X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FMC%2FMCContext.cpp;h=2160b4ee80d65fec18bda809d72a824b7c860940;hb=1d1d5f60906cc89e0e46dbd51e85f622dc806a65;hp=2afa21219fc4dbddd43e240a64fdc44ce428e9d0;hpb=0bd11cd898ae3bda83ed5cfd81335534954905f5;p=oota-llvm.git diff --git a/lib/MC/MCContext.cpp b/lib/MC/MCContext.cpp index 2afa21219fc..2160b4ee80d 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" @@ -19,7 +20,10 @@ #include "llvm/MC/MCSectionELF.h" #include "llvm/MC/MCSectionMachO.h" #include "llvm/MC/MCStreamer.h" -#include "llvm/MC/MCSymbol.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" @@ -54,7 +58,6 @@ MCContext::MCContext(const MCAsmInfo *mai, const MCRegisterInfo *mri, } MCContext::~MCContext() { - if (AutoReset) reset(); @@ -62,7 +65,7 @@ MCContext::~MCContext() { // 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; + delete (raw_ostream *)SecureLog; } //===----------------------------------------------------------------------===// @@ -70,18 +73,24 @@ MCContext::~MCContext() { //===----------------------------------------------------------------------===// void MCContext::reset() { + // Call the destructors so the fragments are freed + COFFAllocator.DestroyAll(); + ELFAllocator.DestroyAll(); + MachOAllocator.DestroyAll(); + UsedNames.clear(); Symbols.clear(); + SectionSymbols.clear(); Allocator.Reset(); Instances.clear(); CompilationDir.clear(); MainFileName.clear(); MCDwarfLineTablesCUMap.clear(); - SectionStartEndSyms.clear(); + SectionsForRanges.clear(); MCGenDwarfLabelEntries.clear(); DwarfDebugFlags = StringRef(); DwarfCompileUnitID = 0; - CurrentDwarfLoc = MCDwarfLoc(0,0,0,DWARF2_FLAG_IS_STMT,0,0); + CurrentDwarfLoc = MCDwarfLoc(0, 0, 0, DWARF2_FLAG_IS_STMT, 0, 0); MachOUniquingMap.clear(); ELFUniquingMap.clear(); @@ -98,7 +107,7 @@ void MCContext::reset() { // Symbol Manipulation //===----------------------------------------------------------------------===// -MCSymbol *MCContext::GetOrCreateSymbol(const Twine &Name) { +MCSymbol *MCContext::getOrCreateSymbol(const Twine &Name) { SmallString<128> NameSV; StringRef NameRef = Name.toStringRef(NameSV); @@ -106,13 +115,13 @@ MCSymbol *MCContext::GetOrCreateSymbol(const Twine &Name) { MCSymbol *&Sym = Symbols[NameRef]; if (!Sym) - Sym = CreateSymbol(NameRef, false); + Sym = createSymbol(NameRef, false, false); return Sym; } -MCSymbol *MCContext::getOrCreateSectionSymbol(const MCSectionELF &Section) { - MCSymbol *&Sym = SectionSymbols[&Section]; +MCSymbolELF *MCContext::getOrCreateSectionSymbol(const MCSectionELF &Section) { + MCSymbolELF *&Sym = SectionSymbols[&Section]; if (Sym) return Sym; @@ -120,12 +129,12 @@ MCSymbol *MCContext::getOrCreateSectionSymbol(const MCSectionELF &Section) { MCSymbol *&OldSym = Symbols[Name]; if (OldSym && OldSym->isUndefined()) { - Sym = OldSym; - return OldSym; + Sym = cast(OldSym); + return Sym; } auto NameIter = UsedNames.insert(std::make_pair(Name, true)).first; - Sym = new (*this) MCSymbol(NameIter->getKey(), /*isTemporary*/ false); + Sym = new (&*NameIter, *this) MCSymbolELF(&*NameIter, /*isTemporary*/ false); if (!OldSym) OldSym = Sym; @@ -135,14 +144,45 @@ MCSymbol *MCContext::getOrCreateSectionSymbol(const MCSectionELF &Section) { MCSymbol *MCContext::getOrCreateFrameAllocSymbol(StringRef FuncName, unsigned Idx) { - return GetOrCreateSymbol(Twine(MAI->getPrivateGlobalPrefix()) + FuncName + + return getOrCreateSymbol(Twine(MAI->getPrivateGlobalPrefix()) + FuncName + "$frame_escape_" + Twine(Idx)); } -MCSymbol *MCContext::CreateSymbol(StringRef Name, bool AlwaysAddSuffix) { - // Determine whether this is an assembler temporary or normal label, if used. - bool IsTemporary = false; - if (AllowTemporaryLabels) +MCSymbol *MCContext::getOrCreateParentFrameOffsetSymbol(StringRef FuncName) { + return getOrCreateSymbol(Twine(MAI->getPrivateGlobalPrefix()) + FuncName + + "$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); +} + +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; @@ -157,9 +197,7 @@ MCSymbol *MCContext::CreateSymbol(StringRef Name, bool AlwaysAddSuffix) { 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. - MCSymbol *Result = - new (*this) MCSymbol(NameEntry.first->getKey(), IsTemporary); - return Result; + return createSymbolImpl(&*NameEntry.first, IsTemporary); } assert(IsTemporary && "Cannot rename non-temporary symbols"); AddSuffix = true; @@ -167,20 +205,21 @@ MCSymbol *MCContext::CreateSymbol(StringRef Name, bool AlwaysAddSuffix) { llvm_unreachable("Infinite loop"); } -MCSymbol *MCContext::createTempSymbol(const Twine &Name, bool AlwaysAddSuffix) { +MCSymbol *MCContext::createTempSymbol(const Twine &Name, bool AlwaysAddSuffix, + bool CanBeUnnamed) { SmallString<128> NameSV; raw_svector_ostream(NameSV) << MAI->getPrivateGlobalPrefix() << Name; - return CreateSymbol(NameSV, AlwaysAddSuffix); + return createSymbol(NameSV, AlwaysAddSuffix, CanBeUnnamed); } -MCSymbol *MCContext::CreateLinkerPrivateTempSymbol() { +MCSymbol *MCContext::createLinkerPrivateTempSymbol() { SmallString<128> NameSV; raw_svector_ostream(NameSV) << MAI->getLinkerPrivateGlobalPrefix() << "tmp"; - return CreateSymbol(NameSV, true); + return createSymbol(NameSV, true, false); } -MCSymbol *MCContext::CreateTempSymbol() { - return createTempSymbol("tmp", true); +MCSymbol *MCContext::createTempSymbol(bool CanBeUnnamed) { + return createTempSymbol("tmp", true, CanBeUnnamed); } unsigned MCContext::NextInstance(unsigned LocalLabelVal) { @@ -201,16 +240,16 @@ MCSymbol *MCContext::getOrCreateDirectionalLocalSymbol(unsigned LocalLabelVal, unsigned Instance) { MCSymbol *&Sym = LocalSymbols[std::make_pair(LocalLabelVal, Instance)]; if (!Sym) - Sym = CreateTempSymbol(); + Sym = createTempSymbol(false); return Sym; } -MCSymbol *MCContext::CreateDirectionalLocalSymbol(unsigned LocalLabelVal) { +MCSymbol *MCContext::createDirectionalLocalSymbol(unsigned LocalLabelVal) { unsigned Instance = NextInstance(LocalLabelVal); return getOrCreateDirectionalLocalSymbol(LocalLabelVal, Instance); } -MCSymbol *MCContext::GetDirectionalLocalSymbol(unsigned LocalLabelVal, +MCSymbol *MCContext::getDirectionalLocalSymbol(unsigned LocalLabelVal, bool Before) { unsigned Instance = GetInstance(LocalLabelVal); if (!Before) @@ -218,7 +257,7 @@ MCSymbol *MCContext::GetDirectionalLocalSymbol(unsigned LocalLabelVal, return getOrCreateDirectionalLocalSymbol(LocalLabelVal, Instance); } -MCSymbol *MCContext::LookupSymbol(const Twine &Name) const { +MCSymbol *MCContext::lookupSymbol(const Twine &Name) const { SmallString<128> NameSV; StringRef NameRef = Name.toStringRef(NameSV); return Symbols.lookup(NameRef); @@ -228,10 +267,10 @@ MCSymbol *MCContext::LookupSymbol(const Twine &Name) const { // Section Management //===----------------------------------------------------------------------===// -const MCSectionMachO * -MCContext::getMachOSection(StringRef Segment, StringRef Section, - unsigned TypeAndAttributes, unsigned Reserved2, - SectionKind Kind, const char *BeginSymName) { +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 @@ -244,7 +283,7 @@ MCContext::getMachOSection(StringRef Segment, StringRef Section, Name += Section; // Do the lookup, if we have a hit, return it. - const MCSectionMachO *&Entry = MachOUniquingMap[Name]; + MCSectionMachO *&Entry = MachOUniquingMap[Name]; if (Entry) return Entry; @@ -253,55 +292,67 @@ MCContext::getMachOSection(StringRef Segment, StringRef Section, Begin = createTempSymbol(BeginSymName, false); // Otherwise, return a new section. - return Entry = new (*this) MCSectionMachO(Segment, Section, TypeAndAttributes, - Reserved2, Kind, Begin); -} - -const MCSectionELF *MCContext::getELFSection(StringRef Section, unsigned Type, - unsigned Flags, - const char *BeginSymName) { - return getELFSection(Section, Type, Flags, 0, "", BeginSymName); + return Entry = new (MachOAllocator.Allocate()) MCSectionMachO( + Segment, Section, TypeAndAttributes, Reserved2, Kind, Begin); } -void MCContext::renameELFSection(const MCSectionELF *Section, StringRef Name) { +void MCContext::renameELFSection(MCSectionELF *Section, StringRef Name) { StringRef GroupName; if (const MCSymbol *Group = Section->getGroup()) GroupName = Group->getName(); - ELFUniquingMap.erase(ELFSectionKey{Section->getSectionName(), GroupName}); - auto I = ELFUniquingMap.insert(std::make_pair(ELFSectionKey{Name, GroupName}, - Section)).first; + 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_cast(Section)->setSectionName(CachedName); } -const MCSectionELF * -MCContext::createELFRelSection(StringRef Name, unsigned Type, unsigned Flags, - unsigned EntrySize, const MCSymbol *Group) { +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 (*this) + return new (ELFAllocator.Allocate()) MCSectionELF(I->getKey(), Type, Flags, SectionKind::getReadOnly(), - EntrySize, Group, true, nullptr); + EntrySize, Group, true, nullptr, Associated); } -const MCSectionELF *MCContext::getELFSection(StringRef Section, unsigned Type, - unsigned Flags, unsigned EntrySize, - StringRef Group, bool Unique, - const char *BeginSymName) { +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. auto IterBool = ELFUniquingMap.insert( - std::make_pair(ELFSectionKey{Section, Group}, nullptr)); + std::make_pair(ELFSectionKey{Section, Group, UniqueID}, nullptr)); auto &Entry = *IterBool.first; - if (!IterBool.second && !Unique) + if (!IterBool.second) return Entry.second; - MCSymbol *GroupSym = nullptr; - if (!Group.empty()) - GroupSym = GetOrCreateSymbol(Group); - StringRef CachedName = Entry.first.SectionName; SectionKind Kind; @@ -314,64 +365,58 @@ const MCSectionELF *MCContext::getELFSection(StringRef Section, unsigned Type, if (BeginSymName) Begin = createTempSymbol(BeginSymName, false); - MCSectionELF *Result = new (*this) MCSectionELF( - CachedName, Type, Flags, Kind, EntrySize, GroupSym, Unique, Begin); - if (!Unique) - Entry.second = Result; + MCSectionELF *Result = new (ELFAllocator.Allocate()) + MCSectionELF(CachedName, Type, Flags, Kind, EntrySize, GroupSym, UniqueID, + Begin, Associated); + Entry.second = Result; return Result; } -const MCSectionELF *MCContext::getELFSection(StringRef Section, unsigned Type, - unsigned Flags, unsigned EntrySize, - StringRef Group, - const char *BeginSymName) { - return getELFSection(Section, Type, Flags, EntrySize, Group, false, - BeginSymName); -} - -const MCSectionELF *MCContext::CreateELFGroupSection() { - MCSectionELF *Result = new (*this) +MCSectionELF *MCContext::createELFGroupSection(const MCSymbolELF *Group) { + MCSectionELF *Result = new (ELFAllocator.Allocate()) MCSectionELF(".group", ELF::SHT_GROUP, 0, SectionKind::getReadOnly(), 4, - nullptr, false, nullptr); + Group, ~0, nullptr, nullptr); return Result; } -const MCSectionCOFF * -MCContext::getCOFFSection(StringRef Section, unsigned Characteristics, - SectionKind Kind, StringRef COMDATSymName, - int Selection, const char *BeginSymName) { - // Do the lookup, if we have a hit, return it. +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. COFFSectionKey T{Section, COMDATSymName, Selection}; auto IterBool = COFFUniquingMap.insert(std::make_pair(T, nullptr)); auto Iter = IterBool.first; if (!IterBool.second) return Iter->second; - MCSymbol *COMDATSymbol = nullptr; - if (!COMDATSymName.empty()) - COMDATSymbol = GetOrCreateSymbol(COMDATSymName); - MCSymbol *Begin = nullptr; if (BeginSymName) Begin = createTempSymbol(BeginSymName, false); StringRef CachedName = Iter->first.SectionName; - MCSectionCOFF *Result = new (*this) MCSectionCOFF( + 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, - const char *BeginSymName) { +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) { +MCSectionCOFF *MCContext::getCOFFSection(StringRef Section) { COFFSectionKey T{Section, "", 0}; auto Iter = COFFUniquingMap.find(T); if (Iter == COFFUniquingMap.end()) @@ -379,9 +424,8 @@ const MCSectionCOFF *MCContext::getCOFFSection(StringRef Section) { return Iter->second; } -const MCSectionCOFF * -MCContext::getAssociativeCOFFSection(const MCSectionCOFF *Sec, - const MCSymbol *KeySym) { +MCSectionCOFF *MCContext::getAssociativeCOFFSection(MCSectionCOFF *Sec, + const MCSymbol *KeySym) { // Return the normal section if we don't have to be associative. if (!KeySym) return Sec; @@ -399,11 +443,11 @@ MCContext::getAssociativeCOFFSection(const MCSectionCOFF *Sec, // 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) { MCDwarfLineTable &Table = MCDwarfLineTablesCUMap[CUID]; return Table.getFile(Directory, FileName, FileNumber); @@ -412,37 +456,21 @@ unsigned MCContext::GetDwarfFile(StringRef Directory, StringRef FileName, /// isValidDwarfFileNumber - takes a dwarf file number and returns true if it /// currently is assigned and false otherwise. bool MCContext::isValidDwarfFileNumber(unsigned FileNumber, unsigned CUID) { - const SmallVectorImpl& MCDwarfFiles = getMCDwarfFiles(CUID); - if(FileNumber == 0 || FileNumber >= MCDwarfFiles.size()) + const SmallVectorImpl &MCDwarfFiles = getMCDwarfFiles(CUID); + if (FileNumber == 0 || FileNumber >= MCDwarfFiles.size()) return false; return !MCDwarfFiles[FileNumber].Name.empty(); } -/// finalizeDwarfSections - Emit end symbols for each non-empty code section. -/// Also remove empty sections from SectionStartEndSyms, to avoid generating +/// Remove empty sections from SectionStartEndSyms, to avoid generating /// useless debug info for them. void MCContext::finalizeDwarfSections(MCStreamer &MCOS) { - MCContext &context = MCOS.getContext(); - - auto sec = SectionStartEndSyms.begin(); - while (sec != SectionStartEndSyms.end()) { - assert(sec->second.first && "Start symbol must be set by now"); - MCOS.SwitchSection(sec->first); - if (MCOS.mayHaveInstructions()) { - MCSymbol *SectionEndSym = context.CreateTempSymbol(); - MCOS.EmitLabel(SectionEndSym); - sec->second.second = SectionEndSym; - ++sec; - } else { - MapVector >::iterator - to_erase = sec; - sec = SectionStartEndSyms.erase(to_erase); - } - } + SectionsForRanges.remove_if( + [&](MCSection *Sec) { return !MCOS.mayHaveInstructions(*Sec); }); } -void MCContext::FatalError(SMLoc Loc, const Twine &Msg) const { +void MCContext::reportFatalError(SMLoc Loc, const Twine &Msg) const { // If we have a source manager and a location, use it. Otherwise just // use the generic report_fatal_error(). if (!SrcMgr || Loc == SMLoc())