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-rw-r--r--llvm/lib/DWARFLinkerParallel/DWARFEmitterImpl.cpp131
-rw-r--r--llvm/lib/DWARFLinkerParallel/DWARFEmitterImpl.h274
-rw-r--r--llvm/lib/DWARFLinkerParallel/DWARFLinker.cpp12
-rw-r--r--llvm/lib/DWARFLinkerParallel/DWARFLinkerCompileUnit.h156
-rw-r--r--llvm/lib/DWARFLinkerParallel/DWARFLinkerImpl.cpp46
-rw-r--r--llvm/lib/DWARFLinkerParallel/DWARFLinkerImpl.h319
-rw-r--r--llvm/lib/DWARFLinkerParallel/DWARFLinkerUnit.h186
-rw-r--r--llvm/lib/DWARFLinkerParallel/OutputSections.cpp36
-rw-r--r--llvm/lib/DWARFLinkerParallel/OutputSections.h67
-rw-r--r--llvm/lib/DWARFLinkerParallel/StringPool.cpp9
10 files changed, 1232 insertions, 4 deletions
diff --git a/llvm/lib/DWARFLinkerParallel/DWARFEmitterImpl.cpp b/llvm/lib/DWARFLinkerParallel/DWARFEmitterImpl.cpp
new file mode 100644
index 000000000000..50909c0ba669
--- /dev/null
+++ b/llvm/lib/DWARFLinkerParallel/DWARFEmitterImpl.cpp
@@ -0,0 +1,131 @@
+//===- DWARFEmitterImpl.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 "DWARFEmitterImpl.h"
+#include "llvm/DWARFLinker/DWARFLinkerCompileUnit.h"
+#include "llvm/MC/MCAsmBackend.h"
+#include "llvm/MC/MCCodeEmitter.h"
+#include "llvm/MC/MCObjectWriter.h"
+#include "llvm/MC/MCSubtargetInfo.h"
+#include "llvm/MC/MCTargetOptions.h"
+#include "llvm/MC/MCTargetOptionsCommandFlags.h"
+#include "llvm/MC/TargetRegistry.h"
+#include "llvm/Support/FormattedStream.h"
+
+namespace llvm {
+namespace dwarflinker_parallel {
+
+Error DwarfEmitterImpl::init(Triple TheTriple,
+ StringRef Swift5ReflectionSegmentName) {
+ std::string ErrorStr;
+ std::string TripleName;
+
+ // Get the target.
+ const Target *TheTarget =
+ TargetRegistry::lookupTarget(TripleName, TheTriple, ErrorStr);
+ if (!TheTarget)
+ return createStringError(std::errc::invalid_argument, ErrorStr.c_str());
+ TripleName = TheTriple.getTriple();
+
+ // Create all the MC Objects.
+ MRI.reset(TheTarget->createMCRegInfo(TripleName));
+ if (!MRI)
+ return createStringError(std::errc::invalid_argument,
+ "no register info for target %s",
+ TripleName.c_str());
+
+ MCTargetOptions MCOptions = mc::InitMCTargetOptionsFromFlags();
+ MAI.reset(TheTarget->createMCAsmInfo(*MRI, TripleName, MCOptions));
+ if (!MAI)
+ return createStringError(std::errc::invalid_argument,
+ "no asm info for target %s", TripleName.c_str());
+
+ MSTI.reset(TheTarget->createMCSubtargetInfo(TripleName, "", ""));
+ if (!MSTI)
+ return createStringError(std::errc::invalid_argument,
+ "no subtarget info for target %s",
+ TripleName.c_str());
+
+ MC.reset(new MCContext(TheTriple, MAI.get(), MRI.get(), MSTI.get(), nullptr,
+ nullptr, true, Swift5ReflectionSegmentName));
+ MOFI.reset(TheTarget->createMCObjectFileInfo(*MC, /*PIC=*/false, false));
+ MC->setObjectFileInfo(MOFI.get());
+
+ MAB = TheTarget->createMCAsmBackend(*MSTI, *MRI, MCOptions);
+ if (!MAB)
+ return createStringError(std::errc::invalid_argument,
+ "no asm backend for target %s",
+ TripleName.c_str());
+
+ MII.reset(TheTarget->createMCInstrInfo());
+ if (!MII)
+ return createStringError(std::errc::invalid_argument,
+ "no instr info info for target %s",
+ TripleName.c_str());
+
+ MCE = TheTarget->createMCCodeEmitter(*MII, *MC);
+ if (!MCE)
+ return createStringError(std::errc::invalid_argument,
+ "no code emitter for target %s",
+ TripleName.c_str());
+
+ switch (OutFileType) {
+ case DWARFLinker::OutputFileType::Assembly: {
+ MIP = TheTarget->createMCInstPrinter(TheTriple, MAI->getAssemblerDialect(),
+ *MAI, *MII, *MRI);
+ MS = TheTarget->createAsmStreamer(
+ *MC, std::make_unique<formatted_raw_ostream>(OutFile), true, true, MIP,
+ std::unique_ptr<MCCodeEmitter>(MCE), std::unique_ptr<MCAsmBackend>(MAB),
+ true);
+ break;
+ }
+ case DWARFLinker::OutputFileType::Object: {
+ MS = TheTarget->createMCObjectStreamer(
+ TheTriple, *MC, std::unique_ptr<MCAsmBackend>(MAB),
+ MAB->createObjectWriter(OutFile), std::unique_ptr<MCCodeEmitter>(MCE),
+ *MSTI, MCOptions.MCRelaxAll, MCOptions.MCIncrementalLinkerCompatible,
+ /*DWARFMustBeAtTheEnd*/ false);
+ break;
+ }
+ }
+
+ if (!MS)
+ return createStringError(std::errc::invalid_argument,
+ "no object streamer for target %s",
+ TripleName.c_str());
+
+ // Finally create the AsmPrinter we'll use to emit the DIEs.
+ TM.reset(TheTarget->createTargetMachine(TripleName, "", "", TargetOptions(),
+ std::nullopt));
+ if (!TM)
+ return createStringError(std::errc::invalid_argument,
+ "no target machine for target %s",
+ TripleName.c_str());
+
+ Asm.reset(TheTarget->createAsmPrinter(*TM, std::unique_ptr<MCStreamer>(MS)));
+ if (!Asm)
+ return createStringError(std::errc::invalid_argument,
+ "no asm printer for target %s",
+ TripleName.c_str());
+ Asm->setDwarfUsesRelocationsAcrossSections(false);
+
+ RangesSectionSize = 0;
+ RngListsSectionSize = 0;
+ LocSectionSize = 0;
+ LocListsSectionSize = 0;
+ LineSectionSize = 0;
+ FrameSectionSize = 0;
+ DebugInfoSectionSize = 0;
+ MacInfoSectionSize = 0;
+ MacroSectionSize = 0;
+
+ return Error::success();
+}
+
+} // end of namespace dwarflinker_parallel
+} // namespace llvm
diff --git a/llvm/lib/DWARFLinkerParallel/DWARFEmitterImpl.h b/llvm/lib/DWARFLinkerParallel/DWARFEmitterImpl.h
new file mode 100644
index 000000000000..d07397a30419
--- /dev/null
+++ b/llvm/lib/DWARFLinkerParallel/DWARFEmitterImpl.h
@@ -0,0 +1,274 @@
+//===- DwarfEmitterImpl.h ---------------------------------------*- C++ -*-===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIB_DWARFLINKERPARALLEL_DWARFEMITTERIMPL_H
+#define LLVM_LIB_DWARFLINKERPARALLEL_DWARFEMITTERIMPL_H
+
+#include "DWARFLinkerCompileUnit.h"
+#include "llvm/BinaryFormat/Swift.h"
+#include "llvm/CodeGen/AccelTable.h"
+#include "llvm/CodeGen/AsmPrinter.h"
+#include "llvm/DWARFLinkerParallel/DWARFLinker.h"
+#include "llvm/DWARFLinkerParallel/StringTable.h"
+#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCInstrInfo.h"
+#include "llvm/MC/MCObjectFileInfo.h"
+#include "llvm/MC/MCRegisterInfo.h"
+#include "llvm/MC/MCStreamer.h"
+#include "llvm/MC/MCSubtargetInfo.h"
+#include "llvm/Target/TargetMachine.h"
+
+namespace llvm {
+
+/// User of DwarfEmitterImpl should call initialization code
+/// for AsmPrinter:
+///
+/// InitializeAllTargetInfos();
+/// InitializeAllTargetMCs();
+/// InitializeAllTargets();
+/// InitializeAllAsmPrinters();
+
+template <typename DataT> class AccelTable;
+class MCCodeEmitter;
+class DWARFDebugMacro;
+
+namespace dwarflinker_parallel {
+
+struct UnitStartSymbol {
+ unsigned UnitID = 0;
+ MCSymbol *Symbol = 0;
+};
+using UnitStartSymbolsTy = SmallVector<UnitStartSymbol>;
+using Offset2UnitMapTy = DenseMap<uint64_t, CompileUnit *>;
+
+struct RangeAttrPatch;
+struct LocAttrPatch;
+
+/// The Dwarf emission logic.
+///
+/// All interactions with the MC layer that is used to build the debug
+/// information binary representation are handled in this class.
+class DwarfEmitterImpl : public ExtraDwarfEmitter {
+public:
+ DwarfEmitterImpl(DWARFLinker::OutputFileType OutFileType,
+ raw_pwrite_stream &OutFile,
+ std::function<StringRef(StringRef Input)> Translator,
+ DWARFLinker::MessageHandlerTy Warning)
+ : OutFile(OutFile), OutFileType(OutFileType), Translator(Translator),
+ WarningHandler(Warning) {}
+
+ Error init(Triple TheTriple, StringRef Swift5ReflectionSegmentName);
+
+ /// Dump the file to the disk.
+ void finish() override { MS->finish(); }
+
+ AsmPrinter &getAsmPrinter() const override { return *Asm; }
+
+ /// Set the current output section to debug_info and change
+ /// the MC Dwarf version to \p DwarfVersion.
+ void switchToDebugInfoSection(unsigned DwarfVersion) {}
+
+ /// Emit the swift_ast section stored in \p Buffer.
+ void emitSwiftAST(StringRef Buffer) override {}
+
+ /// Emit the swift reflection section stored in \p Buffer.
+ void emitSwiftReflectionSection(
+ llvm::binaryformat::Swift5ReflectionSectionKind ReflSectionKind,
+ StringRef Buffer, uint32_t Alignment, uint32_t Size) override {}
+
+ void emitPaperTrailWarningsDie(DIE &Die) {}
+
+ void emitSectionContents(StringRef SecData, StringRef SecName) override {}
+
+ MCSymbol *emitTempSym(StringRef SecName, StringRef SymName) override {
+ return nullptr;
+ }
+
+ void emitAbbrevs(const SmallVector<std::unique_ptr<DIEAbbrev>> &Abbrevs,
+ unsigned DwarfVersion) {}
+
+ void emitStrings(const StringTable &Strings) {}
+
+ void emitLineStrings(const StringTable &Strings) {}
+
+ void emitDebugNames(AccelTable<DWARF5AccelTableStaticData> &,
+ UnitStartSymbolsTy &UnitOffsets) {}
+
+ void emitAppleNamespaces(AccelTable<AppleAccelTableStaticOffsetData> &) {}
+
+ void emitAppleNames(AccelTable<AppleAccelTableStaticOffsetData> &) {}
+
+ void emitAppleObjc(AccelTable<AppleAccelTableStaticOffsetData> &) {}
+
+ void emitAppleTypes(AccelTable<AppleAccelTableStaticTypeData> &) {}
+
+ MCSymbol *emitDwarfDebugRangeListHeader(const CompileUnit &Unit) {
+ return nullptr;
+ }
+
+ void emitDwarfDebugRangeListFragment(const CompileUnit &Unit,
+ const AddressRanges &LinkedRanges,
+ RangeAttrPatch &Patch) {}
+
+ void emitDwarfDebugRangeListFooter(const CompileUnit &Unit,
+ MCSymbol *EndLabel) {}
+
+ MCSymbol *emitDwarfDebugLocListHeader(const CompileUnit &Unit) {
+ return nullptr;
+ }
+
+ void emitDwarfDebugLocListFragment(
+ const CompileUnit &Unit,
+ const DWARFLocationExpressionsVector &LinkedLocationExpression,
+ LocAttrPatch &Patch) {}
+
+ void emitDwarfDebugLocListFooter(const CompileUnit &Unit,
+ MCSymbol *EndLabel) {}
+
+ void emitDwarfDebugArangesTable(const CompileUnit &Unit,
+ const AddressRanges &LinkedRanges) {}
+
+ void translateLineTable(DataExtractor LineData, uint64_t Offset) {}
+
+ void emitLineTableForUnit(MCDwarfLineTableParams Params,
+ StringRef PrologueBytes, unsigned MinInstLength,
+ std::vector<DWARFDebugLine::Row> &Rows,
+ unsigned AdddressSize) {}
+
+ void emitLineTableForUnit(const DWARFDebugLine::LineTable &LineTable,
+ const CompileUnit &Unit, const StringTable &Strings,
+ const StringTable &LineTableStrings) {}
+
+ void emitPubNamesForUnit(const CompileUnit &Unit) {}
+
+ void emitPubTypesForUnit(const CompileUnit &Unit) {}
+
+ void emitCIE(StringRef CIEBytes) {}
+
+ void emitFDE(uint32_t CIEOffset, uint32_t AddreSize, uint64_t Address,
+ StringRef Bytes) {}
+
+ void emitCompileUnitHeader(CompileUnit &Unit, unsigned DwarfVersion) {}
+
+ void emitDIE(DIE &Die) {}
+
+ void emitMacroTables(DWARFContext *Context,
+ const Offset2UnitMapTy &UnitMacroMap,
+ StringTable &Strings) {}
+
+ /// Returns size of generated .debug_line section.
+ uint64_t getDebugLineSectionSize() const { return LineSectionSize; }
+
+ /// Returns size of generated .debug_frame section.
+ uint64_t getDebugFrameSectionSize() const { return FrameSectionSize; }
+
+ /// Returns size of generated .debug_ranges section.
+ uint64_t getDebugRangesSectionSize() const { return RangesSectionSize; }
+
+ /// Returns size of generated .debug_rnglists section.
+ uint64_t getDebugRngListsSectionSize() const { return RngListsSectionSize; }
+
+ /// Returns size of generated .debug_info section.
+ uint64_t getDebugInfoSectionSize() const { return DebugInfoSectionSize; }
+
+ /// Returns size of generated .debug_macinfo section.
+ uint64_t getDebugMacInfoSectionSize() const { return MacInfoSectionSize; }
+
+ /// Returns size of generated .debug_macro section.
+ uint64_t getDebugMacroSectionSize() const { return MacroSectionSize; }
+
+ /// Returns size of generated .debug_loc section.
+ uint64_t getDebugLocSectionSize() const { return LocSectionSize; }
+
+ /// Returns size of generated .debug_loclists section.
+ uint64_t getDebugLocListsSectionSize() const { return LocListsSectionSize; }
+
+private:
+ inline void warn(const Twine &Warning, StringRef Context = "") {
+ if (WarningHandler)
+ WarningHandler(Warning, Context, nullptr);
+ }
+
+ void emitMacroTableImpl(const DWARFDebugMacro *MacroTable,
+ const Offset2UnitMapTy &UnitMacroMap,
+ StringPool &StringPool, uint64_t &OutOffset) {}
+
+ /// Emit piece of .debug_ranges for \p LinkedRanges.
+ void emitDwarfDebugRangesTableFragment(const CompileUnit &Unit,
+ const AddressRanges &LinkedRanges,
+ RangeAttrPatch &Patch) {}
+
+ /// Emit piece of .debug_rnglists for \p LinkedRanges.
+ void emitDwarfDebugRngListsTableFragment(const CompileUnit &Unit,
+ const AddressRanges &LinkedRanges,
+ RangeAttrPatch &Patch) {}
+
+ /// Emit piece of .debug_loc for \p LinkedRanges.
+ void emitDwarfDebugLocTableFragment(
+ const CompileUnit &Unit,
+ const DWARFLocationExpressionsVector &LinkedLocationExpression,
+ LocAttrPatch &Patch) {}
+
+ /// Emit piece of .debug_loclists for \p LinkedRanges.
+ void emitDwarfDebugLocListsTableFragment(
+ const CompileUnit &Unit,
+ const DWARFLocationExpressionsVector &LinkedLocationExpression,
+ LocAttrPatch &Patch) {}
+
+ /// \defgroup MCObjects MC layer objects constructed by the streamer
+ /// @{
+ std::unique_ptr<MCRegisterInfo> MRI;
+ std::unique_ptr<MCAsmInfo> MAI;
+ std::unique_ptr<MCObjectFileInfo> MOFI;
+ std::unique_ptr<MCContext> MC;
+ MCAsmBackend *MAB; // Owned by MCStreamer
+ std::unique_ptr<MCInstrInfo> MII;
+ std::unique_ptr<MCSubtargetInfo> MSTI;
+ MCInstPrinter *MIP; // Owned by AsmPrinter
+ MCCodeEmitter *MCE; // Owned by MCStreamer
+ MCStreamer *MS; // Owned by AsmPrinter
+ std::unique_ptr<TargetMachine> TM;
+ std::unique_ptr<AsmPrinter> Asm;
+ /// @}
+
+ /// The output file we stream the linked Dwarf to.
+ raw_pwrite_stream &OutFile;
+ DWARFLinker::OutputFileType OutFileType = DWARFLinker::OutputFileType::Object;
+ std::function<StringRef(StringRef Input)> Translator;
+
+ uint64_t RangesSectionSize = 0;
+ uint64_t RngListsSectionSize = 0;
+ uint64_t LocSectionSize = 0;
+ uint64_t LocListsSectionSize = 0;
+ uint64_t LineSectionSize = 0;
+ uint64_t FrameSectionSize = 0;
+ uint64_t DebugInfoSectionSize = 0;
+ uint64_t MacInfoSectionSize = 0;
+ uint64_t MacroSectionSize = 0;
+
+ /// Keep track of emitted CUs and their Unique ID.
+ struct EmittedUnit {
+ unsigned ID;
+ MCSymbol *LabelBegin;
+ };
+ std::vector<EmittedUnit> EmittedUnitsTy;
+
+ /// Emit the pubnames or pubtypes section contribution for \p
+ /// Unit into \p Sec. The data is provided in \p Names.
+ void emitPubSectionForUnit(MCSection *Sec, StringRef Name,
+ const CompileUnit &Unit,
+ const std::vector<CompileUnit::AccelInfo> &Names);
+
+ DWARFLinker::MessageHandlerTy WarningHandler = nullptr;
+};
+
+} // end namespace dwarflinker_parallel
+} // end namespace llvm
+
+#endif // LLVM_LIB_DWARFLINKERPARALLEL_DWARFEMITTERIMPL_H
diff --git a/llvm/lib/DWARFLinkerParallel/DWARFLinker.cpp b/llvm/lib/DWARFLinkerParallel/DWARFLinker.cpp
index a54d2e3cc281..f082fd603610 100644
--- a/llvm/lib/DWARFLinkerParallel/DWARFLinker.cpp
+++ b/llvm/lib/DWARFLinkerParallel/DWARFLinker.cpp
@@ -6,8 +6,12 @@
//
//===----------------------------------------------------------------------===//
-#include "llvm/DWARFLinkerParallel/DWARFLinker.h"
+#include "DWARFLinkerImpl.h"
-namespace llvm {
-namespace dwarflinker_parallel {} // end of namespace dwarflinker_parallel
-} // namespace llvm
+std::unique_ptr<llvm::dwarflinker_parallel::DWARFLinker>
+llvm::dwarflinker_parallel::DWARFLinker::createLinker(
+ MessageHandlerTy ErrorHandler, MessageHandlerTy WarningHandler,
+ TranslatorFuncTy StringsTranslator) {
+ return std::make_unique<DWARFLinkerImpl>(ErrorHandler, WarningHandler,
+ StringsTranslator);
+}
diff --git a/llvm/lib/DWARFLinkerParallel/DWARFLinkerCompileUnit.h b/llvm/lib/DWARFLinkerParallel/DWARFLinkerCompileUnit.h
new file mode 100644
index 000000000000..1617a848512d
--- /dev/null
+++ b/llvm/lib/DWARFLinkerParallel/DWARFLinkerCompileUnit.h
@@ -0,0 +1,156 @@
+//===- DWARFLinkerCompileUnit.h ---------------------------------*- C++ -*-===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIB_DWARFLINKERPARALLEL_DWARFLINKERCOMPILEUNIT_H
+#define LLVM_LIB_DWARFLINKERPARALLEL_DWARFLINKERCOMPILEUNIT_H
+
+#include "DWARFLinkerUnit.h"
+#include "llvm/DWARFLinkerParallel/DWARFFile.h"
+#include "llvm/DWARFLinkerParallel/DWARFLinker.h"
+#include <optional>
+
+namespace llvm {
+namespace dwarflinker_parallel {
+
+struct LinkContext;
+class DWARFFile;
+
+/// Stores all information related to a compile unit, be it in its original
+/// instance of the object file or its brand new cloned and generated DIE tree.
+class CompileUnit : public DwarfUnit {
+public:
+ CompileUnit(LinkContext &, unsigned ID, StringRef ClangModuleName,
+ DWARFFile &File,
+ DWARFLinker::SwiftInterfacesMapTy *,
+ UnitMessageHandlerTy WarningHandler)
+ : DwarfUnit(ID, ClangModuleName, WarningHandler), ContaingFile(File) {
+ FormParams.Version = 4;
+ FormParams.Format = dwarf::DWARF32;
+ FormParams.AddrSize = 4;
+ UnitName = ContaingFile.FileName;
+ }
+
+ CompileUnit(LinkContext &, DWARFUnit &OrigUnit, unsigned ID,
+ StringRef ClangModuleName, DWARFFile &File,
+ UnitMessageHandlerTy WarningHandler)
+ : DwarfUnit(ID, ClangModuleName, WarningHandler),
+ ContaingFile(File), OrigUnit(&OrigUnit) {
+ DWARFDie CUDie = OrigUnit.getUnitDIE();
+ if (!CUDie)
+ return;
+
+ if (File.Dwarf)
+ Endianess = File.Dwarf->isLittleEndian() ? support::endianness::little
+ : support::endianness::big;
+
+ FormParams.Version = OrigUnit.getVersion();
+ FormParams.Format = dwarf::DWARF32;
+ FormParams.AddrSize = OrigUnit.getAddressByteSize();
+
+ Language = dwarf::toUnsigned(CUDie.find(dwarf::DW_AT_language), 0);
+
+ UnitName = ContaingFile.FileName;
+ SysRoot = dwarf::toStringRef(CUDie.find(dwarf::DW_AT_LLVM_sysroot)).str();
+ }
+
+ /// \defgroup Helper methods to access OrigUnit.
+ ///
+ /// @{
+
+ /// Returns paired compile unit from input DWARF.
+ DWARFUnit &getOrigUnit() const {
+ assert(OrigUnit != nullptr);
+ return *OrigUnit;
+ }
+
+ const DWARFDebugInfoEntry *
+ getFirstChildEntry(const DWARFDebugInfoEntry *Die) const {
+ assert(OrigUnit != nullptr);
+ return OrigUnit->getFirstChildEntry(Die);
+ }
+
+ const DWARFDebugInfoEntry *
+ getSiblingEntry(const DWARFDebugInfoEntry *Die) const {
+ assert(OrigUnit != nullptr);
+ return OrigUnit->getSiblingEntry(Die);
+ }
+
+ DWARFDie getParent(const DWARFDebugInfoEntry *Die) {
+ assert(OrigUnit != nullptr);
+ return OrigUnit->getParent(Die);
+ }
+
+ DWARFDie getDIEAtIndex(unsigned Index) {
+ assert(OrigUnit != nullptr);
+ return OrigUnit->getDIEAtIndex(Index);
+ }
+
+ const DWARFDebugInfoEntry *getDebugInfoEntry(unsigned Index) const {
+ assert(OrigUnit != nullptr);
+ return OrigUnit->getDebugInfoEntry(Index);
+ }
+
+ DWARFDie getUnitDIE(bool ExtractUnitDIEOnly = true) {
+ assert(OrigUnit != nullptr);
+ return OrigUnit->getUnitDIE(ExtractUnitDIEOnly);
+ }
+
+ DWARFDie getDIE(const DWARFDebugInfoEntry *Die) {
+ assert(OrigUnit != nullptr);
+ return DWARFDie(OrigUnit, Die);
+ }
+
+ uint32_t getDIEIndex(const DWARFDebugInfoEntry *Die) const {
+ assert(OrigUnit != nullptr);
+ return OrigUnit->getDIEIndex(Die);
+ }
+
+ uint32_t getDIEIndex(const DWARFDie &Die) const {
+ assert(OrigUnit != nullptr);
+ return OrigUnit->getDIEIndex(Die);
+ }
+
+ std::optional<DWARFFormValue> find(uint32_t DieIdx,
+ ArrayRef<dwarf::Attribute> Attrs) const {
+ assert(OrigUnit != nullptr);
+ return find(OrigUnit->getDebugInfoEntry(DieIdx), Attrs);
+ }
+
+ std::optional<DWARFFormValue> find(const DWARFDebugInfoEntry *Die,
+ ArrayRef<dwarf::Attribute> Attrs) const {
+ if (!Die)
+ return std::nullopt;
+ auto AbbrevDecl = Die->getAbbreviationDeclarationPtr();
+ if (AbbrevDecl) {
+ for (auto Attr : Attrs) {
+ if (auto Value = AbbrevDecl->getAttributeValue(Die->getOffset(), Attr,
+ *OrigUnit))
+ return Value;
+ }
+ }
+ return std::nullopt;
+ }
+
+ std::optional<uint32_t> getDIEIndexForOffset(uint64_t Offset) {
+ return OrigUnit->getDIEIndexForOffset(Offset);
+ }
+
+ /// @}
+
+private:
+ /// DWARFFile containing this compile unit.
+ DWARFFile &ContaingFile;
+
+ /// Pointer to the paired compile unit from the input DWARF.
+ DWARFUnit *OrigUnit = nullptr;
+};
+
+} // end of namespace dwarflinker_parallel
+} // end namespace llvm
+
+#endif // LLVM_LIB_DWARFLINKERPARALLEL_DWARFLINKERCOMPILEUNIT_H
diff --git a/llvm/lib/DWARFLinkerParallel/DWARFLinkerImpl.cpp b/llvm/lib/DWARFLinkerParallel/DWARFLinkerImpl.cpp
new file mode 100644
index 000000000000..dfd77af92f27
--- /dev/null
+++ b/llvm/lib/DWARFLinkerParallel/DWARFLinkerImpl.cpp
@@ -0,0 +1,46 @@
+//=== DWARFLinkerImpl.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 "DWARFLinkerImpl.h"
+
+namespace llvm {
+namespace dwarflinker_parallel {
+
+/// Similar to DWARFUnitSection::getUnitForOffset(), but returning our
+/// CompileUnit object instead.
+CompileUnit *
+DWARFLinkerImpl::LinkContext::getUnitForOffset(CompileUnit &CurrentCU,
+ uint64_t Offset) const {
+ if (CurrentCU.isClangModule())
+ return &CurrentCU;
+
+ auto CU = llvm::upper_bound(
+ CompileUnits, Offset,
+ [](uint64_t LHS, const std::unique_ptr<CompileUnit> &RHS) {
+ return LHS < RHS->getOrigUnit().getNextUnitOffset();
+ });
+
+ return CU != CompileUnits.end() ? CU->get() : nullptr;
+}
+
+Error DWARFLinkerImpl::createEmitter(const Triple &TheTriple,
+ OutputFileType FileType,
+ raw_pwrite_stream &OutFile) {
+
+ TheDwarfEmitter = std::make_unique<DwarfEmitterImpl>(
+ FileType, OutFile, OutputStrings.getTranslator(), WarningHandler);
+
+ return TheDwarfEmitter->init(TheTriple, "__DWARF");
+}
+
+ExtraDwarfEmitter *DWARFLinkerImpl::getEmitter() {
+ return TheDwarfEmitter.get();
+}
+
+} // end of namespace dwarflinker_parallel
+} // namespace llvm
diff --git a/llvm/lib/DWARFLinkerParallel/DWARFLinkerImpl.h b/llvm/lib/DWARFLinkerParallel/DWARFLinkerImpl.h
new file mode 100644
index 000000000000..a8fa9b4b46d8
--- /dev/null
+++ b/llvm/lib/DWARFLinkerParallel/DWARFLinkerImpl.h
@@ -0,0 +1,319 @@
+//===- DWARFLinkerImpl.h ----------------------------------------*- C++ -*-===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIB_DWARFLINKERPARALLEL_DWARFLINKERIMPL_H
+#define LLVM_LIB_DWARFLINKERPARALLEL_DWARFLINKERIMPL_H
+
+#include "DWARFEmitterImpl.h"
+#include "DWARFLinkerCompileUnit.h"
+#include "llvm/ADT/AddressRanges.h"
+#include "llvm/CodeGen/AccelTable.h"
+#include "llvm/DWARFLinkerParallel/DWARFLinker.h"
+#include "llvm/DWARFLinkerParallel/StringPool.h"
+#include "llvm/DWARFLinkerParallel/StringTable.h"
+
+namespace llvm {
+namespace dwarflinker_parallel {
+
+using Offset2UnitMapTy = DenseMap<uint64_t, CompileUnit *>;
+
+struct RangeAttrPatch;
+struct LocAttrPatch;
+
+class DWARFLinkerImpl : public DWARFLinker {
+public:
+ DWARFLinkerImpl(MessageHandlerTy ErrorHandler,
+ MessageHandlerTy WarningHandler,
+ TranslatorFuncTy StringsTranslator)
+ : UniqueUnitID(0), ErrorHandler(ErrorHandler),
+ WarningHandler(WarningHandler),
+ OutputStrings(Strings, StringsTranslator) {}
+
+ Error createEmitter(const Triple &TheTriple, OutputFileType FileType,
+ raw_pwrite_stream &OutFile) override;
+
+ ExtraDwarfEmitter *getEmitter() override;
+
+ /// Add object file to be linked. Pre-load compile unit die. Call
+ /// \p OnCUDieLoaded for each compile unit die. If specified \p File
+ /// has reference to the Clang module then such module would be
+ /// pre-loaded by \p Loader for !Update case.
+ ///
+ /// \pre NoODR, Update options should be set before call to addObjectFile.
+ void addObjectFile(
+ DWARFFile &File, ObjFileLoaderTy Loader = nullptr,
+ CompileUnitHandlerTy OnCUDieLoaded = [](const DWARFUnit &) {}) override {}
+
+ /// Link debug info for added files.
+ Error link() override {
+ reportWarning("LLVM parallel dwarflinker is not implemented yet.", "");
+ return Error::success();
+ }
+
+ /// \defgroup Methods setting various linking options:
+ ///
+ /// @{
+ ///
+
+ /// Allows to generate log of linking process to the standard output.
+ void setVerbosity(bool Verbose) override { Options.Verbose = Verbose; }
+
+ /// Print statistics to standard output.
+ void setStatistics(bool Statistics) override {
+ Options.Statistics = Statistics;
+ }
+
+ /// Verify the input DWARF.
+ void setVerifyInputDWARF(bool Verify) override {
+ Options.VerifyInputDWARF = Verify;
+ }
+
+ /// Do not unique types according to ODR.
+ void setNoODR(bool NoODR) override { Options.NoODR = NoODR; }
+
+ /// Update index tables only(do not modify rest of DWARF).
+ void setUpdateIndexTablesOnly(bool UpdateIndexTablesOnly) override {
+ Options.UpdateIndexTablesOnly = UpdateIndexTablesOnly;
+ }
+
+ /// Allow generating valid, but non-deterministic output.
+ void
+ setAllowNonDeterministicOutput(bool AllowNonDeterministicOutput) override {
+ Options.AllowNonDeterministicOutput = AllowNonDeterministicOutput;
+ }
+
+ /// Set to keep the enclosing function for a static variable.
+ void setKeepFunctionForStatic(bool KeepFunctionForStatic) override {
+ Options.KeepFunctionForStatic = KeepFunctionForStatic;
+ }
+
+ /// Use specified number of threads for parallel files linking.
+ void setNumThreads(unsigned NumThreads) override {
+ Options.Threads = NumThreads;
+ }
+
+ /// Add kind of accelerator tables to be generated.
+ void addAccelTableKind(AccelTableKind Kind) override {
+ assert(!llvm::is_contained(Options.AccelTables, Kind));
+ Options.AccelTables.emplace_back(Kind);
+ }
+
+ /// Set prepend path for clang modules.
+ void setPrependPath(const std::string &Ppath) override {
+ Options.PrependPath = Ppath;
+ }
+
+ /// Set estimated objects files amount, for preliminary data allocation.
+ void setEstimatedObjfilesAmount(unsigned ObjFilesNum) override {
+ ObjectContexts.reserve(ObjFilesNum);
+ }
+
+ /// Set verification handler which would be used to report verification
+ /// errors.
+ void
+ setInputVerificationHandler(InputVerificationHandlerTy Handler) override {
+ Options.InputVerificationHandler = Handler;
+ }
+
+ /// Set map for Swift interfaces.
+ void setSwiftInterfacesMap(SwiftInterfacesMapTy *Map) override {
+ Options.ParseableSwiftInterfaces = Map;
+ }
+
+ /// Set prefix map for objects.
+ void setObjectPrefixMap(ObjectPrefixMapTy *Map) override {
+ Options.ObjectPrefixMap = Map;
+ }
+
+ /// Set target DWARF version.
+ Error setTargetDWARFVersion(uint16_t TargetDWARFVersion) override {
+ if ((TargetDWARFVersion < 1) || (TargetDWARFVersion > 5))
+ return createStringError(std::errc::invalid_argument,
+ "unsupported DWARF version: %d",
+ TargetDWARFVersion);
+
+ Options.TargetDWARFVersion = TargetDWARFVersion;
+ return Error::success();
+ }
+ /// @}
+
+protected:
+ /// Reports Warning.
+ void reportWarning(const Twine &Warning, const DWARFFile &File,
+ const DWARFDie *DIE = nullptr) const {
+ if (WarningHandler != nullptr)
+ WarningHandler(Warning, File.FileName, DIE);
+ }
+
+ /// Reports Warning.
+ void reportWarning(const Twine &Warning, StringRef FileName,
+ const DWARFDie *DIE = nullptr) const {
+ if (WarningHandler != nullptr)
+ WarningHandler(Warning, FileName, DIE);
+ }
+
+ /// Reports Error.
+ void reportError(const Twine &Warning, StringRef FileName,
+ const DWARFDie *DIE = nullptr) const {
+ if (ErrorHandler != nullptr)
+ ErrorHandler(Warning, FileName, DIE);
+ }
+
+ /// Returns next available unique Compile Unit ID.
+ unsigned getNextUniqueUnitID() { return UniqueUnitID.fetch_add(1); }
+
+ /// Keeps track of data associated with one object during linking.
+ /// i.e. source file descriptor, compilation units, output data
+ /// for compilation units common tables.
+ struct LinkContext : public OutputSections {
+ using UnitListTy = SmallVector<std::unique_ptr<CompileUnit>>;
+
+ /// Keep information for referenced clang module: already loaded DWARF info
+ /// of the clang module and a CompileUnit of the module.
+ struct RefModuleUnit {
+ RefModuleUnit(DWARFFile &File, std::unique_ptr<CompileUnit> Unit)
+ : File(File), Unit(std::move(Unit)) {}
+ RefModuleUnit(RefModuleUnit &&Other)
+ : File(Other.File), Unit(std::move(Other.Unit)) {}
+ RefModuleUnit(const RefModuleUnit &) = delete;
+
+ DWARFFile &File;
+ std::unique_ptr<CompileUnit> Unit;
+ };
+ using ModuleUnitListTy = SmallVector<RefModuleUnit>;
+
+ /// Object file descriptor.
+ DWARFFile &File;
+
+ /// Set of Compilation Units(may be accessed asynchroniously for reading).
+ UnitListTy CompileUnits;
+
+ /// Set of Compile Units for modules.
+ ModuleUnitListTy ModulesCompileUnits;
+
+ /// Size of Debug info before optimizing.
+ uint64_t OriginalDebugInfoSize = 0;
+
+ /// Output sections, common for all compilation units.
+ OutTablesFileTy OutDebugInfoBytes;
+
+ /// Endianness for the final file.
+ support::endianness Endianess = support::endianness::little;
+
+ LinkContext(DWARFFile &File) : File(File) {
+ if (File.Dwarf) {
+ if (!File.Dwarf->compile_units().empty())
+ CompileUnits.reserve(File.Dwarf->getNumCompileUnits());
+
+ Endianess = File.Dwarf->isLittleEndian() ? support::endianness::little
+ : support::endianness::big;
+ }
+ }
+
+ /// Add Compile Unit corresponding to the module.
+ void addModulesCompileUnit(RefModuleUnit &&Unit) {
+ ModulesCompileUnits.emplace_back(std::move(Unit));
+ }
+
+ /// Return Endiannes of the source DWARF information.
+ support::endianness getEndianness() { return Endianess; }
+
+ /// \returns pointer to compilation unit which corresponds \p Offset.
+ CompileUnit *getUnitForOffset(CompileUnit &CU, uint64_t Offset) const;
+ };
+
+ /// linking options
+ struct DWARFLinkerOptions {
+ /// DWARF version for the output.
+ uint16_t TargetDWARFVersion = 0;
+
+ /// Generate processing log to the standard output.
+ bool Verbose = false;
+
+ /// Print statistics.
+ bool Statistics = false;
+
+ /// Verify the input DWARF.
+ bool VerifyInputDWARF = false;
+
+ /// Do not unique types according to ODR
+ bool NoODR = false;
+
+ /// Update index tables.
+ bool UpdateIndexTablesOnly = false;
+
+ /// Whether we want a static variable to force us to keep its enclosing
+ /// function.
+ bool KeepFunctionForStatic = false;
+
+ /// Allow to generate valid, but non deterministic output.
+ bool AllowNonDeterministicOutput = false;
+
+ /// Number of threads.
+ unsigned Threads = 1;
+
+ /// The accelerator table kinds
+ SmallVector<AccelTableKind, 1> AccelTables;
+
+ /// Prepend path for the clang modules.
+ std::string PrependPath;
+
+ /// input verification handler(it might be called asynchronously).
+ InputVerificationHandlerTy InputVerificationHandler = nullptr;
+
+ /// A list of all .swiftinterface files referenced by the debug
+ /// info, mapping Module name to path on disk. The entries need to
+ /// be uniqued and sorted and there are only few entries expected
+ /// per compile unit, which is why this is a std::map.
+ /// this is dsymutil specific fag.
+ ///
+ /// (it might be called asynchronously).
+ SwiftInterfacesMapTy *ParseableSwiftInterfaces = nullptr;
+
+ /// A list of remappings to apply to file paths.
+ ///
+ /// (it might be called asynchronously).
+ ObjectPrefixMapTy *ObjectPrefixMap = nullptr;
+ } Options;
+
+ /// \defgroup Data members accessed asinchroniously.
+ ///
+ /// @{
+
+ /// Unique ID for compile unit.
+ std::atomic<unsigned> UniqueUnitID;
+
+ /// Strings pool. Keeps all strings.
+ StringPool Strings;
+
+ /// error handler(it might be called asynchronously).
+ MessageHandlerTy ErrorHandler = nullptr;
+
+ /// warning handler(it might be called asynchronously).
+ MessageHandlerTy WarningHandler = nullptr;
+ /// @}
+
+ /// \defgroup Data members accessed sequentially.
+ ///
+ /// @{
+
+ /// Set of strings which should be emitted.
+ StringTable OutputStrings;
+
+ /// Keeps all linking contexts.
+ SmallVector<std::unique_ptr<LinkContext>> ObjectContexts;
+
+ /// The emitter of final dwarf file.
+ std::unique_ptr<DwarfEmitterImpl> TheDwarfEmitter;
+ /// @}
+};
+
+} // end namespace dwarflinker_parallel
+} // end namespace llvm
+
+#endif // LLVM_LIB_DWARFLINKERPARALLEL_DWARFLINKERIMPL_H
diff --git a/llvm/lib/DWARFLinkerParallel/DWARFLinkerUnit.h b/llvm/lib/DWARFLinkerParallel/DWARFLinkerUnit.h
new file mode 100644
index 000000000000..78e8d82ea061
--- /dev/null
+++ b/llvm/lib/DWARFLinkerParallel/DWARFLinkerUnit.h
@@ -0,0 +1,186 @@
+//===- DWARFLinkerUnit.h ----------------------------------------*- C++ -*-===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIB_DWARFLINKERPARALLEL_DWARFLINKERUNIT_H
+#define LLVM_LIB_DWARFLINKERPARALLEL_DWARFLINKERUNIT_H
+
+#include "OutputSections.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/CodeGen/DIE.h"
+#include "llvm/DWARFLinkerParallel/StringPool.h"
+#include "llvm/DebugInfo/DWARF/DWARFUnit.h"
+#include "llvm/Support/LEB128.h"
+
+namespace llvm {
+namespace dwarflinker_parallel {
+
+using UnitMessageHandlerTy = function_ref<void(
+ const Twine &Error, StringRef Context, const DWARFDie *DIE)>;
+
+/// Each unit keeps output data as a file with debug tables
+/// corresponding to the concrete unit.
+using OutTablesFileTy = SmallString<0>;
+
+/// Base class for all Dwarf units(Compile unit/Type table unit).
+class DwarfUnit : public OutputSections {
+public:
+ virtual ~DwarfUnit() {}
+ DwarfUnit(unsigned ID, StringRef ClangModuleName,
+ UnitMessageHandlerTy WarningHandler)
+ : ID(ID), ClangModuleName(ClangModuleName),
+ WarningHandler(WarningHandler) {
+ FormParams.Version = 4;
+ FormParams.Format = dwarf::DWARF32;
+ FormParams.AddrSize = 4;
+ }
+
+ /// Endiannes for the compile unit.
+ support::endianness getEndianness() const { return Endianess; }
+
+ /// Return DWARF version.
+ uint16_t getVersion() const { return FormParams.Version; }
+
+ /// Return size of header of debug_info table.
+ uint16_t getHeaderSize() const { return FormParams.Version >= 5 ? 12 : 11; }
+
+ /// Return size of address.
+ uint8_t getAddressByteSize() const { return FormParams.AddrSize; }
+
+ /// Return size of reference.
+ uint8_t getRefAddrByteSize() const { return FormParams.getRefAddrByteSize(); }
+
+ /// Return format of the Dwarf(DWARF32 or DWARF64).
+ /// TODO: DWARF64 is not currently supported.
+ dwarf::DwarfFormat getDwarfFormat() const { return FormParams.Format; }
+
+ /// Unique id of the unit.
+ unsigned getUniqueID() const { return ID; }
+
+ /// Return language of this unit.
+ uint16_t getLanguage() const { return Language; }
+
+ /// Set size of this(newly generated) compile unit.
+ void setUnitSize(uint64_t UnitSize) { this->UnitSize = UnitSize; }
+
+ /// Returns size of this(newly generated) compile unit.
+ uint64_t getUnitSize() const { return UnitSize; }
+
+ /// Returns this unit name.
+ StringRef getUnitName() const { return UnitName; }
+
+ /// Return the DW_AT_LLVM_sysroot of the compile unit or an empty StringRef.
+ StringRef getSysRoot() { return SysRoot; }
+
+ /// Create a Die for this unit.
+ void setOutputDIE(DIE *UnitDie) { NewUnit = UnitDie; }
+
+ /// Return Die for this compile unit.
+ DIE *getOutputUnitDIE() const { return NewUnit; }
+
+ /// Return true if this compile unit is from Clang module.
+ bool isClangModule() const { return !ClangModuleName.empty(); }
+
+ /// Return Clang module name;
+ const std::string &getClangModuleName() const { return ClangModuleName; }
+
+ /// Returns generated file keeping debug tables for this compile unit.
+ OutTablesFileTy &getOutDwarfBits() { return OutDebugInfoBits; }
+
+ /// Erases generated file keeping debug tables for this compile unit.
+ void eraseDwarfBits() { OutDebugInfoBits = OutTablesFileTy(); }
+
+ MCSymbol *getLabelBegin() { return LabelBegin; }
+ void setLabelBegin(MCSymbol *S) { LabelBegin = S; }
+
+ /// Error reporting methods.
+ /// @{
+
+ void reportWarning(const Twine &Warning,
+ const DWARFDie *Die = nullptr) const {
+ if (WarningHandler)
+ WarningHandler(Warning, getUnitName(), Die);
+ }
+ void reportWarning(Error Warning) const {
+ handleAllErrors(std::move(Warning), [&](ErrorInfoBase &Info) {
+ if (WarningHandler)
+ WarningHandler(Info.message(), getUnitName(), nullptr);
+ });
+ }
+ /// @}
+
+ /// This structure keeps fields which would be used for creating accelerator
+ /// table.
+ struct AccelInfo {
+ AccelInfo(StringEntry *Name, const DIE *Die, bool SkipPubSection = false);
+ AccelInfo(StringEntry *Name, const DIE *Die, uint32_t QualifiedNameHash,
+ bool ObjCClassIsImplementation);
+
+ /// Name of the entry.
+ StringEntry *Name = nullptr;
+
+ /// Tag of the DIE this entry describes.
+ dwarf::Tag Tag = dwarf::DW_TAG_null;
+
+ /// Output offset of the DIE this entry describes.
+ uint64_t OutOffset = 0;
+
+ /// Hash of the fully qualified name.
+ uint32_t QualifiedNameHash = 0;
+
+ /// Emit this entry only in the apple_* sections.
+ bool SkipPubSection = false;
+
+ /// Is this an ObjC class implementation?
+ bool ObjcClassImplementation = false;
+
+ /// Cloned Die containing acceleration info.
+ const DIE *Die = nullptr;
+ };
+
+protected:
+ /// Unique ID for the unit.
+ unsigned ID = 0;
+
+ /// Properties of the unit.
+ dwarf::FormParams FormParams;
+
+ /// DIE for newly generated compile unit.
+ DIE *NewUnit = nullptr;
+
+ /// The DW_AT_language of this unit.
+ uint16_t Language = 0;
+
+ /// The name of this unit.
+ std::string UnitName;
+
+ /// The DW_AT_LLVM_sysroot of this unit.
+ std::string SysRoot;
+
+ /// If this is a Clang module, this holds the module's name.
+ std::string ClangModuleName;
+
+ uint64_t UnitSize = 0;
+
+ /// Elf file containg generated debug tables for this compile unit.
+ OutTablesFileTy OutDebugInfoBits;
+
+ /// Endiannes for this compile unit.
+ support::endianness Endianess = support::endianness::little;
+
+ MCSymbol *LabelBegin = nullptr;
+
+ /// true if current unit references_to/is_referenced by other unit.
+ std::atomic<bool> IsInterconnectedCU = {false};
+
+ UnitMessageHandlerTy WarningHandler;
+};
+
+} // end of namespace dwarflinker_parallel
+} // end namespace llvm
+
+#endif // LLVM_LIB_DWARFLINKERPARALLEL_DWARFLINKERUNIT_H
diff --git a/llvm/lib/DWARFLinkerParallel/OutputSections.cpp b/llvm/lib/DWARFLinkerParallel/OutputSections.cpp
new file mode 100644
index 000000000000..69c5bfaa7bdf
--- /dev/null
+++ b/llvm/lib/DWARFLinkerParallel/OutputSections.cpp
@@ -0,0 +1,36 @@
+//=== OutputSections.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 "OutputSections.h"
+#include "llvm/ADT/StringSwitch.h"
+
+namespace llvm {
+namespace dwarflinker_parallel {
+
+std::optional<OutputSections::DebugSectionKind>
+OutputSections::parseDebugSectionName(llvm::StringRef SecName) {
+ return llvm::StringSwitch<std::optional<OutputSections::DebugSectionKind>>(
+ SecName)
+ .Case("debug_info", DebugSectionKind::DebugInfo)
+ .Case("debug_line", DebugSectionKind::DebugLine)
+ .Case("debug_frame", DebugSectionKind::DebugFrame)
+ .Case("debug_ranges", DebugSectionKind::DebugRange)
+ .Case("debug_rnglists", DebugSectionKind::DebugRngLists)
+ .Case("debug_loc", DebugSectionKind::DebugLoc)
+ .Case("debug_loclists", DebugSectionKind::DebugLocLists)
+ .Case("debug_aranges", DebugSectionKind::DebugARanges)
+ .Case("debug_abbrev", DebugSectionKind::DebugAbbrev)
+ .Case("debug_macinfo", DebugSectionKind::DebugMacinfo)
+ .Case("debug_macro", DebugSectionKind::DebugMacro)
+ .Default(std::nullopt);
+
+ return std::nullopt;
+}
+
+} // end of namespace dwarflinker_parallel
+} // end of namespace llvm
diff --git a/llvm/lib/DWARFLinkerParallel/OutputSections.h b/llvm/lib/DWARFLinkerParallel/OutputSections.h
new file mode 100644
index 000000000000..15ab4cc1167a
--- /dev/null
+++ b/llvm/lib/DWARFLinkerParallel/OutputSections.h
@@ -0,0 +1,67 @@
+//===- OutputSections.h -----------------------------------------*- C++ -*-===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIB_DWARFLINKERPARALLEL_OUTPUTSECTIONS_H
+#define LLVM_LIB_DWARFLINKERPARALLEL_OUTPUTSECTIONS_H
+
+#include "llvm/ADT/StringRef.h"
+#include <array>
+#include <cstdint>
+
+namespace llvm {
+namespace dwarflinker_parallel {
+
+/// This class keeps offsets to the debug sections. Any object which is
+/// supposed to be emitted into the debug section should use this class to
+/// track debug sections offsets.
+class OutputSections {
+public:
+ /// List of tracked debug sections.
+ enum class DebugSectionKind : uint8_t {
+ DebugInfo = 0,
+ DebugLine,
+ DebugFrame,
+ DebugRange,
+ DebugRngLists,
+ DebugLoc,
+ DebugLocLists,
+ DebugARanges,
+ DebugAbbrev,
+ DebugMacinfo,
+ DebugMacro,
+ };
+ constexpr static size_t SectionKindsNum = 11;
+
+ /// Recognise the section name and match it with the DebugSectionKind.
+ static std::optional<DebugSectionKind> parseDebugSectionName(StringRef Name);
+
+ /// When objects(f.e. compile units) are glued into the single file,
+ /// the debug sections corresponding to the concrete object are assigned
+ /// with offsets inside the whole file. This method returns offset
+ /// to the \p SectionKind debug section, corresponding to this object.
+ uint64_t getStartOffset(DebugSectionKind SectionKind) const {
+ return Offsets[static_cast<
+ typename std::underlying_type<DebugSectionKind>::type>(SectionKind)];
+ }
+
+ /// Set offset to the start of specified \p SectionKind debug section,
+ /// corresponding to this object.
+ void setStartOffset(DebugSectionKind SectionKind, uint64_t Offset) {
+ Offsets[static_cast<typename std::underlying_type<DebugSectionKind>::type>(
+ SectionKind)] = Offset;
+ }
+
+protected:
+ /// Offsets to the debug sections composing this object.
+ std::array<uint64_t, SectionKindsNum> Offsets = {0};
+};
+
+} // end of namespace dwarflinker_parallel
+} // end namespace llvm
+
+#endif // LLVM_LIB_DWARFLINKERPARALLEL_OUTPUTSECTIONS_H
diff --git a/llvm/lib/DWARFLinkerParallel/StringPool.cpp b/llvm/lib/DWARFLinkerParallel/StringPool.cpp
new file mode 100644
index 000000000000..fbff6b05e3a5
--- /dev/null
+++ b/llvm/lib/DWARFLinkerParallel/StringPool.cpp
@@ -0,0 +1,9 @@
+//=== StringPool.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 "llvm/DWARFLinkerParallel/StringPool.h"
generated by cgit v1.2.3 (git 2.25.1) at 2025-11-03 11:27:50 +0000