#include "llvm/MC/MCSymbol.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"
-using namespace llvm;
-
-typedef StringMap<const MCSectionMachO*> MachOUniqueMapTy;
-typedef StringMap<const MCSectionELF*> ELFUniqueMapTy;
-typedef StringMap<const MCSectionCOFF*> COFFUniqueMapTy;
+#include <map>
+using namespace llvm;
-MCContext::MCContext(const MCAsmInfo &mai, const MCRegisterInfo &mri,
+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),
- CompilationDir(llvm::sys::Path::GetCurrentDirectory().str()),
- CurrentDwarfLoc(0,0,0,DWARF2_FLAG_IS_STMT,0,0),
- DwarfLocSeen(false), GenDwarfForAssembly(false), GenDwarfFileNumber(0),
- AllowTemporaryLabels(true), DwarfCompileUnitID(0), AutoReset(DoAutoReset) {
-
- MachOUniquingMap = 0;
- ELFUniquingMap = 0;
- COFFUniquingMap = 0;
+ 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), DwarfVersion(4),
+ AllowTemporaryLabels(true), DwarfCompileUnitID(0),
+ AutoReset(DoAutoReset) {
+
+ 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 = "";
}
MCContext::~MCContext() {
// 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;
}
Symbols.clear();
Allocator.Reset();
Instances.clear();
- MCDwarfFilesCUMap.clear();
- MCDwarfDirsCUMap.clear();
+ MCDwarfLineTablesCUMap.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;
+ MachOUniquingMap.clear();
+ ELFUniquingMap.clear();
+ COFFUniquingMap.clear();
NextUniqueID = 0;
AllowTemporaryLabels = true;
// Determine whether this is an assembler temporary or normal label, if used.
bool isTemporary = false;
if (AllowTemporaryLabels)
- isTemporary = Name.startswith(MAI.getPrivateGlobalPrefix());
+ isTemporary = Name.startswith(MAI->getPrivateGlobalPrefix());
StringMapEntry<bool> *NameEntry = &UsedNames.GetOrCreateValue(Name);
if (NameEntry->getValue()) {
- assert(isTemporary && "Cannot rename non temporary symbols");
+ assert(isTemporary && "Cannot rename non-temporary symbols");
SmallString<128> NewName = Name;
do {
NewName.resize(Name.size());
MCSymbol *MCContext::GetOrCreateSymbol(const Twine &Name) {
SmallString<128> NameSV;
- Name.toVector(NameSV);
- return GetOrCreateSymbol(NameSV.str());
+ return GetOrCreateSymbol(Name.toStringRef(NameSV));
+}
+
+MCSymbol *MCContext::CreateLinkerPrivateTempSymbol() {
+ SmallString<128> NameSV;
+ raw_svector_ostream(NameSV)
+ << MAI->getLinkerPrivateGlobalPrefix() << "tmp" << NextUniqueID++;
+ return CreateSymbol(NameSV);
}
MCSymbol *MCContext::CreateTempSymbol() {
SmallString<128> NameSV;
raw_svector_ostream(NameSV)
- << MAI.getPrivateGlobalPrefix() << "tmp" << NextUniqueID++;
+ << MAI->getPrivateGlobalPrefix() << "tmp" << NextUniqueID++;
return CreateSymbol(NameSV);
}
-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();
+ 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::GetDirectionalLocalSymbol(unsigned LocalLabelVal,
+ bool Before) {
+ unsigned Instance = GetInstance(LocalLabelVal);
+ if (!Before)
+ ++Instance;
+ return getOrCreateDirectionalLocalSymbol(LocalLabelVal, Instance);
}
MCSymbol *MCContext::LookupSymbol(StringRef Name) const {
// 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()];
+ const MCSectionMachO *&Entry = MachOUniquingMap[Name.str()];
if (Entry) return Entry;
// Otherwise, return a new section.
return getELFSection(Section, Type, Flags, Kind, 0, "");
}
+void MCContext::renameELFSection(const MCSectionELF *Section, StringRef Name) {
+ StringRef GroupName;
+ if (const MCSymbol *Group = Section->getGroup())
+ GroupName = Group->getName();
+
+ ELFUniquingMap.erase(SectionGroupPair(Section->getSectionName(), GroupName));
+ auto I =
+ ELFUniquingMap.insert(std::make_pair(SectionGroupPair(Name, GroupName),
+ Section)).first;
+ StringRef CachedName = I->first.first;
+ const_cast<MCSectionELF*>(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;
-
// Do the lookup, if we have a hit, return it.
- StringMapEntry<const MCSectionELF*> &Entry = Map.GetOrCreateValue(Section);
- if (Entry.getValue()) return Entry.getValue();
+ auto IterBool = ELFUniquingMap.insert(
+ std::make_pair(SectionGroupPair(Section, Group), nullptr));
+ auto &Entry = *IterBool.first;
+ if (!IterBool.second) return Entry.second;
// Possibly refine the entry size first.
if (!EntrySize) {
EntrySize = MCSectionELF::DetermineEntrySize(Kind);
}
- MCSymbol *GroupSym = NULL;
+ MCSymbol *GroupSym = nullptr;
if (!Group.empty())
GroupSym = GetOrCreateSymbol(Group);
- MCSectionELF *Result = new (*this) MCSectionELF(Entry.getKey(), Type, Flags,
- Kind, EntrySize, GroupSym);
- Entry.setValue(Result);
+ StringRef CachedName = Entry.first.first;
+ MCSectionELF *Result = new (*this)
+ MCSectionELF(CachedName, Type, Flags, Kind, EntrySize, GroupSym);
+ Entry.second = Result;
return Result;
}
const MCSectionELF *MCContext::CreateELFGroupSection() {
MCSectionELF *Result =
new (*this) MCSectionELF(".group", ELF::SHT_GROUP, 0,
- SectionKind::getReadOnly(), 4, NULL);
+ SectionKind::getReadOnly(), 4, nullptr);
return Result;
}
-const MCSection *MCContext::getCOFFSection(StringRef Section,
- unsigned Characteristics,
- int Selection,
- SectionKind Kind) {
- if (COFFUniquingMap == 0)
- COFFUniquingMap = new COFFUniqueMapTy();
- COFFUniqueMapTy &Map = *(COFFUniqueMapTy*)COFFUniquingMap;
-
+const MCSectionCOFF *MCContext::getCOFFSection(StringRef Section,
+ unsigned Characteristics,
+ SectionKind Kind,
+ StringRef COMDATSymName,
+ int Selection) {
// Do the lookup, if we have a hit, return it.
- StringMapEntry<const MCSectionCOFF*> &Entry = Map.GetOrCreateValue(Section);
- if (Entry.getValue()) return Entry.getValue();
- MCSectionCOFF *Result = new (*this) MCSectionCOFF(Entry.getKey(),
- Characteristics,
- Selection, Kind);
+ SectionGroupPair P(Section, COMDATSymName);
+ auto IterBool = COFFUniquingMap.insert(std::make_pair(P, nullptr));
+ auto Iter = IterBool.first;
+ if (!IterBool.second)
+ return Iter->second;
+
+ const MCSymbol *COMDATSymbol = nullptr;
+ if (!COMDATSymName.empty())
+ COMDATSymbol = GetOrCreateSymbol(COMDATSymName);
- Entry.setValue(Result);
+ StringRef CachedName = Iter->first.first;
+ MCSectionCOFF *Result = new (*this)
+ MCSectionCOFF(CachedName, Characteristics, COMDATSymbol, Selection, Kind);
+
+ Iter->second = Result;
return Result;
}
+const MCSectionCOFF *
+MCContext::getCOFFSection(StringRef Section, unsigned Characteristics,
+ SectionKind Kind) {
+ return getCOFFSection(Section, Characteristics, Kind, "", 0);
+}
+
+const MCSectionCOFF *MCContext::getCOFFSection(StringRef Section) {
+ SectionGroupPair P(Section, "");
+ auto Iter = COFFUniquingMap.find(P);
+ if (Iter == COFFUniquingMap.end())
+ return nullptr;
+ return Iter->second;
+}
+
//===----------------------------------------------------------------------===//
// Dwarf Management
//===----------------------------------------------------------------------===//
/// allocated file number is returned. The file numbers may be in any order.
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.
-
- std::vector<MCDwarfFile *>& MCDwarfFiles = MCDwarfFilesCUMap[CUID];
- std::vector<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) {
- std::vector<MCDwarfFile *>& MCDwarfFiles = MCDwarfFilesCUMap[CUID];
+ const SmallVectorImpl<MCDwarfFile>& MCDwarfFiles = getMCDwarfFiles(CUID);
if(FileNumber == 0 || FileNumber >= MCDwarfFiles.size())
return false;
- return MCDwarfFiles[FileNumber] != 0;
+ return !MCDwarfFiles[FileNumber].Name.empty();
+}
+
+/// finalizeDwarfSections - Emit end symbols for each non-empty code section.
+/// Also 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);
+ }
+ }
}
-void MCContext::FatalError(SMLoc Loc, const Twine &Msg) {
+void MCContext::FatalError(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())
- report_fatal_error(Msg);
+ report_fatal_error(Msg, false);
// Use the source manager to print the message.
SrcMgr->PrintMessage(Loc, SourceMgr::DK_Error, Msg);
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