diff options
Diffstat (limited to 'llvm/tools/llvm-dwp/llvm-dwp.cpp')
| -rw-r--r-- | llvm/tools/llvm-dwp/llvm-dwp.cpp | 851 |
1 files changed, 1 insertions, 850 deletions
diff --git a/llvm/tools/llvm-dwp/llvm-dwp.cpp b/llvm/tools/llvm-dwp/llvm-dwp.cpp index c5e54f2..5d70d91 100644 --- a/llvm/tools/llvm-dwp/llvm-dwp.cpp +++ b/llvm/tools/llvm-dwp/llvm-dwp.cpp @@ -10,40 +10,22 @@ // package files). // //===----------------------------------------------------------------------===// +#include "DWP.h" #include "DWPError.h" #include "DWPStringPool.h" -#include "llvm/ADT/MapVector.h" -#include "llvm/ADT/Optional.h" -#include "llvm/ADT/STLExtras.h" -#include "llvm/DebugInfo/DWARF/DWARFContext.h" -#include "llvm/DebugInfo/DWARF/DWARFDataExtractor.h" -#include "llvm/DebugInfo/DWARF/DWARFFormValue.h" -#include "llvm/DebugInfo/DWARF/DWARFUnitIndex.h" #include "llvm/MC/MCAsmBackend.h" #include "llvm/MC/MCAsmInfo.h" #include "llvm/MC/MCCodeEmitter.h" #include "llvm/MC/MCContext.h" #include "llvm/MC/MCInstrInfo.h" -#include "llvm/MC/MCObjectFileInfo.h" #include "llvm/MC/MCObjectWriter.h" -#include "llvm/MC/MCRegisterInfo.h" -#include "llvm/MC/MCStreamer.h" #include "llvm/MC/MCTargetOptionsCommandFlags.h" -#include "llvm/Object/Decompressor.h" -#include "llvm/Object/ObjectFile.h" #include "llvm/Support/CommandLine.h" -#include "llvm/Support/DataExtractor.h" -#include "llvm/Support/Error.h" #include "llvm/Support/FileSystem.h" #include "llvm/Support/InitLLVM.h" -#include "llvm/Support/MathExtras.h" -#include "llvm/Support/MemoryBuffer.h" -#include "llvm/Support/Path.h" #include "llvm/Support/TargetRegistry.h" #include "llvm/Support/TargetSelect.h" #include "llvm/Support/ToolOutputFile.h" -#include "llvm/Support/WithColor.h" -#include "llvm/Support/raw_ostream.h" using namespace llvm; using namespace llvm::object; @@ -65,561 +47,6 @@ static cl::opt<std::string> OutputFilename(cl::Required, "o", cl::value_desc("filename"), cl::cat(DwpCategory)); -// Returns the size of debug_str_offsets section headers in bytes. -static uint64_t debugStrOffsetsHeaderSize(DataExtractor StrOffsetsData, - uint16_t DwarfVersion) { - if (DwarfVersion <= 4) - return 0; // There is no header before dwarf 5. - uint64_t Offset = 0; - uint64_t Length = StrOffsetsData.getU32(&Offset); - if (Length == llvm::dwarf::DW_LENGTH_DWARF64) - return 16; // unit length: 12 bytes, version: 2 bytes, padding: 2 bytes. - return 8; // unit length: 4 bytes, version: 2 bytes, padding: 2 bytes. -} - -// Holds data for Skeleton, Split Compilation, and Type Unit Headers (only in -// v5) as defined in Dwarf 5 specification, 7.5.1.2, 7.5.1.3 and Dwarf 4 -// specification 7.5.1.1. -struct InfoSectionUnitHeader { - // unit_length field. Note that the type is uint64_t even in 32-bit dwarf. - uint64_t Length = 0; - - // version field. - uint16_t Version = 0; - - // unit_type field. Initialized only if Version >= 5. - uint8_t UnitType = 0; - - // address_size field. - uint8_t AddrSize = 0; - - // debug_abbrev_offset field. Note that the type is uint64_t even in 32-bit - // dwarf. It is assumed to be 0. - uint64_t DebugAbbrevOffset = 0; - - // dwo_id field. This resides in the header only if Version >= 5. - // In earlier versions, it is read from DW_AT_GNU_dwo_id. - Optional<uint64_t> Signature = None; - - // Derived from the length of Length field. - dwarf::DwarfFormat Format = dwarf::DwarfFormat::DWARF32; - - // The size of the Header in bytes. This is derived while parsing the header, - // and is stored as a convenience. - uint8_t HeaderSize = 0; -}; - -// Parse and return the header of an info section compile/type unit. -static Expected<InfoSectionUnitHeader> -parseInfoSectionUnitHeader(StringRef Info) { - InfoSectionUnitHeader Header; - Error Err = Error::success(); - uint64_t Offset = 0; - DWARFDataExtractor InfoData(Info, true, 0); - std::tie(Header.Length, Header.Format) = - InfoData.getInitialLength(&Offset, &Err); - if (Err) - return make_error<DWPError>("cannot parse compile unit length: " + - llvm::toString(std::move(Err))); - - if (!InfoData.isValidOffset(Offset + (Header.Length - 1))) { - return make_error<DWPError>( - "compile unit exceeds .debug_info section range: " + - utostr(Offset + Header.Length) + " >= " + utostr(InfoData.size())); - } - - Header.Version = InfoData.getU16(&Offset, &Err); - if (Err) - return make_error<DWPError>("cannot parse compile unit version: " + - llvm::toString(std::move(Err))); - - uint64_t MinHeaderLength; - if (Header.Version >= 5) { - // Size: Version (2), UnitType (1), AddrSize (1), DebugAbbrevOffset (4), - // Signature (8) - MinHeaderLength = 16; - } else { - // Size: Version (2), DebugAbbrevOffset (4), AddrSize (1) - MinHeaderLength = 7; - } - if (Header.Length < MinHeaderLength) { - return make_error<DWPError>("unit length is too small: expected at least " + - utostr(MinHeaderLength) + " got " + - utostr(Header.Length) + "."); - } - if (Header.Version >= 5) { - Header.UnitType = InfoData.getU8(&Offset); - Header.AddrSize = InfoData.getU8(&Offset); - Header.DebugAbbrevOffset = InfoData.getU32(&Offset); - Header.Signature = InfoData.getU64(&Offset); - if (Header.UnitType == dwarf::DW_UT_split_type) { - // Type offset. - MinHeaderLength += 4; - if (Header.Length < MinHeaderLength) - return make_error<DWPError>("type unit is missing type offset"); - InfoData.getU32(&Offset); - } - } else { - // Note that, address_size and debug_abbrev_offset fields have switched - // places between dwarf version 4 and 5. - Header.DebugAbbrevOffset = InfoData.getU32(&Offset); - Header.AddrSize = InfoData.getU8(&Offset); - } - - Header.HeaderSize = Offset; - return Header; -} - -static void writeStringsAndOffsets(MCStreamer &Out, DWPStringPool &Strings, - MCSection *StrOffsetSection, - StringRef CurStrSection, - StringRef CurStrOffsetSection, - uint16_t Version) { - // Could possibly produce an error or warning if one of these was non-null but - // the other was null. - if (CurStrSection.empty() || CurStrOffsetSection.empty()) - return; - - DenseMap<uint64_t, uint32_t> OffsetRemapping; - - DataExtractor Data(CurStrSection, true, 0); - uint64_t LocalOffset = 0; - uint64_t PrevOffset = 0; - while (const char *s = Data.getCStr(&LocalOffset)) { - OffsetRemapping[PrevOffset] = - Strings.getOffset(s, LocalOffset - PrevOffset); - PrevOffset = LocalOffset; - } - - Data = DataExtractor(CurStrOffsetSection, true, 0); - - Out.SwitchSection(StrOffsetSection); - - uint64_t HeaderSize = debugStrOffsetsHeaderSize(Data, Version); - uint64_t Offset = 0; - uint64_t Size = CurStrOffsetSection.size(); - // FIXME: This can be caused by bad input and should be handled as such. - assert(HeaderSize <= Size && "StrOffsetSection size is less than its header"); - // Copy the header to the output. - Out.emitBytes(Data.getBytes(&Offset, HeaderSize)); - while (Offset < Size) { - auto OldOffset = Data.getU32(&Offset); - auto NewOffset = OffsetRemapping[OldOffset]; - Out.emitIntValue(NewOffset, 4); - } -} - -static uint64_t getCUAbbrev(StringRef Abbrev, uint64_t AbbrCode) { - uint64_t Offset = 0; - DataExtractor AbbrevData(Abbrev, true, 0); - while (AbbrevData.getULEB128(&Offset) != AbbrCode) { - // Tag - AbbrevData.getULEB128(&Offset); - // DW_CHILDREN - AbbrevData.getU8(&Offset); - // Attributes - while (AbbrevData.getULEB128(&Offset) | AbbrevData.getULEB128(&Offset)) - ; - } - return Offset; -} - -struct CompileUnitIdentifiers { - uint64_t Signature = 0; - const char *Name = ""; - const char *DWOName = ""; -}; - -static Expected<const char *> -getIndexedString(dwarf::Form Form, DataExtractor InfoData, uint64_t &InfoOffset, - StringRef StrOffsets, StringRef Str, uint16_t Version) { - if (Form == dwarf::DW_FORM_string) - return InfoData.getCStr(&InfoOffset); - uint64_t StrIndex; - switch (Form) { - case dwarf::DW_FORM_strx1: - StrIndex = InfoData.getU8(&InfoOffset); - break; - case dwarf::DW_FORM_strx2: - StrIndex = InfoData.getU16(&InfoOffset); - break; - case dwarf::DW_FORM_strx3: - StrIndex = InfoData.getU24(&InfoOffset); - break; - case dwarf::DW_FORM_strx4: - StrIndex = InfoData.getU32(&InfoOffset); - break; - case dwarf::DW_FORM_strx: - case dwarf::DW_FORM_GNU_str_index: - StrIndex = InfoData.getULEB128(&InfoOffset); - break; - default: - return make_error<DWPError>( - "string field must be encoded with one of the following: " - "DW_FORM_string, DW_FORM_strx, DW_FORM_strx1, DW_FORM_strx2, " - "DW_FORM_strx3, DW_FORM_strx4, or DW_FORM_GNU_str_index."); - } - DataExtractor StrOffsetsData(StrOffsets, true, 0); - uint64_t StrOffsetsOffset = 4 * StrIndex; - StrOffsetsOffset += debugStrOffsetsHeaderSize(StrOffsetsData, Version); - - uint64_t StrOffset = StrOffsetsData.getU32(&StrOffsetsOffset); - DataExtractor StrData(Str, true, 0); - return StrData.getCStr(&StrOffset); -} - -static Expected<CompileUnitIdentifiers> -getCUIdentifiers(InfoSectionUnitHeader &Header, StringRef Abbrev, - StringRef Info, StringRef StrOffsets, StringRef Str) { - DataExtractor InfoData(Info, true, 0); - uint64_t Offset = Header.HeaderSize; - if (Header.Version >= 5 && Header.UnitType != dwarf::DW_UT_split_compile) - return make_error<DWPError>( - std::string("unit type DW_UT_split_compile type not found in " - "debug_info header. Unexpected unit type 0x" + - utostr(Header.UnitType) + " found")); - - CompileUnitIdentifiers ID; - - uint32_t AbbrCode = InfoData.getULEB128(&Offset); - DataExtractor AbbrevData(Abbrev, true, 0); - uint64_t AbbrevOffset = getCUAbbrev(Abbrev, AbbrCode); - auto Tag = static_cast<dwarf::Tag>(AbbrevData.getULEB128(&AbbrevOffset)); - if (Tag != dwarf::DW_TAG_compile_unit) - return make_error<DWPError>("top level DIE is not a compile unit"); - // DW_CHILDREN - AbbrevData.getU8(&AbbrevOffset); - uint32_t Name; - dwarf::Form Form; - while ((Name = AbbrevData.getULEB128(&AbbrevOffset)) | - (Form = static_cast<dwarf::Form>(AbbrevData.getULEB128(&AbbrevOffset))) && - (Name != 0 || Form != 0)) { - switch (Name) { - case dwarf::DW_AT_name: { - Expected<const char *> EName = getIndexedString( - Form, InfoData, Offset, StrOffsets, Str, Header.Version); - if (!EName) - return EName.takeError(); - ID.Name = *EName; - break; - } - case dwarf::DW_AT_GNU_dwo_name: - case dwarf::DW_AT_dwo_name: { - Expected<const char *> EName = getIndexedString( - Form, InfoData, Offset, StrOffsets, Str, Header.Version); - if (!EName) - return EName.takeError(); - ID.DWOName = *EName; - break; - } - case dwarf::DW_AT_GNU_dwo_id: - Header.Signature = InfoData.getU64(&Offset); - break; - default: - DWARFFormValue::skipValue( - Form, InfoData, &Offset, - dwarf::FormParams({Header.Version, Header.AddrSize, Header.Format})); - } - } - if (!Header.Signature) - return make_error<DWPError>("compile unit missing dwo_id"); - ID.Signature = *Header.Signature; - return ID; -} - -struct UnitIndexEntry { - DWARFUnitIndex::Entry::SectionContribution Contributions[8]; - std::string Name; - std::string DWOName; - StringRef DWPName; -}; - -static bool isSupportedSectionKind(DWARFSectionKind Kind) { - return Kind != DW_SECT_EXT_unknown; -} - -// Convert an internal section identifier into the index to use with -// UnitIndexEntry::Contributions. -static unsigned getContributionIndex(DWARFSectionKind Kind, - uint32_t IndexVersion) { - assert(serializeSectionKind(Kind, IndexVersion) >= DW_SECT_INFO); - return serializeSectionKind(Kind, IndexVersion) - DW_SECT_INFO; -} - -// Convert a UnitIndexEntry::Contributions index to the corresponding on-disk -// value of the section identifier. -static unsigned getOnDiskSectionId(unsigned Index) { - return Index + DW_SECT_INFO; -} - -static StringRef getSubsection(StringRef Section, - const DWARFUnitIndex::Entry &Entry, - DWARFSectionKind Kind) { - const auto *Off = Entry.getContribution(Kind); - if (!Off) - return StringRef(); - return Section.substr(Off->Offset, Off->Length); -} - -static void -addAllTypesFromDWP(MCStreamer &Out, - MapVector<uint64_t, UnitIndexEntry> &TypeIndexEntries, - const DWARFUnitIndex &TUIndex, MCSection *OutputTypes, - StringRef Types, const UnitIndexEntry &TUEntry, - uint32_t &TypesOffset, unsigned TypesContributionIndex) { - Out.SwitchSection(OutputTypes); - for (const DWARFUnitIndex::Entry &E : TUIndex.getRows()) { - auto *I = E.getContributions(); - if (!I) - continue; - auto P = TypeIndexEntries.insert(std::make_pair(E.getSignature(), TUEntry)); - if (!P.second) - continue; - auto &Entry = P.first->second; - // Zero out the debug_info contribution - Entry.Contributions[0] = {}; - for (auto Kind : TUIndex.getColumnKinds()) { - if (!isSupportedSectionKind(Kind)) - continue; - auto &C = - Entry.Contributions[getContributionIndex(Kind, TUIndex.getVersion())]; - C.Offset += I->Offset; - C.Length = I->Length; - ++I; - } - auto &C = Entry.Contributions[TypesContributionIndex]; - Out.emitBytes(Types.substr( - C.Offset - TUEntry.Contributions[TypesContributionIndex].Offset, - C.Length)); - C.Offset = TypesOffset; - TypesOffset += C.Length; - } -} - -static void addAllTypesFromTypesSection( - MCStreamer &Out, MapVector<uint64_t, UnitIndexEntry> &TypeIndexEntries, - MCSection *OutputTypes, const std::vector<StringRef> &TypesSections, - const UnitIndexEntry &CUEntry, uint32_t &TypesOffset) { - for (StringRef Types : TypesSections) { - Out.SwitchSection(OutputTypes); - uint64_t Offset = 0; - DataExtractor Data(Types, true, 0); - while (Data.isValidOffset(Offset)) { - UnitIndexEntry Entry = CUEntry; - // Zero out the debug_info contribution - Entry.Contributions[0] = {}; - auto &C = Entry.Contributions[getContributionIndex(DW_SECT_EXT_TYPES, 2)]; - C.Offset = TypesOffset; - auto PrevOffset = Offset; - // Length of the unit, including the 4 byte length field. - C.Length = Data.getU32(&Offset) + 4; - - Data.getU16(&Offset); // Version - Data.getU32(&Offset); // Abbrev offset - Data.getU8(&Offset); // Address size - auto Signature = Data.getU64(&Offset); - Offset = PrevOffset + C.Length; - - auto P = TypeIndexEntries.insert(std::make_pair(Signature, Entry)); - if (!P.second) - continue; - - Out.emitBytes(Types.substr(PrevOffset, C.Length)); - TypesOffset += C.Length; - } - } -} - -static void -writeIndexTable(MCStreamer &Out, ArrayRef<unsigned> ContributionOffsets, - const MapVector<uint64_t, UnitIndexEntry> &IndexEntries, - uint32_t DWARFUnitIndex::Entry::SectionContribution::*Field) { - for (const auto &E : IndexEntries) - for (size_t i = 0; i != array_lengthof(E.second.Contributions); ++i) - if (ContributionOffsets[i]) - Out.emitIntValue(E.second.Contributions[i].*Field, 4); -} - -static void writeIndex(MCStreamer &Out, MCSection *Section, - ArrayRef<unsigned> ContributionOffsets, - const MapVector<uint64_t, UnitIndexEntry> &IndexEntries, - uint32_t IndexVersion) { - if (IndexEntries.empty()) - return; - - unsigned Columns = 0; - for (auto &C : ContributionOffsets) - if (C) - ++Columns; - - std::vector<unsigned> Buckets(NextPowerOf2(3 * IndexEntries.size() / 2)); - uint64_t Mask = Buckets.size() - 1; - size_t i = 0; - for (const auto &P : IndexEntries) { - auto S = P.first; - auto H = S & Mask; - auto HP = ((S >> 32) & Mask) | 1; - while (Buckets[H]) { - assert(S != IndexEntries.begin()[Buckets[H] - 1].first && - "Duplicate unit"); - H = (H + HP) & Mask; - } - Buckets[H] = i + 1; - ++i; - } - - Out.SwitchSection(Section); - Out.emitIntValue(IndexVersion, 4); // Version - Out.emitIntValue(Columns, 4); // Columns - Out.emitIntValue(IndexEntries.size(), 4); // Num Units - Out.emitIntValue(Buckets.size(), 4); // Num Buckets - - // Write the signatures. - for (const auto &I : Buckets) - Out.emitIntValue(I ? IndexEntries.begin()[I - 1].first : 0, 8); - - // Write the indexes. - for (const auto &I : Buckets) - Out.emitIntValue(I, 4); - - // Write the column headers (which sections will appear in the table) - for (size_t i = 0; i != ContributionOffsets.size(); ++i) - if (ContributionOffsets[i]) - Out.emitIntValue(getOnDiskSectionId(i), 4); - - // Write the offsets. - writeIndexTable(Out, ContributionOffsets, IndexEntries, - &DWARFUnitIndex::Entry::SectionContribution::Offset); - - // Write the lengths. - writeIndexTable(Out, ContributionOffsets, IndexEntries, - &DWARFUnitIndex::Entry::SectionContribution::Length); -} - -static std::string buildDWODescription(StringRef Name, StringRef DWPName, - StringRef DWOName) { - std::string Text = "\'"; - Text += Name; - Text += '\''; - if (!DWPName.empty()) { - Text += " (from "; - if (!DWOName.empty()) { - Text += '\''; - Text += DWOName; - Text += "' in "; - } - Text += '\''; - Text += DWPName; - Text += "')"; - } - return Text; -} - -static Error createError(StringRef Name, Error E) { - return make_error<DWPError>( - ("failure while decompressing compressed section: '" + Name + "', " + - llvm::toString(std::move(E))) - .str()); -} - -static Error -handleCompressedSection(std::deque<SmallString<32>> &UncompressedSections, - StringRef &Name, StringRef &Contents) { - if (!Decompressor::isGnuStyle(Name)) - return Error::success(); - - Expected<Decompressor> Dec = - Decompressor::create(Name, Contents, false /*IsLE*/, false /*Is64Bit*/); - if (!Dec) - return createError(Name, Dec.takeError()); - - UncompressedSections.emplace_back(); - if (Error E = Dec->resizeAndDecompress(UncompressedSections.back())) - return createError(Name, std::move(E)); - - Name = Name.substr(2); // Drop ".z" - Contents = UncompressedSections.back(); - return Error::success(); -} - -static Error handleSection( - const StringMap<std::pair<MCSection *, DWARFSectionKind>> &KnownSections, - const MCSection *StrSection, const MCSection *StrOffsetSection, - const MCSection *TypesSection, const MCSection *CUIndexSection, - const MCSection *TUIndexSection, const MCSection *InfoSection, - const SectionRef &Section, MCStreamer &Out, - std::deque<SmallString<32>> &UncompressedSections, - uint32_t (&ContributionOffsets)[8], UnitIndexEntry &CurEntry, - StringRef &CurStrSection, StringRef &CurStrOffsetSection, - std::vector<StringRef> &CurTypesSection, - std::vector<StringRef> &CurInfoSection, StringRef &AbbrevSection, - StringRef &CurCUIndexSection, StringRef &CurTUIndexSection, - std::vector<std::pair<DWARFSectionKind, uint32_t>> &SectionLength) { - if (Section.isBSS()) - return Error::success(); - - if (Section.isVirtual()) - return Error::success(); - - Expected<StringRef> NameOrErr = Section.getName(); - if (!NameOrErr) - return NameOrErr.takeError(); - StringRef Name = *NameOrErr; - - Expected<StringRef> ContentsOrErr = Section.getContents(); - if (!ContentsOrErr) - return ContentsOrErr.takeError(); - StringRef Contents = *ContentsOrErr; - - if (auto Err = handleCompressedSection(UncompressedSections, Name, Contents)) - return Err; - - Name = Name.substr(Name.find_first_not_of("._")); - - auto SectionPair = KnownSections.find(Name); - if (SectionPair == KnownSections.end()) - return Error::success(); - - if (DWARFSectionKind Kind = SectionPair->second.second) { - if (Kind != DW_SECT_EXT_TYPES && Kind != DW_SECT_INFO) { - SectionLength.push_back(std::make_pair(Kind, Contents.size())); - } - - if (Kind == DW_SECT_ABBREV) { - AbbrevSection = Contents; - } - } - - MCSection *OutSection = SectionPair->second.first; - if (OutSection == StrOffsetSection) - CurStrOffsetSection = Contents; - else if (OutSection == StrSection) - CurStrSection = Contents; - else if (OutSection == TypesSection) - CurTypesSection.push_back(Contents); - else if (OutSection == CUIndexSection) - CurCUIndexSection = Contents; - else if (OutSection == TUIndexSection) - CurTUIndexSection = Contents; - else if (OutSection == InfoSection) - CurInfoSection.push_back(Contents); - else { - Out.SwitchSection(OutSection); - Out.emitBytes(Contents); - } - return Error::success(); -} - -static Error -buildDuplicateError(const std::pair<uint64_t, UnitIndexEntry> &PrevE, - const CompileUnitIdentifiers &ID, StringRef DWPName) { - return make_error<DWPError>( - std::string("duplicate DWO ID (") + utohexstr(PrevE.first) + ") in " + - buildDWODescription(PrevE.second.Name, PrevE.second.DWPName, - PrevE.second.DWOName) + - " and " + buildDWODescription(ID.Name, DWPName, ID.DWOName)); -} - static Expected<SmallVector<std::string, 16>> getDWOFilenames(StringRef ExecFilename) { auto ErrOrObj = object::ObjectFile::createObjectFile(ExecFilename); @@ -649,282 +76,6 @@ getDWOFilenames(StringRef ExecFilename) { return std::move(DWOPaths); } -static Error write(MCStreamer &Out, ArrayRef<std::string> Inputs) { - const auto &MCOFI = *Out.getContext().getObjectFileInfo(); - MCSection *const StrSection = MCOFI.getDwarfStrDWOSection(); - MCSection *const StrOffsetSection = MCOFI.getDwarfStrOffDWOSection(); - MCSection *const TypesSection = MCOFI.getDwarfTypesDWOSection(); - MCSection *const CUIndexSection = MCOFI.getDwarfCUIndexSection(); - MCSection *const TUIndexSection = MCOFI.getDwarfTUIndexSection(); - MCSection *const InfoSection = MCOFI.getDwarfInfoDWOSection(); - const StringMap<std::pair<MCSection *, DWARFSectionKind>> KnownSections = { - {"debug_info.dwo", {InfoSection, DW_SECT_INFO}}, - {"debug_types.dwo", {MCOFI.getDwarfTypesDWOSection(), DW_SECT_EXT_TYPES}}, - {"debug_str_offsets.dwo", {StrOffsetSection, DW_SECT_STR_OFFSETS}}, - {"debug_str.dwo", {StrSection, static_cast<DWARFSectionKind>(0)}}, - {"debug_loc.dwo", {MCOFI.getDwarfLocDWOSection(), DW_SECT_EXT_LOC}}, - {"debug_line.dwo", {MCOFI.getDwarfLineDWOSection(), DW_SECT_LINE}}, - {"debug_macro.dwo", {MCOFI.getDwarfMacroDWOSection(), DW_SECT_MACRO}}, - {"debug_abbrev.dwo", {MCOFI.getDwarfAbbrevDWOSection(), DW_SECT_ABBREV}}, - {"debug_loclists.dwo", - {MCOFI.getDwarfLoclistsDWOSection(), DW_SECT_LOCLISTS}}, - {"debug_rnglists.dwo", - {MCOFI.getDwarfRnglistsDWOSection(), DW_SECT_RNGLISTS}}, - {"debug_cu_index", {CUIndexSection, static_cast<DWARFSectionKind>(0)}}, - {"debug_tu_index", {TUIndexSection, static_cast<DWARFSectionKind>(0)}}}; - - MapVector<uint64_t, UnitIndexEntry> IndexEntries; - MapVector<uint64_t, UnitIndexEntry> TypeIndexEntries; - - uint32_t ContributionOffsets[8] = {}; - uint16_t Version = 0; - uint32_t IndexVersion = 0; - - DWPStringPool Strings(Out, StrSection); - - SmallVector<OwningBinary<object::ObjectFile>, 128> Objects; - Objects.reserve(Inputs.size()); - - std::deque<SmallString<32>> UncompressedSections; - - for (const auto &Input : Inputs) { - auto ErrOrObj = object::ObjectFile::createObjectFile(Input); - if (!ErrOrObj) - return ErrOrObj.takeError(); - - auto &Obj = *ErrOrObj->getBinary(); - Objects.push_back(std::move(*ErrOrObj)); - - UnitIndexEntry CurEntry = {}; - - StringRef CurStrSection; - StringRef CurStrOffsetSection; - std::vector<StringRef> CurTypesSection; - std::vector<StringRef> CurInfoSection; - StringRef AbbrevSection; - StringRef CurCUIndexSection; - StringRef CurTUIndexSection; - - // This maps each section contained in this file to its length. - // This information is later on used to calculate the contributions, - // i.e. offset and length, of each compile/type unit to a section. - std::vector<std::pair<DWARFSectionKind, uint32_t>> SectionLength; - - for (const auto &Section : Obj.sections()) - if (auto Err = handleSection( - KnownSections, StrSection, StrOffsetSection, TypesSection, - CUIndexSection, TUIndexSection, InfoSection, Section, Out, - UncompressedSections, ContributionOffsets, CurEntry, - CurStrSection, CurStrOffsetSection, CurTypesSection, - CurInfoSection, AbbrevSection, CurCUIndexSection, - CurTUIndexSection, SectionLength)) - return Err; - - if (CurInfoSection.empty()) - continue; - - Expected<InfoSectionUnitHeader> HeaderOrErr = - parseInfoSectionUnitHeader(CurInfoSection.front()); - if (!HeaderOrErr) - return HeaderOrErr.takeError(); - InfoSectionUnitHeader &Header = *HeaderOrErr; - - if (Version == 0) { - Version = Header.Version; - IndexVersion = Version < 5 ? 2 : 5; - } else if (Version != Header.Version) { - return make_error<DWPError>("incompatible DWARF compile unit versions."); - } - - writeStringsAndOffsets(Out, Strings, StrOffsetSection, CurStrSection, - CurStrOffsetSection, Header.Version); - - for (auto Pair : SectionLength) { - auto Index = getContributionIndex(Pair.first, IndexVersion); - CurEntry.Contributions[Index].Offset = ContributionOffsets[Index]; - ContributionOffsets[Index] += - (CurEntry.Contributions[Index].Length = Pair.second); - } - - uint32_t &InfoSectionOffset = - ContributionOffsets[getContributionIndex(DW_SECT_INFO, IndexVersion)]; - if (CurCUIndexSection.empty()) { - bool FoundCUUnit = false; - Out.SwitchSection(InfoSection); - for (StringRef Info : CurInfoSection) { - uint64_t UnitOffset = 0; - while (Info.size() > UnitOffset) { - Expected<InfoSectionUnitHeader> HeaderOrError = - parseInfoSectionUnitHeader(Info.substr(UnitOffset, Info.size())); - if (!HeaderOrError) - return HeaderOrError.takeError(); - InfoSectionUnitHeader &Header = *HeaderOrError; - - UnitIndexEntry Entry = CurEntry; - auto &C = Entry.Contributions[getContributionIndex(DW_SECT_INFO, - IndexVersion)]; - C.Offset = InfoSectionOffset; - C.Length = Header.Length + 4; - UnitOffset += C.Length; - if (Header.Version < 5 || - Header.UnitType == dwarf::DW_UT_split_compile) { - Expected<CompileUnitIdentifiers> EID = - getCUIdentifiers(Header, AbbrevSection, - Info.substr(UnitOffset - C.Length, C.Length), - CurStrOffsetSection, CurStrSection); - - if (!EID) - return createFileError(Input, EID.takeError()); - const auto &ID = *EID; - auto P = IndexEntries.insert(std::make_pair(ID.Signature, Entry)); - if (!P.second) - return buildDuplicateError(*P.first, ID, ""); - P.first->second.Name = ID.Name; - P.first->second.DWOName = ID.DWOName; - - FoundCUUnit = true; - } else if (Header.UnitType == dwarf::DW_UT_split_type) { - auto P = TypeIndexEntries.insert( - std::make_pair(Header.Signature.getValue(), Entry)); - if (!P.second) - continue; - } - Out.emitBytes(Info.substr(UnitOffset - C.Length, C.Length)); - InfoSectionOffset += C.Length; - } - } - - if (!FoundCUUnit) - return make_error<DWPError>("no compile unit found in file: " + Input); - - if (IndexVersion == 2) { - // Add types from the .debug_types section from DWARF < 5. - addAllTypesFromTypesSection( - Out, TypeIndexEntries, TypesSection, CurTypesSection, CurEntry, - ContributionOffsets[getContributionIndex(DW_SECT_EXT_TYPES, 2)]); - } - continue; - } - - if (CurInfoSection.size() != 1) - return make_error<DWPError>("expected exactly one occurrence of a debug " - "info section in a .dwp file"); - StringRef DwpSingleInfoSection = CurInfoSection.front(); - - DWARFUnitIndex CUIndex(DW_SECT_INFO); - DataExtractor CUIndexData(CurCUIndexSection, Obj.isLittleEndian(), 0); - if (!CUIndex.parse(CUIndexData)) - return make_error<DWPError>("failed to parse cu_index"); - if (CUIndex.getVersion() != IndexVersion) - return make_error<DWPError>("incompatible cu_index versions, found " + - utostr(CUIndex.getVersion()) + - " and expecting " + utostr(IndexVersion)); - - Out.SwitchSection(InfoSection); - for (const DWARFUnitIndex::Entry &E : CUIndex.getRows()) { - auto *I = E.getContributions(); - if (!I) - continue; - auto P = IndexEntries.insert(std::make_pair(E.getSignature(), CurEntry)); - StringRef CUInfoSection = - getSubsection(DwpSingleInfoSection, E, DW_SECT_INFO); - Expected<InfoSectionUnitHeader> HeaderOrError = - parseInfoSectionUnitHeader(CUInfoSection); - if (!HeaderOrError) - return HeaderOrError.takeError(); - InfoSectionUnitHeader &Header = *HeaderOrError; - - Expected<CompileUnitIdentifiers> EID = getCUIdentifiers( - Header, getSubsection(AbbrevSection, E, DW_SECT_ABBREV), - CUInfoSection, - getSubsection(CurStrOffsetSection, E, DW_SECT_STR_OFFSETS), - CurStrSection); - if (!EID) - return createFileError(Input, EID.takeError()); - const auto &ID = *EID; - if (!P.second) - return buildDuplicateError(*P.first, ID, Input); - auto &NewEntry = P.first->second; - NewEntry.Name = ID.Name; - NewEntry.DWOName = ID.DWOName; - NewEntry.DWPName = Input; - for (auto Kind : CUIndex.getColumnKinds()) { - if (!isSupportedSectionKind(Kind)) - continue; - auto &C = - NewEntry.Contributions[getContributionIndex(Kind, IndexVersion)]; - C.Offset += I->Offset; - C.Length = I->Length; - ++I; - } - unsigned Index = getContributionIndex(DW_SECT_INFO, IndexVersion); - auto &C = NewEntry.Contributions[Index]; - Out.emitBytes(CUInfoSection); - C.Offset = InfoSectionOffset; - InfoSectionOffset += C.Length; - } - - if (!CurTUIndexSection.empty()) { - llvm::DWARFSectionKind TUSectionKind; - MCSection *OutSection; - StringRef TypeInputSection; - // Write type units into debug info section for DWARFv5. - if (Version >= 5) { - TUSectionKind = DW_SECT_INFO; - OutSection = InfoSection; - TypeInputSection = DwpSingleInfoSection; - } else { - // Write type units into debug types section for DWARF < 5. - if (CurTypesSection.size() != 1) - return make_error<DWPError>( - "multiple type unit sections in .dwp file"); - - TUSectionKind = DW_SECT_EXT_TYPES; - OutSection = TypesSection; - TypeInputSection = CurTypesSection.front(); - } - - DWARFUnitIndex TUIndex(TUSectionKind); - DataExtractor TUIndexData(CurTUIndexSection, Obj.isLittleEndian(), 0); - if (!TUIndex.parse(TUIndexData)) - return make_error<DWPError>("failed to parse tu_index"); - if (TUIndex.getVersion() != IndexVersion) - return make_error<DWPError>("incompatible tu_index versions, found " + - utostr(TUIndex.getVersion()) + - " and expecting " + utostr(IndexVersion)); - - unsigned TypesContributionIndex = - getContributionIndex(TUSectionKind, IndexVersion); - addAllTypesFromDWP(Out, TypeIndexEntries, TUIndex, OutSection, - TypeInputSection, CurEntry, - ContributionOffsets[TypesContributionIndex], - TypesContributionIndex); - } - } - - if (Version < 5) { - // Lie about there being no info contributions so the TU index only includes - // the type unit contribution for DWARF < 5. In DWARFv5 the TU index has a - // contribution to the info section, so we do not want to lie about it. - ContributionOffsets[0] = 0; - } - writeIndex(Out, MCOFI.getDwarfTUIndexSection(), ContributionOffsets, - TypeIndexEntries, IndexVersion); - - if (Version < 5) { - // Lie about the type contribution for DWARF < 5. In DWARFv5 the type - // section does not exist, so no need to do anything about this. - ContributionOffsets[getContributionIndex(DW_SECT_EXT_TYPES, 2)] = 0; - // Unlie about the info contribution - ContributionOffsets[0] = 1; - } - - writeIndex(Out, MCOFI.getDwarfCUIndexSection(), ContributionOffsets, - IndexEntries, IndexVersion); - - return Error::success(); -} - static int error(const Twine &Error, const Twine &Context) { errs() << Twine("while processing ") + Context + ":\n"; errs() << Twine("error: ") + Error + "\n"; |