contrib/llvm/tools/lldb/source/Plugins/SymbolFile/DWARF/DWARFDebugInfoEntry.cpp

   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     lldb::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     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         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                         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 //----------------------------------------------------------------------
 276 bool
 277 DWARFDebugInfoEntry::Extract
 278 (
 279     SymbolFileDWARF* dwarf2Data,
 280     const DWARFCompileUnit* cu,
 281     lldb::offset_t *offset_ptr
 282 )
 283 {
 284     const DataExtractor& debug_info_data = dwarf2Data->get_debug_info_data();
 285 //    const DataExtractor& 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                             register 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 //----------------------------------------------------------------------
 445 void
 446 DWARFDebugInfoEntry::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 DataExtractor* 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 //----------------------------------------------------------------------
 738 bool
 739 DWARFDebugInfoEntry::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     if (abbrevDecl)
 767     {
 768         const DataExtractor& debug_info_data = dwarf2Data->get_debug_info_data();
 769
 770         if (!debug_info_data.ValidOffset(offset))
 771             return false;
 772
 773         const uint32_t numAttributes = abbrevDecl->NumAttributes();
 774         uint32_t i;
 775         dw_attr_t attr;
 776         dw_form_t form;
 777         bool do_offset = false;
 778
 779         for (i=0; i<numAttributes; ++i)
 780         {
 781             abbrevDecl->GetAttrAndFormByIndexUnchecked(i, attr, form);
 782             DWARFFormValue form_value(form);
 783             if (form_value.ExtractValue(debug_info_data, &offset, cu))
 784             {
 785                 switch (attr)
 786                 {
 787                 case DW_AT_low_pc:
 788                     lo_pc = form_value.Unsigned();
 789
 790                     if (do_offset)
 791                         hi_pc += lo_pc;
 792                     do_offset = false;
 793                     break;
 794
 795                 case DW_AT_entry_pc:
 796                     lo_pc = form_value.Unsigned();
 797                     break;
 798
 799                 case DW_AT_high_pc:
 800                     hi_pc = form_value.Unsigned();
 801                     if (form_value.Form() != DW_FORM_addr)
 802                     {
 803                         if (lo_pc == LLDB_INVALID_ADDRESS)
 804                             do_offset = hi_pc != LLDB_INVALID_ADDRESS;
 805                         else
 806                             hi_pc += lo_pc; // DWARF 4 introduces <offset-from-lo-pc> to save on relocations
 807                     }
 808                     break;
 809
 810                 case DW_AT_ranges:
 811                     {
 812                         const DWARFDebugRanges* debug_ranges = dwarf2Data->DebugRanges();
 813                         debug_ranges->FindRanges(form_value.Unsigned(), ranges);
 814                         // All DW_AT_ranges are relative to the base address of the
 815                         // compile unit. We add the compile unit base address to make
 816                         // sure all the addresses are properly fixed up.
 817                         ranges.Slide(cu->GetBaseAddress());
 818                     }
 819                     break;
 820
 821                 case DW_AT_name:
 822                     if (name == NULL)
 823                         name = form_value.AsCString(&dwarf2Data->get_debug_str_data());
 824                     break;
 825
 826                 case DW_AT_MIPS_linkage_name:
 827                 case DW_AT_linkage_name:
 828                     if (mangled == NULL)
 829                         mangled = form_value.AsCString(&dwarf2Data->get_debug_str_data());
 830                     break;
 831
 832                 case DW_AT_abstract_origin:
 833                     die_offsets.push_back(form_value.Reference(cu));
 834                     break;
 835
 836                 case DW_AT_specification:
 837                     die_offsets.push_back(form_value.Reference(cu));
 838                     break;
 839
 840                 case DW_AT_decl_file:
 841                     if (decl_file == 0)
 842                         decl_file = form_value.Unsigned();
 843                     break;
 844
 845                 case DW_AT_decl_line:
 846                     if (decl_line == 0)
 847                         decl_line = form_value.Unsigned();
 848                     break;
 849
 850                 case DW_AT_decl_column:
 851                     if (decl_column == 0)
 852                         decl_column = form_value.Unsigned();
 853                     break;
 854
 855                 case DW_AT_call_file:
 856                     if (call_file == 0)
 857                         call_file = form_value.Unsigned();
 858                     break;
 859
 860                 case DW_AT_call_line:
 861                     if (call_line == 0)
 862                         call_line = form_value.Unsigned();
 863                     break;
 864
 865                 case DW_AT_call_column:
 866                     if (call_column == 0)
 867                         call_column = form_value.Unsigned();
 868                     break;
 869
 870                 case DW_AT_frame_base:
 871                     if (frame_base)
 872                     {
 873                         if (form_value.BlockData())
 874                         {
 875                             uint32_t block_offset = form_value.BlockData() - debug_info_data.GetDataStart();
 876                             uint32_t block_length = form_value.Unsigned();
 877                             frame_base->SetOpcodeData(debug_info_data, block_offset, block_length);
 878                         }
 879                         else
 880                         {
 881                             const DataExtractor &debug_loc_data = dwarf2Data->get_debug_loc_data();
 882                             const dw_offset_t debug_loc_offset = form_value.Unsigned();
 883
 884                             size_t loc_list_length = DWARFLocationList::Size(debug_loc_data, debug_loc_offset);
 885                             if (loc_list_length > 0)
 886                             {
 887                                 frame_base->SetOpcodeData(debug_loc_data, debug_loc_offset, loc_list_length);
 888                                 if (lo_pc != LLDB_INVALID_ADDRESS)
 889                                 {
 890                                     assert (lo_pc >= cu->GetBaseAddress());
 891                                     frame_base->SetLocationListSlide(lo_pc - cu->GetBaseAddress());
 892                                 }
 893                                 else
 894                                 {
 895                                     set_frame_base_loclist_addr = true;
 896                                 }
 897                             }
 898                         }
 899                     }
 900                     break;
 901
 902                 default:
 903                     break;
 904                 }
 905             }
 906         }
 907     }
 908
 909     if (ranges.IsEmpty())
 910     {
 911         if (lo_pc != LLDB_INVALID_ADDRESS)
 912         {
 913             if (hi_pc != LLDB_INVALID_ADDRESS && hi_pc > lo_pc)
 914                 ranges.Append(DWARFDebugRanges::Range (lo_pc, hi_pc - lo_pc));
 915             else
 916                 ranges.Append(DWARFDebugRanges::Range (lo_pc, 0));
 917         }
 918     }
 919
 920     if (set_frame_base_loclist_addr)
 921     {
 922         dw_addr_t lowest_range_pc = ranges.GetMinRangeBase(0);
 923         assert (lowest_range_pc >= cu->GetBaseAddress());
 924         frame_base->SetLocationListSlide (lowest_range_pc - cu->GetBaseAddress());
 925     }
 926
 927     if (ranges.IsEmpty() || name == NULL || mangled == NULL)
 928     {
 929         std::vector<dw_offset_t>::const_iterator pos;
 930         std::vector<dw_offset_t>::const_iterator end = die_offsets.end();
 931         for (pos = die_offsets.begin(); pos != end; ++pos)
 932         {
 933             DWARFCompileUnitSP cu_sp_ptr;
 934             const DWARFDebugInfoEntry* die = NULL;
 935             dw_offset_t die_offset = *pos;
 936             if (die_offset != DW_INVALID_OFFSET)
 937             {
 938                 die = dwarf2Data->DebugInfo()->GetDIEPtr(die_offset, &cu_sp_ptr);
 939                 if (die)
 940                     die->GetDIENamesAndRanges(dwarf2Data, cu_sp_ptr.get(), name, mangled, ranges, decl_file, decl_line, decl_column, call_file, call_line, call_column);
 941             }
 942         }
 943     }
 944     return !ranges.IsEmpty();
 945 }
 946
 947 //----------------------------------------------------------------------
 948 // Dump
 949 //
 950 // Dumps a debug information entry and all of it's attributes to the
 951 // specified stream.
 952 //----------------------------------------------------------------------
 953 void
 954 DWARFDebugInfoEntry::Dump
 955 (
 956     SymbolFileDWARF* dwarf2Data,
 957     const DWARFCompileUnit* cu,
 958     Stream &s,
 959     uint32_t recurse_depth
 960 ) const
 961 {
 962     const DataExtractor& debug_info_data = dwarf2Data->get_debug_info_data();
 963     lldb::offset_t offset = m_offset;
 964
 965     if (debug_info_data.ValidOffset(offset))
 966     {
 967         dw_uleb128_t abbrCode = debug_info_data.GetULEB128(&offset);
 968
 969         s.Printf("\n0x%8.8x: ", m_offset);
 970         s.Indent();
 971         if (abbrCode != m_abbr_idx)
 972         {
 973             s.Printf( "error: DWARF has been modified\n");
 974         }
 975         else if (abbrCode)
 976         {
 977             const DWARFAbbreviationDeclaration* abbrevDecl = cu->GetAbbreviations()->GetAbbreviationDeclaration (abbrCode);
 978
 979             if (abbrevDecl)
 980             {
 981                 s.PutCString(DW_TAG_value_to_name(abbrevDecl->Tag()));
 982                 s.Printf( " [%u] %c\n", abbrCode, abbrevDecl->HasChildren() ? '*':' ');
 983
 984                 // Dump all data in the .debug_info for the attributes
 985                 const uint32_t numAttributes = abbrevDecl->NumAttributes();
 986                 uint32_t i;
 987                 dw_attr_t attr;
 988                 dw_form_t form;
 989                 for (i=0; i<numAttributes; ++i)
 990                 {
 991                     abbrevDecl->GetAttrAndFormByIndexUnchecked(i, attr, form);
 992
 993                     DumpAttribute(dwarf2Data, cu, debug_info_data, &offset, s, attr, form);
 994                 }
 995
 996                 const DWARFDebugInfoEntry* child = GetFirstChild();
 997                 if (recurse_depth > 0 && child)
 998                 {
 999                     s.IndentMore();
1000
1001                     while (child)
1002                     {
1003                         child->Dump(dwarf2Data, cu, s, recurse_depth-1);
1004                         child = child->GetSibling();
1005                     }
1006                     s.IndentLess();
1007                 }
1008             }
1009             else
1010                 s.Printf( "Abbreviation code note found in 'debug_abbrev' class for code: %u\n", abbrCode);
1011         }
1012         else
1013         {
1014             s.Printf( "NULL\n");
1015         }
1016     }
1017 }
1018
1019 void
1020 DWARFDebugInfoEntry::DumpLocation
1021 (
1022     SymbolFileDWARF* dwarf2Data,
1023     DWARFCompileUnit* cu,
1024     Stream &s
1025 ) const
1026 {
1027     const DWARFDebugInfoEntry *cu_die = cu->GetCompileUnitDIEOnly();
1028     const char *cu_name = NULL;
1029     if (cu_die != NULL)
1030         cu_name = cu_die->GetName (dwarf2Data, cu);
1031     const char *obj_file_name = NULL;
1032     ObjectFile *obj_file = dwarf2Data->GetObjectFile();
1033     if (obj_file)
1034         obj_file_name = obj_file->GetFileSpec().GetFilename().AsCString();
1035     const char *die_name = GetName (dwarf2Data, cu);
1036     s.Printf ("0x%8.8x/0x%8.8x: %-30s (from %s in %s)",
1037               cu->GetOffset(),
1038               GetOffset(),
1039               die_name ? die_name : "",
1040               cu_name ? cu_name : "<NULL>",
1041               obj_file_name ? obj_file_name : "<NULL>");
1042 }
1043
1044 //----------------------------------------------------------------------
1045 // DumpAttribute
1046 //
1047 // Dumps a debug information entry attribute along with it's form. Any
1048 // special display of attributes is done (disassemble location lists,
1049 // show enumeration values for attributes, etc).
1050 //----------------------------------------------------------------------
1051 void
1052 DWARFDebugInfoEntry::DumpAttribute
1053 (
1054     SymbolFileDWARF* dwarf2Data,
1055     const DWARFCompileUnit* cu,
1056     const DataExtractor& debug_info_data,
1057     lldb::offset_t *offset_ptr,
1058     Stream &s,
1059     dw_attr_t attr,
1060     dw_form_t form
1061 )
1062 {
1063     bool verbose    = s.GetVerbose();
1064     bool show_form  = s.GetFlags().Test(DWARFDebugInfo::eDumpFlag_ShowForm);
1065
1066     const DataExtractor* debug_str_data = dwarf2Data ? &dwarf2Data->get_debug_str_data() : NULL;
1067     if (verbose)
1068         s.Offset (*offset_ptr);
1069     else
1070         s.Printf ("            ");
1071     s.Indent(DW_AT_value_to_name(attr));
1072
1073     if (show_form)
1074     {
1075         s.Printf( "[%s", DW_FORM_value_to_name(form));
1076     }
1077
1078     DWARFFormValue form_value(form);
1079
1080     if (!form_value.ExtractValue(debug_info_data, offset_ptr, cu))
1081         return;
1082
1083     if (show_form)
1084     {
1085         if (form == DW_FORM_indirect)
1086         {
1087             s.Printf( " [%s]", DW_FORM_value_to_name(form_value.Form()));
1088         }
1089
1090         s.PutCString("] ");
1091     }
1092
1093     s.PutCString("( ");
1094
1095     // Always dump form value if verbose is enabled
1096     if (verbose)
1097     {
1098         form_value.Dump(s, debug_str_data, cu);
1099     }
1100
1101
1102     // Check to see if we have any special attribute formatters
1103     switch (attr)
1104     {
1105     case DW_AT_stmt_list:
1106         if ( verbose ) s.PutCString(" ( ");
1107         s.Printf( "0x%8.8" PRIx64, form_value.Unsigned());
1108         if ( verbose ) s.PutCString(" )");
1109         break;
1110
1111     case DW_AT_language:
1112         if ( verbose ) s.PutCString(" ( ");
1113         s.PutCString(DW_LANG_value_to_name(form_value.Unsigned()));
1114         if ( verbose ) s.PutCString(" )");
1115         break;
1116
1117     case DW_AT_encoding:
1118         if ( verbose ) s.PutCString(" ( ");
1119         s.PutCString(DW_ATE_value_to_name(form_value.Unsigned()));
1120         if ( verbose ) s.PutCString(" )");
1121         break;
1122
1123     case DW_AT_frame_base:
1124     case DW_AT_location:
1125     case DW_AT_data_member_location:
1126         {
1127             const uint8_t* blockData = form_value.BlockData();
1128             if (blockData)
1129             {
1130                 if (!verbose)
1131                     form_value.Dump(s, debug_str_data, cu);
1132
1133                 // Location description is inlined in data in the form value
1134                 DataExtractor locationData(debug_info_data, (*offset_ptr) - form_value.Unsigned(), form_value.Unsigned());
1135                 if ( verbose ) s.PutCString(" ( ");
1136                 print_dwarf_expression (s, locationData, DWARFCompileUnit::GetAddressByteSize(cu), 4, false);
1137                 if ( verbose ) s.PutCString(" )");
1138             }
1139             else
1140             {
1141                 // We have a location list offset as the value that is
1142                 // the offset into the .debug_loc section that describes
1143                 // the value over it's lifetime
1144                 uint64_t debug_loc_offset = form_value.Unsigned();
1145                 if (dwarf2Data)
1146                 {
1147                     if ( !verbose )
1148                         form_value.Dump(s, debug_str_data, cu);
1149                     DWARFLocationList::Dump(s, cu, dwarf2Data->get_debug_loc_data(), debug_loc_offset);
1150                 }
1151                 else
1152                 {
1153                     if ( !verbose )
1154                         form_value.Dump(s, NULL, cu);
1155                 }
1156             }
1157         }
1158         break;
1159
1160     case DW_AT_abstract_origin:
1161     case DW_AT_specification:
1162         {
1163             uint64_t abstract_die_offset = form_value.Reference(cu);
1164             form_value.Dump(s, debug_str_data, cu);
1165         //  *ostrm_ptr << HEX32 << abstract_die_offset << " ( ";
1166             if ( verbose ) s.PutCString(" ( ");
1167             GetName(dwarf2Data, cu, abstract_die_offset, s);
1168             if ( verbose ) s.PutCString(" )");
1169         }
1170         break;
1171
1172     case DW_AT_type:
1173         {
1174             uint64_t type_die_offset = form_value.Reference(cu);
1175             if (!verbose)
1176                 form_value.Dump(s, debug_str_data, cu);
1177             s.PutCString(" ( ");
1178             AppendTypeName(dwarf2Data, cu, type_die_offset, s);
1179             s.PutCString(" )");
1180         }
1181         break;
1182
1183     case DW_AT_ranges:
1184         {
1185             if ( !verbose )
1186                 form_value.Dump(s, debug_str_data, cu);
1187             lldb::offset_t ranges_offset = form_value.Unsigned();
1188             dw_addr_t base_addr = cu ? cu->GetBaseAddress() : 0;
1189             if (dwarf2Data)
1190                 DWARFDebugRanges::Dump(s, dwarf2Data->get_debug_ranges_data(), &ranges_offset, base_addr);
1191         }
1192         break;
1193
1194     default:
1195         if ( !verbose )
1196             form_value.Dump(s, debug_str_data, cu);
1197         break;
1198     }
1199
1200     s.PutCString(" )\n");
1201 }
1202
1203 //----------------------------------------------------------------------
1204 // Get all attribute values for a given DIE, including following any
1205 // specification or abstract origin attributes and including those in
1206 // the results. Any duplicate attributes will have the first instance
1207 // take precedence (this can happen for declaration attributes).
1208 //----------------------------------------------------------------------
1209 size_t
1210 DWARFDebugInfoEntry::GetAttributes
1211 (
1212     SymbolFileDWARF* dwarf2Data,
1213     const DWARFCompileUnit* cu,
1214     const uint8_t *fixed_form_sizes,
1215     DWARFDebugInfoEntry::Attributes& attributes,
1216     uint32_t curr_depth
1217 ) const
1218 {
1219     lldb::offset_t offset;
1220     const DWARFAbbreviationDeclaration* abbrevDecl = GetAbbreviationDeclarationPtr(dwarf2Data, cu, offset);
1221
1222     if (abbrevDecl)
1223     {
1224         const DataExtractor& debug_info_data = dwarf2Data->get_debug_info_data();
1225
1226         if (fixed_form_sizes == NULL)
1227             fixed_form_sizes = DWARFFormValue::GetFixedFormSizesForAddressSize(cu->GetAddressByteSize());
1228
1229         const uint32_t num_attributes = abbrevDecl->NumAttributes();
1230         uint32_t i;
1231         dw_attr_t attr;
1232         dw_form_t form;
1233         DWARFFormValue form_value;
1234         for (i=0; i<num_attributes; ++i)
1235         {
1236             abbrevDecl->GetAttrAndFormByIndexUnchecked (i, attr, form);
1237
1238             // If we are tracking down DW_AT_specification or DW_AT_abstract_origin
1239             // attributes, the depth will be non-zero. We need to omit certain
1240             // attributes that don't make sense.
1241             switch (attr)
1242             {
1243             case DW_AT_sibling:
1244             case DW_AT_declaration:
1245                 if (curr_depth > 0)
1246                 {
1247                     // This attribute doesn't make sense when combined with
1248                     // the DIE that references this DIE. We know a DIE is
1249                     // referencing this DIE because curr_depth is not zero
1250                     break;
1251                 }
1252                 // Fall through...
1253             default:
1254                 attributes.Append(cu, offset, attr, form);
1255                 break;
1256             }
1257
1258             if ((attr == DW_AT_specification) || (attr == DW_AT_abstract_origin))
1259             {
1260                 form_value.SetForm(form);
1261                 if (form_value.ExtractValue(debug_info_data, &offset, cu))
1262                 {
1263                     const DWARFDebugInfoEntry* die = NULL;
1264                     dw_offset_t die_offset = form_value.Reference(cu);
1265                     if (cu->ContainsDIEOffset(die_offset))
1266                     {
1267                         die = const_cast<DWARFCompileUnit*>(cu)->GetDIEPtr(die_offset);
1268                         if (die)
1269                             die->GetAttributes(dwarf2Data, cu, fixed_form_sizes, attributes, curr_depth + 1);
1270                     }
1271                     else
1272                     {
1273                         DWARFCompileUnitSP cu_sp_ptr;
1274                         die = const_cast<SymbolFileDWARF*>(dwarf2Data)->DebugInfo()->GetDIEPtr(die_offset, &cu_sp_ptr);
1275                         if (die)
1276                             die->GetAttributes(dwarf2Data, cu_sp_ptr.get(), fixed_form_sizes, attributes, curr_depth + 1);
1277                     }
1278                 }
1279             }
1280             else
1281             {
1282                 const uint8_t fixed_skip_size = fixed_form_sizes [form];
1283                 if (fixed_skip_size)
1284                     offset += fixed_skip_size;
1285                 else
1286                     DWARFFormValue::SkipValue(form, debug_info_data, &offset, cu);
1287             }
1288         }
1289     }
1290     else
1291     {
1292         attributes.Clear();
1293     }
1294     return attributes.Size();
1295
1296 }
1297
1298 //----------------------------------------------------------------------
1299 // GetAttributeValue
1300 //
1301 // Get the value of an attribute and return the .debug_info offset of the
1302 // attribute if it was properly extracted into form_value, or zero
1303 // if we fail since an offset of zero is invalid for an attribute (it
1304 // would be a compile unit header).
1305 //----------------------------------------------------------------------
1306 dw_offset_t
1307 DWARFDebugInfoEntry::GetAttributeValue
1308 (
1309     SymbolFileDWARF* dwarf2Data,
1310     const DWARFCompileUnit* cu,
1311     const dw_attr_t attr,
1312     DWARFFormValue& form_value,
1313     dw_offset_t* end_attr_offset_ptr
1314 ) const
1315 {
1316     lldb::offset_t offset;
1317     const DWARFAbbreviationDeclaration* abbrevDecl = GetAbbreviationDeclarationPtr(dwarf2Data, cu, offset);
1318
1319     if (abbrevDecl)
1320     {
1321         uint32_t attr_idx = abbrevDecl->FindAttributeIndex(attr);
1322
1323         if (attr_idx != DW_INVALID_INDEX)
1324         {
1325             const DataExtractor& debug_info_data = dwarf2Data->get_debug_info_data();
1326
1327             uint32_t idx=0;
1328             while (idx<attr_idx)
1329                 DWARFFormValue::SkipValue(abbrevDecl->GetFormByIndex(idx++), debug_info_data, &offset, cu);
1330
1331             const dw_offset_t attr_offset = offset;
1332             form_value.SetForm(abbrevDecl->GetFormByIndex(idx));
1333             if (form_value.ExtractValue(debug_info_data, &offset, cu))
1334             {
1335                 if (end_attr_offset_ptr)
1336                     *end_attr_offset_ptr = offset;
1337                 return attr_offset;
1338             }
1339         }
1340     }
1341
1342     return 0;
1343 }
1344
1345 //----------------------------------------------------------------------
1346 // GetAttributeValueAsString
1347 //
1348 // Get the value of an attribute as a string return it. The resulting
1349 // pointer to the string data exists within the supplied SymbolFileDWARF
1350 // and will only be available as long as the SymbolFileDWARF is still around
1351 // and it's content doesn't change.
1352 //----------------------------------------------------------------------
1353 const char*
1354 DWARFDebugInfoEntry::GetAttributeValueAsString
1355 (
1356     SymbolFileDWARF* dwarf2Data,
1357     const DWARFCompileUnit* cu,
1358     const dw_attr_t attr,
1359     const char* fail_value) const
1360 {
1361     DWARFFormValue form_value;
1362     if (GetAttributeValue(dwarf2Data, cu, attr, form_value))
1363         return form_value.AsCString(&dwarf2Data->get_debug_str_data());
1364     return fail_value;
1365 }
1366
1367 //----------------------------------------------------------------------
1368 // GetAttributeValueAsUnsigned
1369 //
1370 // Get the value of an attribute as unsigned and return it.
1371 //----------------------------------------------------------------------
1372 uint64_t
1373 DWARFDebugInfoEntry::GetAttributeValueAsUnsigned
1374 (
1375     SymbolFileDWARF* dwarf2Data,
1376     const DWARFCompileUnit* cu,
1377     const dw_attr_t attr,
1378     uint64_t fail_value
1379 ) const
1380 {
1381     DWARFFormValue form_value;
1382     if (GetAttributeValue(dwarf2Data, cu, attr, form_value))
1383         return form_value.Unsigned();
1384     return fail_value;
1385 }
1386
1387 //----------------------------------------------------------------------
1388 // GetAttributeValueAsSigned
1389 //
1390 // Get the value of an attribute a signed value and return it.
1391 //----------------------------------------------------------------------
1392 int64_t
1393 DWARFDebugInfoEntry::GetAttributeValueAsSigned
1394 (
1395     SymbolFileDWARF* dwarf2Data,
1396     const DWARFCompileUnit* cu,
1397     const dw_attr_t attr,
1398     int64_t fail_value
1399 ) const
1400 {
1401     DWARFFormValue form_value;
1402     if (GetAttributeValue(dwarf2Data, cu, attr, form_value))
1403         return form_value.Signed();
1404     return fail_value;
1405 }
1406
1407 //----------------------------------------------------------------------
1408 // GetAttributeValueAsReference
1409 //
1410 // Get the value of an attribute as reference and fix up and compile
1411 // unit relative offsets as needed.
1412 //----------------------------------------------------------------------
1413 uint64_t
1414 DWARFDebugInfoEntry::GetAttributeValueAsReference
1415 (
1416     SymbolFileDWARF* dwarf2Data,
1417     const DWARFCompileUnit* cu,
1418     const dw_attr_t attr,
1419     uint64_t fail_value
1420 ) const
1421 {
1422     DWARFFormValue form_value;
1423     if (GetAttributeValue(dwarf2Data, cu, attr, form_value))
1424         return form_value.Reference(cu);
1425     return fail_value;
1426 }
1427
1428 //----------------------------------------------------------------------
1429 // GetAttributeHighPC
1430 //
1431 // Get the hi_pc, adding hi_pc to lo_pc when specified
1432 // as an <offset-from-low-pc>.
1433 //
1434 // Returns the hi_pc or fail_value.
1435 //----------------------------------------------------------------------
1436 dw_addr_t
1437 DWARFDebugInfoEntry::GetAttributeHighPC
1438 (
1439     SymbolFileDWARF* dwarf2Data,
1440     const DWARFCompileUnit* cu,
1441     dw_addr_t lo_pc,
1442     uint64_t fail_value
1443 ) const
1444 {
1445     DWARFFormValue form_value;
1446
1447     if (GetAttributeValue(dwarf2Data, cu, DW_AT_high_pc, form_value))
1448     {
1449         dw_addr_t hi_pc = form_value.Unsigned();
1450         if (form_value.Form() != DW_FORM_addr)
1451             hi_pc += lo_pc; // DWARF4 can specify the hi_pc as an <offset-from-lowpc>
1452         return hi_pc;
1453     }
1454     return fail_value;
1455 }
1456
1457 //----------------------------------------------------------------------
1458 // GetAttributeAddressRange
1459 //
1460 // Get the lo_pc and hi_pc, adding hi_pc to lo_pc when specified
1461 // as an <offset-from-low-pc>.
1462 //
1463 // Returns true or sets lo_pc and hi_pc to fail_value.
1464 //----------------------------------------------------------------------
1465 bool
1466 DWARFDebugInfoEntry::GetAttributeAddressRange
1467 (
1468     SymbolFileDWARF* dwarf2Data,
1469     const DWARFCompileUnit* cu,
1470     dw_addr_t& lo_pc,
1471     dw_addr_t& hi_pc,
1472     uint64_t fail_value
1473 ) const
1474 {
1475     lo_pc = GetAttributeValueAsUnsigned(dwarf2Data, cu, DW_AT_low_pc, fail_value);
1476     if (lo_pc != fail_value)
1477     {
1478         hi_pc = GetAttributeHighPC(dwarf2Data, cu, lo_pc, fail_value);
1479         if (hi_pc != fail_value)
1480           return true;
1481     }
1482     lo_pc = fail_value;
1483     hi_pc = fail_value;
1484     return false;
1485 }
1486 //----------------------------------------------------------------------
1487 // GetAttributeValueAsLocation
1488 //
1489 // Get the value of an attribute as reference and fix up and compile
1490 // unit relative offsets as needed.
1491 //----------------------------------------------------------------------
1492 dw_offset_t
1493 DWARFDebugInfoEntry::GetAttributeValueAsLocation
1494 (
1495     SymbolFileDWARF* dwarf2Data,
1496     const DWARFCompileUnit* cu,
1497     const dw_attr_t attr,
1498     DataExtractor& location_data,
1499     uint32_t &block_size
1500 ) const
1501 {
1502     block_size = 0;
1503     DWARFFormValue form_value;
1504
1505     // Empty out data in case we don't find anything
1506     location_data.Clear();
1507     dw_offset_t end_addr_offset = DW_INVALID_OFFSET;
1508     const dw_offset_t attr_offset = GetAttributeValue(dwarf2Data, cu, attr, form_value, &end_addr_offset);
1509     if (attr_offset)
1510     {
1511         const uint8_t* blockData = form_value.BlockData();
1512         if (blockData)
1513         {
1514             // We have an inlined location list in the .debug_info section
1515             const DataExtractor& debug_info = dwarf2Data->get_debug_info_data();
1516             dw_offset_t block_offset = blockData - debug_info.GetDataStart();
1517             block_size = (end_addr_offset - attr_offset) - form_value.Unsigned();
1518             location_data.SetData(debug_info, block_offset, block_size);
1519         }
1520         else
1521         {
1522             // We have a location list offset as the value that is
1523             // the offset into the .debug_loc section that describes
1524             // the value over it's lifetime
1525             lldb::offset_t debug_loc_offset = form_value.Unsigned();
1526             if (dwarf2Data)
1527             {
1528                 assert(dwarf2Data->get_debug_loc_data().GetAddressByteSize() == cu->GetAddressByteSize());
1529                 return DWARFLocationList::Extract(dwarf2Data->get_debug_loc_data(), &debug_loc_offset, location_data);
1530             }
1531         }
1532     }
1533     return attr_offset;
1534 }
1535
1536 //----------------------------------------------------------------------
1537 // GetName
1538 //
1539 // Get value of the DW_AT_name attribute and return it if one exists,
1540 // else return NULL.
1541 //----------------------------------------------------------------------
1542 const char*
1543 DWARFDebugInfoEntry::GetName
1544 (
1545     SymbolFileDWARF* dwarf2Data,
1546     const DWARFCompileUnit* cu
1547 ) const
1548 {
1549     DWARFFormValue form_value;
1550     if (GetAttributeValue(dwarf2Data, cu, DW_AT_name, form_value))
1551         return form_value.AsCString(&dwarf2Data->get_debug_str_data());
1552     else
1553     {
1554         if (GetAttributeValue(dwarf2Data, cu, DW_AT_specification, form_value))
1555         {
1556             DWARFCompileUnitSP cu_sp_ptr;
1557             const DWARFDebugInfoEntry* die = const_cast<SymbolFileDWARF*>(dwarf2Data)->DebugInfo()->GetDIEPtr(form_value.Reference(cu), &cu_sp_ptr);
1558             if (die)
1559                 return die->GetName(dwarf2Data, cu_sp_ptr.get());
1560         }
1561     }
1562     return NULL;
1563 }
1564
1565
1566 //----------------------------------------------------------------------
1567 // GetMangledName
1568 //
1569 // Get value of the DW_AT_MIPS_linkage_name attribute and return it if
1570 // one exists, else return the value of the DW_AT_name attribute
1571 //----------------------------------------------------------------------
1572 const char*
1573 DWARFDebugInfoEntry::GetMangledName
1574 (
1575     SymbolFileDWARF* dwarf2Data,
1576     const DWARFCompileUnit* cu,
1577     bool substitute_name_allowed
1578 ) const
1579 {
1580     const char* name = NULL;
1581     DWARFFormValue form_value;
1582
1583     if (GetAttributeValue(dwarf2Data, cu, DW_AT_MIPS_linkage_name, form_value))
1584         name = form_value.AsCString(&dwarf2Data->get_debug_str_data());
1585
1586     if (GetAttributeValue(dwarf2Data, cu, DW_AT_linkage_name, form_value))
1587         name = form_value.AsCString(&dwarf2Data->get_debug_str_data());
1588
1589     if (substitute_name_allowed && name == NULL)
1590     {
1591         if (GetAttributeValue(dwarf2Data, cu, DW_AT_name, form_value))
1592             name = form_value.AsCString(&dwarf2Data->get_debug_str_data());
1593     }
1594     return name;
1595 }
1596
1597
1598 //----------------------------------------------------------------------
1599 // GetPubname
1600 //
1601 // Get value the name for a DIE as it should appear for a
1602 // .debug_pubnames or .debug_pubtypes section.
1603 //----------------------------------------------------------------------
1604 const char*
1605 DWARFDebugInfoEntry::GetPubname
1606 (
1607     SymbolFileDWARF* dwarf2Data,
1608     const DWARFCompileUnit* cu
1609 ) const
1610 {
1611     const char* name = NULL;
1612     if (!dwarf2Data)
1613         return name;
1614
1615     DWARFFormValue form_value;
1616
1617     if (GetAttributeValue(dwarf2Data, cu, DW_AT_MIPS_linkage_name, form_value))
1618         name = form_value.AsCString(&dwarf2Data->get_debug_str_data());
1619     else if (GetAttributeValue(dwarf2Data, cu, DW_AT_linkage_name, form_value))
1620         name = form_value.AsCString(&dwarf2Data->get_debug_str_data());
1621     else if (GetAttributeValue(dwarf2Data, cu, DW_AT_name, form_value))
1622         name = form_value.AsCString(&dwarf2Data->get_debug_str_data());
1623     else if (GetAttributeValue(dwarf2Data, cu, DW_AT_specification, form_value))
1624     {
1625         // The specification DIE may be in another compile unit so we need
1626         // to get a die and its compile unit.
1627         DWARFCompileUnitSP cu_sp_ptr;
1628         const DWARFDebugInfoEntry* die = const_cast<SymbolFileDWARF*>(dwarf2Data)->DebugInfo()->GetDIEPtr(form_value.Reference(cu), &cu_sp_ptr);
1629         if (die)
1630             return die->GetPubname(dwarf2Data, cu_sp_ptr.get());
1631     }
1632     return name;
1633 }
1634
1635
1636 //----------------------------------------------------------------------
1637 // GetName
1638 //
1639 // Get value of the DW_AT_name attribute for a debug information entry
1640 // that exists at offset "die_offset" and place that value into the
1641 // supplied stream object. If the DIE is a NULL object "NULL" is placed
1642 // into the stream, and if no DW_AT_name attribute exists for the DIE
1643 // then nothing is printed.
1644 //----------------------------------------------------------------------
1645 bool
1646 DWARFDebugInfoEntry::GetName
1647 (
1648     SymbolFileDWARF* dwarf2Data,
1649     const DWARFCompileUnit* cu,
1650     const dw_offset_t die_offset,
1651     Stream &s
1652 )
1653 {
1654     if (dwarf2Data == NULL)
1655     {
1656         s.PutCString("NULL");
1657         return false;
1658     }
1659
1660     DWARFDebugInfoEntry die;
1661     lldb::offset_t offset = die_offset;
1662     if (die.Extract(dwarf2Data, cu, &offset))
1663     {
1664         if (die.IsNULL())
1665         {
1666             s.PutCString("NULL");
1667             return true;
1668         }
1669         else
1670         {
1671             DWARFFormValue form_value;
1672             if (die.GetAttributeValue(dwarf2Data, cu, DW_AT_name, form_value))
1673             {
1674                 const char* name = form_value.AsCString(&dwarf2Data->get_debug_str_data());
1675                 if (name)
1676                 {
1677                     s.PutCString(name);
1678                     return true;
1679                 }
1680             }
1681         }
1682     }
1683     return false;
1684 }
1685
1686 //----------------------------------------------------------------------
1687 // AppendTypeName
1688 //
1689 // Follows the type name definition down through all needed tags to
1690 // end up with a fully qualified type name and dump the results to
1691 // the supplied stream. This is used to show the name of types given
1692 // a type identifier.
1693 //----------------------------------------------------------------------
1694 bool
1695 DWARFDebugInfoEntry::AppendTypeName
1696 (
1697     SymbolFileDWARF* dwarf2Data,
1698     const DWARFCompileUnit* cu,
1699     const dw_offset_t die_offset,
1700     Stream &s
1701 )
1702 {
1703     if (dwarf2Data == NULL)
1704     {
1705         s.PutCString("NULL");
1706         return false;
1707     }
1708
1709     DWARFDebugInfoEntry die;
1710     lldb::offset_t offset = die_offset;
1711     if (die.Extract(dwarf2Data, cu, &offset))
1712     {
1713         if (die.IsNULL())
1714         {
1715             s.PutCString("NULL");
1716             return true;
1717         }
1718         else
1719         {
1720             const char* name = die.GetPubname(dwarf2Data, cu);
1721         //  if (die.GetAttributeValue(dwarf2Data, cu, DW_AT_name, form_value))
1722         //      name = form_value.AsCString(&dwarf2Data->get_debug_str_data());
1723             if (name)
1724                 s.PutCString(name);
1725             else
1726             {
1727                 bool result = true;
1728                 const DWARFAbbreviationDeclaration* abbrevDecl = die.GetAbbreviationDeclarationPtr(dwarf2Data, cu, offset);
1729
1730                 if (abbrevDecl == NULL)
1731                     return false;
1732
1733                 switch (abbrevDecl->Tag())
1734                 {
1735                 case DW_TAG_array_type:         break;  // print out a "[]" after printing the full type of the element below
1736                 case DW_TAG_base_type:          s.PutCString("base ");         break;
1737                 case DW_TAG_class_type:         s.PutCString("class ");            break;
1738                 case DW_TAG_const_type:         s.PutCString("const ");            break;
1739                 case DW_TAG_enumeration_type:   s.PutCString("enum ");         break;
1740                 case DW_TAG_file_type:          s.PutCString("file ");         break;
1741                 case DW_TAG_interface_type:     s.PutCString("interface ");        break;
1742                 case DW_TAG_packed_type:        s.PutCString("packed ");       break;
1743                 case DW_TAG_pointer_type:       break;  // print out a '*' after printing the full type below
1744                 case DW_TAG_ptr_to_member_type: break;  // print out a '*' after printing the full type below
1745                 case DW_TAG_reference_type:     break;  // print out a '&' after printing the full type below
1746                 case DW_TAG_restrict_type:      s.PutCString("restrict ");     break;
1747                 case DW_TAG_set_type:           s.PutCString("set ");          break;
1748                 case DW_TAG_shared_type:        s.PutCString("shared ");       break;
1749                 case DW_TAG_string_type:        s.PutCString("string ");       break;
1750                 case DW_TAG_structure_type:     s.PutCString("struct ");       break;
1751                 case DW_TAG_subrange_type:      s.PutCString("subrange ");     break;
1752                 case DW_TAG_subroutine_type:    s.PutCString("function ");     break;
1753                 case DW_TAG_thrown_type:        s.PutCString("thrown ");       break;
1754                 case DW_TAG_union_type:         s.PutCString("union ");            break;
1755                 case DW_TAG_unspecified_type:   s.PutCString("unspecified ");  break;
1756                 case DW_TAG_volatile_type:      s.PutCString("volatile ");     break;
1757                 default:
1758                     return false;
1759                 }
1760
1761                 // Follow the DW_AT_type if possible
1762                 DWARFFormValue form_value;
1763                 if (die.GetAttributeValue(dwarf2Data, cu, DW_AT_type, form_value))
1764                 {
1765                     uint64_t next_die_offset = form_value.Reference(cu);
1766                     result = AppendTypeName(dwarf2Data, cu, next_die_offset, s);
1767                 }
1768
1769                 switch (abbrevDecl->Tag())
1770                 {
1771                 case DW_TAG_array_type:         s.PutCString("[]");    break;
1772                 case DW_TAG_pointer_type:       s.PutChar('*');    break;
1773                 case DW_TAG_ptr_to_member_type: s.PutChar('*');    break;
1774                 case DW_TAG_reference_type:     s.PutChar('&');    break;
1775                 default:
1776                     break;
1777                 }
1778                 return result;
1779             }
1780         }
1781     }
1782     return false;
1783 }
1784
1785 bool
1786 DWARFDebugInfoEntry::Contains (const DWARFDebugInfoEntry *die) const
1787 {
1788     if (die)
1789     {
1790         const dw_offset_t die_offset = die->GetOffset();
1791         if (die_offset > GetOffset())
1792         {
1793             const DWARFDebugInfoEntry *sibling = GetSibling();
1794             assert (sibling); // TODO: take this out
1795             if (sibling)
1796                 return die_offset < sibling->GetOffset();
1797         }
1798     }
1799     return false;
1800 }
1801
1802 //----------------------------------------------------------------------
1803 // BuildAddressRangeTable
1804 //----------------------------------------------------------------------
1805 void
1806 DWARFDebugInfoEntry::BuildAddressRangeTable
1807 (
1808     SymbolFileDWARF* dwarf2Data,
1809     const DWARFCompileUnit* cu,
1810     DWARFDebugAranges* debug_aranges
1811 ) const
1812 {
1813     if (m_tag)
1814     {
1815         if (m_tag == DW_TAG_subprogram)
1816         {
1817             dw_addr_t lo_pc = LLDB_INVALID_ADDRESS;
1818             dw_addr_t hi_pc = LLDB_INVALID_ADDRESS;
1819             if (GetAttributeAddressRange(dwarf2Data, cu, lo_pc, hi_pc, LLDB_INVALID_ADDRESS))
1820             {
1821                 /// 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);
1822                 debug_aranges->AppendRange (cu->GetOffset(), lo_pc, hi_pc);
1823             }
1824         }
1825
1826
1827         const DWARFDebugInfoEntry* child = GetFirstChild();
1828         while (child)
1829         {
1830             child->BuildAddressRangeTable(dwarf2Data, cu, debug_aranges);
1831             child = child->GetSibling();
1832         }
1833     }
1834 }
1835
1836 //----------------------------------------------------------------------
1837 // BuildFunctionAddressRangeTable
1838 //
1839 // This function is very similar to the BuildAddressRangeTable function
1840 // except that the actual DIE offset for the function is placed in the
1841 // table instead of the compile unit offset (which is the way the
1842 // standard .debug_aranges section does it).
1843 //----------------------------------------------------------------------
1844 void
1845 DWARFDebugInfoEntry::BuildFunctionAddressRangeTable
1846 (
1847     SymbolFileDWARF* dwarf2Data,
1848     const DWARFCompileUnit* cu,
1849     DWARFDebugAranges* debug_aranges
1850 ) const
1851 {
1852     if (m_tag)
1853     {
1854         if (m_tag == DW_TAG_subprogram)
1855         {
1856             dw_addr_t lo_pc = LLDB_INVALID_ADDRESS;
1857             dw_addr_t hi_pc = LLDB_INVALID_ADDRESS;
1858             if (GetAttributeAddressRange(dwarf2Data, cu, lo_pc, hi_pc, LLDB_INVALID_ADDRESS))
1859             {
1860             //  printf("BuildAddressRangeTable() 0x%8.8x: [0x%16.16" PRIx64 " - 0x%16.16" PRIx64 ")\n", m_offset, lo_pc, hi_pc); // DEBUG ONLY
1861                 debug_aranges->AppendRange (GetOffset(), lo_pc, hi_pc);
1862             }
1863         }
1864
1865         const DWARFDebugInfoEntry* child = GetFirstChild();
1866         while (child)
1867         {
1868             child->BuildFunctionAddressRangeTable(dwarf2Data, cu, debug_aranges);
1869             child = child->GetSibling();
1870         }
1871     }
1872 }
1873
1874 void
1875 DWARFDebugInfoEntry::GetDeclContextDIEs (SymbolFileDWARF* dwarf2Data,
1876                                          DWARFCompileUnit* cu,
1877                                          DWARFDIECollection &decl_context_dies) const
1878 {
1879     const DWARFDebugInfoEntry *parent_decl_ctx_die = GetParentDeclContextDIE (dwarf2Data, cu);
1880     if (parent_decl_ctx_die && parent_decl_ctx_die != this)
1881     {
1882         decl_context_dies.Append(parent_decl_ctx_die);
1883         parent_decl_ctx_die->GetDeclContextDIEs (dwarf2Data, cu, decl_context_dies);
1884     }
1885 }
1886
1887 void
1888 DWARFDebugInfoEntry::GetDWARFDeclContext (SymbolFileDWARF* dwarf2Data,
1889                                           DWARFCompileUnit* cu,
1890                                           DWARFDeclContext &dwarf_decl_ctx) const
1891 {
1892     const dw_tag_t tag = Tag();
1893     if (tag != DW_TAG_compile_unit)
1894     {
1895         dwarf_decl_ctx.AppendDeclContext(tag, GetName(dwarf2Data, cu));
1896         const DWARFDebugInfoEntry *parent_decl_ctx_die = GetParentDeclContextDIE (dwarf2Data, cu);
1897         if (parent_decl_ctx_die && parent_decl_ctx_die != this)
1898         {
1899             if (parent_decl_ctx_die->Tag() != DW_TAG_compile_unit)
1900                 parent_decl_ctx_die->GetDWARFDeclContext (dwarf2Data, cu, dwarf_decl_ctx);
1901         }
1902     }
1903 }
1904
1905
1906 bool
1907 DWARFDebugInfoEntry::MatchesDWARFDeclContext (SymbolFileDWARF* dwarf2Data,
1908                                               DWARFCompileUnit* cu,
1909                                               const DWARFDeclContext &dwarf_decl_ctx) const
1910 {
1911
1912     DWARFDeclContext this_dwarf_decl_ctx;
1913     GetDWARFDeclContext (dwarf2Data, cu, this_dwarf_decl_ctx);
1914     return this_dwarf_decl_ctx == dwarf_decl_ctx;
1915 }
1916
1917 const DWARFDebugInfoEntry *
1918 DWARFDebugInfoEntry::GetParentDeclContextDIE (SymbolFileDWARF* dwarf2Data,
1919                                                                                           DWARFCompileUnit* cu) const
1920 {
1921         DWARFDebugInfoEntry::Attributes attributes;
1922         GetAttributes(dwarf2Data, cu, NULL, attributes);
1923         return GetParentDeclContextDIE (dwarf2Data, cu, attributes);
1924 }
1925
1926 const DWARFDebugInfoEntry *
1927 DWARFDebugInfoEntry::GetParentDeclContextDIE (SymbolFileDWARF* dwarf2Data,
1928                                                                                           DWARFCompileUnit* cu,
1929                                                                                           const DWARFDebugInfoEntry::Attributes& attributes) const
1930 {
1931         const DWARFDebugInfoEntry * die = this;
1932
1933         while (die != NULL)
1934         {
1935                 // If this is the original DIE that we are searching for a declaration
1936                 // for, then don't look in the cache as we don't want our own decl
1937                 // context to be our decl context...
1938                 if (die != this)
1939                 {
1940                         switch (die->Tag())
1941                         {
1942                                 case DW_TAG_compile_unit:
1943                                 case DW_TAG_namespace:
1944                                 case DW_TAG_structure_type:
1945                                 case DW_TAG_union_type:
1946                                 case DW_TAG_class_type:
1947                                         return die;
1948
1949                                 default:
1950                                         break;
1951                         }
1952                 }
1953
1954                 dw_offset_t die_offset;
1955
1956                 die_offset = attributes.FormValueAsUnsigned(dwarf2Data, DW_AT_specification, DW_INVALID_OFFSET);
1957                 if (die_offset != DW_INVALID_OFFSET)
1958                 {
1959                         const DWARFDebugInfoEntry *spec_die = cu->GetDIEPtr (die_offset);
1960                         if (spec_die)
1961                         {
1962                                 const DWARFDebugInfoEntry *spec_die_decl_ctx_die = spec_die->GetParentDeclContextDIE (dwarf2Data, cu);
1963                                 if (spec_die_decl_ctx_die)
1964                                         return spec_die_decl_ctx_die;
1965                         }
1966                 }
1967
1968         die_offset = attributes.FormValueAsUnsigned(dwarf2Data, DW_AT_abstract_origin, DW_INVALID_OFFSET);
1969                 if (die_offset != DW_INVALID_OFFSET)
1970                 {
1971                         const DWARFDebugInfoEntry *abs_die = cu->GetDIEPtr (die_offset);
1972                         if (abs_die)
1973                         {
1974                                 const DWARFDebugInfoEntry *abs_die_decl_ctx_die = abs_die->GetParentDeclContextDIE (dwarf2Data, cu);
1975                                 if (abs_die_decl_ctx_die)
1976                                         return abs_die_decl_ctx_die;
1977                         }
1978                 }
1979
1980                 die = die->GetParent();
1981         }
1982     return NULL;
1983 }
1984
1985
1986 const char *
1987 DWARFDebugInfoEntry::GetQualifiedName (SymbolFileDWARF* dwarf2Data,
1988                                                                            DWARFCompileUnit* cu,
1989                                                                            std::string &storage) const
1990 {
1991         DWARFDebugInfoEntry::Attributes attributes;
1992         GetAttributes(dwarf2Data, cu, NULL, attributes);
1993         return GetQualifiedName (dwarf2Data, cu, attributes, storage);
1994 }
1995
1996 const char*
1997 DWARFDebugInfoEntry::GetQualifiedName (SymbolFileDWARF* dwarf2Data,
1998                                                                            DWARFCompileUnit* cu,
1999                                                                            const DWARFDebugInfoEntry::Attributes& attributes,
2000                                                                            std::string &storage) const
2001 {
2002
2003         const char *name = GetName (dwarf2Data, cu);
2004
2005         if (name)
2006         {
2007                 const DWARFDebugInfoEntry *parent_decl_ctx_die = GetParentDeclContextDIE (dwarf2Data, cu);
2008                 storage.clear();
2009                 // TODO: change this to get the correct decl context parent....
2010                 while (parent_decl_ctx_die)
2011                 {
2012                         const dw_tag_t parent_tag = parent_decl_ctx_die->Tag();
2013                         switch (parent_tag)
2014                         {
2015                 case DW_TAG_namespace:
2016                                 {
2017                                         const char *namespace_name = parent_decl_ctx_die->GetName (dwarf2Data, cu);
2018                                         if (namespace_name)
2019                                         {
2020                                                 storage.insert (0, "::");
2021                                                 storage.insert (0, namespace_name);
2022                                         }
2023                                         else
2024                                         {
2025                                                 storage.insert (0, "(anonymous namespace)::");
2026                                         }
2027                                         parent_decl_ctx_die = parent_decl_ctx_die->GetParentDeclContextDIE(dwarf2Data, cu);
2028                                 }
2029                     break;
2030
2031                 case DW_TAG_class_type:
2032                 case DW_TAG_structure_type:
2033                 case DW_TAG_union_type:
2034                                 {
2035                                         const char *class_union_struct_name = parent_decl_ctx_die->GetName (dwarf2Data, cu);
2036
2037                                         if (class_union_struct_name)
2038                                         {
2039                                                 storage.insert (0, "::");
2040                                                 storage.insert (0, class_union_struct_name);
2041                                         }
2042                                         parent_decl_ctx_die = parent_decl_ctx_die->GetParentDeclContextDIE(dwarf2Data, cu);
2043                                 }
2044                     break;
2045
2046                 default:
2047                     parent_decl_ctx_die = NULL;
2048                     break;
2049                         }
2050                 }
2051
2052                 if (storage.empty())
2053                         storage.append ("::");
2054
2055                 storage.append (name);
2056         }
2057         if (storage.empty())
2058                 return NULL;
2059         return storage.c_str();
2060 }
2061
2062
2063 //----------------------------------------------------------------------
2064 // LookupAddress
2065 //----------------------------------------------------------------------
2066 bool
2067 DWARFDebugInfoEntry::LookupAddress
2068 (
2069     const dw_addr_t address,
2070     SymbolFileDWARF* dwarf2Data,
2071     const DWARFCompileUnit* cu,
2072     DWARFDebugInfoEntry** function_die,
2073     DWARFDebugInfoEntry** block_die
2074 )
2075 {
2076     bool found_address = false;
2077     if (m_tag)
2078     {
2079         bool check_children = false;
2080         bool match_addr_range = false;
2081     //  printf("0x%8.8x: %30s: address = 0x%8.8x - ", m_offset, DW_TAG_value_to_name(tag), address);
2082         switch (m_tag)
2083         {
2084         case DW_TAG_array_type                 : break;
2085         case DW_TAG_class_type                 : check_children = true; break;
2086         case DW_TAG_entry_point                : break;
2087         case DW_TAG_enumeration_type           : break;
2088         case DW_TAG_formal_parameter           : break;
2089         case DW_TAG_imported_declaration       : break;
2090         case DW_TAG_label                      : break;
2091         case DW_TAG_lexical_block              : check_children = true; match_addr_range = true; break;
2092         case DW_TAG_member                     : break;
2093         case DW_TAG_pointer_type               : break;
2094         case DW_TAG_reference_type             : break;
2095         case DW_TAG_compile_unit               : match_addr_range = true; break;
2096         case DW_TAG_string_type                : break;
2097         case DW_TAG_structure_type             : check_children = true; break;
2098         case DW_TAG_subroutine_type            : break;
2099         case DW_TAG_typedef                    : break;
2100         case DW_TAG_union_type                 : break;
2101         case DW_TAG_unspecified_parameters     : break;
2102         case DW_TAG_variant                    : break;
2103         case DW_TAG_common_block               : check_children = true; break;
2104         case DW_TAG_common_inclusion           : break;
2105         case DW_TAG_inheritance                : break;
2106         case DW_TAG_inlined_subroutine         : check_children = true; match_addr_range = true; break;
2107         case DW_TAG_module                     : match_addr_range = true; break;
2108         case DW_TAG_ptr_to_member_type         : break;
2109         case DW_TAG_set_type                   : break;
2110         case DW_TAG_subrange_type              : break;
2111         case DW_TAG_with_stmt                  : break;
2112         case DW_TAG_access_declaration         : break;
2113         case DW_TAG_base_type                  : break;
2114         case DW_TAG_catch_block                : match_addr_range = true; break;
2115         case DW_TAG_const_type                 : break;
2116         case DW_TAG_constant                   : break;
2117         case DW_TAG_enumerator                 : break;
2118         case DW_TAG_file_type                  : break;
2119         case DW_TAG_friend                     : break;
2120         case DW_TAG_namelist                   : break;
2121         case DW_TAG_namelist_item              : break;
2122         case DW_TAG_packed_type                : break;
2123         case DW_TAG_subprogram                 : match_addr_range = true; break;
2124         case DW_TAG_template_type_parameter    : break;
2125         case DW_TAG_template_value_parameter   : break;
2126         case DW_TAG_thrown_type                : break;
2127         case DW_TAG_try_block                  : match_addr_range = true; break;
2128         case DW_TAG_variant_part               : break;
2129         case DW_TAG_variable                   : break;
2130         case DW_TAG_volatile_type              : break;
2131         case DW_TAG_dwarf_procedure            : break;
2132         case DW_TAG_restrict_type              : break;
2133         case DW_TAG_interface_type             : break;
2134         case DW_TAG_namespace                  : check_children = true; break;
2135         case DW_TAG_imported_module            : break;
2136         case DW_TAG_unspecified_type           : break;
2137         case DW_TAG_partial_unit               : break;
2138         case DW_TAG_imported_unit              : break;
2139         case DW_TAG_shared_type                : break;
2140         default: break;
2141         }
2142
2143         if (match_addr_range)
2144         {
2145             dw_addr_t lo_pc = GetAttributeValueAsUnsigned(dwarf2Data, cu, DW_AT_low_pc, LLDB_INVALID_ADDRESS);
2146             if (lo_pc != LLDB_INVALID_ADDRESS)
2147             {
2148                 dw_addr_t hi_pc = GetAttributeHighPC(dwarf2Data, cu, lo_pc, LLDB_INVALID_ADDRESS);
2149                 if (hi_pc != LLDB_INVALID_ADDRESS)
2150                 {
2151                     //  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);
2152                     if ((lo_pc <= address) && (address < hi_pc))
2153                     {
2154                         found_address = true;
2155                     //  puts("***MATCH***");
2156                         switch (m_tag)
2157                         {
2158                         case DW_TAG_compile_unit:       // File
2159                             check_children = ((function_die != NULL) || (block_die != NULL));
2160                             break;
2161
2162                         case DW_TAG_subprogram:         // Function
2163                             if (function_die)
2164                                 *function_die = this;
2165                             check_children = (block_die != NULL);
2166                             break;
2167
2168                         case DW_TAG_inlined_subroutine: // Inlined Function
2169                         case DW_TAG_lexical_block:      // Block { } in code
2170                             if (block_die)
2171                             {
2172                                 *block_die = this;
2173                                 check_children = true;
2174                             }
2175                             break;
2176
2177                         default:
2178                             check_children = true;
2179                             break;
2180                         }
2181                     }
2182                 }
2183                 else
2184                 {   // compile units may not have a valid high/low pc when there
2185                     // are address gaps in subroutines so we must always search
2186                     // if there is no valid high and low PC
2187                     check_children = (m_tag == DW_TAG_compile_unit) && ((function_die != NULL) || (block_die != NULL));
2188                 }
2189             }
2190             else
2191             {
2192                 dw_offset_t debug_ranges_offset = GetAttributeValueAsUnsigned(dwarf2Data, cu, DW_AT_ranges, DW_INVALID_OFFSET);
2193                 if (debug_ranges_offset != DW_INVALID_OFFSET)
2194                 {
2195                     DWARFDebugRanges::RangeList ranges;
2196                     DWARFDebugRanges* debug_ranges = dwarf2Data->DebugRanges();
2197                     debug_ranges->FindRanges(debug_ranges_offset, ranges);
2198                     // All DW_AT_ranges are relative to the base address of the
2199                     // compile unit. We add the compile unit base address to make
2200                     // sure all the addresses are properly fixed up.
2201                     ranges.Slide (cu->GetBaseAddress());
2202                     if (ranges.FindEntryThatContains(address))
2203                     {
2204                         found_address = true;
2205                     //  puts("***MATCH***");
2206                         switch (m_tag)
2207                         {
2208                         case DW_TAG_compile_unit:       // File
2209                             check_children = ((function_die != NULL) || (block_die != NULL));
2210                             break;
2211
2212                         case DW_TAG_subprogram:         // Function
2213                             if (function_die)
2214                                 *function_die = this;
2215                             check_children = (block_die != NULL);
2216                             break;
2217
2218                         case DW_TAG_inlined_subroutine: // Inlined Function
2219                         case DW_TAG_lexical_block:      // Block { } in code
2220                             if (block_die)
2221                             {
2222                                 *block_die = this;
2223                                 check_children = true;
2224                             }
2225                             break;
2226
2227                         default:
2228                             check_children = true;
2229                             break;
2230                         }
2231                     }
2232                     else
2233                     {
2234                         check_children = false;
2235                     }
2236                 }
2237             }
2238         }
2239
2240
2241         if (check_children)
2242         {
2243         //  printf("checking children\n");
2244             DWARFDebugInfoEntry* child = GetFirstChild();
2245             while (child)
2246             {
2247                 if (child->LookupAddress(address, dwarf2Data, cu, function_die, block_die))
2248                     return true;
2249                 child = child->GetSibling();
2250             }
2251         }
2252     }
2253     return found_address;
2254 }
2255
2256 const DWARFAbbreviationDeclaration*
2257 DWARFDebugInfoEntry::GetAbbreviationDeclarationPtr (SymbolFileDWARF* dwarf2Data,
2258                                                     const DWARFCompileUnit *cu,
2259                                                     lldb::offset_t &offset) const
2260 {
2261     if (dwarf2Data)
2262     {
2263         offset = GetOffset();
2264
2265         const DWARFAbbreviationDeclaration* abbrev_decl = cu->GetAbbreviations()->GetAbbreviationDeclaration (m_abbr_idx);
2266         if (abbrev_decl)
2267         {
2268             // Make sure the abbreviation code still matches. If it doesn't and
2269             // the DWARF data was mmap'ed, the backing file might have been modified
2270             // which is bad news.
2271             const uint64_t abbrev_code = dwarf2Data->get_debug_info_data().GetULEB128 (&offset);
2272
2273             if (abbrev_decl->Code() == abbrev_code)
2274                 return abbrev_decl;
2275
2276             dwarf2Data->GetObjectFile()->GetModule()->ReportErrorIfModifyDetected ("0x%8.8x: the DWARF debug information has been modified (abbrev code was %u, and is now %u)",
2277                                                                                    GetOffset(),
2278                                                                                    (uint32_t)abbrev_decl->Code(),
2279                                                                                    (uint32_t)abbrev_code);
2280         }
2281     }
2282     offset = DW_INVALID_OFFSET;
2283     return NULL;
2284 }
2285
2286
2287 bool
2288 DWARFDebugInfoEntry::OffsetLessThan (const DWARFDebugInfoEntry& a, const DWARFDebugInfoEntry& b)
2289 {
2290     return a.GetOffset() < b.GetOffset();
2291 }
2292
2293 void
2294 DWARFDebugInfoEntry::DumpDIECollection (Stream &strm, DWARFDebugInfoEntry::collection &die_collection)
2295 {
2296     DWARFDebugInfoEntry::const_iterator pos;
2297     DWARFDebugInfoEntry::const_iterator end = die_collection.end();
2298     strm.PutCString("\noffset    parent   sibling  child\n");
2299     strm.PutCString("--------  -------- -------- --------\n");
2300     for (pos = die_collection.begin(); pos != end; ++pos)
2301     {
2302         const DWARFDebugInfoEntry& die_ref = *pos;
2303         const DWARFDebugInfoEntry* p = die_ref.GetParent();
2304         const DWARFDebugInfoEntry* s = die_ref.GetSibling();
2305         const DWARFDebugInfoEntry* c = die_ref.GetFirstChild();
2306         strm.Printf("%.8x: %.8x %.8x %.8x 0x%4.4x %s%s\n",
2307                     die_ref.GetOffset(),
2308                     p ? p->GetOffset() : 0,
2309                     s ? s->GetOffset() : 0,
2310                     c ? c->GetOffset() : 0,
2311                     die_ref.Tag(),
2312                     DW_TAG_value_to_name(die_ref.Tag()),
2313                     die_ref.HasChildren() ? " *" : "");
2314     }
2315 }
2316
2317