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Current Path: /usr/src/contrib/llvm-project/lldb/source/Plugins/SymbolFile/DWARF

usr / src / contrib / llvm-project / lldb / source / Plugins / SymbolFile / DWARF /

📁 ..
📄 AppleDWARFIndex.cpp(7.64 KB)
📄 AppleDWARFIndex.h(3.23 KB)
📄 DIERef.cpp(768 B)
📄 DIERef.h(2.46 KB)
📄 DWARFASTParser.h(2.01 KB)
📄 DWARFASTParserClang.cpp(138.9 KB)
📄 DWARFASTParserClang.h(10.29 KB)
📄 DWARFAbbreviationDeclaration.cpp(2.96 KB)
📄 DWARFAbbreviationDeclaration.h(2.6 KB)
📄 DWARFAttribute.cpp(1.86 KB)
📄 DWARFAttribute.h(2.69 KB)
📄 DWARFBaseDIE.cpp(3.4 KB)
📄 DWARFBaseDIE.h(3.76 KB)
📄 DWARFCompileUnit.cpp(3.88 KB)
📄 DWARFCompileUnit.h(1.32 KB)
📄 DWARFContext.cpp(5.27 KB)
📄 DWARFContext.h(2.84 KB)
📄 DWARFDIE.cpp(11.88 KB)
📄 DWARFDIE.h(2.8 KB)
📄 DWARFDataExtractor.cpp(980 B)
📄 DWARFDataExtractor.h(1.25 KB)
📄 DWARFDebugAbbrev.cpp(4.6 KB)
📄 DWARFDebugAbbrev.h(2.92 KB)
📄 DWARFDebugArangeSet.cpp(5.4 KB)
📄 DWARFDebugArangeSet.h(2.35 KB)
📄 DWARFDebugAranges.cpp(2.89 KB)
📄 DWARFDebugAranges.h(1.6 KB)
📄 DWARFDebugInfo.cpp(6.65 KB)
📄 DWARFDebugInfo.h(2.84 KB)
📄 DWARFDebugInfoEntry.cpp(28.41 KB)
📄 DWARFDebugInfoEntry.h(7.26 KB)
📄 DWARFDebugMacro.cpp(4.35 KB)
📄 DWARFDebugMacro.h(1.74 KB)
📄 DWARFDebugRanges.cpp(4.12 KB)
📄 DWARFDebugRanges.h(1.41 KB)
📄 DWARFDeclContext.cpp(3.13 KB)
📄 DWARFDeclContext.h(2.53 KB)
📄 DWARFDefines.cpp(2.6 KB)
📄 DWARFDefines.h(1.09 KB)
📄 DWARFFormValue.cpp(16.48 KB)
📄 DWARFFormValue.h(3.27 KB)
📄 DWARFIndex.cpp(3.17 KB)
📄 DWARFIndex.h(3.76 KB)
📄 DWARFTypeUnit.cpp(857 B)
📄 DWARFTypeUnit.h(1.31 KB)
📄 DWARFUnit.cpp(32.71 KB)
📄 DWARFUnit.h(12.09 KB)
📄 DebugNamesDWARFIndex.cpp(9.7 KB)
📄 DebugNamesDWARFIndex.h(3.98 KB)
📄 HashedNameToDIE.cpp(19.9 KB)
📄 HashedNameToDIE.h(6.8 KB)
📄 LogChannelDWARF.cpp(1.13 KB)
📄 LogChannelDWARF.h(1.16 KB)
📄 ManualDWARFIndex.cpp(16.36 KB)
📄 ManualDWARFIndex.h(3.26 KB)
📄 NameToDIE.cpp(2.7 KB)
📄 NameToDIE.h(1.5 KB)
📄 SymbolFileDWARF.cpp(143.94 KB)
📄 SymbolFileDWARF.h(17.92 KB)
📄 SymbolFileDWARFDebugMap.cpp(54.3 KB)
📄 SymbolFileDWARFDebugMap.h(14.08 KB)
📄 SymbolFileDWARFDwo.cpp(4.41 KB)
📄 SymbolFileDWARFDwo.h(2.33 KB)
📄 SymbolFileDWARFProperties.td(285 B)
📄 UniqueDWARFASTType.cpp(2.84 KB)
📄 UniqueDWARFASTType.h(3.04 KB)

Editing: DWARFDebugInfo.cpp

//===-- DWARFDebugInfo.cpp ------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#include "SymbolFileDWARF.h"

#include <algorithm>
#include <set>

#include "lldb/Host/PosixApi.h"
#include "lldb/Symbol/ObjectFile.h"
#include "lldb/Utility/RegularExpression.h"
#include "lldb/Utility/Stream.h"
#include "llvm/Support/Casting.h"

#include "DWARFCompileUnit.h"
#include "DWARFContext.h"
#include "DWARFDebugAranges.h"
#include "DWARFDebugInfo.h"
#include "DWARFDebugInfoEntry.h"
#include "DWARFFormValue.h"
#include "DWARFTypeUnit.h"

using namespace lldb;
using namespace lldb_private;
using namespace std;

// Constructor
DWARFDebugInfo::DWARFDebugInfo(SymbolFileDWARF &dwarf,
                               lldb_private::DWARFContext &context)
    : m_dwarf(dwarf), m_context(context), m_units(), m_cu_aranges_up() {}

llvm::Expected<DWARFDebugAranges &> DWARFDebugInfo::GetCompileUnitAranges() {
  if (m_cu_aranges_up)
    return *m_cu_aranges_up;

m_cu_aranges_up = std::make_unique<DWARFDebugAranges>();
  const DWARFDataExtractor &debug_aranges_data =
      m_context.getOrLoadArangesData();
  if (llvm::Error error = m_cu_aranges_up->extract(debug_aranges_data))
    return std::move(error);

// Make a list of all CUs represented by the arange data in the file.
  std::set<dw_offset_t> cus_with_data;
  for (size_t n = 0; n < m_cu_aranges_up->GetNumRanges(); n++) {
    dw_offset_t offset = m_cu_aranges_up->OffsetAtIndex(n);
    if (offset != DW_INVALID_OFFSET)
      cus_with_data.insert(offset);
  }

// Manually build arange data for everything that wasn't in the
  // .debug_aranges table.
  const size_t num_units = GetNumUnits();
  for (size_t idx = 0; idx < num_units; ++idx) {
    DWARFUnit *cu = GetUnitAtIndex(idx);

dw_offset_t offset = cu->GetOffset();
    if (cus_with_data.find(offset) == cus_with_data.end())
      cu->BuildAddressRangeTable(m_cu_aranges_up.get());
  }

const bool minimize = true;
  m_cu_aranges_up->Sort(minimize);
  return *m_cu_aranges_up;
}

void DWARFDebugInfo::ParseUnitsFor(DIERef::Section section) {
  DWARFDataExtractor data = section == DIERef::Section::DebugTypes
                                ? m_context.getOrLoadDebugTypesData()
                                : m_context.getOrLoadDebugInfoData();
  const llvm::DWARFUnitIndex *index = nullptr;
  if (m_context.isDwo())
    index = &llvm::getDWARFUnitIndex(m_context.GetAsLLVM(),
                                     section == DIERef::Section::DebugTypes
                                         ? llvm::DW_SECT_EXT_TYPES
                                         : llvm::DW_SECT_INFO);
  lldb::offset_t offset = 0;
  while (data.ValidOffset(offset)) {
    llvm::Expected<DWARFUnitSP> unit_sp = DWARFUnit::extract(
        m_dwarf, m_units.size(), data, section, &offset, index);

if (!unit_sp) {
      // FIXME: Propagate this error up.
      llvm::consumeError(unit_sp.takeError());
      return;
    }

// If it didn't return an error, then it should be returning a valid Unit.
    assert(*unit_sp);
    m_units.push_back(*unit_sp);
    offset = (*unit_sp)->GetNextUnitOffset();

if (auto *type_unit = llvm::dyn_cast<DWARFTypeUnit>(unit_sp->get())) {
      m_type_hash_to_unit_index.emplace_back(type_unit->GetTypeHash(),
                                             unit_sp.get()->GetID());
    }
  }
}

void DWARFDebugInfo::ParseUnitHeadersIfNeeded() {
  llvm::call_once(m_units_once_flag, [&] {
    ParseUnitsFor(DIERef::Section::DebugInfo);
    ParseUnitsFor(DIERef::Section::DebugTypes);
    llvm::sort(m_type_hash_to_unit_index, llvm::less_first());
  });
}

size_t DWARFDebugInfo::GetNumUnits() {
  ParseUnitHeadersIfNeeded();
  return m_units.size();
}

DWARFUnit *DWARFDebugInfo::GetUnitAtIndex(size_t idx) {
  DWARFUnit *cu = nullptr;
  if (idx < GetNumUnits())
    cu = m_units[idx].get();
  return cu;
}

uint32_t DWARFDebugInfo::FindUnitIndex(DIERef::Section section,
                                       dw_offset_t offset) {
  ParseUnitHeadersIfNeeded();

// llvm::lower_bound is not used as for DIE offsets it would still return
  // index +1 and GetOffset() returning index itself would be a special case.
  auto pos = llvm::upper_bound(
      m_units, std::make_pair(section, offset),
      [](const std::pair<DIERef::Section, dw_offset_t> &lhs,
         const DWARFUnitSP &rhs) {
        return lhs < std::make_pair(rhs->GetDebugSection(), rhs->GetOffset());
      });
  uint32_t idx = std::distance(m_units.begin(), pos);
  if (idx == 0)
    return DW_INVALID_OFFSET;
  return idx - 1;
}

DWARFUnit *DWARFDebugInfo::GetUnitAtOffset(DIERef::Section section,
                                           dw_offset_t cu_offset,
                                           uint32_t *idx_ptr) {
  uint32_t idx = FindUnitIndex(section, cu_offset);
  DWARFUnit *result = GetUnitAtIndex(idx);
  if (result && result->GetOffset() != cu_offset) {
    result = nullptr;
    idx = DW_INVALID_INDEX;
  }
  if (idx_ptr)
    *idx_ptr = idx;
  return result;
}

DWARFUnit *DWARFDebugInfo::GetUnit(const DIERef &die_ref) {
  return GetUnitContainingDIEOffset(die_ref.section(), die_ref.die_offset());
}

DWARFUnit *
DWARFDebugInfo::GetUnitContainingDIEOffset(DIERef::Section section,
                                           dw_offset_t die_offset) {
  uint32_t idx = FindUnitIndex(section, die_offset);
  DWARFUnit *result = GetUnitAtIndex(idx);
  if (result && !result->ContainsDIEOffset(die_offset))
    return nullptr;
  return result;
}

DWARFTypeUnit *DWARFDebugInfo::GetTypeUnitForHash(uint64_t hash) {
  auto pos = llvm::lower_bound(m_type_hash_to_unit_index,
                               std::make_pair(hash, 0u), llvm::less_first());
  if (pos == m_type_hash_to_unit_index.end() || pos->first != hash)
    return nullptr;
  return llvm::cast<DWARFTypeUnit>(GetUnitAtIndex(pos->second));
}

bool DWARFDebugInfo::ContainsTypeUnits() {
  ParseUnitHeadersIfNeeded();
  return !m_type_hash_to_unit_index.empty();
}

DWARFDIE
DWARFDebugInfo::GetDIEForDIEOffset(DIERef::Section section,
                                   dw_offset_t die_offset) {
  DWARFUnit *cu = GetUnitContainingDIEOffset(section, die_offset);
  if (cu)
    return cu->GetDIE(die_offset);
  return DWARFDIE();
}

// GetDIE()
//
// Get the DIE (Debug Information Entry) with the specified offset.
DWARFDIE
DWARFDebugInfo::GetDIE(const DIERef &die_ref) {
  DWARFUnit *cu = GetUnit(die_ref);
  if (cu)
    return cu->GetNonSkeletonUnit().GetDIE(die_ref.die_offset());
  return DWARFDIE(); // Not found
}

003 File Manager

Editing: DWARFDebugInfo.cpp

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