forked from OSchip/llvm-project
639 lines
22 KiB
C++
639 lines
22 KiB
C++
//===-- llvm-dwp.cpp - Split DWARF merging tool for llvm ------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// A utility for merging DWARF 5 Split DWARF .dwo files into .dwp (DWARF
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// package files).
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ADT/MapVector.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/ADT/StringSet.h"
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#include "llvm/CodeGen/AsmPrinter.h"
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#include "llvm/DebugInfo/DWARF/DWARFFormValue.h"
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#include "llvm/DebugInfo/DWARF/DWARFUnitIndex.h"
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#include "llvm/MC/MCAsmInfo.h"
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#include "llvm/MC/MCContext.h"
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#include "llvm/MC/MCInstrInfo.h"
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#include "llvm/MC/MCObjectFileInfo.h"
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#include "llvm/MC/MCRegisterInfo.h"
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#include "llvm/MC/MCSectionELF.h"
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#include "llvm/MC/MCStreamer.h"
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#include "llvm/MC/MCTargetOptionsCommandFlags.h"
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#include "llvm/Object/ObjectFile.h"
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#include "llvm/Support/Compression.h"
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#include "llvm/Support/DataExtractor.h"
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#include "llvm/Support/FileSystem.h"
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#include "llvm/Support/MathExtras.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/Options.h"
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#include "llvm/Support/TargetRegistry.h"
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#include "llvm/Support/TargetSelect.h"
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#include "llvm/Support/raw_ostream.h"
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#include "llvm/Target/TargetMachine.h"
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#include <list>
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#include <iostream>
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#include <memory>
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#include <system_error>
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#include <unordered_set>
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using namespace llvm;
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using namespace llvm::object;
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using namespace cl;
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OptionCategory DwpCategory("Specific Options");
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static list<std::string> InputFiles(Positional, OneOrMore,
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desc("<input files>"), cat(DwpCategory));
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static opt<std::string> OutputFilename(Required, "o",
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desc("Specify the output file."),
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value_desc("filename"),
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cat(DwpCategory));
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static int error(const Twine &Error, const Twine &Context) {
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errs() << Twine("while processing ") + Context + ":\n";
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errs() << Twine("error: ") + Error + "\n";
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return 1;
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}
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static std::error_code
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writeStringsAndOffsets(MCStreamer &Out, StringMap<uint32_t> &Strings,
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uint32_t &StringOffset, MCSection *StrSection,
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MCSection *StrOffsetSection, StringRef CurStrSection,
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StringRef CurStrOffsetSection) {
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// Could possibly produce an error or warning if one of these was non-null but
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// the other was null.
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if (CurStrSection.empty() || CurStrOffsetSection.empty())
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return std::error_code();
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DenseMap<uint32_t, uint32_t> OffsetRemapping;
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DataExtractor Data(CurStrSection, true, 0);
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uint32_t LocalOffset = 0;
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uint32_t PrevOffset = 0;
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while (const char *s = Data.getCStr(&LocalOffset)) {
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StringRef Str(s, LocalOffset - PrevOffset - 1);
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auto Pair = Strings.insert(std::make_pair(Str, StringOffset));
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if (Pair.second) {
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Out.SwitchSection(StrSection);
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Out.EmitBytes(
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StringRef(Pair.first->getKeyData(), Pair.first->getKeyLength() + 1));
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StringOffset += Str.size() + 1;
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}
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OffsetRemapping[PrevOffset] = Pair.first->second;
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PrevOffset = LocalOffset;
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}
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Data = DataExtractor(CurStrOffsetSection, true, 0);
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Out.SwitchSection(StrOffsetSection);
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uint32_t Offset = 0;
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uint64_t Size = CurStrOffsetSection.size();
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while (Offset < Size) {
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auto OldOffset = Data.getU32(&Offset);
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auto NewOffset = OffsetRemapping[OldOffset];
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Out.EmitIntValue(NewOffset, 4);
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}
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return std::error_code();
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}
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static uint32_t getCUAbbrev(StringRef Abbrev, uint64_t AbbrCode) {
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uint64_t CurCode;
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uint32_t Offset = 0;
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DataExtractor AbbrevData(Abbrev, true, 0);
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while ((CurCode = AbbrevData.getULEB128(&Offset)) != AbbrCode) {
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// Tag
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AbbrevData.getULEB128(&Offset);
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// DW_CHILDREN
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AbbrevData.getU8(&Offset);
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// Attributes
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while (AbbrevData.getULEB128(&Offset) | AbbrevData.getULEB128(&Offset))
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;
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}
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return Offset;
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}
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struct CompileUnitIdentifiers {
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uint64_t Signature = 0;
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const char *Name = "";
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const char *DWOName = "";
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};
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static const char *getIndexedString(uint32_t Form, DataExtractor InfoData,
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uint32_t &InfoOffset, StringRef StrOffsets,
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StringRef Str) {
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if (Form == dwarf::DW_FORM_string)
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return InfoData.getCStr(&InfoOffset);
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assert(Form == dwarf::DW_FORM_GNU_str_index);
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auto StrIndex = InfoData.getULEB128(&InfoOffset);
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DataExtractor StrOffsetsData(StrOffsets, true, 0);
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uint32_t StrOffsetsOffset = 4 * StrIndex;
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uint32_t StrOffset = StrOffsetsData.getU32(&StrOffsetsOffset);
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DataExtractor StrData(Str, true, 0);
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return StrData.getCStr(&StrOffset);
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}
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static CompileUnitIdentifiers getCUIdentifiers(StringRef Abbrev, StringRef Info,
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StringRef StrOffsets,
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StringRef Str) {
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uint32_t Offset = 0;
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DataExtractor InfoData(Info, true, 0);
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InfoData.getU32(&Offset); // Length
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uint16_t Version = InfoData.getU16(&Offset);
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InfoData.getU32(&Offset); // Abbrev offset (should be zero)
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uint8_t AddrSize = InfoData.getU8(&Offset);
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uint32_t AbbrCode = InfoData.getULEB128(&Offset);
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DataExtractor AbbrevData(Abbrev, true, 0);
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uint32_t AbbrevOffset = getCUAbbrev(Abbrev, AbbrCode);
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uint64_t Tag = AbbrevData.getULEB128(&AbbrevOffset);
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(void)Tag;
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// FIXME: Real error handling
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assert(Tag == dwarf::DW_TAG_compile_unit);
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// DW_CHILDREN
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AbbrevData.getU8(&AbbrevOffset);
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uint32_t Name;
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uint32_t Form;
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CompileUnitIdentifiers ID;
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while ((Name = AbbrevData.getULEB128(&AbbrevOffset)) |
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(Form = AbbrevData.getULEB128(&AbbrevOffset)) &&
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(Name != 0 || Form != 0)) {
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switch (Name) {
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case dwarf::DW_AT_name: {
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ID.Name = getIndexedString(Form, InfoData, Offset, StrOffsets, Str);
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break;
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}
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case dwarf::DW_AT_GNU_dwo_name: {
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ID.DWOName = getIndexedString(Form, InfoData, Offset, StrOffsets, Str);
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break;
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}
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case dwarf::DW_AT_GNU_dwo_id:
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ID.Signature = InfoData.getU64(&Offset);
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break;
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default:
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DWARFFormValue::skipValue(Form, InfoData, &Offset, Version, AddrSize);
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}
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}
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return ID;
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}
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struct UnitIndexEntry {
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DWARFUnitIndex::Entry::SectionContribution Contributions[8];
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std::string Name;
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std::string DWOName;
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StringRef DWPName;
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};
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StringRef getSubsection(StringRef Section, const DWARFUnitIndex::Entry &Entry, DWARFSectionKind Kind) {
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const auto *Off = Entry.getOffset(Kind);
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if (!Off)
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return StringRef();
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return Section.substr(Off->Offset, Off->Length);
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}
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static void addAllTypesFromDWP(
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MCStreamer &Out, MapVector<uint64_t, UnitIndexEntry> &TypeIndexEntries,
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const DWARFUnitIndex &TUIndex, MCSection *OutputTypes, StringRef Types,
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const UnitIndexEntry &TUEntry, uint32_t &TypesOffset) {
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Out.SwitchSection(OutputTypes);
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for (const DWARFUnitIndex::Entry &E : TUIndex.getRows()) {
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auto *I = E.getOffsets();
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if (!I)
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continue;
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auto P = TypeIndexEntries.insert(std::make_pair(E.getSignature(), TUEntry));
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if (!P.second)
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continue;
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auto &Entry = P.first->second;
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// Zero out the debug_info contribution
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Entry.Contributions[0] = {};
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for (auto Kind : TUIndex.getColumnKinds()) {
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auto &C = Entry.Contributions[Kind - DW_SECT_INFO];
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C.Offset += I->Offset;
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C.Length = I->Length;
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++I;
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}
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auto &C = Entry.Contributions[DW_SECT_TYPES - DW_SECT_INFO];
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Out.EmitBytes(Types.substr(
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C.Offset - TUEntry.Contributions[DW_SECT_TYPES - DW_SECT_INFO].Offset,
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C.Length));
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C.Offset = TypesOffset;
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TypesOffset += C.Length;
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}
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}
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static void addAllTypes(MCStreamer &Out,
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MapVector<uint64_t, UnitIndexEntry> &TypeIndexEntries,
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MCSection *OutputTypes,
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const std::vector<StringRef> &TypesSections,
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const UnitIndexEntry &CUEntry, uint32_t &TypesOffset) {
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for (StringRef Types : TypesSections) {
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Out.SwitchSection(OutputTypes);
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uint32_t Offset = 0;
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DataExtractor Data(Types, true, 0);
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while (Data.isValidOffset(Offset)) {
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UnitIndexEntry Entry = CUEntry;
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// Zero out the debug_info contribution
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Entry.Contributions[0] = {};
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auto &C = Entry.Contributions[DW_SECT_TYPES - DW_SECT_INFO];
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C.Offset = TypesOffset;
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auto PrevOffset = Offset;
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// Length of the unit, including the 4 byte length field.
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C.Length = Data.getU32(&Offset) + 4;
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Data.getU16(&Offset); // Version
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Data.getU32(&Offset); // Abbrev offset
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Data.getU8(&Offset); // Address size
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auto Signature = Data.getU64(&Offset);
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Offset = PrevOffset + C.Length;
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auto P = TypeIndexEntries.insert(std::make_pair(Signature, Entry));
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if (!P.second)
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continue;
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Out.EmitBytes(Types.substr(PrevOffset, C.Length));
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TypesOffset += C.Length;
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}
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}
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}
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static void
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writeIndexTable(MCStreamer &Out, ArrayRef<unsigned> ContributionOffsets,
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const MapVector<uint64_t, UnitIndexEntry> &IndexEntries,
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uint32_t DWARFUnitIndex::Entry::SectionContribution::*Field) {
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for (const auto &E : IndexEntries)
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for (size_t i = 0; i != array_lengthof(E.second.Contributions); ++i)
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if (ContributionOffsets[i])
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Out.EmitIntValue(E.second.Contributions[i].*Field, 4);
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}
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static void
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writeIndex(MCStreamer &Out, MCSection *Section,
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ArrayRef<unsigned> ContributionOffsets,
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const MapVector<uint64_t, UnitIndexEntry> &IndexEntries) {
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if (IndexEntries.empty())
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return;
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unsigned Columns = 0;
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for (auto &C : ContributionOffsets)
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if (C)
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++Columns;
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std::vector<unsigned> Buckets(NextPowerOf2(3 * IndexEntries.size() / 2));
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uint64_t Mask = Buckets.size() - 1;
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size_t i = 0;
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for (const auto &P : IndexEntries) {
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auto S = P.first;
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auto H = S & Mask;
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auto HP = ((S >> 32) & Mask) | 1;
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while (Buckets[H]) {
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assert(S != IndexEntries.begin()[Buckets[H] - 1].first &&
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"Duplicate unit");
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H = (H + HP) & Mask;
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}
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Buckets[H] = i + 1;
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++i;
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}
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Out.SwitchSection(Section);
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Out.EmitIntValue(2, 4); // Version
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Out.EmitIntValue(Columns, 4); // Columns
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Out.EmitIntValue(IndexEntries.size(), 4); // Num Units
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Out.EmitIntValue(Buckets.size(), 4); // Num Buckets
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// Write the signatures.
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for (const auto &I : Buckets)
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Out.EmitIntValue(I ? IndexEntries.begin()[I - 1].first : 0, 8);
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// Write the indexes.
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for (const auto &I : Buckets)
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Out.EmitIntValue(I, 4);
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// Write the column headers (which sections will appear in the table)
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for (size_t i = 0; i != ContributionOffsets.size(); ++i)
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if (ContributionOffsets[i])
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Out.EmitIntValue(i + DW_SECT_INFO, 4);
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// Write the offsets.
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writeIndexTable(Out, ContributionOffsets, IndexEntries,
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&DWARFUnitIndex::Entry::SectionContribution::Offset);
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// Write the lengths.
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writeIndexTable(Out, ContributionOffsets, IndexEntries,
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&DWARFUnitIndex::Entry::SectionContribution::Length);
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}
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static bool consumeCompressedDebugSectionHeader(StringRef &data,
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uint64_t &OriginalSize) {
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// Consume "ZLIB" prefix.
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if (!data.startswith("ZLIB"))
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return false;
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data = data.substr(4);
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// Consume uncompressed section size (big-endian 8 bytes).
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DataExtractor extractor(data, false, 8);
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uint32_t Offset = 0;
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OriginalSize = extractor.getU64(&Offset);
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if (Offset == 0)
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return false;
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data = data.substr(Offset);
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return true;
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}
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void printDuplicateError(const std::pair<uint64_t, UnitIndexEntry> &PrevE,
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const CompileUnitIdentifiers &ID, StringRef DWPName) {
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errs() << "Duplicate DWO ID (" << PrevE.first << ") in '" << PrevE.second.Name
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<< '\'';
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if (!PrevE.second.DWPName.empty()) {
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errs() << " (from ";
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if (!PrevE.second.DWOName.empty())
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errs() << '\'' << PrevE.second.DWOName << "' in ";
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errs() << "'" << PrevE.second.DWPName.str() << "')";
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}
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errs() << " and '" << ID.Name << '\'';
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if (!DWPName.empty()) {
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errs() << " (from ";
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if (*ID.DWOName)
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errs() << '\'' << ID.DWOName << "\' in ";
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errs() << '\'' << DWPName << "')";
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}
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errs() << '\n';
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}
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static std::error_code write(MCStreamer &Out, ArrayRef<std::string> Inputs) {
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const auto &MCOFI = *Out.getContext().getObjectFileInfo();
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MCSection *const StrSection = MCOFI.getDwarfStrDWOSection();
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MCSection *const StrOffsetSection = MCOFI.getDwarfStrOffDWOSection();
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MCSection *const TypesSection = MCOFI.getDwarfTypesDWOSection();
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MCSection *const CUIndexSection = MCOFI.getDwarfCUIndexSection();
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MCSection *const TUIndexSection = MCOFI.getDwarfTUIndexSection();
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const StringMap<std::pair<MCSection *, DWARFSectionKind>> KnownSections = {
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{"debug_info.dwo", {MCOFI.getDwarfInfoDWOSection(), DW_SECT_INFO}},
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{"debug_types.dwo", {MCOFI.getDwarfTypesDWOSection(), DW_SECT_TYPES}},
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{"debug_str_offsets.dwo", {StrOffsetSection, DW_SECT_STR_OFFSETS}},
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{"debug_str.dwo", {StrSection, static_cast<DWARFSectionKind>(0)}},
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{"debug_loc.dwo", {MCOFI.getDwarfLocDWOSection(), DW_SECT_LOC}},
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{"debug_line.dwo", {MCOFI.getDwarfLineDWOSection(), DW_SECT_LINE}},
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{"debug_abbrev.dwo", {MCOFI.getDwarfAbbrevDWOSection(), DW_SECT_ABBREV}},
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{"debug_cu_index", {CUIndexSection, static_cast<DWARFSectionKind>(0)}},
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{"debug_tu_index", {TUIndexSection, static_cast<DWARFSectionKind>(0)}}};
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MapVector<uint64_t, UnitIndexEntry> IndexEntries;
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MapVector<uint64_t, UnitIndexEntry> TypeIndexEntries;
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StringMap<uint32_t> Strings;
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uint32_t StringOffset = 0;
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uint32_t ContributionOffsets[8] = {};
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for (const auto &Input : Inputs) {
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auto ErrOrObj = object::ObjectFile::createObjectFile(Input);
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if (!ErrOrObj)
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return errorToErrorCode(ErrOrObj.takeError());
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UnitIndexEntry CurEntry = {};
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StringRef CurStrSection;
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StringRef CurStrOffsetSection;
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std::vector<StringRef> CurTypesSection;
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StringRef InfoSection;
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StringRef AbbrevSection;
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StringRef CurCUIndexSection;
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StringRef CurTUIndexSection;
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SmallVector<SmallString<32>, 4> UncompressedSections;
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for (const auto &Section : ErrOrObj->getBinary()->sections()) {
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if (Section.isBSS())
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continue;
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if (Section.isVirtual())
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continue;
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StringRef Name;
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if (std::error_code Err = Section.getName(Name))
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return Err;
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Name = Name.substr(Name.find_first_not_of("._"));
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StringRef Contents;
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if (auto Err = Section.getContents(Contents))
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return Err;
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if (Name.startswith("zdebug_")) {
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uint64_t OriginalSize;
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if (!zlib::isAvailable() ||
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!consumeCompressedDebugSectionHeader(Contents, OriginalSize))
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return make_error_code(std::errc::invalid_argument);
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UncompressedSections.resize(UncompressedSections.size() + 1);
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if (zlib::uncompress(Contents, UncompressedSections.back(), OriginalSize) !=
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zlib::StatusOK) {
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UncompressedSections.pop_back();
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continue;
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}
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Name = Name.substr(1);
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Contents = UncompressedSections.back();
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}
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auto SectionPair = KnownSections.find(Name);
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if (SectionPair == KnownSections.end())
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continue;
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if (DWARFSectionKind Kind = SectionPair->second.second) {
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auto Index = Kind - DW_SECT_INFO;
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if (Kind != DW_SECT_TYPES) {
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CurEntry.Contributions[Index].Offset = ContributionOffsets[Index];
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ContributionOffsets[Index] +=
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(CurEntry.Contributions[Index].Length = Contents.size());
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}
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switch (Kind) {
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case DW_SECT_INFO:
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InfoSection = Contents;
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break;
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case DW_SECT_ABBREV:
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AbbrevSection = Contents;
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break;
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default:
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break;
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}
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}
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MCSection *OutSection = SectionPair->second.first;
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if (OutSection == StrOffsetSection)
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CurStrOffsetSection = Contents;
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else if (OutSection == StrSection)
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CurStrSection = Contents;
|
|
else if (OutSection == TypesSection)
|
|
CurTypesSection.push_back(Contents);
|
|
else if (OutSection == CUIndexSection)
|
|
CurCUIndexSection = Contents;
|
|
else if (OutSection == TUIndexSection)
|
|
CurTUIndexSection = Contents;
|
|
else {
|
|
Out.SwitchSection(OutSection);
|
|
Out.EmitBytes(Contents);
|
|
}
|
|
}
|
|
|
|
if (InfoSection.empty())
|
|
continue;
|
|
|
|
if (!CurCUIndexSection.empty()) {
|
|
DWARFUnitIndex CUIndex(DW_SECT_INFO);
|
|
DataExtractor CUIndexData(CurCUIndexSection,
|
|
ErrOrObj->getBinary()->isLittleEndian(), 0);
|
|
if (!CUIndex.parse(CUIndexData))
|
|
return make_error_code(std::errc::invalid_argument);
|
|
|
|
for (const DWARFUnitIndex::Entry &E : CUIndex.getRows()) {
|
|
auto *I = E.getOffsets();
|
|
if (!I)
|
|
continue;
|
|
auto P =
|
|
IndexEntries.insert(std::make_pair(E.getSignature(), CurEntry));
|
|
CompileUnitIdentifiers ID = getCUIdentifiers(
|
|
getSubsection(AbbrevSection, E, DW_SECT_ABBREV),
|
|
getSubsection(InfoSection, E, DW_SECT_INFO),
|
|
getSubsection(CurStrOffsetSection, E, DW_SECT_STR_OFFSETS),
|
|
CurStrSection);
|
|
if (!P.second) {
|
|
printDuplicateError(*P.first, ID, Input);
|
|
return make_error_code(std::errc::invalid_argument);
|
|
}
|
|
auto &NewEntry = P.first->second;
|
|
NewEntry.Name = ID.Name;
|
|
NewEntry.DWOName = ID.DWOName;
|
|
NewEntry.DWPName = Input;
|
|
for (auto Kind : CUIndex.getColumnKinds()) {
|
|
auto &C = NewEntry.Contributions[Kind - DW_SECT_INFO];
|
|
C.Offset += I->Offset;
|
|
C.Length = I->Length;
|
|
++I;
|
|
}
|
|
}
|
|
|
|
if (!CurTypesSection.empty()) {
|
|
assert(CurTypesSection.size() == 1);
|
|
if (CurTUIndexSection.empty())
|
|
return make_error_code(std::errc::invalid_argument);
|
|
DWARFUnitIndex TUIndex(DW_SECT_TYPES);
|
|
DataExtractor TUIndexData(CurTUIndexSection,
|
|
ErrOrObj->getBinary()->isLittleEndian(), 0);
|
|
if (!TUIndex.parse(TUIndexData))
|
|
return make_error_code(std::errc::invalid_argument);
|
|
addAllTypesFromDWP(Out, TypeIndexEntries, TUIndex, TypesSection,
|
|
CurTypesSection.front(), CurEntry,
|
|
ContributionOffsets[DW_SECT_TYPES - DW_SECT_INFO]);
|
|
}
|
|
} else {
|
|
CompileUnitIdentifiers ID = getCUIdentifiers(
|
|
AbbrevSection, InfoSection, CurStrOffsetSection, CurStrSection);
|
|
auto P = IndexEntries.insert(std::make_pair(ID.Signature, CurEntry));
|
|
if (!P.second) {
|
|
printDuplicateError(*P.first, ID, "");
|
|
return make_error_code(std::errc::invalid_argument);
|
|
}
|
|
P.first->second.Name = ID.Name;
|
|
P.first->second.DWOName = ID.DWOName;
|
|
addAllTypes(Out, TypeIndexEntries, TypesSection, CurTypesSection,
|
|
CurEntry, ContributionOffsets[DW_SECT_TYPES - DW_SECT_INFO]);
|
|
}
|
|
|
|
if (auto Err = writeStringsAndOffsets(Out, Strings, StringOffset,
|
|
StrSection, StrOffsetSection,
|
|
CurStrSection, CurStrOffsetSection))
|
|
return Err;
|
|
}
|
|
|
|
// Lie about there being no info contributions so the TU index only includes
|
|
// the type unit contribution
|
|
ContributionOffsets[0] = 0;
|
|
writeIndex(Out, MCOFI.getDwarfTUIndexSection(), ContributionOffsets,
|
|
TypeIndexEntries);
|
|
|
|
// Lie about the type contribution
|
|
ContributionOffsets[DW_SECT_TYPES - DW_SECT_INFO] = 0;
|
|
// Unlie about the info contribution
|
|
ContributionOffsets[0] = 1;
|
|
|
|
writeIndex(Out, MCOFI.getDwarfCUIndexSection(), ContributionOffsets,
|
|
IndexEntries);
|
|
|
|
return std::error_code();
|
|
}
|
|
|
|
int main(int argc, char **argv) {
|
|
|
|
ParseCommandLineOptions(argc, argv, "merge split dwarf (.dwo) files");
|
|
|
|
llvm::InitializeAllTargetInfos();
|
|
llvm::InitializeAllTargetMCs();
|
|
llvm::InitializeAllTargets();
|
|
llvm::InitializeAllAsmPrinters();
|
|
|
|
std::string ErrorStr;
|
|
StringRef Context = "dwarf streamer init";
|
|
|
|
Triple TheTriple("x86_64-linux-gnu");
|
|
|
|
// Get the target.
|
|
const Target *TheTarget =
|
|
TargetRegistry::lookupTarget("", TheTriple, ErrorStr);
|
|
if (!TheTarget)
|
|
return error(ErrorStr, Context);
|
|
std::string TripleName = TheTriple.getTriple();
|
|
|
|
// Create all the MC Objects.
|
|
std::unique_ptr<MCRegisterInfo> MRI(TheTarget->createMCRegInfo(TripleName));
|
|
if (!MRI)
|
|
return error(Twine("no register info for target ") + TripleName, Context);
|
|
|
|
std::unique_ptr<MCAsmInfo> MAI(TheTarget->createMCAsmInfo(*MRI, TripleName));
|
|
if (!MAI)
|
|
return error("no asm info for target " + TripleName, Context);
|
|
|
|
MCObjectFileInfo MOFI;
|
|
MCContext MC(MAI.get(), MRI.get(), &MOFI);
|
|
MOFI.InitMCObjectFileInfo(TheTriple, Reloc::Default, CodeModel::Default, MC);
|
|
|
|
auto MAB = TheTarget->createMCAsmBackend(*MRI, TripleName, "");
|
|
if (!MAB)
|
|
return error("no asm backend for target " + TripleName, Context);
|
|
|
|
std::unique_ptr<MCInstrInfo> MII(TheTarget->createMCInstrInfo());
|
|
if (!MII)
|
|
return error("no instr info info for target " + TripleName, Context);
|
|
|
|
std::unique_ptr<MCSubtargetInfo> MSTI(
|
|
TheTarget->createMCSubtargetInfo(TripleName, "", ""));
|
|
if (!MSTI)
|
|
return error("no subtarget info for target " + TripleName, Context);
|
|
|
|
MCCodeEmitter *MCE = TheTarget->createMCCodeEmitter(*MII, *MRI, MC);
|
|
if (!MCE)
|
|
return error("no code emitter for target " + TripleName, Context);
|
|
|
|
// Create the output file.
|
|
std::error_code EC;
|
|
raw_fd_ostream OutFile(OutputFilename, EC, sys::fs::F_None);
|
|
if (EC)
|
|
return error(Twine(OutputFilename) + ": " + EC.message(), Context);
|
|
|
|
MCTargetOptions MCOptions = InitMCTargetOptionsFromFlags();
|
|
std::unique_ptr<MCStreamer> MS(TheTarget->createMCObjectStreamer(
|
|
TheTriple, MC, *MAB, OutFile, MCE, *MSTI, MCOptions.MCRelaxAll,
|
|
MCOptions.MCIncrementalLinkerCompatible,
|
|
/*DWARFMustBeAtTheEnd*/ false));
|
|
if (!MS)
|
|
return error("no object streamer for target " + TripleName, Context);
|
|
|
|
if (auto Err = write(*MS, InputFiles))
|
|
return error(Err.message(), "Writing DWP file");
|
|
|
|
MS->Finish();
|
|
}
|