DwarfException::DwarfException(raw_ostream &OS, AsmPrinter *A,
const MCAsmInfo *T)
- : DwarfPrinter(OS, A, T, "eh"), shouldEmitTable(false),shouldEmitMoves(false),
+ : DwarfPrinter(OS, A, T), shouldEmitTable(false),shouldEmitMoves(false),
shouldEmitTableModule(false), shouldEmitMovesModule(false),
ExceptionTimer(0) {
if (TimePassesIsEnabled)
delete ExceptionTimer;
}
-/// SizeOfEncodedValue - Return the size of the encoding in bytes.
-unsigned DwarfException::SizeOfEncodedValue(unsigned Encoding) {
- if (Encoding == dwarf::DW_EH_PE_omit)
- return 0;
-
- switch (Encoding & 0x07) {
- case dwarf::DW_EH_PE_absptr:
- return TD->getPointerSize();
- case dwarf::DW_EH_PE_udata2:
- return 2;
- case dwarf::DW_EH_PE_udata4:
- return 4;
- case dwarf::DW_EH_PE_udata8:
- return 8;
- }
-
- assert(0 && "Invalid encoded value.");
- return 0;
-}
-
-/// CreateLabelDiff - Emit a label and subtract it from the expression we
-/// already have. This is equivalent to emitting "foo - .", but we have to emit
-/// the label for "." directly.
-const MCExpr *DwarfException::CreateLabelDiff(const MCExpr *ExprRef,
- const char *LabelName,
- unsigned Index) {
- SmallString<64> Name;
- raw_svector_ostream(Name) << MAI->getPrivateGlobalPrefix()
- << LabelName << Asm->getFunctionNumber()
- << "_" << Index;
- MCSymbol *DotSym = Asm->OutContext.GetOrCreateSymbol(Name.str());
- Asm->OutStreamer.EmitLabel(DotSym);
-
- return MCBinaryExpr::CreateSub(ExprRef,
- MCSymbolRefExpr::Create(DotSym,
- Asm->OutContext),
- Asm->OutContext);
-}
-
/// EmitCIE - Emit a Common Information Entry (CIE). This holds information that
/// is shared among many Frame Description Entries. There is at least one CIE
/// in every non-empty .debug_frame section.
TD->getPointerSize() : -TD->getPointerSize();
const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering();
-
+
// Begin eh frame section.
Asm->OutStreamer.SwitchSection(TLOF.getEHFrameSection());
- if (MAI->is_EHSymbolPrivate())
- O << MAI->getPrivateGlobalPrefix();
- O << "EH_frame" << Index << ":\n";
+ MCSymbol *EHFrameSym;
+ if (TLOF.isFunctionEHFrameSymbolPrivate())
+ EHFrameSym = getDWLabel("EH_frame", Index);
+ else
+ EHFrameSym = Asm->OutContext.GetOrCreateSymbol(Twine("EH_frame") +
+ Twine(Index));
+ Asm->OutStreamer.EmitLabel(EHFrameSym);
- EmitLabel("section_eh_frame", Index);
+ Asm->OutStreamer.EmitLabel(getDWLabel("section_eh_frame", Index));
// Define base labels.
- EmitLabel("eh_frame_common", Index);
+ Asm->OutStreamer.EmitLabel(getDWLabel("eh_frame_common", Index));
// Define the eh frame length.
- EmitDifference("eh_frame_common_end", Index,
- "eh_frame_common_begin", Index, true);
- EOL("Length of Common Information Entry");
+ Asm->OutStreamer.AddComment("Length of Common Information Entry");
+ EmitDifference(getDWLabel("eh_frame_common_end", Index),
+ getDWLabel("eh_frame_common_begin", Index), true);
// EH frame header.
- EmitLabel("eh_frame_common_begin", Index);
- if (Asm->VerboseAsm) Asm->OutStreamer.AddComment("CIE Identifier Tag");
+ Asm->OutStreamer.EmitLabel(getDWLabel("eh_frame_common_begin", Index));
+ Asm->OutStreamer.AddComment("CIE Identifier Tag");
Asm->OutStreamer.EmitIntValue(0, 4/*size*/, 0/*addrspace*/);
- if (Asm->VerboseAsm) Asm->OutStreamer.AddComment("DW_CIE_VERSION");
+ Asm->OutStreamer.AddComment("DW_CIE_VERSION");
Asm->OutStreamer.EmitIntValue(dwarf::DW_CIE_VERSION, 1/*size*/, 0/*addr*/);
// The personality presence indicates that language specific information will
// show up in the eh frame. Find out how we are supposed to lower the
// personality function reference:
- const MCExpr *PersonalityRef = 0;
- bool IsPersonalityIndirect = false, IsPersonalityPCRel = false;
- if (PersonalityFn) {
- // FIXME: HANDLE STATIC CODEGEN MODEL HERE.
-
- // In non-static mode, ask the object file how to represent this reference.
- PersonalityRef =
- TLOF.getSymbolForDwarfGlobalReference(PersonalityFn, Asm->Mang,
- Asm->MMI,
- IsPersonalityIndirect,
- IsPersonalityPCRel);
- }
-
- unsigned PerEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
- if (IsPersonalityIndirect)
- PerEncoding |= dwarf::DW_EH_PE_indirect;
- unsigned LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
- unsigned FDEEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
+
+ unsigned LSDAEncoding = TLOF.getLSDAEncoding();
+ unsigned FDEEncoding = TLOF.getFDEEncoding();
+ unsigned PerEncoding = TLOF.getPersonalityEncoding();
char Augmentation[6] = { 0 };
unsigned AugmentationSize = 0;
char *APtr = Augmentation + 1;
- if (PersonalityRef) {
+ if (PersonalityFn) {
// There is a personality function.
*APtr++ = 'P';
AugmentationSize += 1 + SizeOfEncodedValue(PerEncoding);
if (APtr != Augmentation + 1)
Augmentation[0] = 'z';
+ Asm->OutStreamer.AddComment("CIE Augmentation");
Asm->OutStreamer.EmitBytes(StringRef(Augmentation, strlen(Augmentation)+1),0);
- EOL("CIE Augmentation");
// Round out reader.
EmitULEB128(1, "CIE Code Alignment Factor");
EmitSLEB128(stackGrowth, "CIE Data Alignment Factor");
+ Asm->OutStreamer.AddComment("CIE Return Address Column");
Asm->EmitInt8(RI->getDwarfRegNum(RI->getRARegister(), true));
- EOL("CIE Return Address Column");
- EmitULEB128(AugmentationSize, "Augmentation Size");
- EmitEncodingByte(PerEncoding, "Personality");
+ if (Augmentation[0]) {
+ EmitULEB128(AugmentationSize, "Augmentation Size");
- // If there is a personality, we need to indicate the function's location.
- if (PersonalityRef) {
- if (!IsPersonalityPCRel)
- PersonalityRef = CreateLabelDiff(PersonalityRef, "personalityref_addr",
- Index);
-
- O << MAI->getData32bitsDirective() << *PersonalityRef;
- EOL("Personality");
-
- EmitEncodingByte(LSDAEncoding, "LSDA");
- EmitEncodingByte(FDEEncoding, "FDE");
+ // If there is a personality, we need to indicate the function's location.
+ if (PersonalityFn) {
+ EmitEncodingByte(PerEncoding, "Personality");
+ Asm->OutStreamer.AddComment("Personality");
+ EmitReference(PersonalityFn, PerEncoding);
+ }
+ if (UsesLSDA[Index])
+ EmitEncodingByte(LSDAEncoding, "LSDA");
+ if (FDEEncoding != dwarf::DW_EH_PE_absptr)
+ EmitEncodingByte(FDEEncoding, "FDE");
}
// Indicate locations of general callee saved registers in frame.
std::vector<MachineMove> Moves;
RI->getInitialFrameState(Moves);
- EmitFrameMoves(NULL, 0, Moves, true);
+ EmitFrameMoves(0, Moves, true);
// On Darwin the linker honors the alignment of eh_frame, which means it must
// be 8-byte on 64-bit targets to match what gcc does. Otherwise you get
// holes which confuse readers of eh_frame.
Asm->EmitAlignment(TD->getPointerSize() == 4 ? 2 : 3, 0, 0, false);
- EmitLabel("eh_frame_common_end", Index);
- Asm->O << '\n';
+ Asm->OutStreamer.EmitLabel(getDWLabel("eh_frame_common_end", Index));
}
/// EmitFDE - Emit the Frame Description Entry (FDE) for the function.
"Should not emit 'available externally' functions at all");
const Function *TheFunc = EHFrameInfo.function;
+ const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering();
- Asm->OutStreamer.SwitchSection(Asm->getObjFileLowering().getEHFrameSection());
+ unsigned LSDAEncoding = TLOF.getLSDAEncoding();
+ unsigned FDEEncoding = TLOF.getFDEEncoding();
+
+ Asm->OutStreamer.SwitchSection(TLOF.getEHFrameSection());
// Externally visible entry into the functions eh frame info. If the
// corresponding function is static, this should not be externally visible.
- if (!TheFunc->hasLocalLinkage())
- if (const char *GlobalEHDirective = MAI->getGlobalEHDirective())
- O << GlobalEHDirective << *EHFrameInfo.FunctionEHSym << '\n';
+ if (!TheFunc->hasLocalLinkage() && TLOF.isFunctionEHSymbolGlobal())
+ Asm->OutStreamer.EmitSymbolAttribute(EHFrameInfo.FunctionEHSym,MCSA_Global);
// If corresponding function is weak definition, this should be too.
if (TheFunc->isWeakForLinker() && MAI->getWeakDefDirective())
- O << MAI->getWeakDefDirective() << *EHFrameInfo.FunctionEHSym << '\n';
+ Asm->OutStreamer.EmitSymbolAttribute(EHFrameInfo.FunctionEHSym,
+ MCSA_WeakDefinition);
// If corresponding function is hidden, this should be too.
if (TheFunc->hasHiddenVisibility())
if (!EHFrameInfo.hasCalls && !UnwindTablesMandatory &&
(!TheFunc->isWeakForLinker() ||
!MAI->getWeakDefDirective() ||
- MAI->getSupportsWeakOmittedEHFrame())) {
- O << *EHFrameInfo.FunctionEHSym << " = 0\n";
+ TLOF.getSupportsWeakOmittedEHFrame())) {
+ Asm->OutStreamer.EmitAssignment(EHFrameInfo.FunctionEHSym,
+ MCConstantExpr::Create(0, Asm->OutContext));
// This name has no connection to the function, so it might get
// dead-stripped when the function is not, erroneously. Prohibit
// dead-stripping unconditionally.
Asm->OutStreamer.EmitSymbolAttribute(EHFrameInfo.FunctionEHSym,
MCSA_NoDeadStrip);
} else {
- O << *EHFrameInfo.FunctionEHSym << ":\n";
+ Asm->OutStreamer.EmitLabel(EHFrameInfo.FunctionEHSym);
// EH frame header.
- EmitDifference("eh_frame_end", EHFrameInfo.Number,
- "eh_frame_begin", EHFrameInfo.Number, true);
- EOL("Length of Frame Information Entry");
+ Asm->OutStreamer.AddComment("Length of Frame Information Entry");
+ EmitDifference(getDWLabel("eh_frame_end", EHFrameInfo.Number),
+ getDWLabel("eh_frame_begin", EHFrameInfo.Number),
+ true);
- EmitLabel("eh_frame_begin", EHFrameInfo.Number);
+ Asm->OutStreamer.EmitLabel(getDWLabel("eh_frame_begin",EHFrameInfo.Number));
- EmitSectionOffset("eh_frame_begin", "eh_frame_common",
- EHFrameInfo.Number, EHFrameInfo.PersonalityIndex,
- true, true, false);
+ Asm->OutStreamer.AddComment("FDE CIE offset");
+ EmitSectionOffset(getDWLabel("eh_frame_begin", EHFrameInfo.Number),
+ getDWLabel("eh_frame_common",
+ EHFrameInfo.PersonalityIndex),
+ true, true);
- EOL("FDE CIE offset");
+ MCSymbol *EHFuncBeginSym = getDWLabel("eh_func_begin", EHFrameInfo.Number);
- EmitReference("eh_func_begin", EHFrameInfo.Number, true, true);
- EOL("FDE initial location");
- EmitDifference("eh_func_end", EHFrameInfo.Number,
- "eh_func_begin", EHFrameInfo.Number, true);
- EOL("FDE address range");
+ Asm->OutStreamer.AddComment("FDE initial location");
+ EmitReference(EHFuncBeginSym, FDEEncoding);
+
+ Asm->OutStreamer.AddComment("FDE address range");
+ EmitDifference(getDWLabel("eh_func_end", EHFrameInfo.Number),EHFuncBeginSym,
+ SizeOfEncodedValue(FDEEncoding) == 4);
// If there is a personality and landing pads then point to the language
// specific data area in the exception table.
if (MMI->getPersonalities()[0] != NULL) {
+ unsigned Size = SizeOfEncodedValue(LSDAEncoding);
- if (Asm->TM.getLSDAEncoding() != DwarfLSDAEncoding::EightByte) {
- EmitULEB128(4, "Augmentation size");
-
- if (EHFrameInfo.hasLandingPads)
- EmitReference("exception", EHFrameInfo.Number, true, true);
- else
- Asm->OutStreamer.EmitIntValue(0, 4/*size*/, 0/*addrspace*/);
- } else {
- EmitULEB128(TD->getPointerSize(), "Augmentation size");
-
- if (EHFrameInfo.hasLandingPads) {
- EmitReference("exception", EHFrameInfo.Number, true, false);
- } else {
- Asm->OutStreamer.EmitIntValue(0, TD->getPointerSize(),
- 0/*addrspace*/);
- }
- }
+ EmitULEB128(Size, "Augmentation size");
+ Asm->OutStreamer.AddComment("Language Specific Data Area");
+ if (EHFrameInfo.hasLandingPads)
+ EmitReference(getDWLabel("exception", EHFrameInfo.Number),LSDAEncoding);
+ else
+ Asm->OutStreamer.EmitIntValue(0, Size/*size*/, 0/*addrspace*/);
- EOL("Language Specific Data Area");
} else {
EmitULEB128(0, "Augmentation size");
}
// Indicate locations of function specific callee saved registers in frame.
- EmitFrameMoves("eh_func_begin", EHFrameInfo.Number, EHFrameInfo.Moves,
- true);
+ EmitFrameMoves(EHFuncBeginSym, EHFrameInfo.Moves, true);
// On Darwin the linker honors the alignment of eh_frame, which means it
// must be 8-byte on 64-bit targets to match what gcc does. Otherwise you
// get holes which confuse readers of eh_frame.
Asm->EmitAlignment(TD->getPointerSize() == sizeof(int32_t) ? 2 : 3,
0, 0, false);
- EmitLabel("eh_frame_end", EHFrameInfo.Number);
+ Asm->OutStreamer.EmitLabel(getDWLabel("eh_frame_end", EHFrameInfo.Number));
// If the function is marked used, this table should be also. We cannot
// make the mark unconditional in this case, since retaining the table also
Asm->OutStreamer.EmitSymbolAttribute(EHFrameInfo.FunctionEHSym,
MCSA_NoDeadStrip);
}
- Asm->O << '\n';
+ Asm->OutStreamer.AddBlankLine();
}
/// SharedTypeIds - How many leading type ids two landing pads have in common.
if (NumShared < TypeIds.size()) {
unsigned SizeAction = 0;
- ActionEntry *PrevAction = 0;
+ unsigned PrevAction = (unsigned)-1;
if (NumShared) {
const unsigned SizePrevIds = PrevLPI->TypeIds.size();
assert(Actions.size());
- PrevAction = &Actions.back();
- SizeAction = MCAsmInfo::getSLEB128Size(PrevAction->NextAction) +
- MCAsmInfo::getSLEB128Size(PrevAction->ValueForTypeID);
+ PrevAction = Actions.size() - 1;
+ SizeAction =
+ MCAsmInfo::getSLEB128Size(Actions[PrevAction].NextAction) +
+ MCAsmInfo::getSLEB128Size(Actions[PrevAction].ValueForTypeID);
for (unsigned j = NumShared; j != SizePrevIds; ++j) {
+ assert(PrevAction != (unsigned)-1 && "PrevAction is invalid!");
SizeAction -=
- MCAsmInfo::getSLEB128Size(PrevAction->ValueForTypeID);
- SizeAction += -PrevAction->NextAction;
- PrevAction = PrevAction->Previous;
+ MCAsmInfo::getSLEB128Size(Actions[PrevAction].ValueForTypeID);
+ SizeAction += -Actions[PrevAction].NextAction;
+ PrevAction = Actions[PrevAction].Previous;
}
}
ActionEntry Action = { ValueForTypeID, NextAction, PrevAction };
Actions.push_back(Action);
- PrevAction = &Actions.back();
+ PrevAction = Actions.size() - 1;
}
// Record the first action of the landing pad site.
// Information used when created the call-site table. The action record
// field of the call site record is the offset of the first associated
// action record, relative to the start of the actions table. This value is
- // biased by 1 (1 in dicating the start of the actions table), and 0
+ // biased by 1 (1 indicating the start of the actions table), and 0
// indicates that there are no actions.
FirstActions.push_back(FirstAction);
const SmallVectorImpl<const LandingPadInfo *> &LandingPads,
const SmallVectorImpl<unsigned> &FirstActions) {
// The end label of the previous invoke or nounwind try-range.
- unsigned LastLabel = 0;
+ MCSymbol *LastLabel = 0;
// Whether there is a potentially throwing instruction (currently this means
// an ordinary call) between the end of the previous try-range and now.
continue;
}
- unsigned BeginLabel = MI->getOperand(0).getImm();
- assert(BeginLabel && "Invalid label!");
-
// End of the previous try-range?
+ MCSymbol *BeginLabel = MI->getOperand(0).getMCSymbol();
if (BeginLabel == LastLabel)
SawPotentiallyThrowing = false;
const std::vector<GlobalVariable *> &TypeInfos = MMI->getTypeInfos();
const std::vector<unsigned> &FilterIds = MMI->getFilterIds();
const std::vector<LandingPadInfo> &PadInfos = MMI->getLandingPads();
- if (PadInfos.empty()) return;
// Sort the landing pads in order of their type ids. This is used to fold
// duplicate actions.
// landing pad site.
SmallVector<ActionEntry, 32> Actions;
SmallVector<unsigned, 64> FirstActions;
- unsigned SizeActions = ComputeActionsTable(LandingPads, Actions,
- FirstActions);
+ unsigned SizeActions=ComputeActionsTable(LandingPads, Actions, FirstActions);
// Invokes and nounwind calls have entries in PadMap (due to being bracketed
// by try-range labels when lowered). Ordinary calls do not, so appropriate
for (unsigned i = 0, N = LandingPads.size(); i != N; ++i) {
const LandingPadInfo *LandingPad = LandingPads[i];
for (unsigned j = 0, E = LandingPad->BeginLabels.size(); j != E; ++j) {
- unsigned BeginLabel = LandingPad->BeginLabels[j];
+ MCSymbol *BeginLabel = LandingPad->BeginLabels[j];
assert(!PadMap.count(BeginLabel) && "Duplicate landing pad labels!");
PadRange P = { i, j };
PadMap[BeginLabel] = P;
const unsigned LandingPadSize = SizeOfEncodedValue(dwarf::DW_EH_PE_udata4);
bool IsSJLJ = MAI->getExceptionHandlingType() == ExceptionHandling::SjLj;
bool HaveTTData = IsSJLJ ? (!TypeInfos.empty() || !FilterIds.empty()) : true;
- unsigned SizeSites;
+ unsigned CallSiteTableLength;
if (IsSJLJ)
- SizeSites = 0;
+ CallSiteTableLength = 0;
else
- SizeSites = CallSites.size() *
+ CallSiteTableLength = CallSites.size() *
(SiteStartSize + SiteLengthSize + LandingPadSize);
for (unsigned i = 0, e = CallSites.size(); i < e; ++i) {
- SizeSites += MCAsmInfo::getULEB128Size(CallSites[i].Action);
+ CallSiteTableLength += MCAsmInfo::getULEB128Size(CallSites[i].Action);
if (IsSJLJ)
- SizeSites += MCAsmInfo::getULEB128Size(i);
+ CallSiteTableLength += MCAsmInfo::getULEB128Size(i);
}
// Type infos.
const MCSection *LSDASection = Asm->getObjFileLowering().getLSDASection();
- unsigned TTypeFormat;
+ unsigned TTypeEncoding;
unsigned TypeFormatSize;
if (!HaveTTData) {
// For SjLj exceptions, if there is no TypeInfo, then we just explicitly say
// that we're omitting that bit.
- TTypeFormat = dwarf::DW_EH_PE_omit;
+ TTypeEncoding = dwarf::DW_EH_PE_omit;
TypeFormatSize = SizeOfEncodedValue(dwarf::DW_EH_PE_absptr);
} else {
// Okay, we have actual filters or typeinfos to emit. As such, we need to
// somewhere. This predicate should be moved to a shared location that is
// in target-independent code.
//
- if (LSDASection->getKind().isWriteable() ||
- Asm->TM.getRelocationModel() == Reloc::Static)
- TTypeFormat = dwarf::DW_EH_PE_absptr;
- else
- TTypeFormat = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
- dwarf::DW_EH_PE_sdata4;
-
- TypeFormatSize = SizeOfEncodedValue(TTypeFormat);
+ TTypeEncoding = Asm->getObjFileLowering().getTTypeEncoding();
+ TypeFormatSize = SizeOfEncodedValue(TTypeEncoding);
}
// Begin the exception table.
Asm->OutStreamer.SwitchSection(LSDASection);
Asm->EmitAlignment(2, 0, 0, false);
- O << "GCC_except_table" << SubprogramCount << ":\n";
+ // Emit the LSDA.
+ MCSymbol *GCCETSym =
+ Asm->OutContext.GetOrCreateSymbol(Twine("GCC_except_table")+
+ Twine(SubprogramCount));
+ Asm->OutStreamer.EmitLabel(GCCETSym);
+ Asm->OutStreamer.EmitLabel(getDWLabel("exception", SubprogramCount));
+
+ if (IsSJLJ)
+ Asm->OutStreamer.EmitLabel(getDWLabel("_LSDA_", Asm->getFunctionNumber()));
+
+ // Emit the LSDA header.
+ EmitEncodingByte(dwarf::DW_EH_PE_omit, "@LPStart");
+ EmitEncodingByte(TTypeEncoding, "@TType");
// The type infos need to be aligned. GCC does this by inserting padding just
// before the type infos. However, this changes the size of the exception
// So by increasing the size by inserting padding, you may increase the number
// of bytes used for writing the size. If it increases, say by one byte, then
// you now need to output one less byte of padding to get the type infos
- // aligned. However this decreases the size of the exception table. This
+ // aligned. However this decreases the size of the exception table. This
// changes the value you have to output for the exception table size. Due to
// the variable length encoding, the number of bytes used for writing the
// length may decrease. If so, you then have to increase the amount of
// We chose another solution: don't output padding inside the table like GCC
// does, instead output it before the table.
unsigned SizeTypes = TypeInfos.size() * TypeFormatSize;
- unsigned TyOffset = sizeof(int8_t) + // Call site format
- MCAsmInfo::getULEB128Size(SizeSites) + // Call site table length
- SizeSites + SizeActions + SizeTypes;
- unsigned TotalSize = sizeof(int8_t) + // LPStart format
- sizeof(int8_t) + // TType format
- (HaveTTData ?
- MCAsmInfo::getULEB128Size(TyOffset) : 0) + // TType base offset
- TyOffset;
+ unsigned CallSiteTableLengthSize =
+ MCAsmInfo::getULEB128Size(CallSiteTableLength);
+ unsigned TTypeBaseOffset =
+ sizeof(int8_t) + // Call site format
+ CallSiteTableLengthSize + // Call site table length size
+ CallSiteTableLength + // Call site table length
+ SizeActions + // Actions size
+ SizeTypes;
+ unsigned TTypeBaseOffsetSize = MCAsmInfo::getULEB128Size(TTypeBaseOffset);
+ unsigned TotalSize =
+ sizeof(int8_t) + // LPStart format
+ sizeof(int8_t) + // TType format
+ (HaveTTData ? TTypeBaseOffsetSize : 0) + // TType base offset size
+ TTypeBaseOffset; // TType base offset
unsigned SizeAlign = (4 - TotalSize) & 3;
- for (unsigned i = 0; i != SizeAlign; ++i) {
- Asm->EmitInt8(0);
- EOL("Padding");
+ if (HaveTTData) {
+ // Account for any extra padding that will be added to the call site table
+ // length.
+ EmitULEB128(TTypeBaseOffset, "@TType base offset", SizeAlign);
+ SizeAlign = 0;
}
- EmitLabel("exception", SubprogramCount);
-
- if (IsSJLJ) {
- SmallString<16> LSDAName;
- raw_svector_ostream(LSDAName) << MAI->getPrivateGlobalPrefix() <<
- "_LSDA_" << Asm->getFunctionNumber();
- O << LSDAName.str() << ":\n";
- }
-
- // Emit the header.
- EmitEncodingByte(dwarf::DW_EH_PE_omit, "@LPStart");
- EmitEncodingByte(TTypeFormat, "@TType");
-
- if (HaveTTData)
- EmitULEB128(TyOffset, "@TType base offset");
-
// SjLj Exception handling
if (IsSJLJ) {
EmitEncodingByte(dwarf::DW_EH_PE_udata4, "Call site");
- EmitULEB128(SizeSites, "Call site table length");
+
+ // Add extra padding if it wasn't added to the TType base offset.
+ EmitULEB128(CallSiteTableLength, "Call site table length", SizeAlign);
// Emit the landing pad site information.
unsigned idx = 0;
// Emit the landing pad call site table.
EmitEncodingByte(dwarf::DW_EH_PE_udata4, "Call site");
- EmitULEB128(SizeSites, "Call site table length");
+
+ // Add extra padding if it wasn't added to the TType base offset.
+ EmitULEB128(CallSiteTableLength, "Call site table length", SizeAlign);
for (SmallVectorImpl<CallSiteEntry>::const_iterator
I = CallSites.begin(), E = CallSites.end(); I != E; ++I) {
const CallSiteEntry &S = *I;
- const char *BeginTag;
- unsigned BeginNumber;
-
- if (!S.BeginLabel) {
- BeginTag = "eh_func_begin";
- BeginNumber = SubprogramCount;
- } else {
- BeginTag = "label";
- BeginNumber = S.BeginLabel;
- }
-
+
+ MCSymbol *EHFuncBeginSym = getDWLabel("eh_func_begin", SubprogramCount);
+
+ MCSymbol *BeginLabel = S.BeginLabel;
+ if (BeginLabel == 0)
+ BeginLabel = EHFuncBeginSym;
+ MCSymbol *EndLabel = S.EndLabel;
+ if (EndLabel == 0)
+ EndLabel = getDWLabel("eh_func_end", SubprogramCount);
+
// Offset of the call site relative to the previous call site, counted in
// number of 16-byte bundles. The first call site is counted relative to
// the start of the procedure fragment.
- EmitSectionOffset(BeginTag, "eh_func_begin", BeginNumber, SubprogramCount,
- true, true);
- EOL("Region start");
-
- if (!S.EndLabel)
- EmitDifference("eh_func_end", SubprogramCount, BeginTag, BeginNumber,
- true);
- else
- EmitDifference("label", S.EndLabel, BeginTag, BeginNumber, true);
+ Asm->OutStreamer.AddComment("Region start");
+ EmitSectionOffset(BeginLabel, EHFuncBeginSym, true, true);
+
+ Asm->OutStreamer.AddComment("Region length");
+ EmitDifference(EndLabel, BeginLabel, true);
- EOL("Region length");
// Offset of the landing pad, counted in 16-byte bundles relative to the
// @LPStart address.
- if (!S.PadLabel) {
- Asm->OutStreamer.AddComment("Landing pad");
+ Asm->OutStreamer.AddComment("Landing pad");
+ if (!S.PadLabel)
Asm->OutStreamer.EmitIntValue(0, 4/*size*/, 0/*addrspace*/);
- } else {
- EmitSectionOffset("label", "eh_func_begin", S.PadLabel, SubprogramCount,
- true, true);
- EOL("Landing pad");
- }
+ else
+ EmitSectionOffset(S.PadLabel, EHFuncBeginSym, true, true);
// Offset of the first associated action record, relative to the start of
// the action table. This value is biased by 1 (1 indicates the start of
}
// Emit the Action Table.
- if (Actions.size() != 0) EOL("-- Action Record Table --");
+ if (Actions.size() != 0) {
+ Asm->OutStreamer.AddComment("-- Action Record Table --");
+ Asm->OutStreamer.AddBlankLine();
+ }
+
for (SmallVectorImpl<ActionEntry>::const_iterator
I = Actions.begin(), E = Actions.end(); I != E; ++I) {
const ActionEntry &Action = *I;
- EOL("Action Record:");
+ Asm->OutStreamer.AddComment("Action Record");
+ Asm->OutStreamer.AddBlankLine();
// Type Filter
//
}
// Emit the Catch TypeInfos.
- if (TypeInfos.size() != 0) EOL("-- Catch TypeInfos --");
+ if (!TypeInfos.empty()) {
+ Asm->OutStreamer.AddComment("-- Catch TypeInfos --");
+ Asm->OutStreamer.AddBlankLine();
+ }
for (std::vector<GlobalVariable *>::const_reverse_iterator
I = TypeInfos.rbegin(), E = TypeInfos.rend(); I != E; ++I) {
const GlobalVariable *GV = *I;
- PrintRelDirective();
- if (GV) {
- O << *Asm->GetGlobalValueSymbol(GV);
- EOL("TypeInfo");
- } else {
- O << "0x0";
- EOL("");
- }
+ Asm->OutStreamer.AddComment("TypeInfo");
+ if (GV)
+ EmitReference(GV, TTypeEncoding);
+ else
+ Asm->OutStreamer.EmitIntValue(0, SizeOfEncodedValue(TTypeEncoding), 0);
}
// Emit the Exception Specifications.
- if (FilterIds.size() != 0) EOL("-- Filter IDs --");
+ if (!FilterIds.empty()) {
+ Asm->OutStreamer.AddComment("-- Filter IDs --");
+ Asm->OutStreamer.AddBlankLine();
+ }
for (std::vector<unsigned>::const_iterator
I = FilterIds.begin(), E = FilterIds.end(); I < E; ++I) {
unsigned TypeID = *I;
this->MF = MF;
shouldEmitTable = shouldEmitMoves = false;
- // Map all labels and get rid of any dead landing pads.
- MMI->TidyLandingPads();
-
// If any landing pads survive, we need an EH table.
- if (!MMI->getLandingPads().empty())
- shouldEmitTable = true;
+ shouldEmitTable = !MMI->getLandingPads().empty();
// See if we need frame move info.
- if (!MF->getFunction()->doesNotThrow() || UnwindTablesMandatory)
- shouldEmitMoves = true;
+ shouldEmitMoves = !MF->getFunction()->doesNotThrow() || UnwindTablesMandatory;
if (shouldEmitMoves || shouldEmitTable)
// Assumes in correct section after the entry point.
- EmitLabel("eh_func_begin", ++SubprogramCount);
+ Asm->OutStreamer.EmitLabel(getDWLabel("eh_func_begin", ++SubprogramCount));
shouldEmitTableModule |= shouldEmitTable;
shouldEmitMovesModule |= shouldEmitMoves;
if (TimePassesIsEnabled)
ExceptionTimer->startTimer();
- EmitLabel("eh_func_end", SubprogramCount);
- EmitExceptionTable();
+ Asm->OutStreamer.EmitLabel(getDWLabel("eh_func_end", SubprogramCount));
+ // Record if this personality index uses a landing pad.
+ bool HasLandingPad = !MMI->getLandingPads().empty();
+ UsesLSDA[MMI->getPersonalityIndex()] |= HasLandingPad;
+
+ // Map all labels and get rid of any dead landing pads.
+ MMI->TidyLandingPads();
+
+ if (HasLandingPad)
+ EmitExceptionTable();
+
+ const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering();
MCSymbol *FunctionEHSym =
Asm->GetSymbolWithGlobalValueBase(MF->getFunction(), ".eh",
- Asm->MAI->is_EHSymbolPrivate());
+ TLOF.isFunctionEHFrameSymbolPrivate());
// Save EH frame information
EHFrames.push_back(FunctionEHFrameInfo(FunctionEHSym, SubprogramCount,
MMI->getFrameMoves(),
MF->getFunction()));
- // Record if this personality index uses a landing pad.
- UsesLSDA[MMI->getPersonalityIndex()] |= !MMI->getLandingPads().empty();
-
if (TimePassesIsEnabled)
ExceptionTimer->stopTimer();
}