, 1313 const dw_attr_t attr, 1314 DWARFFormValue& form_value, 1315 dw_offset_t* end_attr_offset_ptr 1316) const 1317{ 1318 lldb::offset_t offset; 1319 const DWARFAbbreviationDeclaration* abbrevDecl = GetAbbreviationDeclarationPtr(dwarf2Data, cu, offset); 1320 1321 if (abbrevDecl) 1322 { 1323 uint32_t attr_idx = abbrevDecl->FindAttributeIndex(attr); 1324 1325 if (attr_idx != DW_INVALID_INDEX) 1326 { 1327 const DWARFDataExtractor& debug_info_data = dwarf2Data->get_debug_info_data(); 1328 1329 uint32_t idx=0; 1330 while (idx<attr_idx) 1331 DWARFFormValue::SkipValue(abbrevDecl->GetFormByIndex(idx++), debug_info_data, &offset, cu); 1332 1333 const dw_offset_t attr_offset = offset; 1334 form_value.SetForm(abbrevDecl->GetFormByIndex(idx)); 1335 if (form_value.ExtractValue(debug_info_data, &offset, cu)) 1336 { 1337 if (end_attr_offset_ptr) 1338 *end_attr_offset_ptr = offset; 1339 return attr_offset; 1340 } 1341 } 1342 } 1343 1344 return 0; 1345} 1346 1347//---------------------------------------------------------------------- 1348// GetAttributeValueAsString 1349// 1350// Get the value of an attribute as a string return it. The resulting 1351// pointer to the string data exists within the supplied SymbolFileDWARF 1352// and will only be available as long as the SymbolFileDWARF is still around 1353// and it's content doesn't change. 1354//---------------------------------------------------------------------- 1355const char* 1356DWARFDebugInfoEntry::GetAttributeValueAsString 1357( 1358 SymbolFileDWARF* dwarf2Data, 1359 const DWARFCompileUnit* cu, 1360 const dw_attr_t attr, 1361 const char* fail_value) const 1362{ 1363 DWARFFormValue form_value; 1364 if (GetAttributeValue(dwarf2Data, cu, attr, form_value)) 1365 return form_value.AsCString(&dwarf2Data->get_debug_str_data()); 1366 return fail_value; 1367} 1368 1369//---------------------------------------------------------------------- 1370// GetAttributeValueAsUnsigned 1371// 1372// Get the value of an attribute as unsigned and return it. 1373//---------------------------------------------------------------------- 1374uint64_t 1375DWARFDebugInfoEntry::GetAttributeValueAsUnsigned 1376( 1377 SymbolFileDWARF* dwarf2Data, 1378 const DWARFCompileUnit* cu, 1379 const dw_attr_t attr, 1380 uint64_t fail_value 1381) const 1382{ 1383 DWARFFormValue form_value; 1384 if (GetAttributeValue(dwarf2Data, cu, attr, form_value)) 1385 return form_value.Unsigned(); 1386 return fail_value; 1387} 1388 1389//---------------------------------------------------------------------- 1390// GetAttributeValueAsSigned 1391// 1392// Get the value of an attribute a signed value and return it. 1393//---------------------------------------------------------------------- 1394int64_t 1395DWARFDebugInfoEntry::GetAttributeValueAsSigned 1396( 1397 SymbolFileDWARF* dwarf2Data, 1398 const DWARFCompileUnit* cu, 1399 const dw_attr_t attr, 1400 int64_t fail_value 1401) const 1402{ 1403 DWARFFormValue form_value; 1404 if (GetAttributeValue(dwarf2Data, cu, attr, form_value)) 1405 return form_value.Signed(); 1406 return fail_value; 1407} 1408 1409//---------------------------------------------------------------------- 1410// GetAttributeValueAsReference 1411// 1412// Get the value of an attribute as reference and fix up and compile 1413// unit relative offsets as needed. 1414//---------------------------------------------------------------------- 1415uint64_t 1416DWARFDebugInfoEntry::GetAttributeValueAsReference 1417( 1418 SymbolFileDWARF* dwarf2Data, 1419 const DWARFCompileUnit* cu, 1420 const dw_attr_t attr, 1421 uint64_t fail_value 1422) const 1423{ 1424 DWARFFormValue form_value; 1425 if (GetAttributeValue(dwarf2Data, cu, attr, form_value)) 1426 return form_value.Reference(cu); 1427 return fail_value; 1428} 1429 1430//---------------------------------------------------------------------- 1431// GetAttributeHighPC 1432// 1433// Get the hi_pc, adding hi_pc to lo_pc when specified 1434// as an <offset-from-low-pc>. 1435// 1436// Returns the hi_pc or fail_value. 1437//---------------------------------------------------------------------- 1438dw_addr_t 1439DWARFDebugInfoEntry::GetAttributeHighPC 1440( 1441 SymbolFileDWARF* dwarf2Data, 1442 const DWARFCompileUnit* cu, 1443 dw_addr_t lo_pc, 1444 uint64_t fail_value 1445) const 1446{ 1447 DWARFFormValue form_value; 1448 1449 if (GetAttributeValue(dwarf2Data, cu, DW_AT_high_pc, form_value)) 1450 { 1451 dw_addr_t hi_pc = form_value.Unsigned(); 1452 if (form_value.Form() != DW_FORM_addr) 1453 hi_pc += lo_pc; // DWARF4 can specify the hi_pc as an <offset-from-lowpc> 1454 return hi_pc; 1455 } 1456 return fail_value; 1457} 1458 1459//---------------------------------------------------------------------- 1460// GetAttributeAddressRange 1461// 1462// Get the lo_pc and hi_pc, adding hi_pc to lo_pc when specified 1463// as an <offset-from-low-pc>. 1464// 1465// Returns true or sets lo_pc and hi_pc to fail_value. 1466//---------------------------------------------------------------------- 1467bool 1468DWARFDebugInfoEntry::GetAttributeAddressRange 1469( 1470 SymbolFileDWARF* dwarf2Data, 1471 const DWARFCompileUnit* cu, 1472 dw_addr_t& lo_pc, 1473 dw_addr_t& hi_pc, 1474 uint64_t fail_value 1475) const 1476{ 1477 lo_pc = GetAttributeValueAsUnsigned(dwarf2Data, cu, DW_AT_low_pc, fail_value); 1478 if (lo_pc != fail_value) 1479 { 1480 hi_pc = GetAttributeHighPC(dwarf2Data, cu, lo_pc, fail_value); 1481 if (hi_pc != fail_value) 1482 return true; 1483 } 1484 lo_pc = fail_value; 1485 hi_pc = fail_value; 1486 return false; 1487} 1488//---------------------------------------------------------------------- 1489// GetAttributeValueAsLocation 1490// 1491// Get the value of an attribute as reference and fix up and compile 1492// unit relative offsets as needed. 1493//---------------------------------------------------------------------- 1494dw_offset_t 1495DWARFDebugInfoEntry::GetAttributeValueAsLocation 1496( 1497 SymbolFileDWARF* dwarf2Data, 1498 const DWARFCompileUnit* cu, 1499 const dw_attr_t attr, 1500 DWARFDataExtractor& location_data, 1501 uint32_t &block_size 1502) const 1503{ 1504 block_size = 0; 1505 DWARFFormValue form_value; 1506 1507 // Empty out data in case we don't find anything 1508 location_data.Clear(); 1509 dw_offset_t end_addr_offset = DW_INVALID_OFFSET; 1510 const dw_offset_t attr_offset = GetAttributeValue(dwarf2Data, cu, attr, form_value, &end_addr_offset); 1511 if (attr_offset) 1512 { 1513 const uint8_t* blockData = form_value.BlockData(); 1514 if (blockData) 1515 { 1516 // We have an inlined location list in the .debug_info section 1517 const DWARFDataExtractor& debug_info = dwarf2Data->get_debug_info_data(); 1518 dw_offset_t block_offset = blockData - debug_info.GetDataStart(); 1519 block_size = (end_addr_offset - attr_offset) - form_value.Unsigned(); 1520 location_data.SetData(debug_info, block_offset, block_size); 1521 } 1522 else 1523 { 1524 // We have a location list offset as the value that is 1525 // the offset into the .debug_loc section that describes 1526 // the value over it's lifetime 1527 lldb::offset_t debug_loc_offset = form_value.Unsigned(); 1528 if (dwarf2Data) 1529 { 1530 assert(dwarf2Data->get_debug_loc_data().GetAddressByteSize() == cu->GetAddressByteSize()); 1531 return DWARFLocationList::Extract(dwarf2Data->get_debug_loc_data(), &debug_loc_offset, location_data); 1532 } 1533 } 1534 } 1535 return attr_offset; 1536} 1537 1538//---------------------------------------------------------------------- 1539// GetName 1540// 1541// Get value of the DW_AT_name attribute and return it if one exists, 1542// else return NULL. 1543//---------------------------------------------------------------------- 1544const char* 1545DWARFDebugInfoEntry::GetName 1546( 1547 SymbolFileDWARF* dwarf2Data, 1548 const DWARFCompileUnit* cu 1549) const 1550{ 1551 DWARFFormValue form_value; 1552 if (GetAttributeValue(dwarf2Data, cu, DW_AT_name, form_value)) 1553 return form_value.AsCString(&dwarf2Data->get_debug_str_data()); 1554 else 1555 { 1556 if (GetAttributeValue(dwarf2Data, cu, DW_AT_specification, form_value)) 1557 { 1558 DWARFCompileUnitSP cu_sp_ptr; 1559 const DWARFDebugInfoEntry* die = const_cast<SymbolFileDWARF*>(dwarf2Data)->DebugInfo()->GetDIEPtr(form_value.Reference(cu), &cu_sp_ptr); 1560 if (die) 1561 return die->GetName(dwarf2Data, cu_sp_ptr.get()); 1562 } 1563 } 1564 return NULL; 1565} 1566 1567 1568//---------------------------------------------------------------------- 1569// GetMangledName 1570// 1571// Get value of the DW_AT_MIPS_linkage_name attribute and return it if 1572// one exists, else return the value of the DW_AT_name attribute 1573//---------------------------------------------------------------------- 1574const char* 1575DWARFDebugInfoEntry::GetMangledName 1576( 1577 SymbolFileDWARF* dwarf2Data, 1578 const DWARFCompileUnit* cu, 1579 bool substitute_name_allowed 1580) const 1581{ 1582 const char* name = NULL; 1583 DWARFFormValue form_value; 1584 1585 if (GetAttributeValue(dwarf2Data, cu, DW_AT_MIPS_linkage_name, form_value)) 1586 name = form_value.AsCString(&dwarf2Data->get_debug_str_data()); 1587 1588 if (GetAttributeValue(dwarf2Data, cu, DW_AT_linkage_name, form_value)) 1589 name = form_value.AsCString(&dwarf2Data->get_debug_str_data()); 1590 1591 if (substitute_name_allowed && name == NULL) 1592 { 1593 if (GetAttributeValue(dwarf2Data, cu, DW_AT_name, form_value)) 1594 name = form_value.AsCString(&dwarf2Data->get_debug_str_data()); 1595 } 1596 return name; 1597} 1598 1599 1600//---------------------------------------------------------------------- 1601// GetPubname 1602// 1603// Get value the name for a DIE as it should appear for a 1604// .debug_pubnames or .debug_pubtypes section. 1605//---------------------------------------------------------------------- 1606const char* 1607DWARFDebugInfoEntry::GetPubname 1608( 1609 SymbolFileDWARF* dwarf2Data, 1610 const DWARFCompileUnit* cu 1611) const 1612{ 1613 const char* name = NULL; 1614 if (!dwarf2Data) 1615 return name; 1616 1617 DWARFFormValue form_value; 1618 1619 if (GetAttributeValue(dwarf2Data, cu, DW_AT_MIPS_linkage_name, form_value)) 1620 name = form_value.AsCString(&dwarf2Data->get_debug_str_data()); 1621 else if (GetAttributeValue(dwarf2Data, cu, DW_AT_linkage_name, form_value)) 1622 name = form_value.AsCString(&dwarf2Data->get_debug_str_data()); 1623 else if (GetAttributeValue(dwarf2Data, cu, DW_AT_name, form_value)) 1624 name = form_value.AsCString(&dwarf2Data->get_debug_str_data()); 1625 else if (GetAttributeValue(dwarf2Data, cu, DW_AT_specification, form_value)) 1626 { 1627 // The specification DIE may be in another compile unit so we need 1628 // to get a die and its compile unit. 1629 DWARFCompileUnitSP cu_sp_ptr; 1630 const DWARFDebugInfoEntry* die = const_cast<SymbolFileDWARF*>(dwarf2Data)->DebugInfo()->GetDIEPtr(form_value.Reference(cu), &cu_sp_ptr); 1631 if (die) 1632 return die->GetPubname(dwarf2Data, cu_sp_ptr.get()); 1633 } 1634 return name; 1635} 1636 1637 1638//---------------------------------------------------------------------- 1639// GetName 1640// 1641// Get value of the DW_AT_name attribute for a debug information entry 1642// that exists at offset "die_offset" and place that value into the 1643// supplied stream object. If the DIE is a NULL object "NULL" is placed 1644// into the stream, and if no DW_AT_name attribute exists for the DIE 1645// then nothing is printed. 1646//---------------------------------------------------------------------- 1647bool 1648DWARFDebugInfoEntry::GetName 1649( 1650 SymbolFileDWARF* dwarf2Data, 1651 const DWARFCompileUnit* cu, 1652 const dw_offset_t die_offset, 1653 Stream &s 1654) 1655{ 1656 if (dwarf2Data == NULL) 1657 { 1658 s.PutCString("NULL"); 1659 return false; 1660 } 1661 1662 DWARFDebugInfoEntry die; 1663 lldb::offset_t offset = die_offset; 1664 if (die.Extract(dwarf2Data, cu, &offset)) 1665 { 1666 if (die.IsNULL()) 1667 { 1668 s.PutCString("NULL"); 1669 return true; 1670 } 1671 else 1672 { 1673 DWARFFormValue form_value; 1674 if (die.GetAttributeValue(dwarf2Data, cu, DW_AT_name, form_value)) 1675 { 1676 const char* name = form_value.AsCString(&dwarf2Data->get_debug_str_data()); 1677 if (name) 1678 { 1679 s.PutCString(name); 1680 return true; 1681 } 1682 } 1683 } 1684 } 1685 return false; 1686} 1687 1688//---------------------------------------------------------------------- 1689// AppendTypeName 1690// 1691// Follows the type name definition down through all needed tags to 1692// end up with a fully qualified type name and dump the results to 1693// the supplied stream. This is used to show the name of types given 1694// a type identifier. 1695//---------------------------------------------------------------------- 1696bool 1697DWARFDebugInfoEntry::AppendTypeName 1698( 1699 SymbolFileDWARF* dwarf2Data, 1700 const DWARFCompileUnit* cu, 1701 const dw_offset_t die_offset, 1702 Stream &s 1703) 1704{ 1705 if (dwarf2Data == NULL) 1706 { 1707 s.PutCString("NULL"); 1708 return false; 1709 } 1710 1711 DWARFDebugInfoEntry die; 1712 lldb::offset_t offset = die_offset; 1713 if (die.Extract(dwarf2Data, cu, &offset)) 1714 { 1715 if (die.IsNULL()) 1716 { 1717 s.PutCString("NULL"); 1718 return true; 1719 } 1720 else 1721 { 1722 const char* name = die.GetPubname(dwarf2Data, cu); 1723 // if (die.GetAttributeValue(dwarf2Data, cu, DW_AT_name, form_value)) 1724 // name = form_value.AsCString(&dwarf2Data->get_debug_str_data()); 1725 if (name) 1726 s.PutCString(name); 1727 else 1728 { 1729 bool result = true; 1730 const DWARFAbbreviationDeclaration* abbrevDecl = die.GetAbbreviationDeclarationPtr(dwarf2Data, cu, offset); 1731 1732 if (abbrevDecl == NULL) 1733 return false; 1734 1735 switch (abbrevDecl->Tag()) 1736 { 1737 case DW_TAG_array_type: break; // print out a "[]" after printing the full type of the element below 1738 case DW_TAG_base_type: s.PutCString("base "); break; 1739 case DW_TAG_class_type: s.PutCString("class "); break; 1740 case DW_TAG_const_type: s.PutCString("const "); break; 1741 case DW_TAG_enumeration_type: s.PutCString("enum "); break; 1742 case DW_TAG_file_type: s.PutCString("file "); break; 1743 case DW_TAG_interface_type: s.PutCString("interface "); break; 1744 case DW_TAG_packed_type: s.PutCString("packed "); break; 1745 case DW_TAG_pointer_type: break; // print out a '*' after printing the full type below 1746 case DW_TAG_ptr_to_member_type: break; // print out a '*' after printing the full type below 1747 case DW_TAG_reference_type: break; // print out a '&' after printing the full type below 1748 case DW_TAG_restrict_type: s.PutCString("restrict "); break; 1749 case DW_TAG_set_type: s.PutCString("set "); break; 1750 case DW_TAG_shared_type: s.PutCString("shared "); break; 1751 case DW_TAG_string_type: s.PutCString("string "); break; 1752 case DW_TAG_structure_type: s.PutCString("struct "); break; 1753 case DW_TAG_subrange_type: s.PutCString("subrange "); break; 1754 case DW_TAG_subroutine_type: s.PutCString("function "); break; 1755 case DW_TAG_thrown_type: s.PutCString("thrown "); break; 1756 case DW_TAG_union_type: s.PutCString("union "); break; 1757 case DW_TAG_unspecified_type: s.PutCString("unspecified "); break; 1758 case DW_TAG_volatile_type: s.PutCString("volatile "); break; 1759 default: 1760 return false; 1761 } 1762 1763 // Follow the DW_AT_type if possible 1764 DWARFFormValue form_value; 1765 if (die.GetAttributeValue(dwarf2Data, cu, DW_AT_type, form_value)) 1766 { 1767 uint64_t next_die_offset = form_value.Reference(cu); 1768 result = AppendTypeName(dwarf2Data, cu, next_die_offset, s); 1769 } 1770 1771 switch (abbrevDecl->Tag()) 1772 { 1773 case DW_TAG_array_type: s.PutCString("[]"); break; 1774 case DW_TAG_pointer_type: s.PutChar('*'); break; 1775 case DW_TAG_ptr_to_member_type: s.PutChar('*'); break; 1776 case DW_TAG_reference_type: s.PutChar('&'); break; 1777 default: 1778 break; 1779 } 1780 return result; 1781 } 1782 } 1783 } 1784 return false; 1785} 1786 1787bool 1788DWARFDebugInfoEntry::Contains (const DWARFDebugInfoEntry *die) const 1789{ 1790 if (die) 1791 { 1792 const dw_offset_t die_offset = die->GetOffset(); 1793 if (die_offset > GetOffset()) 1794 { 1795 const DWARFDebugInfoEntry *sibling = GetSibling(); 1796 assert (sibling); // TODO: take this out 1797 if (sibling) 1798 return die_offset < sibling->GetOffset(); 1799 } 1800 } 1801 return false; 1802} 1803 1804//---------------------------------------------------------------------- 1805// BuildAddressRangeTable 1806//---------------------------------------------------------------------- 1807void 1808DWARFDebugInfoEntry::BuildAddressRangeTable 1809( 1810 SymbolFileDWARF* dwarf2Data, 1811 const DWARFCompileUnit* cu, 1812 DWARFDebugAranges* debug_aranges 1813) const 1814{ 1815 if (m_tag) 1816 { 1817 if (m_tag == DW_TAG_subprogram) 1818 { 1819 dw_addr_t lo_pc = LLDB_INVALID_ADDRESS; 1820 dw_addr_t hi_pc = LLDB_INVALID_ADDRESS; 1821 if (GetAttributeAddressRange(dwarf2Data, cu, lo_pc, hi_pc, LLDB_INVALID_ADDRESS)) 1822 { 1823 /// 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); 1824 debug_aranges->AppendRange (cu->GetOffset(), lo_pc, hi_pc); 1825 } 1826 } 1827 1828 1829 const DWARFDebugInfoEntry* child = GetFirstChild(); 1830 while (child) 1831 { 1832 child->BuildAddressRangeTable(dwarf2Data, cu, debug_aranges); 1833 child = child->GetSibling(); 1834 } 1835 } 1836} 1837 1838//---------------------------------------------------------------------- 1839// BuildFunctionAddressRangeTable 1840// 1841// This function is very similar to the BuildAddressRangeTable function 1842// except that the actual DIE offset for the function is placed in the 1843// table instead of the compile unit offset (which is the way the 1844// standard .debug_aranges section does it). 1845//---------------------------------------------------------------------- 1846void 1847DWARFDebugInfoEntry::BuildFunctionAddressRangeTable 1848( 1849 SymbolFileDWARF* dwarf2Data, 1850 const DWARFCompileUnit* cu, 1851 DWARFDebugAranges* debug_aranges 1852) const 1853{ 1854 if (m_tag) 1855 { 1856 if (m_tag == DW_TAG_subprogram) 1857 { 1858 dw_addr_t lo_pc = LLDB_INVALID_ADDRESS; 1859 dw_addr_t hi_pc = LLDB_INVALID_ADDRESS; 1860 if (GetAttributeAddressRange(dwarf2Data, cu, lo_pc, hi_pc, LLDB_INVALID_ADDRESS)) 1861 { 1862 // printf("BuildAddressRangeTable() 0x%8.8x: [0x%16.16" PRIx64 " - 0x%16.16" PRIx64 ")\n", m_offset, lo_pc, hi_pc); // DEBUG ONLY 1863 debug_aranges->AppendRange (GetOffset(), lo_pc, hi_pc); 1864 } 1865 } 1866 1867 const DWARFDebugInfoEntry* child = GetFirstChild(); 1868 while (child) 1869 { 1870 child->BuildFunctionAddressRangeTable(dwarf2Data, cu, debug_aranges); 1871 child = child->GetSibling(); 1872 } 1873 } 1874} 1875 1876void 1877DWARFDebugInfoEntry::GetDeclContextDIEs (SymbolFileDWARF* dwarf2Data, 1878 DWARFCompileUnit* cu, 1879 DWARFDIECollection &decl_context_dies) const 1880{ 1881 const DWARFDebugInfoEntry *parent_decl_ctx_die = GetParentDeclContextDIE (dwarf2Data, cu); 1882 if (parent_decl_ctx_die && parent_decl_ctx_die != this) 1883 { 1884 decl_context_dies.Append(parent_decl_ctx_die); 1885 parent_decl_ctx_die->GetDeclContextDIEs (dwarf2Data, cu, decl_context_dies); 1886 } 1887} 1888 1889void 1890DWARFDebugInfoEntry::GetDWARFDeclContext (SymbolFileDWARF* dwarf2Data, 1891 DWARFCompileUnit* cu, 1892 DWARFDeclContext &dwarf_decl_ctx) const 1893{ 1894 const dw_tag_t tag = Tag(); 1895 if (tag != DW_TAG_compile_unit) 1896 { 1897 dwarf_decl_ctx.AppendDeclContext(tag, GetName(dwarf2Data, cu)); 1898 const DWARFDebugInfoEntry *parent_decl_ctx_die = GetParentDeclContextDIE (dwarf2Data, cu); 1899 if (parent_decl_ctx_die && parent_decl_ctx_die != this) 1900 { 1901 if (parent_decl_ctx_die->Tag() != DW_TAG_compile_unit) 1902 parent_decl_ctx_die->GetDWARFDeclContext (dwarf2Data, cu, dwarf_decl_ctx); 1903 } 1904 } 1905} 1906 1907 1908bool 1909DWARFDebugInfoEntry::MatchesDWARFDeclContext (SymbolFileDWARF* dwarf2Data, 1910 DWARFCompileUnit* cu, 1911 const DWARFDeclContext &dwarf_decl_ctx) const 1912{ 1913 1914 DWARFDeclContext this_dwarf_decl_ctx; 1915 GetDWARFDeclContext (dwarf2Data, cu, this_dwarf_decl_ctx); 1916 return this_dwarf_decl_ctx == dwarf_decl_ctx; 1917} 1918 1919const DWARFDebugInfoEntry * 1920DWARFDebugInfoEntry::GetParentDeclContextDIE (SymbolFileDWARF* dwarf2Data, 1921 DWARFCompileUnit* cu) const 1922{ 1923 DWARFDebugInfoEntry::Attributes attributes; 1924 GetAttributes(dwarf2Data, cu, NULL, attributes); 1925 return GetParentDeclContextDIE (dwarf2Data, cu, attributes); 1926} 1927 1928const DWARFDebugInfoEntry * 1929DWARFDebugInfoEntry::GetParentDeclContextDIE (SymbolFileDWARF* dwarf2Data, 1930 DWARFCompileUnit* cu, 1931 const DWARFDebugInfoEntry::Attributes& attributes) const 1932{ 1933 const DWARFDebugInfoEntry * die = this; 1934 1935 while (die != NULL) 1936 { 1937 // If this is the original DIE that we are searching for a declaration 1938 // for, then don't look in the cache as we don't want our own decl 1939 // context to be our decl context... 1940 if (die != this) 1941 { 1942 switch (die->Tag()) 1943 { 1944 case DW_TAG_compile_unit: 1945 case DW_TAG_namespace: 1946 case DW_TAG_structure_type: 1947 case DW_TAG_union_type: 1948 case DW_TAG_class_type: 1949 return die; 1950 1951 default: 1952 break; 1953 } 1954 } 1955 1956 dw_offset_t die_offset; 1957 1958 die_offset = attributes.FormValueAsUnsigned(dwarf2Data, DW_AT_specification, DW_INVALID_OFFSET); 1959 if (die_offset != DW_INVALID_OFFSET) 1960 { 1961 const DWARFDebugInfoEntry *spec_die = cu->GetDIEPtr (die_offset); 1962 if (spec_die) 1963 { 1964 const DWARFDebugInfoEntry *spec_die_decl_ctx_die = spec_die->GetParentDeclContextDIE (dwarf2Data, cu); 1965 if (spec_die_decl_ctx_die) 1966 return spec_die_decl_ctx_die; 1967 } 1968 } 1969 1970 die_offset = attributes.FormValueAsUnsigned(dwarf2Data, DW_AT_abstract_origin, DW_INVALID_OFFSET); 1971 if (die_offset != DW_INVALID_OFFSET) 1972 { 1973 const DWARFDebugInfoEntry *abs_die = cu->GetDIEPtr (die_offset); 1974 if (abs_die) 1975 { 1976 const DWARFDebugInfoEntry *abs_die_decl_ctx_die = abs_die->GetParentDeclContextDIE (dwarf2Data, cu); 1977 if (abs_die_decl_ctx_die) 1978 return abs_die_decl_ctx_die; 1979 } 1980 } 1981 1982 die = die->GetParent(); 1983 } 1984 return NULL; 1985} 1986 1987 1988const char * 1989DWARFDebugInfoEntry::GetQualifiedName (SymbolFileDWARF* dwarf2Data, 1990 DWARFCompileUnit* cu, 1991 std::string &storage) const 1992{ 1993 DWARFDebugInfoEntry::Attributes attributes; 1994 GetAttributes(dwarf2Data, cu, NULL, attributes); 1995 return GetQualifiedName (dwarf2Data, cu, attributes, storage); 1996} 1997 1998const char* 1999DWARFDebugInfoEntry::GetQualifiedName (SymbolFileDWARF* dwarf2Data, 2000 DWARFCompileUnit* cu, 2001 const DWARFDebugInfoEntry::Attributes& attributes, 2002 std::string &storage) const 2003{ 2004 2005 const char *name = GetName (dwarf2Data, cu); 2006 2007 if (name) 2008 { 2009 const DWARFDebugInfoEntry *parent_decl_ctx_die = GetParentDeclContextDIE (dwarf2Data, cu); 2010 storage.clear(); 2011 // TODO: change this to get the correct decl context parent.... 2012 while (parent_decl_ctx_die) 2013 { 2014 const dw_tag_t parent_tag = parent_decl_ctx_die->Tag(); 2015 switch (parent_tag) 2016 { 2017 case DW_TAG_namespace: 2018 { 2019 const char *namespace_name = parent_decl_ctx_die->GetName (dwarf2Data, cu); 2020 if (namespace_name) 2021 { 2022 storage.insert (0, "::"); 2023 storage.insert (0, namespace_name); 2024 } 2025 else 2026 { 2027 storage.insert (0, "(anonymous namespace)::"); 2028 } 2029 parent_decl_ctx_die = parent_decl_ctx_die->GetParentDeclContextDIE(dwarf2Data, cu); 2030 } 2031 break; 2032 2033 case DW_TAG_class_type: 2034 case DW_TAG_structure_type: 2035 case DW_TAG_union_type: 2036 { 2037 const char *class_union_struct_name = parent_decl_ctx_die->GetName (dwarf2Data, cu); 2038 2039 if (class_union_struct_name) 2040 { 2041 storage.insert (0, "::"); 2042 storage.insert (0, class_union_struct_name); 2043 } 2044 parent_decl_ctx_die = parent_decl_ctx_die->GetParentDeclContextDIE(dwarf2Data, cu); 2045 } 2046 break; 2047 2048 default: 2049 parent_decl_ctx_die = NULL; 2050 break; 2051 } 2052 } 2053 2054 if (storage.empty()) 2055 storage.append ("::"); 2056 2057 storage.append (name); 2058 } 2059 if (storage.empty()) 2060 return NULL; 2061 return storage.c_str(); 2062} 2063 2064 2065//---------------------------------------------------------------------- 2066// LookupAddress 2067//---------------------------------------------------------------------- 2068bool 2069DWARFDebugInfoEntry::LookupAddress 2070( 2071 const dw_addr_t address, 2072 SymbolFileDWARF* dwarf2Data, 2073 const DWARFCompileUnit* cu, 2074 DWARFDebugInfoEntry** function_die, 2075 DWARFDebugInfoEntry** block_die 2076) 2077{ 2078 bool found_address = false; 2079 if (m_tag) 2080 { 2081 bool check_children = false; 2082 bool match_addr_range = false; 2083 // printf("0x%8.8x: %30s: address = 0x%8.8x - ", m_offset, DW_TAG_value_to_name(tag), address); 2084 switch (m_tag) 2085 { 2086 case DW_TAG_array_type : break; 2087 case DW_TAG_class_type : check_children = true; break; 2088 case DW_TAG_entry_point : break; 2089 case DW_TAG_enumeration_type : break; 2090 case DW_TAG_formal_parameter : break; 2091 case DW_TAG_imported_declaration : break; 2092 case DW_TAG_label : break; 2093 case DW_TAG_lexical_block : check_children = true; match_addr_range = true; break; 2094 case DW_TAG_member : break; 2095 case DW_TAG_pointer_type : break; 2096 case DW_TAG_reference_type : break; 2097 case DW_TAG_compile_unit : match_addr_range = true; break; 2098 case DW_TAG_string_type : break; 2099 case DW_TAG_structure_type : check_children = true; break; 2100 case DW_TAG_subroutine_type : break; 2101 case DW_TAG_typedef : break; 2102 case DW_TAG_union_type : break; 2103 case DW_TAG_unspecified_parameters : break; 2104 case DW_TAG_variant : break; 2105 case DW_TAG_common_block : check_children = true; break; 2106 case DW_TAG_common_inclusion : break; 2107 case DW_TAG_inheritance : break; 2108 case DW_TAG_inlined_subroutine : check_children = true; match_addr_range = true; break; 2109 case DW_TAG_module : match_addr_range = true; break; 2110 case DW_TAG_ptr_to_member_type : break; 2111 case DW_TAG_set_type : break; 2112 case DW_TAG_subrange_type : break; 2113 case DW_TAG_with_stmt : break; 2114 case DW_TAG_access_declaration : break; 2115 case DW_TAG_base_type : break; 2116 case DW_TAG_catch_block : match_addr_range = true; break; 2117 case DW_TAG_const_type : break; 2118 case DW_TAG_constant : break; 2119 case DW_TAG_enumerator : break; 2120 case DW_TAG_file_type : break; 2121 case DW_TAG_friend : break; 2122 case DW_TAG_namelist : break; 2123 case DW_TAG_namelist_item : break; 2124 case DW_TAG_packed_type : break; 2125 case DW_TAG_subprogram : match_addr_range = true; break; 2126 case DW_TAG_template_type_parameter : break; 2127 case DW_TAG_template_value_parameter : break; 2128 case DW_TAG_thrown_type : break; 2129 case DW_TAG_try_block : match_addr_range = true; break; 2130 case DW_TAG_variant_part : break; 2131 case DW_TAG_variable : break; 2132 case DW_TAG_volatile_type : break; 2133 case DW_TAG_dwarf_procedure : break; 2134 case DW_TAG_restrict_type : break; 2135 case DW_TAG_interface_type : break; 2136 case DW_TAG_namespace : check_children = true; break; 2137 case DW_TAG_imported_module : break; 2138 case DW_TAG_unspecified_type : break; 2139 case DW_TAG_partial_unit : break; 2140 case DW_TAG_imported_unit : break; 2141 case DW_TAG_shared_type : break; 2142 default: break; 2143 } 2144 2145 if (match_addr_range) 2146 { 2147 dw_addr_t lo_pc = GetAttributeValueAsUnsigned(dwarf2Data, cu, DW_AT_low_pc, LLDB_INVALID_ADDRESS); 2148 if (lo_pc != LLDB_INVALID_ADDRESS) 2149 { 2150 dw_addr_t hi_pc = GetAttributeHighPC(dwarf2Data, cu, lo_pc, LLDB_INVALID_ADDRESS); 2151 if (hi_pc != LLDB_INVALID_ADDRESS) 2152 { 2153 // 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); 2154 if ((lo_pc <= address) && (address < hi_pc)) 2155 { 2156 found_address = true; 2157 // puts("***MATCH***"); 2158 switch (m_tag) 2159 { 2160 case DW_TAG_compile_unit: // File 2161 check_children = ((function_die != NULL) || (block_die != NULL)); 2162 break; 2163 2164 case DW_TAG_subprogram: // Function 2165 if (function_die) 2166 *function_die = this; 2167 check_children = (block_die != NULL); 2168 break; 2169 2170 case DW_TAG_inlined_subroutine: // Inlined Function 2171 case DW_TAG_lexical_block: // Block { } in code 2172 if (block_die) 2173 { 2174 *block_die = this; 2175 check_children = true; 2176 } 2177 break; 2178 2179 default: 2180 check_children = true; 2181 break; 2182 } 2183 } 2184 } 2185 else 2186 { // compile units may not have a valid high/low pc when there 2187 // are address gaps in subroutines so we must always search 2188 // if there is no valid high and low PC 2189 check_children = (m_tag == DW_TAG_compile_unit) && ((function_die != NULL) || (block_die != NULL)); 2190 } 2191 } 2192 else 2193 { 2194 dw_offset_t debug_ranges_offset = GetAttributeValueAsUnsigned(dwarf2Data, cu, DW_AT_ranges, DW_INVALID_OFFSET); 2195 if (debug_ranges_offset != DW_INVALID_OFFSET) 2196 { 2197 DWARFDebugRanges::RangeList ranges; 2198 DWARFDebugRanges* debug_ranges = dwarf2Data->DebugRanges(); 2199 debug_ranges->FindRanges(debug_ranges_offset, ranges); 2200 // All DW_AT_ranges are relative to the base address of the 2201 // compile unit. We add the compile unit base address to make 2202 // sure all the addresses are properly fixed up. 2203 ranges.Slide (cu->GetBaseAddress()); 2204 if (ranges.FindEntryThatContains(address)) 2205 { 2206 found_address = true; 2207 // puts("***MATCH***"); 2208 switch (m_tag) 2209 { 2210 case DW_TAG_compile_unit: // File 2211 check_children = ((function_die != NULL) || (block_die != NULL)); 2212 break; 2213 2214 case DW_TAG_subprogram: // Function 2215 if (function_die) 2216 *function_die = this; 2217 check_children = (block_die != NULL); 2218 break; 2219 2220 case DW_TAG_inlined_subroutine: // Inlined Function 2221 case DW_TAG_lexical_block: // Block { } in code 2222 if (block_die) 2223 { 2224 *block_die = this; 2225 check_children = true; 2226 } 2227 break; 2228 2229 default: 2230 check_children = true; 2231 break; 2232 } 2233 } 2234 else 2235 { 2236 check_children = false; 2237 } 2238 } 2239 } 2240 } 2241 2242 2243 if (check_children) 2244 { 2245 // printf("checking children\n"); 2246 DWARFDebugInfoEntry* child = GetFirstChild(); 2247 while (child) 2248 { 2249 if (child->LookupAddress(address, dwarf2Data, cu, function_die, block_die)) 2250 return true; 2251 child = child->GetSibling(); 2252 } 2253 } 2254 } 2255 return found_address; 2256} 2257 2258const DWARFAbbreviationDeclaration* 2259DWARFDebugInfoEntry::GetAbbreviationDeclarationPtr (SymbolFileDWARF* dwarf2Data, 2260 const DWARFCompileUnit *cu, 2261 lldb::offset_t &offset) const 2262{ 2263 if (dwarf2Data) 2264 { 2265 offset = GetOffset(); 2266 2267 const DWARFAbbreviationDeclaration* abbrev_decl = cu->GetAbbreviations()->GetAbbreviationDeclaration (m_abbr_idx); 2268 if (abbrev_decl) 2269 { 2270 // Make sure the abbreviation code still matches. If it doesn't and 2271 // the DWARF data was mmap'ed, the backing file might have been modified 2272 // which is bad news. 2273 const uint64_t abbrev_code = dwarf2Data->get_debug_info_data().GetULEB128 (&offset); 2274 2275 if (abbrev_decl->Code() == abbrev_code) 2276 return abbrev_decl; 2277 2278 dwarf2Data->GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("0x%8.8x: the DWARF debug information has been modified (abbrev code was %u, and is now %u)", 2279 GetOffset(), 2280 (uint32_t)abbrev_decl->Code(), 2281 (uint32_t)abbrev_code); 2282 } 2283 } 2284 offset = DW_INVALID_OFFSET; 2285 return NULL; 2286} 2287 2288 2289bool 2290DWARFDebugInfoEntry::OffsetLessThan (const DWARFDebugInfoEntry& a, const DWARFDebugInfoEntry& b) 2291{ 2292 return a.GetOffset() < b.GetOffset(); 2293} 2294 2295void 2296DWARFDebugInfoEntry::DumpDIECollection (Stream &strm, DWARFDebugInfoEntry::collection &die_collection) 2297{ 2298 DWARFDebugInfoEntry::const_iterator pos; 2299 DWARFDebugInfoEntry::const_iterator end = die_collection.end(); 2300 strm.PutCString("\noffset parent sibling child\n"); 2301 strm.PutCString("-------- -------- -------- --------\n"); 2302 for (pos = die_collection.begin(); pos != end; ++pos) 2303 { 2304 const DWARFDebugInfoEntry& die_ref = *pos; 2305 const DWARFDebugInfoEntry* p = die_ref.GetParent(); 2306 const DWARFDebugInfoEntry* s = die_ref.GetSibling(); 2307 const DWARFDebugInfoEntry* c = die_ref.GetFirstChild(); 2308 strm.Printf("%.8x: %.8x %.8x %.8x 0x%4.4x %s%s\n", 2309 die_ref.GetOffset(), 2310 p ? p->GetOffset() : 0, 2311 s ? s->GetOffset() : 0, 2312 c ? c->GetOffset() : 0, 2313 die_ref.Tag(), 2314 DW_TAG_value_to_name(die_ref.Tag()), 2315 die_ref.HasChildren() ? " *" : ""); 2316 } 2317} 2318 2319 2320