void DWARFUnitSectionBase::parseDWO(DWARFContext &C, const DWARFSection &DWOSection, DWARFUnitIndex *Index) { parseImpl(C, DWOSection, C.getDebugAbbrevDWO(), C.getRangeDWOSection(), C.getStringDWOSection(), C.getStringOffsetDWOSection(), C.getAddrSection(), C.isLittleEndian()); }
static bool isVariableIndexable(const DWARFDie &Die, DWARFContext &DCtx) { Optional<DWARFFormValue> Location = Die.findRecursively(DW_AT_location); if (!Location) return false; auto ContainsInterestingOperators = [&](StringRef D) { DWARFUnit *U = Die.getDwarfUnit(); DataExtractor Data(D, DCtx.isLittleEndian(), U->getAddressByteSize()); DWARFExpression Expression(Data, U->getVersion(), U->getAddressByteSize()); return any_of(Expression, [](DWARFExpression::Operation &Op) { return !Op.isError() && (Op.getCode() == DW_OP_addr || Op.getCode() == DW_OP_form_tls_address || Op.getCode() == DW_OP_GNU_push_tls_address); }); }; if (Optional<ArrayRef<uint8_t>> Expr = Location->getAsBlock()) { // Inlined location. if (ContainsInterestingOperators(toStringRef(*Expr))) return true; } else if (Optional<uint64_t> Offset = Location->getAsSectionOffset()) { // Location list. if (const DWARFDebugLoc *DebugLoc = DCtx.getDebugLoc()) { if (const DWARFDebugLoc::LocationList *LocList = DebugLoc->getLocationListAtOffset(*Offset)) { if (any_of(LocList->Entries, [&](const DWARFDebugLoc::Entry &E) { return ContainsInterestingOperators({E.Loc.data(), E.Loc.size()}); })) return true; } } } return false; }
void DWARFUnitSectionBase::parseDWO(DWARFContext &C, const DWARFSection &DWOSection, bool Lazy) { const DWARFObject &D = C.getDWARFObj(); parseImpl(C, DWOSection, C.getDebugAbbrevDWO(), &D.getRangeDWOSection(), D.getStringDWOSection(), D.getStringOffsetDWOSection(), &D.getAddrSection(), D.getLineDWOSection(), C.isLittleEndian(), true, Lazy); }
void DWARFUnitVector::addUnitsForDWOSection(DWARFContext &C, const DWARFSection &DWOSection, DWARFSectionKind SectionKind, bool Lazy) { const DWARFObject &D = C.getDWARFObj(); addUnitsImpl(C, D, DWOSection, C.getDebugAbbrevDWO(), &D.getRangeDWOSection(), D.getStringDWOSection(), D.getStringOffsetDWOSection(), &D.getAddrSection(), D.getLineDWOSection(), C.isLittleEndian(), true, Lazy, SectionKind); }
/// Emit location lists for \p Unit and update attributes to point to the new /// entries. void DwarfStreamer::emitLocationsForUnit(const CompileUnit &Unit, DWARFContext &Dwarf) { const auto &Attributes = Unit.getLocationAttributes(); if (Attributes.empty()) return; MS->SwitchSection(MC->getObjectFileInfo()->getDwarfLocSection()); unsigned AddressSize = Unit.getOrigUnit().getAddressByteSize(); const DWARFSection &InputSec = Dwarf.getDWARFObj().getLocSection(); DataExtractor Data(InputSec.Data, Dwarf.isLittleEndian(), AddressSize); DWARFUnit &OrigUnit = Unit.getOrigUnit(); auto OrigUnitDie = OrigUnit.getUnitDIE(false); int64_t UnitPcOffset = 0; if (auto OrigLowPc = dwarf::toAddress(OrigUnitDie.find(dwarf::DW_AT_low_pc))) UnitPcOffset = int64_t(*OrigLowPc) - Unit.getLowPc(); for (const auto &Attr : Attributes) { uint32_t Offset = Attr.first.get(); Attr.first.set(LocSectionSize); // This is the quantity to add to the old location address to get // the correct address for the new one. int64_t LocPcOffset = Attr.second + UnitPcOffset; while (Data.isValidOffset(Offset)) { uint64_t Low = Data.getUnsigned(&Offset, AddressSize); uint64_t High = Data.getUnsigned(&Offset, AddressSize); LocSectionSize += 2 * AddressSize; if (Low == 0 && High == 0) { Asm->OutStreamer->EmitIntValue(0, AddressSize); Asm->OutStreamer->EmitIntValue(0, AddressSize); break; } Asm->OutStreamer->EmitIntValue(Low + LocPcOffset, AddressSize); Asm->OutStreamer->EmitIntValue(High + LocPcOffset, AddressSize); uint64_t Length = Data.getU16(&Offset); Asm->OutStreamer->EmitIntValue(Length, 2); // Just copy the bytes over. Asm->OutStreamer->EmitBytes( StringRef(InputSec.Data.substr(Offset, Length))); Offset += Length; LocSectionSize += Length + 2; } } }
void DWARFUnitSectionBase::parse(DWARFContext &C, const DWARFSection &Section) { parseImpl(C, Section, C.getDebugAbbrev(), C.getRangeSection(), C.getStringSection(), StringRef(), C.getAddrSection(), C.isLittleEndian()); }