X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FMC%2FMCContext.cpp;h=b5ad518d0330e89f6846cee1fe0dcffc6469836d;hb=62663ee66ebb56c586e55b7342546f3bd74c279f;hp=fa9e0760975fb040f11be60c4f8083ce20ca055f;hpb=087ab613f42890b2e84fb8a058f346ead2bfd595;p=oota-llvm.git diff --git a/lib/MC/MCContext.cpp b/lib/MC/MCContext.cpp index fa9e0760975..b5ad518d033 100644 --- a/lib/MC/MCContext.cpp +++ b/lib/MC/MCContext.cpp @@ -10,6 +10,7 @@ #include "llvm/MC/MCContext.h" #include "llvm/ADT/SmallString.h" #include "llvm/ADT/Twine.h" +#include "llvm/MC/MCAssembler.h" #include "llvm/MC/MCAsmInfo.h" #include "llvm/MC/MCDwarf.h" #include "llvm/MC/MCLabel.h" @@ -18,62 +19,50 @@ #include "llvm/MC/MCSectionCOFF.h" #include "llvm/MC/MCSectionELF.h" #include "llvm/MC/MCSectionMachO.h" -#include "llvm/MC/MCSymbol.h" +#include "llvm/MC/MCStreamer.h" +#include "llvm/MC/MCSymbolCOFF.h" +#include "llvm/MC/MCSymbolELF.h" +#include "llvm/MC/MCSymbolMachO.h" +#include "llvm/Support/COFF.h" #include "llvm/Support/ELF.h" #include "llvm/Support/ErrorHandling.h" #include "llvm/Support/FileSystem.h" #include "llvm/Support/MemoryBuffer.h" #include "llvm/Support/Signals.h" #include "llvm/Support/SourceMgr.h" - #include using namespace llvm; -typedef std::pair SectionGroupPair; - -typedef StringMap MachOUniqueMapTy; -typedef std::map ELFUniqueMapTy; -typedef std::map COFFUniqueMapTy; - MCContext::MCContext(const MCAsmInfo *mai, const MCRegisterInfo *mri, const MCObjectFileInfo *mofi, const SourceMgr *mgr, - bool DoAutoReset) : - SrcMgr(mgr), MAI(mai), MRI(mri), MOFI(mofi), - Allocator(), Symbols(Allocator), UsedNames(Allocator), - NextUniqueID(0), - CurrentDwarfLoc(0,0,0,DWARF2_FLAG_IS_STMT,0,0), - DwarfLocSeen(false), GenDwarfForAssembly(false), GenDwarfFileNumber(0), - AllowTemporaryLabels(true), DwarfCompileUnitID(0), AutoReset(DoAutoReset) { - - error_code EC = llvm::sys::fs::current_path(CompilationDir); - assert(!EC && "Could not determine the current directory"); - (void)EC; - - MachOUniquingMap = 0; - ELFUniquingMap = 0; - COFFUniquingMap = 0; + bool DoAutoReset) + : SrcMgr(mgr), MAI(mai), MRI(mri), MOFI(mofi), Allocator(), + Symbols(Allocator), UsedNames(Allocator), + CurrentDwarfLoc(0, 0, 0, DWARF2_FLAG_IS_STMT, 0, 0), DwarfLocSeen(false), + GenDwarfForAssembly(false), GenDwarfFileNumber(0), DwarfVersion(4), + AllowTemporaryLabels(true), DwarfCompileUnitID(0), + AutoReset(DoAutoReset), HadError(false) { + + std::error_code EC = llvm::sys::fs::current_path(CompilationDir); + if (EC) + CompilationDir.clear(); SecureLogFile = getenv("AS_SECURE_LOG_FILE"); - SecureLog = 0; + SecureLog = nullptr; SecureLogUsed = false; - if (SrcMgr && SrcMgr->getNumBuffers() > 0) - MainFileName = SrcMgr->getMemoryBuffer(0)->getBufferIdentifier(); - else - MainFileName = ""; + if (SrcMgr && SrcMgr->getNumBuffers()) + MainFileName = + SrcMgr->getMemoryBuffer(SrcMgr->getMainFileID())->getBufferIdentifier(); } MCContext::~MCContext() { - if (AutoReset) reset(); // NOTE: The symbols are all allocated out of a bump pointer allocator, // we don't need to free them here. - - // If the stream for the .secure_log_unique directive was created free it. - delete (raw_ostream*)SecureLog; } //===----------------------------------------------------------------------===// @@ -81,148 +70,212 @@ MCContext::~MCContext() { //===----------------------------------------------------------------------===// void MCContext::reset() { + // Call the destructors so the fragments are freed + COFFAllocator.DestroyAll(); + ELFAllocator.DestroyAll(); + MachOAllocator.DestroyAll(); + + MCSubtargetAllocator.DestroyAll(); UsedNames.clear(); Symbols.clear(); + SectionSymbols.clear(); Allocator.Reset(); Instances.clear(); - MCDwarfFilesCUMap.clear(); - MCDwarfDirsCUMap.clear(); + CompilationDir.clear(); + MainFileName.clear(); + MCDwarfLineTablesCUMap.clear(); + SectionsForRanges.clear(); MCGenDwarfLabelEntries.clear(); DwarfDebugFlags = StringRef(); - MCLineSections.clear(); - MCLineSectionOrder.clear(); DwarfCompileUnitID = 0; - MCLineTableSymbols.clear(); - CurrentDwarfLoc = MCDwarfLoc(0,0,0,DWARF2_FLAG_IS_STMT,0,0); - - // If we have the MachO uniquing map, free it. - delete (MachOUniqueMapTy*)MachOUniquingMap; - delete (ELFUniqueMapTy*)ELFUniquingMap; - delete (COFFUniqueMapTy*)COFFUniquingMap; - MachOUniquingMap = 0; - ELFUniquingMap = 0; - COFFUniquingMap = 0; - - NextUniqueID = 0; + CurrentDwarfLoc = MCDwarfLoc(0, 0, 0, DWARF2_FLAG_IS_STMT, 0, 0); + + MachOUniquingMap.clear(); + ELFUniquingMap.clear(); + COFFUniquingMap.clear(); + + NextID.clear(); AllowTemporaryLabels = true; DwarfLocSeen = false; GenDwarfForAssembly = false; GenDwarfFileNumber = 0; + + HadError = false; } //===----------------------------------------------------------------------===// // Symbol Manipulation //===----------------------------------------------------------------------===// -MCSymbol *MCContext::GetOrCreateSymbol(StringRef Name) { - assert(!Name.empty() && "Normal symbols cannot be unnamed!"); +MCSymbol *MCContext::getOrCreateSymbol(const Twine &Name) { + SmallString<128> NameSV; + StringRef NameRef = Name.toStringRef(NameSV); - // Do the lookup and get the entire StringMapEntry. We want access to the - // key if we are creating the entry. - StringMapEntry &Entry = Symbols.GetOrCreateValue(Name); - MCSymbol *Sym = Entry.getValue(); + assert(!NameRef.empty() && "Normal symbols cannot be unnamed!"); + MCSymbol *&Sym = Symbols[NameRef]; + if (!Sym) + Sym = createSymbol(NameRef, false, false); + + return Sym; +} + +MCSymbolELF *MCContext::getOrCreateSectionSymbol(const MCSectionELF &Section) { + MCSymbolELF *&Sym = SectionSymbols[&Section]; if (Sym) return Sym; - Sym = CreateSymbol(Name); - Entry.setValue(Sym); + StringRef Name = Section.getSectionName(); + + MCSymbol *&OldSym = Symbols[Name]; + if (OldSym && OldSym->isUndefined()) { + Sym = cast(OldSym); + return Sym; + } + + auto NameIter = UsedNames.insert(std::make_pair(Name, true)).first; + Sym = new (&*NameIter, *this) MCSymbolELF(&*NameIter, /*isTemporary*/ false); + + if (!OldSym) + OldSym = Sym; + return Sym; } -MCSymbol *MCContext::CreateSymbol(StringRef Name) { - // Determine whether this is an assembler temporary or normal label, if used. - bool isTemporary = false; - if (AllowTemporaryLabels) - isTemporary = Name.startswith(MAI->getPrivateGlobalPrefix()); +MCSymbol *MCContext::getOrCreateFrameAllocSymbol(StringRef FuncName, + unsigned Idx) { + return getOrCreateSymbol(Twine(MAI->getPrivateGlobalPrefix()) + FuncName + + "$frame_escape_" + Twine(Idx)); +} + +MCSymbol *MCContext::getOrCreateParentFrameOffsetSymbol(StringRef FuncName) { + return getOrCreateSymbol(Twine(MAI->getPrivateGlobalPrefix()) + FuncName + + "$parent_frame_offset"); +} + +MCSymbol *MCContext::getOrCreateLSDASymbol(StringRef FuncName) { + return getOrCreateSymbol(Twine(MAI->getPrivateGlobalPrefix()) + "__ehtable$" + + FuncName); +} + +MCSymbol *MCContext::createSymbolImpl(const StringMapEntry *Name, + bool IsTemporary) { + if (MOFI) { + switch (MOFI->getObjectFileType()) { + case MCObjectFileInfo::IsCOFF: + return new (Name, *this) MCSymbolCOFF(Name, IsTemporary); + case MCObjectFileInfo::IsELF: + return new (Name, *this) MCSymbolELF(Name, IsTemporary); + case MCObjectFileInfo::IsMachO: + return new (Name, *this) MCSymbolMachO(Name, IsTemporary); + } + } + return new (Name, *this) MCSymbol(MCSymbol::SymbolKindUnset, Name, + IsTemporary); +} - StringMapEntry *NameEntry = &UsedNames.GetOrCreateValue(Name); - if (NameEntry->getValue()) { - assert(isTemporary && "Cannot rename non-temporary symbols"); - SmallString<128> NewName = Name; - do { +MCSymbol *MCContext::createSymbol(StringRef Name, bool AlwaysAddSuffix, + bool CanBeUnnamed) { + if (CanBeUnnamed && !UseNamesOnTempLabels) + return createSymbolImpl(nullptr, true); + + // Determine whether this is an user writter assembler temporary or normal + // label, if used. + bool IsTemporary = CanBeUnnamed; + if (AllowTemporaryLabels && !IsTemporary) + IsTemporary = Name.startswith(MAI->getPrivateGlobalPrefix()); + + SmallString<128> NewName = Name; + bool AddSuffix = AlwaysAddSuffix; + unsigned &NextUniqueID = NextID[Name]; + for (;;) { + if (AddSuffix) { NewName.resize(Name.size()); raw_svector_ostream(NewName) << NextUniqueID++; - NameEntry = &UsedNames.GetOrCreateValue(NewName); - } while (NameEntry->getValue()); + } + auto NameEntry = UsedNames.insert(std::make_pair(NewName, true)); + if (NameEntry.second) { + // Ok, we found a name. Have the MCSymbol object itself refer to the copy + // of the string that is embedded in the UsedNames entry. + return createSymbolImpl(&*NameEntry.first, IsTemporary); + } + assert(IsTemporary && "Cannot rename non-temporary symbols"); + AddSuffix = true; } - NameEntry->setValue(true); - - // Ok, the entry doesn't already exist. Have the MCSymbol object itself refer - // to the copy of the string that is embedded in the UsedNames entry. - MCSymbol *Result = new (*this) MCSymbol(NameEntry->getKey(), isTemporary); - - return Result; + llvm_unreachable("Infinite loop"); } -MCSymbol *MCContext::GetOrCreateSymbol(const Twine &Name) { +MCSymbol *MCContext::createTempSymbol(const Twine &Name, bool AlwaysAddSuffix, + bool CanBeUnnamed) { SmallString<128> NameSV; - return GetOrCreateSymbol(Name.toStringRef(NameSV)); + raw_svector_ostream(NameSV) << MAI->getPrivateGlobalPrefix() << Name; + return createSymbol(NameSV, AlwaysAddSuffix, CanBeUnnamed); } -MCSymbol *MCContext::CreateTempSymbol() { +MCSymbol *MCContext::createLinkerPrivateTempSymbol() { SmallString<128> NameSV; - raw_svector_ostream(NameSV) - << MAI->getPrivateGlobalPrefix() << "tmp" << NextUniqueID++; - return CreateSymbol(NameSV); + raw_svector_ostream(NameSV) << MAI->getLinkerPrivateGlobalPrefix() << "tmp"; + return createSymbol(NameSV, true, false); } -unsigned MCContext::NextInstance(int64_t LocalLabelVal) { +MCSymbol *MCContext::createTempSymbol(bool CanBeUnnamed) { + return createTempSymbol("tmp", true, CanBeUnnamed); +} + +unsigned MCContext::NextInstance(unsigned LocalLabelVal) { MCLabel *&Label = Instances[LocalLabelVal]; if (!Label) Label = new (*this) MCLabel(0); return Label->incInstance(); } -unsigned MCContext::GetInstance(int64_t LocalLabelVal) { +unsigned MCContext::GetInstance(unsigned LocalLabelVal) { MCLabel *&Label = Instances[LocalLabelVal]; if (!Label) Label = new (*this) MCLabel(0); return Label->getInstance(); } -MCSymbol *MCContext::CreateDirectionalLocalSymbol(int64_t LocalLabelVal) { - return GetOrCreateSymbol(Twine(MAI->getPrivateGlobalPrefix()) + - Twine(LocalLabelVal) + - "\2" + - Twine(NextInstance(LocalLabelVal))); +MCSymbol *MCContext::getOrCreateDirectionalLocalSymbol(unsigned LocalLabelVal, + unsigned Instance) { + MCSymbol *&Sym = LocalSymbols[std::make_pair(LocalLabelVal, Instance)]; + if (!Sym) + Sym = createTempSymbol(false); + return Sym; } -MCSymbol *MCContext::GetDirectionalLocalSymbol(int64_t LocalLabelVal, - int bORf) { - return GetOrCreateSymbol(Twine(MAI->getPrivateGlobalPrefix()) + - Twine(LocalLabelVal) + - "\2" + - Twine(GetInstance(LocalLabelVal) + bORf)); + +MCSymbol *MCContext::createDirectionalLocalSymbol(unsigned LocalLabelVal) { + unsigned Instance = NextInstance(LocalLabelVal); + return getOrCreateDirectionalLocalSymbol(LocalLabelVal, Instance); } -MCSymbol *MCContext::LookupSymbol(StringRef Name) const { - return Symbols.lookup(Name); +MCSymbol *MCContext::getDirectionalLocalSymbol(unsigned LocalLabelVal, + bool Before) { + unsigned Instance = GetInstance(LocalLabelVal); + if (!Before) + ++Instance; + return getOrCreateDirectionalLocalSymbol(LocalLabelVal, Instance); } -MCSymbol *MCContext::LookupSymbol(const Twine &Name) const { +MCSymbol *MCContext::lookupSymbol(const Twine &Name) const { SmallString<128> NameSV; - Name.toVector(NameSV); - return LookupSymbol(NameSV.str()); + StringRef NameRef = Name.toStringRef(NameSV); + return Symbols.lookup(NameRef); } //===----------------------------------------------------------------------===// // Section Management //===----------------------------------------------------------------------===// -const MCSectionMachO *MCContext:: -getMachOSection(StringRef Segment, StringRef Section, - unsigned TypeAndAttributes, - unsigned Reserved2, SectionKind Kind) { +MCSectionMachO *MCContext::getMachOSection(StringRef Segment, StringRef Section, + unsigned TypeAndAttributes, + unsigned Reserved2, SectionKind Kind, + const char *BeginSymName) { // We unique sections by their segment/section pair. The returned section // may not have the same flags as the requested section, if so this should be // diagnosed by the client as an error. - // Create the map if it doesn't already exist. - if (MachOUniquingMap == 0) - MachOUniquingMap = new MachOUniqueMapTy(); - MachOUniqueMapTy &Map = *(MachOUniqueMapTy*)MachOUniquingMap; - // Form the name to look up. SmallString<64> Name; Name += Segment; @@ -230,192 +283,215 @@ getMachOSection(StringRef Segment, StringRef Section, Name += Section; // Do the lookup, if we have a hit, return it. - const MCSectionMachO *&Entry = Map[Name.str()]; - if (Entry) return Entry; + MCSectionMachO *&Entry = MachOUniquingMap[Name]; + if (Entry) + return Entry; + + MCSymbol *Begin = nullptr; + if (BeginSymName) + Begin = createTempSymbol(BeginSymName, false); // Otherwise, return a new section. - return Entry = new (*this) MCSectionMachO(Segment, Section, TypeAndAttributes, - Reserved2, Kind); + return Entry = new (MachOAllocator.Allocate()) MCSectionMachO( + Segment, Section, TypeAndAttributes, Reserved2, Kind, Begin); } -const MCSectionELF *MCContext:: -getELFSection(StringRef Section, unsigned Type, unsigned Flags, - SectionKind Kind) { - return getELFSection(Section, Type, Flags, Kind, 0, ""); +void MCContext::renameELFSection(MCSectionELF *Section, StringRef Name) { + StringRef GroupName; + if (const MCSymbol *Group = Section->getGroup()) + GroupName = Group->getName(); + + unsigned UniqueID = Section->getUniqueID(); + ELFUniquingMap.erase( + ELFSectionKey{Section->getSectionName(), GroupName, UniqueID}); + auto I = ELFUniquingMap.insert(std::make_pair( + ELFSectionKey{Name, GroupName, UniqueID}, + Section)) + .first; + StringRef CachedName = I->first.SectionName; + const_cast(Section)->setSectionName(CachedName); } -const MCSectionELF *MCContext:: -getELFSection(StringRef Section, unsigned Type, unsigned Flags, - SectionKind Kind, unsigned EntrySize, StringRef Group) { - if (ELFUniquingMap == 0) - ELFUniquingMap = new ELFUniqueMapTy(); - ELFUniqueMapTy &Map = *(ELFUniqueMapTy*)ELFUniquingMap; +MCSectionELF *MCContext::createELFRelSection(StringRef Name, unsigned Type, + unsigned Flags, unsigned EntrySize, + const MCSymbolELF *Group, + const MCSectionELF *Associated) { + StringMap::iterator I; + bool Inserted; + std::tie(I, Inserted) = ELFRelSecNames.insert(std::make_pair(Name, true)); + + return new (ELFAllocator.Allocate()) + MCSectionELF(I->getKey(), Type, Flags, SectionKind::getReadOnly(), + EntrySize, Group, true, nullptr, Associated); +} + +MCSectionELF *MCContext::getELFSection(StringRef Section, unsigned Type, + unsigned Flags, unsigned EntrySize, + StringRef Group, unsigned UniqueID, + const char *BeginSymName) { + MCSymbolELF *GroupSym = nullptr; + if (!Group.empty()) + GroupSym = cast(getOrCreateSymbol(Group)); + + return getELFSection(Section, Type, Flags, EntrySize, GroupSym, UniqueID, + BeginSymName, nullptr); +} +MCSectionELF *MCContext::getELFSection(StringRef Section, unsigned Type, + unsigned Flags, unsigned EntrySize, + const MCSymbolELF *GroupSym, + unsigned UniqueID, + const char *BeginSymName, + const MCSectionELF *Associated) { + StringRef Group = ""; + if (GroupSym) + Group = GroupSym->getName(); // Do the lookup, if we have a hit, return it. - std::pair Entry = Map.insert( - std::make_pair(SectionGroupPair(Section, Group), (MCSectionELF *)0)); - if (!Entry.second) return Entry.first->second; + auto IterBool = ELFUniquingMap.insert( + std::make_pair(ELFSectionKey{Section, Group, UniqueID}, nullptr)); + auto &Entry = *IterBool.first; + if (!IterBool.second) + return Entry.second; - // Possibly refine the entry size first. - if (!EntrySize) { - EntrySize = MCSectionELF::DetermineEntrySize(Kind); - } + StringRef CachedName = Entry.first.SectionName; - MCSymbol *GroupSym = NULL; - if (!Group.empty()) - GroupSym = GetOrCreateSymbol(Group); + SectionKind Kind; + if (Flags & ELF::SHF_EXECINSTR) + Kind = SectionKind::getText(); + else + Kind = SectionKind::getReadOnly(); - MCSectionELF *Result = new (*this) MCSectionELF( - Entry.first->first.first, Type, Flags, Kind, EntrySize, GroupSym); - Entry.first->second = Result; + MCSymbol *Begin = nullptr; + if (BeginSymName) + Begin = createTempSymbol(BeginSymName, false); + + MCSectionELF *Result = new (ELFAllocator.Allocate()) + MCSectionELF(CachedName, Type, Flags, Kind, EntrySize, GroupSym, UniqueID, + Begin, Associated); + Entry.second = Result; return Result; } -const MCSectionELF *MCContext::CreateELFGroupSection() { - MCSectionELF *Result = - new (*this) MCSectionELF(".group", ELF::SHT_GROUP, 0, - SectionKind::getReadOnly(), 4, NULL); +MCSectionELF *MCContext::createELFGroupSection(const MCSymbolELF *Group) { + MCSectionELF *Result = new (ELFAllocator.Allocate()) + MCSectionELF(".group", ELF::SHT_GROUP, 0, SectionKind::getReadOnly(), 4, + Group, ~0, nullptr, nullptr); return Result; } -const MCSectionCOFF * -MCContext::getCOFFSection(StringRef Section, unsigned Characteristics, - SectionKind Kind, StringRef COMDATSymName, - int Selection, const MCSectionCOFF *Assoc) { - if (COFFUniquingMap == 0) - COFFUniquingMap = new COFFUniqueMapTy(); - COFFUniqueMapTy &Map = *(COFFUniqueMapTy*)COFFUniquingMap; +MCSectionCOFF *MCContext::getCOFFSection(StringRef Section, + unsigned Characteristics, + SectionKind Kind, + StringRef COMDATSymName, int Selection, + const char *BeginSymName) { + MCSymbol *COMDATSymbol = nullptr; + if (!COMDATSymName.empty()) { + COMDATSymbol = getOrCreateSymbol(COMDATSymName); + COMDATSymName = COMDATSymbol->getName(); + } // Do the lookup, if we have a hit, return it. - - SectionGroupPair P(Section, COMDATSymName); - std::pair Entry = - Map.insert(std::make_pair(P, (MCSectionCOFF *)0)); - COFFUniqueMapTy::iterator Iter = Entry.first; - if (!Entry.second) + COFFSectionKey T{Section, COMDATSymName, Selection}; + auto IterBool = COFFUniquingMap.insert(std::make_pair(T, nullptr)); + auto Iter = IterBool.first; + if (!IterBool.second) return Iter->second; - const MCSymbol *COMDATSymbol = NULL; - if (!COMDATSymName.empty()) - COMDATSymbol = GetOrCreateSymbol(COMDATSymName); + MCSymbol *Begin = nullptr; + if (BeginSymName) + Begin = createTempSymbol(BeginSymName, false); - MCSectionCOFF *Result = - new (*this) MCSectionCOFF(Iter->first.first, Characteristics, - COMDATSymbol, Selection, Assoc, Kind); + StringRef CachedName = Iter->first.SectionName; + MCSectionCOFF *Result = new (COFFAllocator.Allocate()) MCSectionCOFF( + CachedName, Characteristics, COMDATSymbol, Selection, Kind, Begin); Iter->second = Result; return Result; } -const MCSectionCOFF * -MCContext::getCOFFSection(StringRef Section, unsigned Characteristics, - SectionKind Kind) { - return getCOFFSection(Section, Characteristics, Kind, "", 0); +MCSectionCOFF *MCContext::getCOFFSection(StringRef Section, + unsigned Characteristics, + SectionKind Kind, + const char *BeginSymName) { + return getCOFFSection(Section, Characteristics, Kind, "", 0, BeginSymName); } -const MCSectionCOFF *MCContext::getCOFFSection(StringRef Section) { - if (COFFUniquingMap == 0) - COFFUniquingMap = new COFFUniqueMapTy(); - COFFUniqueMapTy &Map = *(COFFUniqueMapTy*)COFFUniquingMap; - - SectionGroupPair P(Section, ""); - COFFUniqueMapTy::iterator Iter = Map.find(P); - if (Iter == Map.end()) - return 0; +MCSectionCOFF *MCContext::getCOFFSection(StringRef Section) { + COFFSectionKey T{Section, "", 0}; + auto Iter = COFFUniquingMap.find(T); + if (Iter == COFFUniquingMap.end()) + return nullptr; return Iter->second; } +MCSectionCOFF *MCContext::getAssociativeCOFFSection(MCSectionCOFF *Sec, + const MCSymbol *KeySym) { + // Return the normal section if we don't have to be associative. + if (!KeySym) + return Sec; + + // Make an associative section with the same name and kind as the normal + // section. + unsigned Characteristics = + Sec->getCharacteristics() | COFF::IMAGE_SCN_LNK_COMDAT; + return getCOFFSection(Sec->getSectionName(), Characteristics, Sec->getKind(), + KeySym->getName(), + COFF::IMAGE_COMDAT_SELECT_ASSOCIATIVE); +} + +MCSubtargetInfo &MCContext::getSubtargetCopy(const MCSubtargetInfo &STI) { + return *new (MCSubtargetAllocator.Allocate()) MCSubtargetInfo(STI); +} + //===----------------------------------------------------------------------===// // Dwarf Management //===----------------------------------------------------------------------===// -/// GetDwarfFile - takes a file name an number to place in the dwarf file and +/// getDwarfFile - takes a file name an number to place in the dwarf file and /// directory tables. If the file number has already been allocated it is an /// error and zero is returned and the client reports the error, else the /// allocated file number is returned. The file numbers may be in any order. -unsigned MCContext::GetDwarfFile(StringRef Directory, StringRef FileName, +unsigned MCContext::getDwarfFile(StringRef Directory, StringRef FileName, unsigned FileNumber, unsigned CUID) { - // TODO: a FileNumber of zero says to use the next available file number. - // Note: in GenericAsmParser::ParseDirectiveFile() FileNumber was checked - // to not be less than one. This needs to be change to be not less than zero. - - SmallVectorImpl& MCDwarfFiles = MCDwarfFilesCUMap[CUID]; - SmallVectorImpl& MCDwarfDirs = MCDwarfDirsCUMap[CUID]; - // Make space for this FileNumber in the MCDwarfFiles vector if needed. - if (FileNumber >= MCDwarfFiles.size()) { - MCDwarfFiles.resize(FileNumber + 1); - } else { - MCDwarfFile *&ExistingFile = MCDwarfFiles[FileNumber]; - if (ExistingFile) - // It is an error to use see the same number more than once. - return 0; - } - - // Get the new MCDwarfFile slot for this FileNumber. - MCDwarfFile *&File = MCDwarfFiles[FileNumber]; - - if (Directory.empty()) { - // Separate the directory part from the basename of the FileName. - StringRef tFileName = sys::path::filename(FileName); - if (!tFileName.empty()) { - Directory = sys::path::parent_path(FileName); - if (!Directory.empty()) - FileName = tFileName; - } - } - - // Find or make a entry in the MCDwarfDirs vector for this Directory. - // Capture directory name. - unsigned DirIndex; - if (Directory.empty()) { - // For FileNames with no directories a DirIndex of 0 is used. - DirIndex = 0; - } else { - DirIndex = 0; - for (unsigned End = MCDwarfDirs.size(); DirIndex < End; DirIndex++) { - if (Directory == MCDwarfDirs[DirIndex]) - break; - } - if (DirIndex >= MCDwarfDirs.size()) { - char *Buf = static_cast(Allocate(Directory.size())); - memcpy(Buf, Directory.data(), Directory.size()); - MCDwarfDirs.push_back(StringRef(Buf, Directory.size())); - } - // The DirIndex is one based, as DirIndex of 0 is used for FileNames with - // no directories. MCDwarfDirs[] is unlike MCDwarfFiles[] in that the - // directory names are stored at MCDwarfDirs[DirIndex-1] where FileNames - // are stored at MCDwarfFiles[FileNumber].Name . - DirIndex++; - } - - // Now make the MCDwarfFile entry and place it in the slot in the MCDwarfFiles - // vector. - char *Buf = static_cast(Allocate(FileName.size())); - memcpy(Buf, FileName.data(), FileName.size()); - File = new (*this) MCDwarfFile(StringRef(Buf, FileName.size()), DirIndex); - - // return the allocated FileNumber. - return FileNumber; + MCDwarfLineTable &Table = MCDwarfLineTablesCUMap[CUID]; + return Table.getFile(Directory, FileName, FileNumber); } /// isValidDwarfFileNumber - takes a dwarf file number and returns true if it /// currently is assigned and false otherwise. bool MCContext::isValidDwarfFileNumber(unsigned FileNumber, unsigned CUID) { - SmallVectorImpl& MCDwarfFiles = MCDwarfFilesCUMap[CUID]; - if(FileNumber == 0 || FileNumber >= MCDwarfFiles.size()) + const SmallVectorImpl &MCDwarfFiles = getMCDwarfFiles(CUID); + if (FileNumber == 0 || FileNumber >= MCDwarfFiles.size()) return false; - return MCDwarfFiles[FileNumber] != 0; + return !MCDwarfFiles[FileNumber].Name.empty(); +} + +/// Remove empty sections from SectionStartEndSyms, to avoid generating +/// useless debug info for them. +void MCContext::finalizeDwarfSections(MCStreamer &MCOS) { + SectionsForRanges.remove_if( + [&](MCSection *Sec) { return !MCOS.mayHaveInstructions(*Sec); }); } -void MCContext::FatalError(SMLoc Loc, const Twine &Msg) { - // If we have a source manager and a location, use it. Otherwise just - // use the generic report_fatal_error(). - if (!SrcMgr || Loc == SMLoc()) - report_fatal_error(Msg); +//===----------------------------------------------------------------------===// +// Error Reporting +//===----------------------------------------------------------------------===// + +void MCContext::reportError(SMLoc Loc, const Twine &Msg) { + HadError = true; + + // If we have a source manager use it. Otherwise just use the generic + // report_fatal_error(). + if (!SrcMgr) + report_fatal_error(Msg, false); // Use the source manager to print the message. SrcMgr->PrintMessage(Loc, SourceMgr::DK_Error, Msg); +} + +void MCContext::reportFatalError(SMLoc Loc, const Twine &Msg) { + reportError(Loc, Msg); // If we reached here, we are failing ungracefully. Run the interrupt handlers // to make sure any special cleanups get done, in particular that we remove