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-rw-r--r--llvm/lib/MC/MCDwarf.cpp142
1 files changed, 66 insertions, 76 deletions
diff --git a/llvm/lib/MC/MCDwarf.cpp b/llvm/lib/MC/MCDwarf.cpp
index b587680d682..e2fcbedbc96 100644
--- a/llvm/lib/MC/MCDwarf.cpp
+++ b/llvm/lib/MC/MCDwarf.cpp
@@ -1000,28 +1000,25 @@ class FrameEmitterImpl {
int InitialCFAOffset = 0;
bool IsEH;
const MCSymbol *SectionStart = nullptr;
+ MCObjectStreamer &Streamer;
public:
- FrameEmitterImpl(bool IsEH) : IsEH(IsEH) {}
+ FrameEmitterImpl(bool IsEH, MCObjectStreamer &Streamer)
+ : IsEH(IsEH), Streamer(Streamer) {}
void setSectionStart(const MCSymbol *Label) { SectionStart = Label; }
/// Emit the unwind information in a compact way.
- void EmitCompactUnwind(MCObjectStreamer &streamer,
- const MCDwarfFrameInfo &frame);
+ void EmitCompactUnwind(const MCDwarfFrameInfo &frame);
- const MCSymbol &EmitCIE(MCObjectStreamer &streamer,
- const MCSymbol *personality,
+ const MCSymbol &EmitCIE(const MCSymbol *personality,
unsigned personalityEncoding, const MCSymbol *lsda,
bool IsSignalFrame, unsigned lsdaEncoding,
bool IsSimple);
- MCSymbol *EmitFDE(MCObjectStreamer &streamer, const MCSymbol &cieStart,
- const MCDwarfFrameInfo &frame);
- void EmitCFIInstructions(MCObjectStreamer &streamer,
- ArrayRef<MCCFIInstruction> Instrs,
+ MCSymbol *EmitFDE(const MCSymbol &cieStart, const MCDwarfFrameInfo &frame);
+ void EmitCFIInstructions(ArrayRef<MCCFIInstruction> Instrs,
MCSymbol *BaseLabel);
- void EmitCFIInstruction(MCObjectStreamer &Streamer,
- const MCCFIInstruction &Instr);
+ void EmitCFIInstruction(const MCCFIInstruction &Instr);
};
} // end anonymous namespace
@@ -1030,8 +1027,7 @@ static void emitEncodingByte(MCObjectStreamer &Streamer, unsigned Encoding) {
Streamer.EmitIntValue(Encoding, 1);
}
-void FrameEmitterImpl::EmitCFIInstruction(MCObjectStreamer &Streamer,
- const MCCFIInstruction &Instr) {
+void FrameEmitterImpl::EmitCFIInstruction(const MCCFIInstruction &Instr) {
int dataAlignmentFactor = getDataAlignmentFactor(Streamer);
auto *MRI = Streamer.getContext().getRegisterInfo();
@@ -1156,8 +1152,7 @@ void FrameEmitterImpl::EmitCFIInstruction(MCObjectStreamer &Streamer,
}
/// Emit frame instructions to describe the layout of the frame.
-void FrameEmitterImpl::EmitCFIInstructions(MCObjectStreamer &streamer,
- ArrayRef<MCCFIInstruction> Instrs,
+void FrameEmitterImpl::EmitCFIInstructions(ArrayRef<MCCFIInstruction> Instrs,
MCSymbol *BaseLabel) {
for (unsigned i = 0, N = Instrs.size(); i < N; ++i) {
const MCCFIInstruction &Instr = Instrs[i];
@@ -1169,18 +1164,17 @@ void FrameEmitterImpl::EmitCFIInstructions(MCObjectStreamer &streamer,
if (BaseLabel && Label) {
MCSymbol *ThisSym = Label;
if (ThisSym != BaseLabel) {
- streamer.EmitDwarfAdvanceFrameAddr(BaseLabel, ThisSym);
+ Streamer.EmitDwarfAdvanceFrameAddr(BaseLabel, ThisSym);
BaseLabel = ThisSym;
}
}
- EmitCFIInstruction(streamer, Instr);
+ EmitCFIInstruction(Instr);
}
}
/// Emit the unwind information in a compact way.
-void FrameEmitterImpl::EmitCompactUnwind(MCObjectStreamer &Streamer,
- const MCDwarfFrameInfo &Frame) {
+void FrameEmitterImpl::EmitCompactUnwind(const MCDwarfFrameInfo &Frame) {
MCContext &Context = Streamer.getContext();
const MCObjectFileInfo *MOFI = Context.getObjectFileInfo();
@@ -1257,34 +1251,33 @@ static unsigned getCIEVersion(bool IsEH, unsigned DwarfVersion) {
llvm_unreachable("Unknown version");
}
-const MCSymbol &FrameEmitterImpl::EmitCIE(MCObjectStreamer &streamer,
- const MCSymbol *personality,
+const MCSymbol &FrameEmitterImpl::EmitCIE(const MCSymbol *personality,
unsigned personalityEncoding,
const MCSymbol *lsda,
bool IsSignalFrame,
unsigned lsdaEncoding,
bool IsSimple) {
- MCContext &context = streamer.getContext();
+ MCContext &context = Streamer.getContext();
const MCRegisterInfo *MRI = context.getRegisterInfo();
const MCObjectFileInfo *MOFI = context.getObjectFileInfo();
MCSymbol *sectionStart = context.createTempSymbol();
- streamer.EmitLabel(sectionStart);
+ Streamer.EmitLabel(sectionStart);
MCSymbol *sectionEnd = context.createTempSymbol();
// Length
- const MCExpr *Length = MakeStartMinusEndExpr(streamer, *sectionStart,
- *sectionEnd, 4);
- emitAbsValue(streamer, Length, 4);
+ const MCExpr *Length =
+ MakeStartMinusEndExpr(Streamer, *sectionStart, *sectionEnd, 4);
+ emitAbsValue(Streamer, Length, 4);
// CIE ID
unsigned CIE_ID = IsEH ? 0 : -1;
- streamer.EmitIntValue(CIE_ID, 4);
+ Streamer.EmitIntValue(CIE_ID, 4);
// Version
uint8_t CIEVersion = getCIEVersion(IsEH, context.getDwarfVersion());
- streamer.EmitIntValue(CIEVersion, 1);
+ Streamer.EmitIntValue(CIEVersion, 1);
// Augmentation String
SmallString<8> Augmentation;
@@ -1297,31 +1290,31 @@ const MCSymbol &FrameEmitterImpl::EmitCIE(MCObjectStreamer &streamer,
Augmentation += "R";
if (IsSignalFrame)
Augmentation += "S";
- streamer.EmitBytes(Augmentation);
+ Streamer.EmitBytes(Augmentation);
}
- streamer.EmitIntValue(0, 1);
+ Streamer.EmitIntValue(0, 1);
if (CIEVersion >= 4) {
// Address Size
- streamer.EmitIntValue(context.getAsmInfo()->getPointerSize(), 1);
+ Streamer.EmitIntValue(context.getAsmInfo()->getPointerSize(), 1);
// Segment Descriptor Size
- streamer.EmitIntValue(0, 1);
+ Streamer.EmitIntValue(0, 1);
}
// Code Alignment Factor
- streamer.EmitULEB128IntValue(context.getAsmInfo()->getMinInstAlignment());
+ Streamer.EmitULEB128IntValue(context.getAsmInfo()->getMinInstAlignment());
// Data Alignment Factor
- streamer.EmitSLEB128IntValue(getDataAlignmentFactor(streamer));
+ Streamer.EmitSLEB128IntValue(getDataAlignmentFactor(Streamer));
// Return Address Register
if (CIEVersion == 1) {
assert(MRI->getRARegister() <= 255 &&
"DWARF 2 encodes return_address_register in one byte");
- streamer.EmitIntValue(MRI->getDwarfRegNum(MRI->getRARegister(), IsEH), 1);
+ Streamer.EmitIntValue(MRI->getDwarfRegNum(MRI->getRARegister(), IsEH), 1);
} else {
- streamer.EmitULEB128IntValue(
+ Streamer.EmitULEB128IntValue(
MRI->getDwarfRegNum(MRI->getRARegister(), IsEH));
}
@@ -1333,28 +1326,28 @@ const MCSymbol &FrameEmitterImpl::EmitCIE(MCObjectStreamer &streamer,
// Personality Encoding
augmentationLength += 1;
// Personality
- augmentationLength += getSizeForEncoding(streamer, personalityEncoding);
+ augmentationLength += getSizeForEncoding(Streamer, personalityEncoding);
}
if (lsda)
augmentationLength += 1;
// Encoding of the FDE pointers
augmentationLength += 1;
- streamer.EmitULEB128IntValue(augmentationLength);
+ Streamer.EmitULEB128IntValue(augmentationLength);
// Augmentation Data (optional)
if (personality) {
// Personality Encoding
- emitEncodingByte(streamer, personalityEncoding);
+ emitEncodingByte(Streamer, personalityEncoding);
// Personality
- EmitPersonality(streamer, *personality, personalityEncoding);
+ EmitPersonality(Streamer, *personality, personalityEncoding);
}
if (lsda)
- emitEncodingByte(streamer, lsdaEncoding);
+ emitEncodingByte(Streamer, lsdaEncoding);
// Encoding of the FDE pointers
- emitEncodingByte(streamer, MOFI->getFDEEncoding());
+ emitEncodingByte(Streamer, MOFI->getFDEEncoding());
}
// Initial Instructions
@@ -1363,22 +1356,21 @@ const MCSymbol &FrameEmitterImpl::EmitCIE(MCObjectStreamer &streamer,
if (!IsSimple) {
const std::vector<MCCFIInstruction> &Instructions =
MAI->getInitialFrameState();
- EmitCFIInstructions(streamer, Instructions, nullptr);
+ EmitCFIInstructions(Instructions, nullptr);
}
InitialCFAOffset = CFAOffset;
// Padding
- streamer.EmitValueToAlignment(IsEH ? 4 : MAI->getPointerSize());
+ Streamer.EmitValueToAlignment(IsEH ? 4 : MAI->getPointerSize());
- streamer.EmitLabel(sectionEnd);
+ Streamer.EmitLabel(sectionEnd);
return *sectionStart;
}
-MCSymbol *FrameEmitterImpl::EmitFDE(MCObjectStreamer &streamer,
- const MCSymbol &cieStart,
+MCSymbol *FrameEmitterImpl::EmitFDE(const MCSymbol &cieStart,
const MCDwarfFrameInfo &frame) {
- MCContext &context = streamer.getContext();
+ MCContext &context = Streamer.getContext();
MCSymbol *fdeStart = context.createTempSymbol();
MCSymbol *fdeEnd = context.createTempSymbol();
const MCObjectFileInfo *MOFI = context.getObjectFileInfo();
@@ -1386,55 +1378,55 @@ MCSymbol *FrameEmitterImpl::EmitFDE(MCObjectStreamer &streamer,
CFAOffset = InitialCFAOffset;
// Length
- const MCExpr *Length = MakeStartMinusEndExpr(streamer, *fdeStart, *fdeEnd, 0);
- emitAbsValue(streamer, Length, 4);
+ const MCExpr *Length = MakeStartMinusEndExpr(Streamer, *fdeStart, *fdeEnd, 0);
+ emitAbsValue(Streamer, Length, 4);
- streamer.EmitLabel(fdeStart);
+ Streamer.EmitLabel(fdeStart);
// CIE Pointer
const MCAsmInfo *asmInfo = context.getAsmInfo();
if (IsEH) {
- const MCExpr *offset = MakeStartMinusEndExpr(streamer, cieStart, *fdeStart,
- 0);
- emitAbsValue(streamer, offset, 4);
+ const MCExpr *offset =
+ MakeStartMinusEndExpr(Streamer, cieStart, *fdeStart, 0);
+ emitAbsValue(Streamer, offset, 4);
} else if (!asmInfo->doesDwarfUseRelocationsAcrossSections()) {
- const MCExpr *offset = MakeStartMinusEndExpr(streamer, *SectionStart,
- cieStart, 0);
- emitAbsValue(streamer, offset, 4);
+ const MCExpr *offset =
+ MakeStartMinusEndExpr(Streamer, *SectionStart, cieStart, 0);
+ emitAbsValue(Streamer, offset, 4);
} else {
- streamer.EmitSymbolValue(&cieStart, 4);
+ Streamer.EmitSymbolValue(&cieStart, 4);
}
// PC Begin
unsigned PCEncoding =
IsEH ? MOFI->getFDEEncoding() : (unsigned)dwarf::DW_EH_PE_absptr;
- unsigned PCSize = getSizeForEncoding(streamer, PCEncoding);
- emitFDESymbol(streamer, *frame.Begin, PCEncoding, IsEH);
+ unsigned PCSize = getSizeForEncoding(Streamer, PCEncoding);
+ emitFDESymbol(Streamer, *frame.Begin, PCEncoding, IsEH);
// PC Range
- const MCExpr *Range = MakeStartMinusEndExpr(streamer, *frame.Begin,
- *frame.End, 0);
- emitAbsValue(streamer, Range, PCSize);
+ const MCExpr *Range =
+ MakeStartMinusEndExpr(Streamer, *frame.Begin, *frame.End, 0);
+ emitAbsValue(Streamer, Range, PCSize);
if (IsEH) {
// Augmentation Data Length
unsigned augmentationLength = 0;
if (frame.Lsda)
- augmentationLength += getSizeForEncoding(streamer, frame.LsdaEncoding);
+ augmentationLength += getSizeForEncoding(Streamer, frame.LsdaEncoding);
- streamer.EmitULEB128IntValue(augmentationLength);
+ Streamer.EmitULEB128IntValue(augmentationLength);
// Augmentation Data
if (frame.Lsda)
- emitFDESymbol(streamer, *frame.Lsda, frame.LsdaEncoding, true);
+ emitFDESymbol(Streamer, *frame.Lsda, frame.LsdaEncoding, true);
}
// Call Frame Instructions
- EmitCFIInstructions(streamer, frame.Instructions, frame.Begin);
+ EmitCFIInstructions(frame.Instructions, frame.Begin);
// Padding
- streamer.EmitValueToAlignment(PCSize);
+ Streamer.EmitValueToAlignment(PCSize);
return fdeEnd;
}
@@ -1494,7 +1486,7 @@ void MCDwarfFrameEmitter::Emit(MCObjectStreamer &Streamer, MCAsmBackend *MAB,
MCContext &Context = Streamer.getContext();
const MCObjectFileInfo *MOFI = Context.getObjectFileInfo();
- FrameEmitterImpl Emitter(IsEH);
+ FrameEmitterImpl Emitter(IsEH, Streamer);
ArrayRef<MCDwarfFrameInfo> FrameArray = Streamer.getDwarfFrameInfos();
// Emit the compact unwind info if available.
@@ -1512,7 +1504,7 @@ void MCDwarfFrameEmitter::Emit(MCObjectStreamer &Streamer, MCAsmBackend *MAB,
NeedsEHFrameSection |=
Frame.CompactUnwindEncoding ==
MOFI->getCompactUnwindDwarfEHFrameOnly();
- Emitter.EmitCompactUnwind(Streamer, Frame);
+ Emitter.EmitCompactUnwind(Frame);
}
}
@@ -1550,13 +1542,11 @@ void MCDwarfFrameEmitter::Emit(MCObjectStreamer &Streamer, MCAsmBackend *MAB,
Frame.LsdaEncoding, Frame.IsSignalFrame, Frame.IsSimple);
const MCSymbol *&CIEStart = IsEH ? CIEStarts[Key] : DummyDebugKey;
if (!CIEStart)
- CIEStart = &Emitter.EmitCIE(Streamer, Frame.Personality,
- Frame.PersonalityEncoding, Frame.Lsda,
- Frame.IsSignalFrame,
- Frame.LsdaEncoding,
- Frame.IsSimple);
+ CIEStart = &Emitter.EmitCIE(Frame.Personality, Frame.PersonalityEncoding,
+ Frame.Lsda, Frame.IsSignalFrame,
+ Frame.LsdaEncoding, Frame.IsSimple);
- FDEEnd = Emitter.EmitFDE(Streamer, *CIEStart, Frame);
+ FDEEnd = Emitter.EmitFDE(*CIEStart, Frame);
}
Streamer.EmitValueToAlignment(Context.getAsmInfo()->getPointerSize());
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