1 files changed, 108 insertions, 73 deletions

diff --git a/contrib/llvm/lib/MC/MCDwarf.cpp b/contrib/llvm/lib/MC/MCDwarf.cpp
index 5effb01..90f96e2 100644
--- a/contrib/llvm/lib/MC/MCDwarf.cpp
+++ b/contrib/llvm/lib/MC/MCDwarf.cpp
@@ -64,12 +64,12 @@ static inline uint64_t ScaleAddrDelta(MCContext &Context, uint64_t AddrDelta) {
 // and if there is information from the last .loc directive that has yet to have
 // a line entry made for it is made.
 //
-void MCLineEntry::Make(MCObjectStreamer *MCOS, const MCSection *Section) {
+void MCLineEntry::Make(MCObjectStreamer *MCOS, MCSection *Section) {
   if (!MCOS->getContext().getDwarfLocSeen())
     return;
 
   // Create a symbol at in the current section for use in the line entry.
-  MCSymbol *LineSym = MCOS->getContext().CreateTempSymbol();
+  MCSymbol *LineSym = MCOS->getContext().createTempSymbol();
   // Set the value of the symbol to use for the MCLineEntry.
   MCOS->EmitLabel(LineSym);
 
@@ -80,7 +80,7 @@ void MCLineEntry::Make(MCObjectStreamer *MCOS, const MCSection *Section) {
   MCLineEntry LineEntry(LineSym, DwarfLoc);
 
   // clear DwarfLocSeen saying the current .loc info is now used.
-  MCOS->getContext().ClearDwarfLocSeen();
+  MCOS->getContext().clearDwarfLocSeen();
 
   // Add the line entry to this section's entries.
   MCOS->getContext()
@@ -98,15 +98,15 @@ static inline const MCExpr *MakeStartMinusEndExpr(const MCStreamer &MCOS,
                                                   int IntVal) {
   MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
   const MCExpr *Res =
-    MCSymbolRefExpr::Create(&End, Variant, MCOS.getContext());
+    MCSymbolRefExpr::create(&End, Variant, MCOS.getContext());
   const MCExpr *RHS =
-    MCSymbolRefExpr::Create(&Start, Variant, MCOS.getContext());
+    MCSymbolRefExpr::create(&Start, Variant, MCOS.getContext());
   const MCExpr *Res1 =
-    MCBinaryExpr::Create(MCBinaryExpr::Sub, Res, RHS, MCOS.getContext());
+    MCBinaryExpr::create(MCBinaryExpr::Sub, Res, RHS, MCOS.getContext());
   const MCExpr *Res2 =
-    MCConstantExpr::Create(IntVal, MCOS.getContext());
+    MCConstantExpr::create(IntVal, MCOS.getContext());
   const MCExpr *Res3 =
-    MCBinaryExpr::Create(MCBinaryExpr::Sub, Res1, Res2, MCOS.getContext());
+    MCBinaryExpr::create(MCBinaryExpr::Sub, Res1, Res2, MCOS.getContext());
   return Res3;
 }
 
@@ -115,7 +115,7 @@ static inline const MCExpr *MakeStartMinusEndExpr(const MCStreamer &MCOS,
 // in the LineSection.
 //
 static inline void
-EmitDwarfLineTable(MCObjectStreamer *MCOS, const MCSection *Section,
+EmitDwarfLineTable(MCObjectStreamer *MCOS, MCSection *Section,
                    const MCLineSection::MCLineEntryCollection &LineEntries) {
   unsigned FileNum = 1;
   unsigned LastLine = 1;
@@ -179,28 +179,19 @@ EmitDwarfLineTable(MCObjectStreamer *MCOS, const MCSection *Section,
   }
 
   // Emit a DW_LNE_end_sequence for the end of the section.
-  // Using the pointer Section create a temporary label at the end of the
-  // section and use that and the LastLabel to compute the address delta
-  // and use INT64_MAX as the line delta which is the signal that this is
-  // actually a DW_LNE_end_sequence.
+  // Use the section end label to compute the address delta and use INT64_MAX
+  // as the line delta which is the signal that this is actually a
+  // DW_LNE_end_sequence.
+  MCSymbol *SectionEnd = MCOS->endSection(Section);
 
-  // Switch to the section to be able to create a symbol at its end.
-  // TODO: keep track of the last subsection so that this symbol appears in the
-  // correct place.
-  MCOS->SwitchSection(Section);
+  // Switch back the dwarf line section, in case endSection had to switch the
+  // section.
+  MCContext &Ctx = MCOS->getContext();
+  MCOS->SwitchSection(Ctx.getObjectFileInfo()->getDwarfLineSection());
 
-  MCContext &context = MCOS->getContext();
-  // Create a symbol at the end of the section.
-  MCSymbol *SectionEnd = context.CreateTempSymbol();
-  // Set the value of the symbol, as we are at the end of the section.
-  MCOS->EmitLabel(SectionEnd);
-
-  // Switch back the dwarf line section.
-  MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfLineSection());
-
-  const MCAsmInfo *asmInfo = MCOS->getContext().getAsmInfo();
+  const MCAsmInfo *AsmInfo = Ctx.getAsmInfo();
   MCOS->EmitDwarfAdvanceLineAddr(INT64_MAX, LastLabel, SectionEnd,
-                                 asmInfo->getPointerSize());
+                                 AsmInfo->getPointerSize());
 }
 
 //
@@ -243,7 +234,8 @@ std::pair<MCSymbol *, MCSymbol *> MCDwarfLineTableHeader::Emit(MCStreamer *MCOS)
       0, // length of DW_LNS_set_epilogue_begin
       1  // DW_LNS_set_isa
   };
-  assert(array_lengthof(StandardOpcodeLengths) == (DWARF2_LINE_OPCODE_BASE - 1));
+  assert(array_lengthof(StandardOpcodeLengths) ==
+         (DWARF2_LINE_OPCODE_BASE - 1));
   return Emit(MCOS, StandardOpcodeLengths);
 }
 
@@ -253,9 +245,9 @@ static const MCExpr *forceExpAbs(MCStreamer &OS, const MCExpr* Expr) {
   if (Context.getAsmInfo()->hasAggressiveSymbolFolding())
     return Expr;
 
-  MCSymbol *ABS = Context.CreateTempSymbol();
+  MCSymbol *ABS = Context.createTempSymbol();
   OS.EmitAssignment(ABS, Expr);
-  return MCSymbolRefExpr::Create(ABS, Context);
+  return MCSymbolRefExpr::create(ABS, Context);
 }
 
 static void emitAbsValue(MCStreamer &OS, const MCExpr *Value, unsigned Size) {
@@ -272,12 +264,12 @@ MCDwarfLineTableHeader::Emit(MCStreamer *MCOS,
   // Create a symbol at the beginning of the line table.
   MCSymbol *LineStartSym = Label;
   if (!LineStartSym)
-    LineStartSym = context.CreateTempSymbol();
+    LineStartSym = context.createTempSymbol();
   // Set the value of the symbol, as we are at the start of the line table.
   MCOS->EmitLabel(LineStartSym);
 
   // Create a symbol for the end of the section (to be set when we get there).
-  MCSymbol *LineEndSym = context.CreateTempSymbol();
+  MCSymbol *LineEndSym = context.createTempSymbol();
 
   // The first 4 bytes is the total length of the information for this
   // compilation unit (not including these 4 bytes for the length).
@@ -288,7 +280,7 @@ MCDwarfLineTableHeader::Emit(MCStreamer *MCOS,
   MCOS->EmitIntValue(2, 2);
 
   // Create a symbol for the end of the prologue (to be set when we get there).
-  MCSymbol *ProEndSym = context.CreateTempSymbol(); // Lprologue_end
+  MCSymbol *ProEndSym = context.createTempSymbol(); // Lprologue_end
 
   // Length of the prologue, is the next 4 bytes.  Which is the start of the
   // section to the end of the prologue.  Not including the 4 bytes for the
@@ -368,8 +360,10 @@ unsigned MCDwarfLineTableHeader::getFile(StringRef &Directory,
     FileNumber = SourceIdMap.size() + 1;
     assert((MCDwarfFiles.empty() || FileNumber == MCDwarfFiles.size()) &&
            "Don't mix autonumbered and explicit numbered line table usage");
+    SmallString<256> Buffer;
     auto IterBool = SourceIdMap.insert(
-        std::make_pair((Directory + Twine('\0') + FileName).str(), FileNumber));
+        std::make_pair((Directory + Twine('\0') + FileName).toStringRef(Buffer),
+                       FileNumber));
     if (!IterBool.second)
       return IterBool.first->second;
   }
@@ -446,7 +440,7 @@ void MCDwarfLineAddr::Encode(MCContext &Context, int64_t LineDelta,
   if (LineDelta == INT64_MAX) {
     if (AddrDelta == MAX_SPECIAL_ADDR_DELTA)
       OS << char(dwarf::DW_LNS_const_add_pc);
-    else {
+    else if (AddrDelta) {
       OS << char(dwarf::DW_LNS_advance_pc);
       encodeULEB128(AddrDelta, OS);
     }
@@ -616,13 +610,13 @@ static void EmitGenDwarfAranges(MCStreamer *MCOS,
 
   // Now emit the table of pairs of PointerSize'ed values for the section
   // addresses and sizes.
-  for (const auto &sec : Sections) {
-    MCSymbol *StartSymbol = sec.second.first;
-    MCSymbol *EndSymbol = sec.second.second;
+  for (MCSection *Sec : Sections) {
+    const MCSymbol *StartSymbol = Sec->getBeginSymbol();
+    MCSymbol *EndSymbol = Sec->getEndSymbol(context);
     assert(StartSymbol && "StartSymbol must not be NULL");
     assert(EndSymbol && "EndSymbol must not be NULL");
 
-    const MCExpr *Addr = MCSymbolRefExpr::Create(
+    const MCExpr *Addr = MCSymbolRefExpr::create(
       StartSymbol, MCSymbolRefExpr::VK_None, context);
     const MCExpr *Size = MakeStartMinusEndExpr(*MCOS,
       *StartSymbol, *EndSymbol, 0);
@@ -648,9 +642,9 @@ static void EmitGenDwarfInfo(MCStreamer *MCOS,
 
   // Create a symbol at the start and end of this section used in here for the
   // expression to calculate the length in the header.
-  MCSymbol *InfoStart = context.CreateTempSymbol();
+  MCSymbol *InfoStart = context.createTempSymbol();
   MCOS->EmitLabel(InfoStart);
-  MCSymbol *InfoEnd = context.CreateTempSymbol();
+  MCSymbol *InfoEnd = context.createTempSymbol();
 
   // First part: the header.
 
@@ -705,18 +699,18 @@ static void EmitGenDwarfInfo(MCStreamer *MCOS,
     const auto TextSection = Sections.begin();
     assert(TextSection != Sections.end() && "No text section found");
 
-    MCSymbol *StartSymbol = TextSection->second.first;
-    MCSymbol *EndSymbol = TextSection->second.second;
+    MCSymbol *StartSymbol = (*TextSection)->getBeginSymbol();
+    MCSymbol *EndSymbol = (*TextSection)->getEndSymbol(context);
     assert(StartSymbol && "StartSymbol must not be NULL");
     assert(EndSymbol && "EndSymbol must not be NULL");
 
     // AT_low_pc, the first address of the default .text section.
-    const MCExpr *Start = MCSymbolRefExpr::Create(
+    const MCExpr *Start = MCSymbolRefExpr::create(
         StartSymbol, MCSymbolRefExpr::VK_None, context);
     MCOS->EmitValue(Start, AddrSize);
 
     // AT_high_pc, the last address of the default .text section.
-    const MCExpr *End = MCSymbolRefExpr::Create(
+    const MCExpr *End = MCSymbolRefExpr::create(
       EndSymbol, MCSymbolRefExpr::VK_None, context);
     MCOS->EmitValue(End, AddrSize);
   }
@@ -778,7 +772,7 @@ static void EmitGenDwarfInfo(MCStreamer *MCOS,
     MCOS->EmitIntValue(Entry.getLineNumber(), 4);
 
     // AT_low_pc, start address of the label.
-    const MCExpr *AT_low_pc = MCSymbolRefExpr::Create(Entry.getLabel(),
+    const MCExpr *AT_low_pc = MCSymbolRefExpr::create(Entry.getLabel(),
                                              MCSymbolRefExpr::VK_None, context);
     MCOS->EmitValue(AT_low_pc, AddrSize);
 
@@ -811,15 +805,14 @@ static void EmitGenDwarfRanges(MCStreamer *MCOS) {
 
   MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfRangesSection());
 
-  for (const auto sec : Sections) {
-
-    MCSymbol *StartSymbol = sec.second.first;
-    MCSymbol *EndSymbol = sec.second.second;
+  for (MCSection *Sec : Sections) {
+    const MCSymbol *StartSymbol = Sec->getBeginSymbol();
+    MCSymbol *EndSymbol = Sec->getEndSymbol(context);
     assert(StartSymbol && "StartSymbol must not be NULL");
     assert(EndSymbol && "EndSymbol must not be NULL");
 
     // Emit a base address selection entry for the start of this section
-    const MCExpr *SectionStartAddr = MCSymbolRefExpr::Create(
+    const MCExpr *SectionStartAddr = MCSymbolRefExpr::create(
       StartSymbol, MCSymbolRefExpr::VK_None, context);
     MCOS->EmitFill(AddrSize, 0xFF);
     MCOS->EmitValue(SectionStartAddr, AddrSize);
@@ -871,18 +864,18 @@ void MCGenDwarfInfo::Emit(MCStreamer *MCOS) {
 
   MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfInfoSection());
   if (CreateDwarfSectionSymbols) {
-    InfoSectionSymbol = context.CreateTempSymbol();
+    InfoSectionSymbol = context.createTempSymbol();
     MCOS->EmitLabel(InfoSectionSymbol);
   }
   MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfAbbrevSection());
   if (CreateDwarfSectionSymbols) {
-    AbbrevSectionSymbol = context.CreateTempSymbol();
+    AbbrevSectionSymbol = context.createTempSymbol();
     MCOS->EmitLabel(AbbrevSectionSymbol);
   }
   if (UseRangesSection) {
     MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfRangesSection());
     if (CreateDwarfSectionSymbols) {
-      RangesSectionSymbol = context.CreateTempSymbol();
+      RangesSectionSymbol = context.createTempSymbol();
       MCOS->EmitLabel(RangesSectionSymbol);
     }
   }
@@ -940,7 +933,7 @@ void MCGenDwarfLabelEntry::Make(MCSymbol *Symbol, MCStreamer *MCOS,
   // values so that they don't have things like an ARM thumb bit from the
   // original symbol. So when used they won't get a low bit set after
   // relocation.
-  MCSymbol *Label = context.CreateTempSymbol();
+  MCSymbol *Label = context.createTempSymbol();
   MCOS->EmitLabel(Label);
 
   // Create and entry for the info and add it to the other entries.
@@ -1007,11 +1000,13 @@ static void EmitPersonality(MCStreamer &streamer, const MCSymbol &symbol,
 namespace {
   class FrameEmitterImpl {
     int CFAOffset;
+    int InitialCFAOffset;
     bool IsEH;
     const MCSymbol *SectionStart;
   public:
     FrameEmitterImpl(bool isEH)
-        : CFAOffset(0), IsEH(isEH), SectionStart(nullptr) {}
+        : CFAOffset(0), InitialCFAOffset(0), IsEH(isEH), SectionStart(nullptr) {
+    }
 
     void setSectionStart(const MCSymbol *Label) { SectionStart = Label; }
 
@@ -1045,11 +1040,16 @@ static void emitEncodingByte(MCObjectStreamer &Streamer, unsigned Encoding) {
 void FrameEmitterImpl::EmitCFIInstruction(MCObjectStreamer &Streamer,
                                           const MCCFIInstruction &Instr) {
   int dataAlignmentFactor = getDataAlignmentFactor(Streamer);
+  auto *MRI = Streamer.getContext().getRegisterInfo();
 
   switch (Instr.getOperation()) {
   case MCCFIInstruction::OpRegister: {
     unsigned Reg1 = Instr.getRegister();
     unsigned Reg2 = Instr.getRegister2();
+    if (!IsEH) {
+      Reg1 = MRI->getDwarfRegNum(MRI->getLLVMRegNum(Reg1, true), false);
+      Reg2 = MRI->getDwarfRegNum(MRI->getLLVMRegNum(Reg2, true), false);
+    }
     Streamer.EmitIntValue(dwarf::DW_CFA_register, 1);
     Streamer.EmitULEB128IntValue(Reg1);
     Streamer.EmitULEB128IntValue(Reg2);
@@ -1082,8 +1082,11 @@ void FrameEmitterImpl::EmitCFIInstruction(MCObjectStreamer &Streamer,
     return;
   }
   case MCCFIInstruction::OpDefCfa: {
+    unsigned Reg = Instr.getRegister();
+    if (!IsEH)
+      Reg = MRI->getDwarfRegNum(MRI->getLLVMRegNum(Reg, true), false);
     Streamer.EmitIntValue(dwarf::DW_CFA_def_cfa, 1);
-    Streamer.EmitULEB128IntValue(Instr.getRegister());
+    Streamer.EmitULEB128IntValue(Reg);
     CFAOffset = -Instr.getOffset();
     Streamer.EmitULEB128IntValue(CFAOffset);
 
@@ -1091,8 +1094,11 @@ void FrameEmitterImpl::EmitCFIInstruction(MCObjectStreamer &Streamer,
   }
 
   case MCCFIInstruction::OpDefCfaRegister: {
+    unsigned Reg = Instr.getRegister();
+    if (!IsEH)
+      Reg = MRI->getDwarfRegNum(MRI->getLLVMRegNum(Reg, true), false);
     Streamer.EmitIntValue(dwarf::DW_CFA_def_cfa_register, 1);
-    Streamer.EmitULEB128IntValue(Instr.getRegister());
+    Streamer.EmitULEB128IntValue(Reg);
 
     return;
   }
@@ -1103,6 +1109,9 @@ void FrameEmitterImpl::EmitCFIInstruction(MCObjectStreamer &Streamer,
       Instr.getOperation() == MCCFIInstruction::OpRelOffset;
 
     unsigned Reg = Instr.getRegister();
+    if (!IsEH)
+      Reg = MRI->getDwarfRegNum(MRI->getLLVMRegNum(Reg, true), false);
+
     int Offset = Instr.getOffset();
     if (IsRelative)
       Offset -= CFAOffset;
@@ -1136,6 +1145,8 @@ void FrameEmitterImpl::EmitCFIInstruction(MCObjectStreamer &Streamer,
   }
   case MCCFIInstruction::OpRestore: {
     unsigned Reg = Instr.getRegister();
+    if (!IsEH)
+      Reg = MRI->getDwarfRegNum(MRI->getLLVMRegNum(Reg, true), false);
     Streamer.EmitIntValue(dwarf::DW_CFA_restore | Reg, 1);
     return;
   }
@@ -1234,6 +1245,20 @@ void FrameEmitterImpl::EmitCompactUnwind(MCObjectStreamer &Streamer,
     Streamer.EmitIntValue(0, Size); // No LSDA
 }
 
+static unsigned getCIEVersion(bool IsEH, unsigned DwarfVersion) {
+  if (IsEH)
+    return 1;
+  switch (DwarfVersion) {
+  case 2:
+    return 1;
+  case 3:
+    return 3;
+  case 4:
+    return 4;
+  }
+  llvm_unreachable("Unknown version");
+}
+
 const MCSymbol &FrameEmitterImpl::EmitCIE(MCObjectStreamer &streamer,
                                           const MCSymbol *personality,
                                           unsigned personalityEncoding,
@@ -1245,10 +1270,10 @@ const MCSymbol &FrameEmitterImpl::EmitCIE(MCObjectStreamer &streamer,
   const MCRegisterInfo *MRI = context.getRegisterInfo();
   const MCObjectFileInfo *MOFI = context.getObjectFileInfo();
 
-  MCSymbol *sectionStart = context.CreateTempSymbol();
+  MCSymbol *sectionStart = context.createTempSymbol();
   streamer.EmitLabel(sectionStart);
 
-  MCSymbol *sectionEnd = context.CreateTempSymbol();
+  MCSymbol *sectionEnd = context.createTempSymbol();
 
   // Length
   const MCExpr *Length = MakeStartMinusEndExpr(streamer, *sectionStart,
@@ -1260,9 +1285,7 @@ const MCSymbol &FrameEmitterImpl::EmitCIE(MCObjectStreamer &streamer,
   streamer.EmitIntValue(CIE_ID, 4);
 
   // Version
-  // For DWARF2, we use CIE version 1
-  // For DWARF3+, we use CIE version 3
-  uint8_t CIEVersion = context.getDwarfVersion() <= 2 ? 1 : 3;
+  uint8_t CIEVersion = getCIEVersion(IsEH, context.getDwarfVersion());
   streamer.EmitIntValue(CIEVersion, 1);
 
   // Augmentation String
@@ -1276,10 +1299,18 @@ const MCSymbol &FrameEmitterImpl::EmitCIE(MCObjectStreamer &streamer,
     Augmentation += "R";
     if (IsSignalFrame)
       Augmentation += "S";
-    streamer.EmitBytes(Augmentation.str());
+    streamer.EmitBytes(Augmentation);
   }
   streamer.EmitIntValue(0, 1);
 
+  if (CIEVersion >= 4) {
+    // Address Size
+    streamer.EmitIntValue(context.getAsmInfo()->getPointerSize(), 1);
+
+    // Segment Descriptor Size
+    streamer.EmitIntValue(0, 1);
+  }
+
   // Code Alignment Factor
   streamer.EmitULEB128IntValue(context.getAsmInfo()->getMinInstAlignment());
 
@@ -1290,10 +1321,10 @@ const MCSymbol &FrameEmitterImpl::EmitCIE(MCObjectStreamer &streamer,
   if (CIEVersion == 1) {
     assert(MRI->getRARegister() <= 255 &&
            "DWARF 2 encodes return_address_register in one byte");
-    streamer.EmitIntValue(MRI->getDwarfRegNum(MRI->getRARegister(), true), 1);
+    streamer.EmitIntValue(MRI->getDwarfRegNum(MRI->getRARegister(), IsEH), 1);
   } else {
     streamer.EmitULEB128IntValue(
-        MRI->getDwarfRegNum(MRI->getRARegister(), true));
+        MRI->getDwarfRegNum(MRI->getRARegister(), IsEH));
   }
 
   // Augmentation Data Length (optional)
@@ -1337,6 +1368,8 @@ const MCSymbol &FrameEmitterImpl::EmitCIE(MCObjectStreamer &streamer,
     EmitCFIInstructions(streamer, Instructions, nullptr);
   }
 
+  InitialCFAOffset = CFAOffset;
+
   // Padding
   streamer.EmitValueToAlignment(IsEH ? 4 : MAI->getPointerSize());
 
@@ -1348,10 +1381,12 @@ MCSymbol *FrameEmitterImpl::EmitFDE(MCObjectStreamer &streamer,
                                     const MCSymbol &cieStart,
                                     const MCDwarfFrameInfo &frame) {
   MCContext &context = streamer.getContext();
-  MCSymbol *fdeStart = context.CreateTempSymbol();
-  MCSymbol *fdeEnd = context.CreateTempSymbol();
+  MCSymbol *fdeStart = context.createTempSymbol();
+  MCSymbol *fdeEnd = context.createTempSymbol();
   const MCObjectFileInfo *MOFI = context.getObjectFileInfo();
 
+  CFAOffset = InitialCFAOffset;
+
   // Length
   const MCExpr *Length = MakeStartMinusEndExpr(streamer, *fdeStart, *fdeEnd, 0);
   emitAbsValue(streamer, Length, 4);
@@ -1485,12 +1520,12 @@ void MCDwarfFrameEmitter::Emit(MCObjectStreamer &Streamer, MCAsmBackend *MAB,
 
   if (!NeedsEHFrameSection) return;
 
-  const MCSection &Section =
-    IsEH ? *const_cast<MCObjectFileInfo*>(MOFI)->getEHFrameSection() :
-           *MOFI->getDwarfFrameSection();
+  MCSection &Section =
+      IsEH ? *const_cast<MCObjectFileInfo *>(MOFI)->getEHFrameSection()
+           : *MOFI->getDwarfFrameSection();
 
   Streamer.SwitchSection(&Section);
-  MCSymbol *SectionStart = Context.CreateTempSymbol();
+  MCSymbol *SectionStart = Context.createTempSymbol();
   Streamer.EmitLabel(SectionStart);
   Emitter.setSectionStart(SectionStart);