#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"
#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 <map>
using namespace llvm;
-typedef std::pair<std::string, std::string> SectionGroupPair;
-
-typedef StringMap<const MCSectionMachO*> MachOUniqueMapTy;
-typedef std::map<SectionGroupPair, const MCSectionELF *> ELFUniqueMapTy;
-typedef std::map<SectionGroupPair, const MCSectionCOFF *> 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);
+ 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();
- MachOUniquingMap = 0;
- ELFUniquingMap = 0;
- COFFUniquingMap = 0;
-
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;
}
//===----------------------------------------------------------------------===//
//===----------------------------------------------------------------------===//
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);
+
+ assert(!NameRef.empty() && "Normal symbols cannot be unnamed!");
- // Do the lookup and get the entire StringMapEntry. We want access to the
- // key if we are creating the entry.
- StringMapEntry<MCSymbol*> &Entry = Symbols.GetOrCreateValue(Name);
- MCSymbol *Sym = Entry.getValue();
+ 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<MCSymbolELF>(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);
+}
- StringMapEntry<bool> *NameEntry = &UsedNames.GetOrCreateValue(Name);
- if (NameEntry->getValue()) {
- assert(isTemporary && "Cannot rename non-temporary symbols");
- SmallString<128> NewName = Name;
- do {
+MCSymbol *MCContext::createSymbolImpl(const StringMapEntry<bool> *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;
+ 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);
+}
+
+MCSymbol *MCContext::createTempSymbol(bool CanBeUnnamed) {
+ return createTempSymbol("tmp", true, CanBeUnnamed);
}
-unsigned MCContext::NextInstance(int64_t LocalLabelVal) {
+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;
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);
+}
+
+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<MCSectionELF *>(Section)->setSectionName(CachedName);
}
-const MCSectionELF *MCContext::
-getELFSection(StringRef Section, unsigned Type, unsigned Flags,
- SectionKind Kind) {
- return getELFSection(Section, Type, Flags, Kind, 0, "");
+MCSectionELF *MCContext::createELFRelSection(StringRef Name, unsigned Type,
+ unsigned Flags, unsigned EntrySize,
+ const MCSymbolELF *Group,
+ const MCSectionELF *Associated) {
+ StringMap<bool>::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);
}
-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::getELFSection(StringRef Section, unsigned Type,
+ unsigned Flags, unsigned EntrySize,
+ StringRef Group, unsigned UniqueID,
+ const char *BeginSymName) {
+ MCSymbolELF *GroupSym = nullptr;
+ if (!Group.empty())
+ GroupSym = cast<MCSymbolELF>(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<ELFUniqueMapTy::iterator, bool> 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();
+
+ MCSymbol *Begin = nullptr;
+ if (BeginSymName)
+ Begin = createTempSymbol(BeginSymName, false);
- MCSectionELF *Result = new (*this) MCSectionELF(
- Entry.first->first.first, Type, Flags, Kind, EntrySize, GroupSym);
- Entry.first->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::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<COFFUniqueMapTy::iterator, bool> 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<MCDwarfFile *>& MCDwarfFiles = MCDwarfFilesCUMap[CUID];
- SmallVectorImpl<StringRef>& 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<char *>(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<char *>(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<MCDwarfFile *>& MCDwarfFiles = MCDwarfFilesCUMap[CUID];
- if(FileNumber == 0 || FileNumber >= MCDwarfFiles.size())
+ const SmallVectorImpl<MCDwarfFile> &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
projects / oota-llvm.git / blobdiff