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 33 using namespace lldb_private; 34 using namespace std; 35 extern int g_verbose; 36 37 38 39 DWARFDebugInfoEntry::Attributes::Attributes() : 40 m_infos() 41 { 42 } 43 44 DWARFDebugInfoEntry::Attributes::~Attributes() 45 { 46 } 47 48 49 uint32_t 50 DWARFDebugInfoEntry::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 63 void 64 DWARFDebugInfoEntry::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 70 bool 71 DWARFDebugInfoEntry::Attributes::ContainsAttribute(dw_attr_t attr) const 72 { 73 return FindAttributeIndex(attr) != UINT32_MAX; 74 } 75 76 bool 77 DWARFDebugInfoEntry::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 88 bool 89 DWARFDebugInfoEntry::Attributes::ExtractFormValueAtIndex (SymbolFileDWARF* dwarf2Data, uint32_t i, DWARFFormValue &form_value) const 90 { 91 form_value.SetForm(FormAtIndex(i)); 92 dw_offset_t offset = DIEOffsetAtIndex(i); 93 return form_value.ExtractValue(dwarf2Data->get_debug_info_data(), &offset, CompileUnitAtIndex(i)); 94 } 95 96 uint64_t 97 DWARFDebugInfoEntry::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 } 104 105 uint64_t 106 DWARFDebugInfoEntry::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 } 113 114 115 116 bool 117 DWARFDebugInfoEntry::FastExtract 118 ( 119 const DataExtractor& debug_info_data, 120 const DWARFCompileUnit* cu, 121 const uint8_t *fixed_form_sizes, 122 uint32_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 uint32_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 register uint32_t i; 155 register 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 register 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 case DW_FORM_ref_addr : 188 form_size = cu->GetAddressByteSize(); 189 break; 190 191 // 0 sized form 192 case DW_FORM_flag_present: 193 form_size = 0; 194 break; 195 196 // 1 byte values 197 case DW_FORM_data1 : 198 case DW_FORM_flag : 199 case DW_FORM_ref1 : 200 form_size = 1; 201 break; 202 203 // 2 byte values 204 case DW_FORM_data2 : 205 case DW_FORM_ref2 : 206 form_size = 2; 207 break; 208 209 // 4 byte values 210 case DW_FORM_strp : 211 case DW_FORM_data4 : 212 case DW_FORM_ref4 : 213 form_size = 4; 214 break; 215 216 // 8 byte values 217 case DW_FORM_data8 : 218 case DW_FORM_ref8 : 219 case DW_FORM_ref_sig8 : 220 form_size = 8; 221 break; 222 223 // signed or unsigned LEB 128 values 224 case DW_FORM_sdata : 225 case DW_FORM_udata : 226 case DW_FORM_ref_udata : 227 debug_info_data.Skip_LEB128 (&offset); 228 break; 229 230 case DW_FORM_indirect : 231 form_is_indirect = true; 232 form = debug_info_data.GetULEB128 (&offset); 233 break; 234 235 case DW_FORM_sec_offset : 236 if (cu->GetAddressByteSize () == 4) 237 debug_info_data.GetU32 (offset_ptr); 238 else 239 debug_info_data.GetU64 (offset_ptr); 240 break; 241 242 default: 243 *offset_ptr = m_offset; 244 return false; 245 } 246 offset += form_size; 247 248 } while (form_is_indirect); 249 } 250 } 251 *offset_ptr = offset; 252 return true; 253 } 254 else 255 { 256 m_tag = 0; 257 m_has_children = false; 258 return true; // NULL debug tag entry 259 } 260 261 return false; 262 } 263 264 //---------------------------------------------------------------------- 265 // Extract 266 // 267 // Extract a debug info entry for a given compile unit from the 268 // .debug_info and .debug_abbrev data within the SymbolFileDWARF class 269 // starting at the given offset 270 //---------------------------------------------------------------------- 271 bool 272 DWARFDebugInfoEntry::Extract 273 ( 274 SymbolFileDWARF* dwarf2Data, 275 const DWARFCompileUnit* cu, 276 uint32_t* offset_ptr 277 ) 278 { 279 const DataExtractor& debug_info_data = dwarf2Data->get_debug_info_data(); 280 // const DataExtractor& debug_str_data = dwarf2Data->get_debug_str_data(); 281 const uint32_t cu_end_offset = cu->GetNextCompileUnitOffset(); 282 const uint8_t cu_addr_size = cu->GetAddressByteSize(); 283 uint32_t offset = *offset_ptr; 284 // if (offset >= cu_end_offset) 285 // 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); 286 if ((offset < cu_end_offset) && debug_info_data.ValidOffset(offset)) 287 { 288 m_offset = offset; 289 290 const uint64_t abbr_idx = debug_info_data.GetULEB128(&offset); 291 assert (abbr_idx < (1 << DIE_ABBR_IDX_BITSIZE)); 292 m_abbr_idx = abbr_idx; 293 if (abbr_idx) 294 { 295 const DWARFAbbreviationDeclaration *abbrevDecl = cu->GetAbbreviations()->GetAbbreviationDeclaration(abbr_idx); 296 297 if (abbrevDecl) 298 { 299 m_tag = abbrevDecl->Tag(); 300 m_has_children = abbrevDecl->HasChildren(); 301 302 bool isCompileUnitTag = m_tag == DW_TAG_compile_unit; 303 if (cu && isCompileUnitTag) 304 ((DWARFCompileUnit*)cu)->SetBaseAddress(0); 305 306 // Skip all data in the .debug_info for the attributes 307 const uint32_t numAttributes = abbrevDecl->NumAttributes(); 308 uint32_t i; 309 dw_attr_t attr; 310 dw_form_t form; 311 for (i=0; i<numAttributes; ++i) 312 { 313 abbrevDecl->GetAttrAndFormByIndexUnchecked(i, attr, form); 314 315 if (isCompileUnitTag && ((attr == DW_AT_entry_pc) || (attr == DW_AT_low_pc))) 316 { 317 DWARFFormValue form_value(form); 318 if (form_value.ExtractValue(debug_info_data, &offset, cu)) 319 { 320 if (attr == DW_AT_low_pc || attr == DW_AT_entry_pc) 321 ((DWARFCompileUnit*)cu)->SetBaseAddress(form_value.Unsigned()); 322 } 323 } 324 else 325 { 326 bool form_is_indirect = false; 327 do 328 { 329 form_is_indirect = false; 330 register uint32_t form_size = 0; 331 switch (form) 332 { 333 // Blocks if inlined data that have a length field and the data bytes 334 // inlined in the .debug_info 335 case DW_FORM_exprloc : 336 case DW_FORM_block : form_size = debug_info_data.GetULEB128(&offset); break; 337 case DW_FORM_block1 : form_size = debug_info_data.GetU8(&offset); break; 338 case DW_FORM_block2 : form_size = debug_info_data.GetU16(&offset); break; 339 case DW_FORM_block4 : form_size = debug_info_data.GetU32(&offset); break; 340 341 // Inlined NULL terminated C-strings 342 case DW_FORM_string : debug_info_data.GetCStr(&offset); break; 343 344 // Compile unit address sized values 345 case DW_FORM_addr : 346 case DW_FORM_ref_addr : 347 form_size = cu_addr_size; 348 break; 349 350 // 0 sized form 351 case DW_FORM_flag_present: 352 form_size = 0; 353 break; 354 355 // 1 byte values 356 case DW_FORM_data1 : 357 case DW_FORM_flag : 358 case DW_FORM_ref1 : 359 form_size = 1; 360 break; 361 362 // 2 byte values 363 case DW_FORM_data2 : 364 case DW_FORM_ref2 : 365 form_size = 2; 366 break; 367 368 // 4 byte values 369 case DW_FORM_strp : 370 form_size = 4; 371 break; 372 373 case DW_FORM_data4 : 374 case DW_FORM_ref4 : 375 form_size = 4; 376 break; 377 378 // 8 byte values 379 case DW_FORM_data8 : 380 case DW_FORM_ref8 : 381 case DW_FORM_ref_sig8 : 382 form_size = 8; 383 break; 384 385 // signed or unsigned LEB 128 values 386 case DW_FORM_sdata : 387 case DW_FORM_udata : 388 case DW_FORM_ref_udata : 389 debug_info_data.Skip_LEB128(&offset); 390 break; 391 392 case DW_FORM_indirect : 393 form = debug_info_data.GetULEB128(&offset); 394 form_is_indirect = true; 395 break; 396 397 case DW_FORM_sec_offset : 398 if (cu->GetAddressByteSize () == 4) 399 debug_info_data.GetU32 (offset_ptr); 400 else 401 debug_info_data.GetU64 (offset_ptr); 402 break; 403 404 default: 405 *offset_ptr = offset; 406 return false; 407 } 408 409 offset += form_size; 410 } while (form_is_indirect); 411 } 412 } 413 *offset_ptr = offset; 414 return true; 415 } 416 } 417 else 418 { 419 m_tag = 0; 420 m_has_children = false; 421 *offset_ptr = offset; 422 return true; // NULL debug tag entry 423 } 424 } 425 426 return false; 427 } 428 429 //---------------------------------------------------------------------- 430 // DumpAncestry 431 // 432 // Dumps all of a debug information entries parents up until oldest and 433 // all of it's attributes to the specified stream. 434 //---------------------------------------------------------------------- 435 void 436 DWARFDebugInfoEntry::DumpAncestry 437 ( 438 SymbolFileDWARF* dwarf2Data, 439 const DWARFCompileUnit* cu, 440 const DWARFDebugInfoEntry* oldest, 441 Stream &s, 442 uint32_t recurse_depth 443 ) const 444 { 445 const DWARFDebugInfoEntry* parent = GetParent(); 446 if (parent && parent != oldest) 447 parent->DumpAncestry(dwarf2Data, cu, oldest, s, 0); 448 Dump(dwarf2Data, cu, s, recurse_depth); 449 } 450 451 //---------------------------------------------------------------------- 452 // Compare two DIE by comparing all their attributes values, and 453 // following all DW_FORM_ref attributes and comparing their contents as 454 // well (except for DW_AT_sibling attributes. 455 // 456 // DWARFDebugInfoEntry::CompareState compare_state; 457 // int result = DWARFDebugInfoEntry::Compare(this, 0x00017ccb, 0x0001eb2b, compare_state, false, true); 458 //---------------------------------------------------------------------- 459 //int 460 //DWARFDebugInfoEntry::Compare 461 //( 462 // SymbolFileDWARF* dwarf2Data, 463 // dw_offset_t a_die_offset, 464 // dw_offset_t b_die_offset, 465 // CompareState &compare_state, 466 // bool compare_siblings, 467 // bool compare_children 468 //) 469 //{ 470 // if (a_die_offset == b_die_offset) 471 // return 0; 472 // 473 // DWARFCompileUnitSP a_cu_sp; 474 // DWARFCompileUnitSP b_cu_sp; 475 // const DWARFDebugInfoEntry* a_die = dwarf2Data->DebugInfo()->GetDIEPtr(a_die_offset, &a_cu_sp); 476 // const DWARFDebugInfoEntry* b_die = dwarf2Data->DebugInfo()->GetDIEPtr(b_die_offset, &b_cu_sp); 477 // 478 // return Compare(dwarf2Data, a_cu_sp.get(), a_die, b_cu_sp.get(), b_die, compare_state, compare_siblings, compare_children); 479 //} 480 // 481 //int 482 //DWARFDebugInfoEntry::Compare 483 //( 484 // SymbolFileDWARF* dwarf2Data, 485 // DWARFCompileUnit* a_cu, const DWARFDebugInfoEntry* a_die, 486 // DWARFCompileUnit* b_cu, const DWARFDebugInfoEntry* b_die, 487 // CompareState &compare_state, 488 // bool compare_siblings, 489 // bool compare_children 490 //) 491 //{ 492 // if (a_die == b_die) 493 // return 0; 494 // 495 // if (!compare_state.AddTypePair(a_die->GetOffset(), b_die->GetOffset())) 496 // { 497 // // We are already comparing both of these types, so let 498 // // compares complete for the real result 499 // return 0; 500 // } 501 // 502 // //printf("DWARFDebugInfoEntry::Compare(0x%8.8x, 0x%8.8x)\n", a_die->GetOffset(), b_die->GetOffset()); 503 // 504 // // Do we have two valid DIEs? 505 // if (a_die && b_die) 506 // { 507 // // Both DIE are valid 508 // int result = 0; 509 // 510 // const dw_tag_t a_tag = a_die->Tag(); 511 // const dw_tag_t b_tag = b_die->Tag(); 512 // if (a_tag == 0 && b_tag == 0) 513 // return 0; 514 // 515 // //printf(" comparing tags: %s and %s\n", DW_TAG_value_to_name(a_tag), DW_TAG_value_to_name(b_tag)); 516 // 517 // if (a_tag < b_tag) 518 // return -1; 519 // else if (a_tag > b_tag) 520 // return 1; 521 // 522 // DWARFDebugInfoEntry::Attributes a_attrs; 523 // DWARFDebugInfoEntry::Attributes b_attrs; 524 // size_t a_attr_count = a_die->GetAttributes(dwarf2Data, a_cu, a_attrs); 525 // size_t b_attr_count = b_die->GetAttributes(dwarf2Data, b_cu, b_attrs); 526 // if (a_attr_count != b_attr_count) 527 // { 528 // a_attrs.RemoveAttribute(DW_AT_sibling); 529 // b_attrs.RemoveAttribute(DW_AT_sibling); 530 // } 531 // 532 // a_attr_count = a_attrs.Size(); 533 // b_attr_count = b_attrs.Size(); 534 // 535 // DWARFFormValue a_form_value; 536 // DWARFFormValue b_form_value; 537 // 538 // if (a_attr_count != b_attr_count) 539 // { 540 // uint32_t is_decl_index = a_attrs.FindAttributeIndex(DW_AT_declaration); 541 // uint32_t a_name_index = UINT32_MAX; 542 // uint32_t b_name_index = UINT32_MAX; 543 // if (is_decl_index != UINT32_MAX) 544 // { 545 // if (a_attr_count == 2) 546 // { 547 // a_name_index = a_attrs.FindAttributeIndex(DW_AT_name); 548 // b_name_index = b_attrs.FindAttributeIndex(DW_AT_name); 549 // } 550 // } 551 // else 552 // { 553 // is_decl_index = b_attrs.FindAttributeIndex(DW_AT_declaration); 554 // if (is_decl_index != UINT32_MAX && a_attr_count == 2) 555 // { 556 // a_name_index = a_attrs.FindAttributeIndex(DW_AT_name); 557 // b_name_index = b_attrs.FindAttributeIndex(DW_AT_name); 558 // } 559 // } 560 // if (a_name_index != UINT32_MAX && b_name_index != UINT32_MAX) 561 // { 562 // if (a_attrs.ExtractFormValueAtIndex(dwarf2Data, a_name_index, a_form_value) && 563 // b_attrs.ExtractFormValueAtIndex(dwarf2Data, b_name_index, b_form_value)) 564 // { 565 // result = DWARFFormValue::Compare (a_form_value, b_form_value, a_cu, b_cu, &dwarf2Data->get_debug_str_data()); 566 // if (result == 0) 567 // { 568 // a_attr_count = b_attr_count = 0; 569 // compare_children = false; 570 // } 571 // } 572 // } 573 // } 574 // 575 // if (a_attr_count < b_attr_count) 576 // return -1; 577 // if (a_attr_count > b_attr_count) 578 // return 1; 579 // 580 // 581 // // The number of attributes are the same... 582 // if (a_attr_count > 0) 583 // { 584 // const DataExtractor* debug_str_data_ptr = &dwarf2Data->get_debug_str_data(); 585 // 586 // uint32_t i; 587 // for (i=0; i<a_attr_count; ++i) 588 // { 589 // const dw_attr_t a_attr = a_attrs.AttributeAtIndex(i); 590 // const dw_attr_t b_attr = b_attrs.AttributeAtIndex(i); 591 // //printf(" comparing attributes\n\t\t0x%8.8x: %s %s\t\t0x%8.8x: %s %s\n", 592 // // a_attrs.DIEOffsetAtIndex(i), DW_FORM_value_to_name(a_attrs.FormAtIndex(i)), DW_AT_value_to_name(a_attr), 593 // // b_attrs.DIEOffsetAtIndex(i), DW_FORM_value_to_name(b_attrs.FormAtIndex(i)), DW_AT_value_to_name(b_attr)); 594 // 595 // if (a_attr < b_attr) 596 // return -1; 597 // else if (a_attr > b_attr) 598 // return 1; 599 // 600 // switch (a_attr) 601 // { 602 // // Since we call a form of GetAttributes which inlines the 603 // // attributes from DW_AT_abstract_origin and DW_AT_specification 604 // // we don't care if their values mismatch... 605 // case DW_AT_abstract_origin: 606 // case DW_AT_specification: 607 // case DW_AT_sibling: 608 // case DW_AT_containing_type: 609 // //printf(" action = IGNORE\n"); 610 // result = 0; 611 // break; // ignore 612 // 613 // default: 614 // if (a_attrs.ExtractFormValueAtIndex(dwarf2Data, i, a_form_value) && 615 // b_attrs.ExtractFormValueAtIndex(dwarf2Data, i, b_form_value)) 616 // result = DWARFFormValue::Compare (a_form_value, b_form_value, a_cu, b_cu, debug_str_data_ptr); 617 // break; 618 // } 619 // 620 // //printf("\t result = %i\n", result); 621 // 622 // if (result != 0) 623 // { 624 // // Attributes weren't equal, lets see if we care? 625 // switch (a_attr) 626 // { 627 // case DW_AT_decl_file: 628 // // TODO: add the ability to compare files in two different compile units 629 // if (a_cu == b_cu) 630 // { 631 // //printf(" action = RETURN RESULT\n"); 632 // return result; // Only return the compare results when the compile units are the same and the decl_file attributes can be compared 633 // } 634 // else 635 // { 636 // result = 0; 637 // //printf(" action = IGNORE\n"); 638 // } 639 // break; 640 // 641 // default: 642 // switch (a_attrs.FormAtIndex(i)) 643 // { 644 // case DW_FORM_ref1: 645 // case DW_FORM_ref2: 646 // case DW_FORM_ref4: 647 // case DW_FORM_ref8: 648 // case DW_FORM_ref_udata: 649 // case DW_FORM_ref_addr: 650 // //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)); 651 // // These attribute values refer to other DIEs, so lets compare those instead of their DIE offsets... 652 // result = Compare(dwarf2Data, a_form_value.Reference(a_cu), b_form_value.Reference(b_cu), compare_state, false, true); 653 // if (result != 0) 654 // return result; 655 // break; 656 // 657 // default: 658 // // We do care that they were different, return this result... 659 // //printf(" action = RETURN RESULT\n"); 660 // return result; 661 // } 662 // } 663 // } 664 // } 665 // } 666 // //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)); 667 // 668 // if (compare_children) 669 // { 670 // bool a_has_children = a_die->HasChildren(); 671 // bool b_has_children = b_die->HasChildren(); 672 // if (a_has_children == b_has_children) 673 // { 674 // // Both either have kids or don't 675 // if (a_has_children) 676 // result = Compare( dwarf2Data, 677 // a_cu, a_die->GetFirstChild(), 678 // b_cu, b_die->GetFirstChild(), 679 // compare_state, true, compare_children); 680 // else 681 // result = 0; 682 // } 683 // else if (!a_has_children) 684 // result = -1; // A doesn't have kids, but B does 685 // else 686 // result = 1; // A has kids, but B doesn't 687 // } 688 // 689 // if (compare_siblings) 690 // { 691 // result = Compare( dwarf2Data, 692 // a_cu, a_die->GetSibling(), 693 // b_cu, b_die->GetSibling(), 694 // compare_state, true, compare_children); 695 // } 696 // 697 // return result; 698 // } 699 // 700 // if (a_die == NULL) 701 // return -1; // a_die is NULL, yet b_die is non-NULL 702 // else 703 // return 1; // a_die is non-NULL, yet b_die is NULL 704 // 705 //} 706 // 707 // 708 //int 709 //DWARFDebugInfoEntry::Compare 710 //( 711 // SymbolFileDWARF* dwarf2Data, 712 // const DWARFCompileUnit* cu_a, 713 // const DWARFDebugInfoEntry* die_a, 714 // const DWARFCompileUnit* cu_a, 715 // const DWARFDebugInfoEntry* die_b, 716 // CompareState &compare_state 717 //) 718 //{ 719 //} 720 721 //---------------------------------------------------------------------- 722 // GetDIENamesAndRanges 723 // 724 // Gets the valid address ranges for a given DIE by looking for a 725 // DW_AT_low_pc/DW_AT_high_pc pair, DW_AT_entry_pc, or DW_AT_ranges 726 // attributes. 727 //---------------------------------------------------------------------- 728 bool 729 DWARFDebugInfoEntry::GetDIENamesAndRanges 730 ( 731 SymbolFileDWARF* dwarf2Data, 732 const DWARFCompileUnit* cu, 733 const char * &name, 734 const char * &mangled, 735 DWARFDebugRanges::RangeList& ranges, 736 int& decl_file, 737 int& decl_line, 738 int& decl_column, 739 int& call_file, 740 int& call_line, 741 int& call_column, 742 DWARFExpression *frame_base 743 ) const 744 { 745 if (dwarf2Data == NULL) 746 return false; 747 748 dw_addr_t lo_pc = DW_INVALID_ADDRESS; 749 dw_addr_t hi_pc = DW_INVALID_ADDRESS; 750 std::vector<dw_offset_t> die_offsets; 751 bool set_frame_base_loclist_addr = false; 752 753 dw_offset_t offset; 754 const DWARFAbbreviationDeclaration* abbrevDecl = GetAbbreviationDeclarationPtr(dwarf2Data, cu, offset); 755 756 if (abbrevDecl) 757 { 758 const DataExtractor& debug_info_data = dwarf2Data->get_debug_info_data(); 759 760 if (!debug_info_data.ValidOffset(offset)) 761 return false; 762 763 const uint32_t numAttributes = abbrevDecl->NumAttributes(); 764 uint32_t i; 765 dw_attr_t attr; 766 dw_form_t form; 767 for (i=0; i<numAttributes; ++i) 768 { 769 abbrevDecl->GetAttrAndFormByIndexUnchecked(i, attr, form); 770 DWARFFormValue form_value(form); 771 if (form_value.ExtractValue(debug_info_data, &offset, cu)) 772 { 773 switch (attr) 774 { 775 case DW_AT_low_pc: 776 case DW_AT_entry_pc: 777 lo_pc = form_value.Unsigned(); 778 break; 779 780 case DW_AT_high_pc: 781 hi_pc = form_value.Unsigned(); 782 break; 783 784 case DW_AT_ranges: 785 { 786 const DWARFDebugRanges* debug_ranges = dwarf2Data->DebugRanges(); 787 debug_ranges->FindRanges(form_value.Unsigned(), ranges); 788 // All DW_AT_ranges are relative to the base address of the 789 // compile unit. We add the compile unit base address to make 790 // sure all the addresses are properly fixed up. 791 ranges.Slide(cu->GetBaseAddress()); 792 } 793 break; 794 795 case DW_AT_name: 796 if (name == NULL) 797 name = form_value.AsCString(&dwarf2Data->get_debug_str_data()); 798 break; 799 800 case DW_AT_MIPS_linkage_name: 801 if (mangled == NULL) 802 mangled = form_value.AsCString(&dwarf2Data->get_debug_str_data()); 803 break; 804 805 case DW_AT_abstract_origin: 806 die_offsets.push_back(form_value.Reference(cu)); 807 break; 808 809 case DW_AT_specification: 810 die_offsets.push_back(form_value.Reference(cu)); 811 break; 812 813 case DW_AT_decl_file: 814 if (decl_file == 0) 815 decl_file = form_value.Unsigned(); 816 break; 817 818 case DW_AT_decl_line: 819 if (decl_line == 0) 820 decl_line = form_value.Unsigned(); 821 break; 822 823 case DW_AT_decl_column: 824 if (decl_column == 0) 825 decl_column = form_value.Unsigned(); 826 break; 827 828 case DW_AT_call_file: 829 if (call_file == 0) 830 call_file = form_value.Unsigned(); 831 break; 832 833 case DW_AT_call_line: 834 if (call_line == 0) 835 call_line = form_value.Unsigned(); 836 break; 837 838 case DW_AT_call_column: 839 if (call_column == 0) 840 call_column = form_value.Unsigned(); 841 break; 842 843 case DW_AT_frame_base: 844 if (frame_base) 845 { 846 if (form_value.BlockData()) 847 { 848 uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart(); 849 uint32_t block_length = form_value.Unsigned(); 850 frame_base->SetOpcodeData(debug_info_data, block_offset, block_length); 851 } 852 else 853 { 854 const DataExtractor &debug_loc_data = dwarf2Data->get_debug_loc_data(); 855 const dw_offset_t debug_loc_offset = form_value.Unsigned(); 856 857 size_t loc_list_length = DWARFLocationList::Size(debug_loc_data, debug_loc_offset); 858 if (loc_list_length > 0) 859 { 860 frame_base->SetOpcodeData(debug_loc_data, debug_loc_offset, loc_list_length); 861 if (lo_pc != DW_INVALID_ADDRESS) 862 { 863 assert (lo_pc >= cu->GetBaseAddress()); 864 frame_base->SetLocationListSlide(lo_pc - cu->GetBaseAddress()); 865 } 866 else 867 { 868 set_frame_base_loclist_addr = true; 869 } 870 } 871 } 872 } 873 break; 874 875 default: 876 break; 877 } 878 } 879 } 880 } 881 882 if (ranges.IsEmpty()) 883 { 884 if (lo_pc != DW_INVALID_ADDRESS) 885 { 886 if (hi_pc != DW_INVALID_ADDRESS && hi_pc > lo_pc) 887 ranges.Append(DWARFDebugRanges::Range (lo_pc, hi_pc - lo_pc)); 888 else 889 ranges.Append(DWARFDebugRanges::Range (lo_pc, 0)); 890 } 891 } 892 893 if (set_frame_base_loclist_addr) 894 { 895 dw_addr_t lowest_range_pc = ranges.GetMinRangeBase(0); 896 assert (lowest_range_pc >= cu->GetBaseAddress()); 897 frame_base->SetLocationListSlide (lowest_range_pc - cu->GetBaseAddress()); 898 } 899 900 if (ranges.IsEmpty() || name == NULL || mangled == NULL) 901 { 902 std::vector<dw_offset_t>::const_iterator pos; 903 std::vector<dw_offset_t>::const_iterator end = die_offsets.end(); 904 for (pos = die_offsets.begin(); pos != end; ++pos) 905 { 906 DWARFCompileUnitSP cu_sp_ptr; 907 const DWARFDebugInfoEntry* die = NULL; 908 dw_offset_t die_offset = *pos; 909 if (die_offset != DW_INVALID_OFFSET) 910 { 911 die = dwarf2Data->DebugInfo()->GetDIEPtr(die_offset, &cu_sp_ptr); 912 if (die) 913 die->GetDIENamesAndRanges(dwarf2Data, cu_sp_ptr.get(), name, mangled, ranges, decl_file, decl_line, decl_column, call_file, call_line, call_column); 914 } 915 } 916 } 917 return !ranges.IsEmpty(); 918 } 919 920 //---------------------------------------------------------------------- 921 // Dump 922 // 923 // Dumps a debug information entry and all of it's attributes to the 924 // specified stream. 925 //---------------------------------------------------------------------- 926 void 927 DWARFDebugInfoEntry::Dump 928 ( 929 SymbolFileDWARF* dwarf2Data, 930 const DWARFCompileUnit* cu, 931 Stream &s, 932 uint32_t recurse_depth 933 ) const 934 { 935 const DataExtractor& debug_info_data = dwarf2Data->get_debug_info_data(); 936 uint32_t offset = m_offset; 937 938 if (debug_info_data.ValidOffset(offset)) 939 { 940 dw_uleb128_t abbrCode = debug_info_data.GetULEB128(&offset); 941 942 s.Printf("\n0x%8.8x: ", m_offset); 943 s.Indent(); 944 if (abbrCode != m_abbr_idx) 945 { 946 s.Printf( "error: DWARF has been modified\n"); 947 } 948 else if (abbrCode) 949 { 950 const DWARFAbbreviationDeclaration* abbrevDecl = cu->GetAbbreviations()->GetAbbreviationDeclaration (abbrCode); 951 952 if (abbrevDecl) 953 { 954 s.PutCString(DW_TAG_value_to_name(abbrevDecl->Tag())); 955 s.Printf( " [%u] %c\n", abbrCode, abbrevDecl->HasChildren() ? '*':' '); 956 957 // Dump all data in the .debug_info for the attributes 958 const uint32_t numAttributes = abbrevDecl->NumAttributes(); 959 uint32_t i; 960 dw_attr_t attr; 961 dw_form_t form; 962 for (i=0; i<numAttributes; ++i) 963 { 964 abbrevDecl->GetAttrAndFormByIndexUnchecked(i, attr, form); 965 966 DumpAttribute(dwarf2Data, cu, debug_info_data, &offset, s, attr, form); 967 } 968 969 const DWARFDebugInfoEntry* child = GetFirstChild(); 970 if (recurse_depth > 0 && child) 971 { 972 s.IndentMore(); 973 974 while (child) 975 { 976 child->Dump(dwarf2Data, cu, s, recurse_depth-1); 977 child = child->GetSibling(); 978 } 979 s.IndentLess(); 980 } 981 } 982 else 983 s.Printf( "Abbreviation code note found in 'debug_abbrev' class for code: %u\n", abbrCode); 984 } 985 else 986 { 987 s.Printf( "NULL\n"); 988 } 989 } 990 } 991 992 void 993 DWARFDebugInfoEntry::DumpLocation 994 ( 995 SymbolFileDWARF* dwarf2Data, 996 DWARFCompileUnit* cu, 997 Stream &s 998 ) const 999 { 1000 const DWARFDebugInfoEntry *cu_die = cu->GetCompileUnitDIEOnly(); 1001 const char *cu_name = NULL; 1002 if (cu_die != NULL) 1003 cu_name = cu_die->GetName (dwarf2Data, cu); 1004 const char *obj_file_name = NULL; 1005 ObjectFile *obj_file = dwarf2Data->GetObjectFile(); 1006 if (obj_file) 1007 obj_file_name = obj_file->GetFileSpec().GetFilename().AsCString(); 1008 const char *die_name = GetName (dwarf2Data, cu); 1009 s.Printf ("0x%8.8x/0x%8.8x: %-30s (from %s in %s)", 1010 cu->GetOffset(), 1011 GetOffset(), 1012 die_name ? die_name : "", 1013 cu_name ? cu_name : "<NULL>", 1014 obj_file_name ? obj_file_name : "<NULL>"); 1015 } 1016 1017 //---------------------------------------------------------------------- 1018 // DumpAttribute 1019 // 1020 // Dumps a debug information entry attribute along with it's form. Any 1021 // special display of attributes is done (disassemble location lists, 1022 // show enumeration values for attributes, etc). 1023 //---------------------------------------------------------------------- 1024 void 1025 DWARFDebugInfoEntry::DumpAttribute 1026 ( 1027 SymbolFileDWARF* dwarf2Data, 1028 const DWARFCompileUnit* cu, 1029 const DataExtractor& debug_info_data, 1030 uint32_t* offset_ptr, 1031 Stream &s, 1032 dw_attr_t attr, 1033 dw_form_t form 1034 ) 1035 { 1036 bool verbose = s.GetVerbose(); 1037 bool show_form = s.GetFlags().Test(DWARFDebugInfo::eDumpFlag_ShowForm); 1038 1039 const DataExtractor* debug_str_data = dwarf2Data ? &dwarf2Data->get_debug_str_data() : NULL; 1040 if (verbose) 1041 s.Offset (*offset_ptr); 1042 else 1043 s.Printf (" "); 1044 s.Indent(DW_AT_value_to_name(attr)); 1045 1046 if (show_form) 1047 { 1048 s.Printf( "[%s", DW_FORM_value_to_name(form)); 1049 } 1050 1051 DWARFFormValue form_value(form); 1052 1053 if (!form_value.ExtractValue(debug_info_data, offset_ptr, cu)) 1054 return; 1055 1056 if (show_form) 1057 { 1058 if (form == DW_FORM_indirect) 1059 { 1060 s.Printf( " [%s]", DW_FORM_value_to_name(form_value.Form())); 1061 } 1062 1063 s.PutCString("] "); 1064 } 1065 1066 s.PutCString("( "); 1067 1068 // Always dump form value if verbose is enabled 1069 if (verbose) 1070 { 1071 form_value.Dump(s, debug_str_data, cu); 1072 } 1073 1074 1075 // Check to see if we have any special attribute formatters 1076 switch (attr) 1077 { 1078 case DW_AT_stmt_list: 1079 if ( verbose ) s.PutCString(" ( "); 1080 s.Printf( "0x%8.8llx", form_value.Unsigned()); 1081 if ( verbose ) s.PutCString(" )"); 1082 break; 1083 1084 case DW_AT_language: 1085 if ( verbose ) s.PutCString(" ( "); 1086 s.PutCString(DW_LANG_value_to_name(form_value.Unsigned())); 1087 if ( verbose ) s.PutCString(" )"); 1088 break; 1089 1090 case DW_AT_encoding: 1091 if ( verbose ) s.PutCString(" ( "); 1092 s.PutCString(DW_ATE_value_to_name(form_value.Unsigned())); 1093 if ( verbose ) s.PutCString(" )"); 1094 break; 1095 1096 case DW_AT_frame_base: 1097 case DW_AT_location: 1098 case DW_AT_data_member_location: 1099 { 1100 const uint8_t* blockData = form_value.BlockData(); 1101 if (blockData) 1102 { 1103 if (!verbose) 1104 form_value.Dump(s, debug_str_data, cu); 1105 1106 // Location description is inlined in data in the form value 1107 DataExtractor locationData(debug_info_data, (*offset_ptr) - form_value.Unsigned(), form_value.Unsigned()); 1108 if ( verbose ) s.PutCString(" ( "); 1109 print_dwarf_expression (s, locationData, DWARFCompileUnit::GetAddressByteSize(cu), 4, false); 1110 if ( verbose ) s.PutCString(" )"); 1111 } 1112 else 1113 { 1114 // We have a location list offset as the value that is 1115 // the offset into the .debug_loc section that describes 1116 // the value over it's lifetime 1117 uint64_t debug_loc_offset = form_value.Unsigned(); 1118 if (dwarf2Data) 1119 { 1120 if ( !verbose ) 1121 form_value.Dump(s, debug_str_data, cu); 1122 DWARFLocationList::Dump(s, cu, dwarf2Data->get_debug_loc_data(), debug_loc_offset); 1123 } 1124 else 1125 { 1126 if ( !verbose ) 1127 form_value.Dump(s, NULL, cu); 1128 } 1129 } 1130 } 1131 break; 1132 1133 case DW_AT_abstract_origin: 1134 case DW_AT_specification: 1135 { 1136 uint64_t abstract_die_offset = form_value.Reference(cu); 1137 form_value.Dump(s, debug_str_data, cu); 1138 // *ostrm_ptr << HEX32 << abstract_die_offset << " ( "; 1139 if ( verbose ) s.PutCString(" ( "); 1140 GetName(dwarf2Data, cu, abstract_die_offset, s); 1141 if ( verbose ) s.PutCString(" )"); 1142 } 1143 break; 1144 1145 case DW_AT_type: 1146 { 1147 uint64_t type_die_offset = form_value.Reference(cu); 1148 if (!verbose) 1149 form_value.Dump(s, debug_str_data, cu); 1150 s.PutCString(" ( "); 1151 AppendTypeName(dwarf2Data, cu, type_die_offset, s); 1152 s.PutCString(" )"); 1153 } 1154 break; 1155 1156 case DW_AT_ranges: 1157 { 1158 if ( !verbose ) 1159 form_value.Dump(s, debug_str_data, cu); 1160 uint32_t ranges_offset = form_value.Unsigned(); 1161 dw_addr_t base_addr = cu ? cu->GetBaseAddress() : 0; 1162 if (dwarf2Data) 1163 DWARFDebugRanges::Dump(s, dwarf2Data->get_debug_ranges_data(), &ranges_offset, base_addr); 1164 } 1165 break; 1166 1167 default: 1168 if ( !verbose ) 1169 form_value.Dump(s, debug_str_data, cu); 1170 break; 1171 } 1172 1173 s.PutCString(" )\n"); 1174 } 1175 1176 //---------------------------------------------------------------------- 1177 // Get all attribute values for a given DIE, including following any 1178 // specification or abstract origin attributes and including those in 1179 // the results. Any duplicate attributes will have the first instance 1180 // take precedence (this can happen for declaration attributes). 1181 //---------------------------------------------------------------------- 1182 size_t 1183 DWARFDebugInfoEntry::GetAttributes 1184 ( 1185 SymbolFileDWARF* dwarf2Data, 1186 const DWARFCompileUnit* cu, 1187 const uint8_t *fixed_form_sizes, 1188 DWARFDebugInfoEntry::Attributes& attributes, 1189 uint32_t curr_depth 1190 ) const 1191 { 1192 uint32_t offset; 1193 const DWARFAbbreviationDeclaration* abbrevDecl = GetAbbreviationDeclarationPtr(dwarf2Data, cu, offset); 1194 1195 if (abbrevDecl) 1196 { 1197 const DataExtractor& debug_info_data = dwarf2Data->get_debug_info_data(); 1198 1199 if (fixed_form_sizes == NULL) 1200 fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize(cu->GetAddressByteSize()); 1201 1202 const uint32_t num_attributes = abbrevDecl->NumAttributes(); 1203 uint32_t i; 1204 dw_attr_t attr; 1205 dw_form_t form; 1206 DWARFFormValue form_value; 1207 for (i=0; i<num_attributes; ++i) 1208 { 1209 abbrevDecl->GetAttrAndFormByIndexUnchecked (i, attr, form); 1210 1211 // If we are tracking down DW_AT_specification or DW_AT_abstract_origin 1212 // attributes, the depth will be non-zero. We need to omit certain 1213 // attributes that don't make sense. 1214 switch (attr) 1215 { 1216 case DW_AT_sibling: 1217 case DW_AT_declaration: 1218 if (curr_depth > 0) 1219 { 1220 // This attribute doesn't make sense when combined with 1221 // the DIE that references this DIE. We know a DIE is 1222 // referencing this DIE because curr_depth is not zero 1223 break; 1224 } 1225 // Fall through... 1226 default: 1227 attributes.Append(cu, offset, attr, form); 1228 break; 1229 } 1230 1231 if ((attr == DW_AT_specification) || (attr == DW_AT_abstract_origin)) 1232 { 1233 form_value.SetForm(form); 1234 if (form_value.ExtractValue(debug_info_data, &offset, cu)) 1235 { 1236 const DWARFDebugInfoEntry* die = NULL; 1237 dw_offset_t die_offset = form_value.Reference(cu); 1238 if (cu->ContainsDIEOffset(die_offset)) 1239 { 1240 die = const_cast<DWARFCompileUnit*>(cu)->GetDIEPtr(die_offset); 1241 if (die) 1242 die->GetAttributes(dwarf2Data, cu, fixed_form_sizes, attributes, curr_depth + 1); 1243 } 1244 else 1245 { 1246 DWARFCompileUnitSP cu_sp_ptr; 1247 die = const_cast<SymbolFileDWARF*>(dwarf2Data)->DebugInfo()->GetDIEPtr(die_offset, &cu_sp_ptr); 1248 if (die) 1249 die->GetAttributes(dwarf2Data, cu_sp_ptr.get(), fixed_form_sizes, attributes, curr_depth + 1); 1250 } 1251 } 1252 } 1253 else 1254 { 1255 const uint8_t fixed_skip_size = fixed_form_sizes [form]; 1256 if (fixed_skip_size) 1257 offset += fixed_skip_size; 1258 else 1259 DWARFFormValue::SkipValue(form, debug_info_data, &offset, cu); 1260 } 1261 } 1262 } 1263 else 1264 { 1265 attributes.Clear(); 1266 } 1267 return attributes.Size(); 1268 1269 } 1270 1271 //---------------------------------------------------------------------- 1272 // GetAttributeValue 1273 // 1274 // Get the value of an attribute and return the .debug_info offset of the 1275 // attribute if it was properly extracted into form_value, or zero 1276 // if we fail since an offset of zero is invalid for an attribute (it 1277 // would be a compile unit header). 1278 //---------------------------------------------------------------------- 1279 dw_offset_t 1280 DWARFDebugInfoEntry::GetAttributeValue 1281 ( 1282 SymbolFileDWARF* dwarf2Data, 1283 const DWARFCompileUnit* cu, 1284 const dw_attr_t attr, 1285 DWARFFormValue& form_value, 1286 dw_offset_t* end_attr_offset_ptr 1287 ) const 1288 { 1289 uint32_t offset; 1290 const DWARFAbbreviationDeclaration* abbrevDecl = GetAbbreviationDeclarationPtr(dwarf2Data, cu, offset); 1291 1292 if (abbrevDecl) 1293 { 1294 uint32_t attr_idx = abbrevDecl->FindAttributeIndex(attr); 1295 1296 if (attr_idx != DW_INVALID_INDEX) 1297 { 1298 const DataExtractor& debug_info_data = dwarf2Data->get_debug_info_data(); 1299 1300 uint32_t idx=0; 1301 while (idx<attr_idx) 1302 DWARFFormValue::SkipValue(abbrevDecl->GetFormByIndex(idx++), debug_info_data, &offset, cu); 1303 1304 const dw_offset_t attr_offset = offset; 1305 form_value.SetForm(abbrevDecl->GetFormByIndex(idx)); 1306 if (form_value.ExtractValue(debug_info_data, &offset, cu)) 1307 { 1308 if (end_attr_offset_ptr) 1309 *end_attr_offset_ptr = offset; 1310 return attr_offset; 1311 } 1312 } 1313 } 1314 1315 return 0; 1316 } 1317 1318 //---------------------------------------------------------------------- 1319 // GetAttributeValueAsString 1320 // 1321 // Get the value of an attribute as a string return it. The resulting 1322 // pointer to the string data exists within the supplied SymbolFileDWARF 1323 // and will only be available as long as the SymbolFileDWARF is still around 1324 // and it's content doesn't change. 1325 //---------------------------------------------------------------------- 1326 const char* 1327 DWARFDebugInfoEntry::GetAttributeValueAsString 1328 ( 1329 SymbolFileDWARF* dwarf2Data, 1330 const DWARFCompileUnit* cu, 1331 const dw_attr_t attr, 1332 const char* fail_value) const 1333 { 1334 DWARFFormValue form_value; 1335 if (GetAttributeValue(dwarf2Data, cu, attr, form_value)) 1336 return form_value.AsCString(&dwarf2Data->get_debug_str_data()); 1337 return fail_value; 1338 } 1339 1340 //---------------------------------------------------------------------- 1341 // GetAttributeValueAsUnsigned 1342 // 1343 // Get the value of an attribute as unsigned and return it. 1344 //---------------------------------------------------------------------- 1345 uint64_t 1346 DWARFDebugInfoEntry::GetAttributeValueAsUnsigned 1347 ( 1348 SymbolFileDWARF* dwarf2Data, 1349 const DWARFCompileUnit* cu, 1350 const dw_attr_t attr, 1351 uint64_t fail_value 1352 ) const 1353 { 1354 DWARFFormValue form_value; 1355 if (GetAttributeValue(dwarf2Data, cu, attr, form_value)) 1356 return form_value.Unsigned(); 1357 return fail_value; 1358 } 1359 1360 //---------------------------------------------------------------------- 1361 // GetAttributeValueAsSigned 1362 // 1363 // Get the value of an attribute a signed value and return it. 1364 //---------------------------------------------------------------------- 1365 int64_t 1366 DWARFDebugInfoEntry::GetAttributeValueAsSigned 1367 ( 1368 SymbolFileDWARF* dwarf2Data, 1369 const DWARFCompileUnit* cu, 1370 const dw_attr_t attr, 1371 int64_t fail_value 1372 ) const 1373 { 1374 DWARFFormValue form_value; 1375 if (GetAttributeValue(dwarf2Data, cu, attr, form_value)) 1376 return form_value.Signed(); 1377 return fail_value; 1378 } 1379 1380 //---------------------------------------------------------------------- 1381 // GetAttributeValueAsReference 1382 // 1383 // Get the value of an attribute as reference and fix up and compile 1384 // unit relative offsets as needed. 1385 //---------------------------------------------------------------------- 1386 uint64_t 1387 DWARFDebugInfoEntry::GetAttributeValueAsReference 1388 ( 1389 SymbolFileDWARF* dwarf2Data, 1390 const DWARFCompileUnit* cu, 1391 const dw_attr_t attr, 1392 uint64_t fail_value 1393 ) const 1394 { 1395 DWARFFormValue form_value; 1396 if (GetAttributeValue(dwarf2Data, cu, attr, form_value)) 1397 return form_value.Reference(cu); 1398 return fail_value; 1399 } 1400 1401 //---------------------------------------------------------------------- 1402 // GetAttributeValueAsLocation 1403 // 1404 // Get the value of an attribute as reference and fix up and compile 1405 // unit relative offsets as needed. 1406 //---------------------------------------------------------------------- 1407 dw_offset_t 1408 DWARFDebugInfoEntry::GetAttributeValueAsLocation 1409 ( 1410 SymbolFileDWARF* dwarf2Data, 1411 const DWARFCompileUnit* cu, 1412 const dw_attr_t attr, 1413 DataExtractor& location_data, 1414 uint32_t &block_size 1415 ) const 1416 { 1417 block_size = 0; 1418 DWARFFormValue form_value; 1419 1420 // Empty out data in case we don't find anything 1421 location_data.Clear(); 1422 dw_offset_t end_addr_offset = DW_INVALID_OFFSET; 1423 const dw_offset_t attr_offset = GetAttributeValue(dwarf2Data, cu, attr, form_value, &end_addr_offset); 1424 if (attr_offset) 1425 { 1426 const uint8_t* blockData = form_value.BlockData(); 1427 if (blockData) 1428 { 1429 // We have an inlined location list in the .debug_info section 1430 const DataExtractor& debug_info = dwarf2Data->get_debug_info_data(); 1431 dw_offset_t block_offset = blockData - debug_info.GetDataStart(); 1432 block_size = (end_addr_offset - attr_offset) - form_value.Unsigned(); 1433 location_data.SetData(debug_info, block_offset, block_size); 1434 } 1435 else 1436 { 1437 // We have a location list offset as the value that is 1438 // the offset into the .debug_loc section that describes 1439 // the value over it's lifetime 1440 dw_offset_t debug_loc_offset = form_value.Unsigned(); 1441 if (dwarf2Data) 1442 { 1443 assert(dwarf2Data->get_debug_loc_data().GetAddressByteSize() == cu->GetAddressByteSize()); 1444 return DWARFLocationList::Extract(dwarf2Data->get_debug_loc_data(), &debug_loc_offset, location_data); 1445 } 1446 } 1447 } 1448 return attr_offset; 1449 } 1450 1451 //---------------------------------------------------------------------- 1452 // GetName 1453 // 1454 // Get value of the DW_AT_name attribute and return it if one exists, 1455 // else return NULL. 1456 //---------------------------------------------------------------------- 1457 const char* 1458 DWARFDebugInfoEntry::GetName 1459 ( 1460 SymbolFileDWARF* dwarf2Data, 1461 const DWARFCompileUnit* cu 1462 ) const 1463 { 1464 DWARFFormValue form_value; 1465 if (GetAttributeValue(dwarf2Data, cu, DW_AT_name, form_value)) 1466 return form_value.AsCString(&dwarf2Data->get_debug_str_data()); 1467 return NULL; 1468 } 1469 1470 1471 //---------------------------------------------------------------------- 1472 // GetMangledName 1473 // 1474 // Get value of the DW_AT_MIPS_linkage_name attribute and return it if 1475 // one exists, else return the value of the DW_AT_name attribute 1476 //---------------------------------------------------------------------- 1477 const char* 1478 DWARFDebugInfoEntry::GetMangledName 1479 ( 1480 SymbolFileDWARF* dwarf2Data, 1481 const DWARFCompileUnit* cu, 1482 bool substitute_name_allowed 1483 ) const 1484 { 1485 const char* name = NULL; 1486 DWARFFormValue form_value; 1487 1488 if (GetAttributeValue(dwarf2Data, cu, DW_AT_MIPS_linkage_name, form_value)) 1489 name = form_value.AsCString(&dwarf2Data->get_debug_str_data()); 1490 1491 if (substitute_name_allowed && name == NULL) 1492 { 1493 if (GetAttributeValue(dwarf2Data, cu, DW_AT_name, form_value)) 1494 name = form_value.AsCString(&dwarf2Data->get_debug_str_data()); 1495 } 1496 return name; 1497 } 1498 1499 1500 //---------------------------------------------------------------------- 1501 // GetPubname 1502 // 1503 // Get value the name for a DIE as it should appear for a 1504 // .debug_pubnames or .debug_pubtypes section. 1505 //---------------------------------------------------------------------- 1506 const char* 1507 DWARFDebugInfoEntry::GetPubname 1508 ( 1509 SymbolFileDWARF* dwarf2Data, 1510 const DWARFCompileUnit* cu 1511 ) const 1512 { 1513 const char* name = NULL; 1514 if (!dwarf2Data) 1515 return name; 1516 1517 DWARFFormValue form_value; 1518 1519 if (GetAttributeValue(dwarf2Data, cu, DW_AT_MIPS_linkage_name, form_value)) 1520 name = form_value.AsCString(&dwarf2Data->get_debug_str_data()); 1521 else if (GetAttributeValue(dwarf2Data, cu, DW_AT_name, form_value)) 1522 name = form_value.AsCString(&dwarf2Data->get_debug_str_data()); 1523 else if (GetAttributeValue(dwarf2Data, cu, DW_AT_specification, form_value)) 1524 { 1525 // The specification DIE may be in another compile unit so we need 1526 // to get a die and its compile unit. 1527 DWARFCompileUnitSP cu_sp_ptr; 1528 const DWARFDebugInfoEntry* die = const_cast<SymbolFileDWARF*>(dwarf2Data)->DebugInfo()->GetDIEPtr(form_value.Reference(cu), &cu_sp_ptr); 1529 if (die) 1530 return die->GetPubname(dwarf2Data, cu_sp_ptr.get()); 1531 } 1532 return name; 1533 } 1534 1535 1536 //---------------------------------------------------------------------- 1537 // GetName 1538 // 1539 // Get value of the DW_AT_name attribute for a debug information entry 1540 // that exists at offset "die_offset" and place that value into the 1541 // supplied stream object. If the DIE is a NULL object "NULL" is placed 1542 // into the stream, and if no DW_AT_name attribute exists for the DIE 1543 // then nothing is printed. 1544 //---------------------------------------------------------------------- 1545 bool 1546 DWARFDebugInfoEntry::GetName 1547 ( 1548 SymbolFileDWARF* dwarf2Data, 1549 const DWARFCompileUnit* cu, 1550 const uint32_t die_offset, 1551 Stream &s 1552 ) 1553 { 1554 if (dwarf2Data == NULL) 1555 { 1556 s.PutCString("NULL"); 1557 return false; 1558 } 1559 1560 DWARFDebugInfoEntry die; 1561 uint32_t offset = die_offset; 1562 if (die.Extract(dwarf2Data, cu, &offset)) 1563 { 1564 if (die.IsNULL()) 1565 { 1566 s.PutCString("NULL"); 1567 return true; 1568 } 1569 else 1570 { 1571 DWARFFormValue form_value; 1572 if (die.GetAttributeValue(dwarf2Data, cu, DW_AT_name, form_value)) 1573 { 1574 const char* name = form_value.AsCString(&dwarf2Data->get_debug_str_data()); 1575 if (name) 1576 { 1577 s.PutCString(name); 1578 return true; 1579 } 1580 } 1581 } 1582 } 1583 return false; 1584 } 1585 1586 //---------------------------------------------------------------------- 1587 // AppendTypeName 1588 // 1589 // Follows the type name definition down through all needed tags to 1590 // end up with a fully qualified type name and dump the results to 1591 // the supplied stream. This is used to show the name of types given 1592 // a type identifier. 1593 //---------------------------------------------------------------------- 1594 bool 1595 DWARFDebugInfoEntry::AppendTypeName 1596 ( 1597 SymbolFileDWARF* dwarf2Data, 1598 const DWARFCompileUnit* cu, 1599 const uint32_t die_offset, 1600 Stream &s 1601 ) 1602 { 1603 if (dwarf2Data == NULL) 1604 { 1605 s.PutCString("NULL"); 1606 return false; 1607 } 1608 1609 DWARFDebugInfoEntry die; 1610 uint32_t offset = die_offset; 1611 if (die.Extract(dwarf2Data, cu, &offset)) 1612 { 1613 if (die.IsNULL()) 1614 { 1615 s.PutCString("NULL"); 1616 return true; 1617 } 1618 else 1619 { 1620 const char* name = die.GetPubname(dwarf2Data, cu); 1621 // if (die.GetAttributeValue(dwarf2Data, cu, DW_AT_name, form_value)) 1622 // name = form_value.AsCString(&dwarf2Data->get_debug_str_data()); 1623 if (name) 1624 s.PutCString(name); 1625 else 1626 { 1627 bool result = true; 1628 const DWARFAbbreviationDeclaration* abbrevDecl = die.GetAbbreviationDeclarationPtr(dwarf2Data, cu, offset); 1629 1630 if (abbrevDecl == NULL) 1631 return false; 1632 1633 switch (abbrevDecl->Tag()) 1634 { 1635 case DW_TAG_array_type: break; // print out a "[]" after printing the full type of the element below 1636 case DW_TAG_base_type: s.PutCString("base "); break; 1637 case DW_TAG_class_type: s.PutCString("class "); break; 1638 case DW_TAG_const_type: s.PutCString("const "); break; 1639 case DW_TAG_enumeration_type: s.PutCString("enum "); break; 1640 case DW_TAG_file_type: s.PutCString("file "); break; 1641 case DW_TAG_interface_type: s.PutCString("interface "); break; 1642 case DW_TAG_packed_type: s.PutCString("packed "); break; 1643 case DW_TAG_pointer_type: break; // print out a '*' after printing the full type below 1644 case DW_TAG_ptr_to_member_type: break; // print out a '*' after printing the full type below 1645 case DW_TAG_reference_type: break; // print out a '&' after printing the full type below 1646 case DW_TAG_restrict_type: s.PutCString("restrict "); break; 1647 case DW_TAG_set_type: s.PutCString("set "); break; 1648 case DW_TAG_shared_type: s.PutCString("shared "); break; 1649 case DW_TAG_string_type: s.PutCString("string "); break; 1650 case DW_TAG_structure_type: s.PutCString("struct "); break; 1651 case DW_TAG_subrange_type: s.PutCString("subrange "); break; 1652 case DW_TAG_subroutine_type: s.PutCString("function "); break; 1653 case DW_TAG_thrown_type: s.PutCString("thrown "); break; 1654 case DW_TAG_union_type: s.PutCString("union "); break; 1655 case DW_TAG_unspecified_type: s.PutCString("unspecified "); break; 1656 case DW_TAG_volatile_type: s.PutCString("volatile "); break; 1657 default: 1658 return false; 1659 } 1660 1661 // Follow the DW_AT_type if possible 1662 DWARFFormValue form_value; 1663 if (die.GetAttributeValue(dwarf2Data, cu, DW_AT_type, form_value)) 1664 { 1665 uint64_t next_die_offset = form_value.Reference(cu); 1666 result = AppendTypeName(dwarf2Data, cu, next_die_offset, s); 1667 } 1668 1669 switch (abbrevDecl->Tag()) 1670 { 1671 case DW_TAG_array_type: s.PutCString("[]"); break; 1672 case DW_TAG_pointer_type: s.PutChar('*'); break; 1673 case DW_TAG_ptr_to_member_type: s.PutChar('*'); break; 1674 case DW_TAG_reference_type: s.PutChar('&'); break; 1675 default: 1676 break; 1677 } 1678 return result; 1679 } 1680 } 1681 } 1682 return false; 1683 } 1684 1685 bool 1686 DWARFDebugInfoEntry::Contains (const DWARFDebugInfoEntry *die) const 1687 { 1688 if (die) 1689 { 1690 const dw_offset_t die_offset = die->GetOffset(); 1691 if (die_offset > GetOffset()) 1692 { 1693 const DWARFDebugInfoEntry *sibling = GetSibling(); 1694 assert (sibling); // TODO: take this out 1695 if (sibling) 1696 return die_offset < sibling->GetOffset(); 1697 } 1698 } 1699 return false; 1700 } 1701 1702 //---------------------------------------------------------------------- 1703 // BuildAddressRangeTable 1704 //---------------------------------------------------------------------- 1705 void 1706 DWARFDebugInfoEntry::BuildAddressRangeTable 1707 ( 1708 SymbolFileDWARF* dwarf2Data, 1709 const DWARFCompileUnit* cu, 1710 DWARFDebugAranges* debug_aranges 1711 ) const 1712 { 1713 if (m_tag) 1714 { 1715 if (m_tag == DW_TAG_subprogram) 1716 { 1717 dw_addr_t hi_pc = DW_INVALID_ADDRESS; 1718 dw_addr_t lo_pc = GetAttributeValueAsUnsigned(dwarf2Data, cu, DW_AT_low_pc, DW_INVALID_ADDRESS); 1719 if (lo_pc != DW_INVALID_ADDRESS) 1720 hi_pc = GetAttributeValueAsUnsigned(dwarf2Data, cu, DW_AT_high_pc, DW_INVALID_ADDRESS); 1721 if (hi_pc != DW_INVALID_ADDRESS) 1722 { 1723 /// 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); 1724 debug_aranges->AppendRange (cu->GetOffset(), lo_pc, hi_pc); 1725 } 1726 } 1727 1728 1729 const DWARFDebugInfoEntry* child = GetFirstChild(); 1730 while (child) 1731 { 1732 child->BuildAddressRangeTable(dwarf2Data, cu, debug_aranges); 1733 child = child->GetSibling(); 1734 } 1735 } 1736 } 1737 1738 //---------------------------------------------------------------------- 1739 // BuildFunctionAddressRangeTable 1740 // 1741 // This function is very similar to the BuildAddressRangeTable function 1742 // except that the actual DIE offset for the function is placed in the 1743 // table instead of the compile unit offset (which is the way the 1744 // standard .debug_aranges section does it). 1745 //---------------------------------------------------------------------- 1746 void 1747 DWARFDebugInfoEntry::BuildFunctionAddressRangeTable 1748 ( 1749 SymbolFileDWARF* dwarf2Data, 1750 const DWARFCompileUnit* cu, 1751 DWARFDebugAranges* debug_aranges 1752 ) const 1753 { 1754 if (m_tag) 1755 { 1756 if (m_tag == DW_TAG_subprogram) 1757 { 1758 dw_addr_t hi_pc = DW_INVALID_ADDRESS; 1759 dw_addr_t lo_pc = GetAttributeValueAsUnsigned(dwarf2Data, cu, DW_AT_low_pc, DW_INVALID_ADDRESS); 1760 if (lo_pc != DW_INVALID_ADDRESS) 1761 hi_pc = GetAttributeValueAsUnsigned(dwarf2Data, cu, DW_AT_high_pc, DW_INVALID_ADDRESS); 1762 if (hi_pc != DW_INVALID_ADDRESS) 1763 { 1764 // printf("BuildAddressRangeTable() 0x%8.8x: [0x%16.16llx - 0x%16.16llx)\n", m_offset, lo_pc, hi_pc); // DEBUG ONLY 1765 debug_aranges->AppendRange (GetOffset(), lo_pc, hi_pc); 1766 } 1767 } 1768 1769 const DWARFDebugInfoEntry* child = GetFirstChild(); 1770 while (child) 1771 { 1772 child->BuildFunctionAddressRangeTable(dwarf2Data, cu, debug_aranges); 1773 child = child->GetSibling(); 1774 } 1775 } 1776 } 1777 1778 void 1779 DWARFDebugInfoEntry::GetDeclContextDIEs (SymbolFileDWARF* dwarf2Data, 1780 DWARFCompileUnit* cu, 1781 DWARFDIECollection &decl_context_dies) const 1782 { 1783 const DWARFDebugInfoEntry *parent_decl_ctx_die = GetParentDeclContextDIE (dwarf2Data, cu); 1784 if (parent_decl_ctx_die && parent_decl_ctx_die != this) 1785 { 1786 decl_context_dies.Append(parent_decl_ctx_die); 1787 parent_decl_ctx_die->GetDeclContextDIEs (dwarf2Data, cu, decl_context_dies); 1788 } 1789 } 1790 1791 void 1792 DWARFDebugInfoEntry::GetDWARFDeclContext (SymbolFileDWARF* dwarf2Data, 1793 DWARFCompileUnit* cu, 1794 DWARFDeclContext &dwarf_decl_ctx) const 1795 { 1796 const dw_tag_t tag = Tag(); 1797 if (tag != DW_TAG_compile_unit) 1798 { 1799 dwarf_decl_ctx.AppendDeclContext(tag, GetName(dwarf2Data, cu)); 1800 const DWARFDebugInfoEntry *parent_decl_ctx_die = GetParentDeclContextDIE (dwarf2Data, cu); 1801 if (parent_decl_ctx_die && parent_decl_ctx_die != this) 1802 { 1803 if (parent_decl_ctx_die->Tag() != DW_TAG_compile_unit) 1804 parent_decl_ctx_die->GetDWARFDeclContext (dwarf2Data, cu, dwarf_decl_ctx); 1805 } 1806 } 1807 } 1808 1809 1810 bool 1811 DWARFDebugInfoEntry::MatchesDWARFDeclContext (SymbolFileDWARF* dwarf2Data, 1812 DWARFCompileUnit* cu, 1813 const DWARFDeclContext &dwarf_decl_ctx) const 1814 { 1815 1816 DWARFDeclContext this_dwarf_decl_ctx; 1817 GetDWARFDeclContext (dwarf2Data, cu, this_dwarf_decl_ctx); 1818 return this_dwarf_decl_ctx == dwarf_decl_ctx; 1819 } 1820 1821 const DWARFDebugInfoEntry * 1822 DWARFDebugInfoEntry::GetParentDeclContextDIE (SymbolFileDWARF* dwarf2Data, 1823 DWARFCompileUnit* cu) const 1824 { 1825 DWARFDebugInfoEntry::Attributes attributes; 1826 GetAttributes(dwarf2Data, cu, NULL, attributes); 1827 return GetParentDeclContextDIE (dwarf2Data, cu, attributes); 1828 } 1829 1830 const DWARFDebugInfoEntry * 1831 DWARFDebugInfoEntry::GetParentDeclContextDIE (SymbolFileDWARF* dwarf2Data, 1832 DWARFCompileUnit* cu, 1833 const DWARFDebugInfoEntry::Attributes& attributes) const 1834 { 1835 const DWARFDebugInfoEntry * die = this; 1836 1837 while (die != NULL) 1838 { 1839 // If this is the original DIE that we are searching for a declaration 1840 // for, then don't look in the cache as we don't want our own decl 1841 // context to be our decl context... 1842 if (die != this) 1843 { 1844 switch (die->Tag()) 1845 { 1846 case DW_TAG_compile_unit: 1847 case DW_TAG_namespace: 1848 case DW_TAG_structure_type: 1849 case DW_TAG_union_type: 1850 case DW_TAG_class_type: 1851 return die; 1852 1853 default: 1854 break; 1855 } 1856 } 1857 1858 dw_offset_t die_offset; 1859 1860 die_offset = attributes.FormValueAsUnsigned(dwarf2Data, DW_AT_specification, DW_INVALID_OFFSET); 1861 if (die_offset != DW_INVALID_OFFSET) 1862 { 1863 const DWARFDebugInfoEntry *spec_die = cu->GetDIEPtr (die_offset); 1864 if (spec_die) 1865 { 1866 const DWARFDebugInfoEntry *spec_die_decl_ctx_die = spec_die->GetParentDeclContextDIE (dwarf2Data, cu); 1867 if (spec_die_decl_ctx_die) 1868 return spec_die_decl_ctx_die; 1869 } 1870 } 1871 1872 die_offset = attributes.FormValueAsUnsigned(dwarf2Data, DW_AT_abstract_origin, DW_INVALID_OFFSET); 1873 if (die_offset != DW_INVALID_OFFSET) 1874 { 1875 const DWARFDebugInfoEntry *abs_die = cu->GetDIEPtr (die_offset); 1876 if (abs_die) 1877 { 1878 const DWARFDebugInfoEntry *abs_die_decl_ctx_die = abs_die->GetParentDeclContextDIE (dwarf2Data, cu); 1879 if (abs_die_decl_ctx_die) 1880 return abs_die_decl_ctx_die; 1881 } 1882 } 1883 1884 die = die->GetParent(); 1885 } 1886 return NULL; 1887 } 1888 1889 1890 const char * 1891 DWARFDebugInfoEntry::GetQualifiedName (SymbolFileDWARF* dwarf2Data, 1892 DWARFCompileUnit* cu, 1893 std::string &storage) const 1894 { 1895 DWARFDebugInfoEntry::Attributes attributes; 1896 GetAttributes(dwarf2Data, cu, NULL, attributes); 1897 return GetQualifiedName (dwarf2Data, cu, attributes, storage); 1898 } 1899 1900 const char* 1901 DWARFDebugInfoEntry::GetQualifiedName (SymbolFileDWARF* dwarf2Data, 1902 DWARFCompileUnit* cu, 1903 const DWARFDebugInfoEntry::Attributes& attributes, 1904 std::string &storage) const 1905 { 1906 1907 const char *name = GetName (dwarf2Data, cu); 1908 1909 if (name) 1910 { 1911 const DWARFDebugInfoEntry *parent_decl_ctx_die = GetParentDeclContextDIE (dwarf2Data, cu); 1912 storage.clear(); 1913 // TODO: change this to get the correct decl context parent.... 1914 while (parent_decl_ctx_die) 1915 { 1916 const dw_tag_t parent_tag = parent_decl_ctx_die->Tag(); 1917 switch (parent_tag) 1918 { 1919 case DW_TAG_namespace: 1920 { 1921 const char *namespace_name = parent_decl_ctx_die->GetName (dwarf2Data, cu); 1922 if (namespace_name) 1923 { 1924 storage.insert (0, "::"); 1925 storage.insert (0, namespace_name); 1926 } 1927 else 1928 { 1929 storage.insert (0, "(anonymous namespace)::"); 1930 } 1931 parent_decl_ctx_die = parent_decl_ctx_die->GetParentDeclContextDIE(dwarf2Data, cu); 1932 } 1933 break; 1934 1935 case DW_TAG_class_type: 1936 case DW_TAG_structure_type: 1937 case DW_TAG_union_type: 1938 { 1939 const char *class_union_struct_name = parent_decl_ctx_die->GetName (dwarf2Data, cu); 1940 1941 if (class_union_struct_name) 1942 { 1943 storage.insert (0, "::"); 1944 storage.insert (0, class_union_struct_name); 1945 } 1946 parent_decl_ctx_die = parent_decl_ctx_die->GetParentDeclContextDIE(dwarf2Data, cu); 1947 } 1948 break; 1949 1950 default: 1951 parent_decl_ctx_die = NULL; 1952 break; 1953 } 1954 } 1955 1956 if (storage.empty()) 1957 storage.append ("::"); 1958 1959 storage.append (name); 1960 } 1961 if (storage.empty()) 1962 return NULL; 1963 return storage.c_str(); 1964 } 1965 1966 1967 //---------------------------------------------------------------------- 1968 // LookupAddress 1969 //---------------------------------------------------------------------- 1970 bool 1971 DWARFDebugInfoEntry::LookupAddress 1972 ( 1973 const dw_addr_t address, 1974 SymbolFileDWARF* dwarf2Data, 1975 const DWARFCompileUnit* cu, 1976 DWARFDebugInfoEntry** function_die, 1977 DWARFDebugInfoEntry** block_die 1978 ) 1979 { 1980 bool found_address = false; 1981 if (m_tag) 1982 { 1983 bool check_children = false; 1984 bool match_addr_range = false; 1985 // printf("0x%8.8x: %30s: address = 0x%8.8x - ", m_offset, DW_TAG_value_to_name(tag), address); 1986 switch (m_tag) 1987 { 1988 case DW_TAG_array_type : break; 1989 case DW_TAG_class_type : check_children = true; break; 1990 case DW_TAG_entry_point : break; 1991 case DW_TAG_enumeration_type : break; 1992 case DW_TAG_formal_parameter : break; 1993 case DW_TAG_imported_declaration : break; 1994 case DW_TAG_label : break; 1995 case DW_TAG_lexical_block : check_children = true; match_addr_range = true; break; 1996 case DW_TAG_member : break; 1997 case DW_TAG_pointer_type : break; 1998 case DW_TAG_reference_type : break; 1999 case DW_TAG_compile_unit : match_addr_range = true; break; 2000 case DW_TAG_string_type : break; 2001 case DW_TAG_structure_type : check_children = true; break; 2002 case DW_TAG_subroutine_type : break; 2003 case DW_TAG_typedef : break; 2004 case DW_TAG_union_type : break; 2005 case DW_TAG_unspecified_parameters : break; 2006 case DW_TAG_variant : break; 2007 case DW_TAG_common_block : check_children = true; break; 2008 case DW_TAG_common_inclusion : break; 2009 case DW_TAG_inheritance : break; 2010 case DW_TAG_inlined_subroutine : check_children = true; match_addr_range = true; break; 2011 case DW_TAG_module : match_addr_range = true; break; 2012 case DW_TAG_ptr_to_member_type : break; 2013 case DW_TAG_set_type : break; 2014 case DW_TAG_subrange_type : break; 2015 case DW_TAG_with_stmt : break; 2016 case DW_TAG_access_declaration : break; 2017 case DW_TAG_base_type : break; 2018 case DW_TAG_catch_block : match_addr_range = true; break; 2019 case DW_TAG_const_type : break; 2020 case DW_TAG_constant : break; 2021 case DW_TAG_enumerator : break; 2022 case DW_TAG_file_type : break; 2023 case DW_TAG_friend : break; 2024 case DW_TAG_namelist : break; 2025 case DW_TAG_namelist_item : break; 2026 case DW_TAG_packed_type : break; 2027 case DW_TAG_subprogram : match_addr_range = true; break; 2028 case DW_TAG_template_type_parameter : break; 2029 case DW_TAG_template_value_parameter : break; 2030 case DW_TAG_thrown_type : break; 2031 case DW_TAG_try_block : match_addr_range = true; break; 2032 case DW_TAG_variant_part : break; 2033 case DW_TAG_variable : break; 2034 case DW_TAG_volatile_type : break; 2035 case DW_TAG_dwarf_procedure : break; 2036 case DW_TAG_restrict_type : break; 2037 case DW_TAG_interface_type : break; 2038 case DW_TAG_namespace : check_children = true; break; 2039 case DW_TAG_imported_module : break; 2040 case DW_TAG_unspecified_type : break; 2041 case DW_TAG_partial_unit : break; 2042 case DW_TAG_imported_unit : break; 2043 case DW_TAG_shared_type : break; 2044 default: break; 2045 } 2046 2047 if (match_addr_range) 2048 { 2049 dw_addr_t lo_pc = GetAttributeValueAsUnsigned(dwarf2Data, cu, DW_AT_low_pc, DW_INVALID_ADDRESS); 2050 if (lo_pc != DW_INVALID_ADDRESS) 2051 { 2052 dw_addr_t hi_pc = GetAttributeValueAsUnsigned(dwarf2Data, cu, DW_AT_high_pc, DW_INVALID_ADDRESS); 2053 if (hi_pc != DW_INVALID_ADDRESS) 2054 { 2055 // 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); 2056 if ((lo_pc <= address) && (address < hi_pc)) 2057 { 2058 found_address = true; 2059 // puts("***MATCH***"); 2060 switch (m_tag) 2061 { 2062 case DW_TAG_compile_unit: // File 2063 check_children = ((function_die != NULL) || (block_die != NULL)); 2064 break; 2065 2066 case DW_TAG_subprogram: // Function 2067 if (function_die) 2068 *function_die = this; 2069 check_children = (block_die != NULL); 2070 break; 2071 2072 case DW_TAG_inlined_subroutine: // Inlined Function 2073 case DW_TAG_lexical_block: // Block { } in code 2074 if (block_die) 2075 { 2076 *block_die = this; 2077 check_children = true; 2078 } 2079 break; 2080 2081 default: 2082 check_children = true; 2083 break; 2084 } 2085 } 2086 } 2087 else 2088 { // compile units may not have a valid high/low pc when there 2089 // are address gaps in subroutines so we must always search 2090 // if there is no valid high and low PC 2091 check_children = (m_tag == DW_TAG_compile_unit) && ((function_die != NULL) || (block_die != NULL)); 2092 } 2093 } 2094 else 2095 { 2096 dw_offset_t debug_ranges_offset = GetAttributeValueAsUnsigned(dwarf2Data, cu, DW_AT_ranges, DW_INVALID_OFFSET); 2097 if (debug_ranges_offset != DW_INVALID_OFFSET) 2098 { 2099 DWARFDebugRanges::RangeList ranges; 2100 DWARFDebugRanges* debug_ranges = dwarf2Data->DebugRanges(); 2101 debug_ranges->FindRanges(debug_ranges_offset, ranges); 2102 // All DW_AT_ranges are relative to the base address of the 2103 // compile unit. We add the compile unit base address to make 2104 // sure all the addresses are properly fixed up. 2105 ranges.Slide (cu->GetBaseAddress()); 2106 if (ranges.FindEntryThatContains(address)) 2107 { 2108 found_address = true; 2109 // puts("***MATCH***"); 2110 switch (m_tag) 2111 { 2112 case DW_TAG_compile_unit: // File 2113 check_children = ((function_die != NULL) || (block_die != NULL)); 2114 break; 2115 2116 case DW_TAG_subprogram: // Function 2117 if (function_die) 2118 *function_die = this; 2119 check_children = (block_die != NULL); 2120 break; 2121 2122 case DW_TAG_inlined_subroutine: // Inlined Function 2123 case DW_TAG_lexical_block: // Block { } in code 2124 if (block_die) 2125 { 2126 *block_die = this; 2127 check_children = true; 2128 } 2129 break; 2130 2131 default: 2132 check_children = true; 2133 break; 2134 } 2135 } 2136 else 2137 { 2138 check_children = false; 2139 } 2140 } 2141 } 2142 } 2143 2144 2145 if (check_children) 2146 { 2147 // printf("checking children\n"); 2148 DWARFDebugInfoEntry* child = GetFirstChild(); 2149 while (child) 2150 { 2151 if (child->LookupAddress(address, dwarf2Data, cu, function_die, block_die)) 2152 return true; 2153 child = child->GetSibling(); 2154 } 2155 } 2156 } 2157 return found_address; 2158 } 2159 2160 const DWARFAbbreviationDeclaration* 2161 DWARFDebugInfoEntry::GetAbbreviationDeclarationPtr (SymbolFileDWARF* dwarf2Data, 2162 const DWARFCompileUnit *cu, 2163 dw_offset_t &offset) const 2164 { 2165 if (dwarf2Data) 2166 { 2167 offset = GetOffset(); 2168 2169 const DWARFAbbreviationDeclaration* abbrev_decl = cu->GetAbbreviations()->GetAbbreviationDeclaration (m_abbr_idx); 2170 if (abbrev_decl) 2171 { 2172 // Make sure the abbreviation code still matches. If it doesn't and 2173 // the DWARF data was mmap'ed, the backing file might have been modified 2174 // which is bad news. 2175 const uint64_t abbrev_code = dwarf2Data->get_debug_info_data().GetULEB128 (&offset); 2176 2177 if (abbrev_decl->Code() == abbrev_code) 2178 return abbrev_decl; 2179 2180 dwarf2Data->GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("0x%8.8x: the DWARF debug information has been modified (abbrev code was %u, and is now %u)", 2181 GetOffset(), 2182 (uint32_t)abbrev_decl->Code(), 2183 (uint32_t)abbrev_code); 2184 } 2185 } 2186 offset = DW_INVALID_OFFSET; 2187 return NULL; 2188 } 2189 2190 2191 bool 2192 DWARFDebugInfoEntry::OffsetLessThan (const DWARFDebugInfoEntry& a, const DWARFDebugInfoEntry& b) 2193 { 2194 return a.GetOffset() < b.GetOffset(); 2195 } 2196 2197 void 2198 DWARFDebugInfoEntry::DumpDIECollection (Stream &strm, DWARFDebugInfoEntry::collection &die_collection) 2199 { 2200 DWARFDebugInfoEntry::const_iterator pos; 2201 DWARFDebugInfoEntry::const_iterator end = die_collection.end(); 2202 strm.PutCString("\noffset parent sibling child\n"); 2203 strm.PutCString("-------- -------- -------- --------\n"); 2204 for (pos = die_collection.begin(); pos != end; ++pos) 2205 { 2206 const DWARFDebugInfoEntry& die_ref = *pos; 2207 const DWARFDebugInfoEntry* p = die_ref.GetParent(); 2208 const DWARFDebugInfoEntry* s = die_ref.GetSibling(); 2209 const DWARFDebugInfoEntry* c = die_ref.GetFirstChild(); 2210 strm.Printf("%.8x: %.8x %.8x %.8x 0x%4.4x %s%s\n", 2211 die_ref.GetOffset(), 2212 p ? p->GetOffset() : 0, 2213 s ? s->GetOffset() : 0, 2214 c ? c->GetOffset() : 0, 2215 die_ref.Tag(), 2216 DW_TAG_value_to_name(die_ref.Tag()), 2217 die_ref.HasChildren() ? " *" : ""); 2218 } 2219 } 2220 2221 2222