#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/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"
}
MCContext::~MCContext() {
-
if (AutoReset)
reset();
// 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;
}
//===----------------------------------------------------------------------===//
//===----------------------------------------------------------------------===//
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();
// Symbol Manipulation
//===----------------------------------------------------------------------===//
-MCSymbol *MCContext::GetOrCreateSymbol(const Twine &Name) {
+MCSymbol *MCContext::getOrCreateSymbol(const Twine &Name) {
SmallString<128> NameSV;
StringRef NameRef = Name.toStringRef(NameSV);
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;
MCSymbol *&OldSym = Symbols[Name];
if (OldSym && OldSym->isUndefined()) {
- Sym = OldSym;
- return OldSym;
+ Sym = cast<MCSymbolELF>(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;
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<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;
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;
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) {
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)
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);
// 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
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;
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<MCSectionELF*>(Section)->setSectionName(CachedName);
+ const_cast<MCSectionELF *>(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<bool>::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<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.
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;
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())
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;
// 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);
/// 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<MCDwarfFile>& MCDwarfFiles = getMCDwarfFiles(CUID);
- if(FileNumber == 0 || FileNumber >= MCDwarfFiles.size())
+ const SmallVectorImpl<MCDwarfFile> &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<const MCSection *, std::pair<MCSymbol *, MCSymbol *> >::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())
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