#include "DwarfException.h"
#include "llvm/Module.h"
+#include "llvm/CodeGen/AsmPrinter.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/Target/TargetData.h"
#include "llvm/Target/TargetFrameInfo.h"
#include "llvm/Target/TargetLoweringObjectFile.h"
+#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/Target/TargetRegisterInfo.h"
#include "llvm/Support/Dwarf.h"
#include "llvm/ADT/Twine.h"
using namespace llvm;
-DwarfException::DwarfException(raw_ostream &OS, AsmPrinter *A,
- const MCAsmInfo *T)
- : DwarfPrinter(OS, A, T), shouldEmitTable(false),shouldEmitMoves(false),
- shouldEmitTableModule(false), shouldEmitMovesModule(false),
- ExceptionTimer(0) {
- if (TimePassesIsEnabled)
- ExceptionTimer = new Timer("DWARF Exception Writer");
-}
+namespace {
+ const char *DWARFGroupName = "DWARF Emission";
+ const char *EHTimerName = "DWARF Exception Writer";
+} // end anonymous namespace
-DwarfException::~DwarfException() {
- delete ExceptionTimer;
-}
+DwarfException::DwarfException(AsmPrinter *A)
+ : Asm(A), MMI(Asm->MMI), shouldEmitTable(false), shouldEmitMoves(false),
+ shouldEmitTableModule(false), shouldEmitMovesModule(false) {}
-/// 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.GetOrCreateTemporarySymbol(Name.str());
- Asm->OutStreamer.EmitLabel(DotSym);
-
- return MCBinaryExpr::CreateSub(ExprRef,
- MCSymbolRefExpr::Create(DotSym,
- Asm->OutContext),
- Asm->OutContext);
-}
+DwarfException::~DwarfException() {}
/// 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.
void DwarfException::EmitCIE(const Function *PersonalityFn, unsigned Index) {
// Size and sign of stack growth.
- int stackGrowth =
- Asm->TM.getFrameInfo()->getStackGrowthDirection() ==
- TargetFrameInfo::StackGrowsUp ?
- TD->getPointerSize() : -TD->getPointerSize();
+ int stackGrowth = Asm->getTargetData().getPointerSize();
+ if (Asm->TM.getFrameInfo()->getStackGrowthDirection() ==
+ TargetFrameInfo::StackGrowsDown)
+ stackGrowth *= -1;
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 = Asm->GetTempSymbol("EH_frame", Index);
+ else
+ EHFrameSym = Asm->OutContext.GetOrCreateSymbol(Twine("EH_frame") +
+ Twine(Index));
+ Asm->OutStreamer.EmitLabel(EHFrameSym);
- Asm->OutStreamer.EmitLabel(getDWLabel("section_eh_frame", Index));
+ Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("section_eh_frame", Index));
// Define base labels.
- Asm->OutStreamer.EmitLabel(getDWLabel("eh_frame_common", Index));
+ Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("eh_frame_common", Index));
// Define the eh frame length.
Asm->OutStreamer.AddComment("Length of Common Information Entry");
- EmitDifference(getDWLabel("eh_frame_common_end", Index),
- getDWLabel("eh_frame_common_begin", Index), true);
+ Asm->EmitLabelDifference(Asm->GetTempSymbol("eh_frame_common_end", Index),
+ Asm->GetTempSymbol("eh_frame_common_begin", Index),
+ 4);
// EH frame header.
- Asm->OutStreamer.EmitLabel(getDWLabel("eh_frame_common_begin", Index));
+ Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("eh_frame_common_begin",Index));
Asm->OutStreamer.AddComment("CIE Identifier Tag");
Asm->OutStreamer.EmitIntValue(0, 4/*size*/, 0/*addrspace*/);
Asm->OutStreamer.AddComment("DW_CIE_VERSION");
if (PersonalityFn) {
// There is a personality function.
*APtr++ = 'P';
- AugmentationSize += 1 + SizeOfEncodedValue(PerEncoding);
+ AugmentationSize += 1 + Asm->GetSizeOfEncodedValue(PerEncoding);
}
if (UsesLSDA[Index]) {
Asm->OutStreamer.EmitBytes(StringRef(Augmentation, strlen(Augmentation)+1),0);
// Round out reader.
- EmitULEB128(1, "CIE Code Alignment Factor");
- EmitSLEB128(stackGrowth, "CIE Data Alignment Factor");
+ Asm->EmitULEB128(1, "CIE Code Alignment Factor");
+ Asm->EmitSLEB128(stackGrowth, "CIE Data Alignment Factor");
Asm->OutStreamer.AddComment("CIE Return Address Column");
+
+ const TargetRegisterInfo *RI = Asm->TM.getRegisterInfo();
Asm->EmitInt8(RI->getDwarfRegNum(RI->getRARegister(), true));
if (Augmentation[0]) {
- EmitULEB128(AugmentationSize, "Augmentation Size");
+ Asm->EmitULEB128(AugmentationSize, "Augmentation Size");
// If there is a personality, we need to indicate the function's location.
if (PersonalityFn) {
- EmitEncodingByte(PerEncoding, "Personality");
+ Asm->EmitEncodingByte(PerEncoding, "Personality");
Asm->OutStreamer.AddComment("Personality");
- EmitReference(PersonalityFn, PerEncoding);
+ Asm->EmitReference(PersonalityFn, PerEncoding);
}
if (UsesLSDA[Index])
- EmitEncodingByte(LSDAEncoding, "LSDA");
+ Asm->EmitEncodingByte(LSDAEncoding, "LSDA");
if (FDEEncoding != dwarf::DW_EH_PE_absptr)
- EmitEncodingByte(FDEEncoding, "FDE");
+ Asm->EmitEncodingByte(FDEEncoding, "FDE");
}
// Indicate locations of general callee saved registers in frame.
std::vector<MachineMove> Moves;
RI->getInitialFrameState(Moves);
- EmitFrameMoves(NULL, 0, Moves, true);
+ Asm->EmitFrameMoves(Moves, 0, 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);
- Asm->OutStreamer.EmitLabel(getDWLabel("eh_frame_common_end", Index));
+ Asm->EmitAlignment(Asm->getTargetData().getPointerSize() == 4 ? 2 : 3,
+ 0, 0, false);
+ Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("eh_frame_common_end", Index));
}
/// EmitFDE - Emit the Frame Description Entry (FDE) for the function.
// 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';
+ if (TheFunc->isWeakForLinker() && Asm->MAI->getWeakDefDirective())
+ Asm->OutStreamer.EmitSymbolAttribute(EHFrameInfo.FunctionEHSym,
+ MCSA_WeakDefinition);
// If corresponding function is hidden, this should be too.
if (TheFunc->hasHiddenVisibility())
- if (MCSymbolAttr HiddenAttr = MAI->getHiddenVisibilityAttr())
+ if (MCSymbolAttr HiddenAttr = Asm->MAI->getHiddenVisibilityAttr())
Asm->OutStreamer.EmitSymbolAttribute(EHFrameInfo.FunctionEHSym,
HiddenAttr);
// info is to be available for non-EH uses.
if (!EHFrameInfo.hasCalls && !UnwindTablesMandatory &&
(!TheFunc->isWeakForLinker() ||
- !MAI->getWeakDefDirective() ||
- MAI->getSupportsWeakOmittedEHFrame())) {
- O << *EHFrameInfo.FunctionEHSym << " = 0\n";
+ !Asm->MAI->getWeakDefDirective() ||
+ 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.
- if (MAI->hasNoDeadStrip())
+ if (Asm->MAI->hasNoDeadStrip())
Asm->OutStreamer.EmitSymbolAttribute(EHFrameInfo.FunctionEHSym,
MCSA_NoDeadStrip);
} else {
- O << *EHFrameInfo.FunctionEHSym << ":\n";
+ Asm->OutStreamer.EmitLabel(EHFrameInfo.FunctionEHSym);
// EH frame header.
Asm->OutStreamer.AddComment("Length of Frame Information Entry");
- EmitDifference(getDWLabel("eh_frame_end", EHFrameInfo.Number),
- getDWLabel("eh_frame_begin", EHFrameInfo.Number),
- true);
+ Asm->EmitLabelDifference(
+ Asm->GetTempSymbol("eh_frame_end", EHFrameInfo.Number),
+ Asm->GetTempSymbol("eh_frame_begin", EHFrameInfo.Number), 4);
- Asm->OutStreamer.EmitLabel(getDWLabel("eh_frame_begin",EHFrameInfo.Number));
+ Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("eh_frame_begin",
+ EHFrameInfo.Number));
Asm->OutStreamer.AddComment("FDE CIE offset");
- EmitSectionOffset(getDWLabel("eh_frame_begin", EHFrameInfo.Number),
- getDWLabel("eh_frame_common",
- EHFrameInfo.PersonalityIndex),
- true, true);
+ Asm->EmitLabelDifference(
+ Asm->GetTempSymbol("eh_frame_begin", EHFrameInfo.Number),
+ Asm->GetTempSymbol("eh_frame_common",
+ EHFrameInfo.PersonalityIndex), 4);
+ MCSymbol *EHFuncBeginSym =
+ Asm->GetTempSymbol("eh_func_begin", EHFrameInfo.Number);
Asm->OutStreamer.AddComment("FDE initial location");
- EmitReference(getDWLabel("eh_func_begin", EHFrameInfo.Number), FDEEncoding);
+ Asm->EmitReference(EHFuncBeginSym, FDEEncoding);
+
Asm->OutStreamer.AddComment("FDE address range");
- EmitDifference(getDWLabel("eh_func_end", EHFrameInfo.Number),
- getDWLabel("eh_func_begin", EHFrameInfo.Number),
- SizeOfEncodedValue(FDEEncoding) == 4);
+ Asm->EmitLabelDifference(Asm->GetTempSymbol("eh_func_end",
+ EHFrameInfo.Number),
+ EHFuncBeginSym,
+ Asm->GetSizeOfEncodedValue(FDEEncoding));
// 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);
+ unsigned Size = Asm->GetSizeOfEncodedValue(LSDAEncoding);
- EmitULEB128(Size, "Augmentation size");
+ Asm->EmitULEB128(Size, "Augmentation size");
Asm->OutStreamer.AddComment("Language Specific Data Area");
if (EHFrameInfo.hasLandingPads)
- EmitReference(getDWLabel("exception", EHFrameInfo.Number),LSDAEncoding);
+ Asm->EmitReference(Asm->GetTempSymbol("exception", EHFrameInfo.Number),
+ LSDAEncoding);
else
Asm->OutStreamer.EmitIntValue(0, Size/*size*/, 0/*addrspace*/);
} else {
- EmitULEB128(0, "Augmentation size");
+ Asm->EmitULEB128(0, "Augmentation size");
}
// Indicate locations of function specific callee saved registers in frame.
- EmitFrameMoves("eh_func_begin", EHFrameInfo.Number, EHFrameInfo.Moves,
- true);
+ Asm->EmitFrameMoves(EHFrameInfo.Moves, EHFuncBeginSym, 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,
+ Asm->EmitAlignment(Asm->getTargetData().getPointerSize() == 4 ? 2 : 3,
0, 0, false);
- Asm->OutStreamer.EmitLabel(getDWLabel("eh_frame_end", EHFrameInfo.Number));
+ Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("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
// on unused functions (calling undefined externals) being dead-stripped to
// link correctly. Yes, there really is.
if (MMI->isUsedFunction(EHFrameInfo.function))
- if (MAI->hasNoDeadStrip())
+ if (Asm->MAI->hasNoDeadStrip())
Asm->OutStreamer.EmitSymbolAttribute(EHFrameInfo.FunctionEHSym,
MCSA_NoDeadStrip);
}
I = LandingPads.begin(), E = LandingPads.end(); I != E; ++I) {
const LandingPadInfo *LPI = *I;
const std::vector<int> &TypeIds = LPI->TypeIds;
- const unsigned NumShared = PrevLPI ? SharedTypeIds(LPI, PrevLPI) : 0;
+ unsigned NumShared = PrevLPI ? SharedTypeIds(LPI, PrevLPI) : 0;
unsigned SizeSiteActions = 0;
if (NumShared < TypeIds.size()) {
unsigned PrevAction = (unsigned)-1;
if (NumShared) {
- const unsigned SizePrevIds = PrevLPI->TypeIds.size();
+ unsigned SizePrevIds = PrevLPI->TypeIds.size();
assert(Actions.size());
PrevAction = Actions.size() - 1;
SizeAction =
for (unsigned I = 0, E = MI->getNumOperands(); I != E; ++I) {
const MachineOperand &MO = MI->getOperand(I);
- if (MO.isGlobal()) {
- if (Function *F = dyn_cast<Function>(MO.getGlobal())) {
- if (SawFunc) {
- // Be conservative. If we have more than one function operand for this
- // call, then we can't make the assumption that it's the callee and
- // not a parameter to the call.
- //
- // FIXME: Determine if there's a way to say that `F' is the callee or
- // parameter.
- MarkedNoUnwind = false;
- break;
- }
-
- MarkedNoUnwind = F->doesNotThrow();
- SawFunc = true;
- }
+ if (!MO.isGlobal()) continue;
+
+ Function *F = dyn_cast<Function>(MO.getGlobal());
+ if (F == 0) continue;
+
+ if (SawFunc) {
+ // Be conservative. If we have more than one function operand for this
+ // call, then we can't make the assumption that it's the callee and
+ // not a parameter to the call.
+ //
+ // FIXME: Determine if there's a way to say that `F' is the callee or
+ // parameter.
+ MarkedNoUnwind = false;
+ break;
}
+
+ MarkedNoUnwind = F->doesNotThrow();
+ SawFunc = true;
}
return MarkedNoUnwind;
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.
bool PreviousIsInvoke = false;
// Visit all instructions in order of address.
- for (MachineFunction::const_iterator I = MF->begin(), E = MF->end();
+ for (MachineFunction::const_iterator I = Asm->MF->begin(), E = Asm->MF->end();
I != E; ++I) {
for (MachineBasicBlock::const_iterator MI = I->begin(), E = I->end();
MI != E; ++MI) {
if (!MI->isLabel()) {
if (MI->getDesc().isCall())
SawPotentiallyThrowing |= !CallToNoUnwindFunction(MI);
-
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;
// create a call-site entry with no landing pad for the region between the
// try-ranges.
if (SawPotentiallyThrowing &&
- MAI->getExceptionHandlingType() == ExceptionHandling::Dwarf) {
+ Asm->MAI->getExceptionHandlingType() == ExceptionHandling::Dwarf) {
CallSiteEntry Site = { LastLabel, BeginLabel, 0, 0 };
CallSites.push_back(Site);
PreviousIsInvoke = false;
LastLabel = LandingPad->EndLabels[P.RangeIndex];
assert(BeginLabel && LastLabel && "Invalid landing pad!");
- if (LandingPad->LandingPadLabel) {
+ if (!LandingPad->LandingPadLabel) {
+ // Create a gap.
+ PreviousIsInvoke = false;
+ } else {
// This try-range is for an invoke.
CallSiteEntry Site = {
BeginLabel,
// Try to merge with the previous call-site. SJLJ doesn't do this
if (PreviousIsInvoke &&
- MAI->getExceptionHandlingType() == ExceptionHandling::Dwarf) {
+ Asm->MAI->getExceptionHandlingType() == ExceptionHandling::Dwarf) {
CallSiteEntry &Prev = CallSites.back();
if (Site.PadLabel == Prev.PadLabel && Site.Action == Prev.Action) {
// Extend the range of the previous entry.
}
// Otherwise, create a new call-site.
- if (MAI->getExceptionHandlingType() == ExceptionHandling::Dwarf)
+ if (Asm->MAI->getExceptionHandlingType() == ExceptionHandling::Dwarf)
CallSites.push_back(Site);
else {
// SjLj EH must maintain the call sites in the order assigned
CallSites[SiteNo - 1] = Site;
}
PreviousIsInvoke = true;
- } else {
- // Create a gap.
- PreviousIsInvoke = false;
}
}
}
// function may throw, create a call-site entry with no landing pad for the
// region following the try-range.
if (SawPotentiallyThrowing &&
- MAI->getExceptionHandlingType() == ExceptionHandling::Dwarf) {
+ Asm->MAI->getExceptionHandlingType() == ExceptionHandling::Dwarf) {
CallSiteEntry Site = { LastLabel, 0, 0, 0 };
CallSites.push_back(Site);
}
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.
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;
// Final tallies.
// Call sites.
- const unsigned SiteStartSize = SizeOfEncodedValue(dwarf::DW_EH_PE_udata4);
- const unsigned SiteLengthSize = SizeOfEncodedValue(dwarf::DW_EH_PE_udata4);
- const unsigned LandingPadSize = SizeOfEncodedValue(dwarf::DW_EH_PE_udata4);
- bool IsSJLJ = MAI->getExceptionHandlingType() == ExceptionHandling::SjLj;
+ bool IsSJLJ = Asm->MAI->getExceptionHandlingType() == ExceptionHandling::SjLj;
bool HaveTTData = IsSJLJ ? (!TypeInfos.empty() || !FilterIds.empty()) : true;
+
unsigned CallSiteTableLength;
-
if (IsSJLJ)
CallSiteTableLength = 0;
- else
- CallSiteTableLength = CallSites.size() *
- (SiteStartSize + SiteLengthSize + LandingPadSize);
+ else {
+ unsigned SiteStartSize = 4; // dwarf::DW_EH_PE_udata4
+ unsigned SiteLengthSize = 4; // dwarf::DW_EH_PE_udata4
+ unsigned LandingPadSize = 4; // dwarf::DW_EH_PE_udata4
+ CallSiteTableLength =
+ CallSites.size() * (SiteStartSize + SiteLengthSize + LandingPadSize);
+ }
for (unsigned i = 0, e = CallSites.size(); i < e; ++i) {
CallSiteTableLength += MCAsmInfo::getULEB128Size(CallSites[i].Action);
// For SjLj exceptions, if there is no TypeInfo, then we just explicitly say
// that we're omitting that bit.
TTypeEncoding = dwarf::DW_EH_PE_omit;
- TypeFormatSize = SizeOfEncodedValue(dwarf::DW_EH_PE_absptr);
+ // dwarf::DW_EH_PE_absptr
+ TypeFormatSize = Asm->getTargetData().getPointerSize();
} else {
// Okay, we have actual filters or typeinfos to emit. As such, we need to
// pick a type encoding for them. We're about to emit a list of pointers to
// in target-independent code.
//
TTypeEncoding = Asm->getObjFileLowering().getTTypeEncoding();
- TypeFormatSize = SizeOfEncodedValue(TTypeEncoding);
+ TypeFormatSize = Asm->GetSizeOfEncodedValue(TTypeEncoding);
}
// Begin the exception table.
Asm->EmitAlignment(2, 0, 0, false);
// Emit the LSDA.
- O << "GCC_except_table" << SubprogramCount << ":\n";
- Asm->OutStreamer.EmitLabel(getDWLabel("exception", SubprogramCount));
+ MCSymbol *GCCETSym =
+ Asm->OutContext.GetOrCreateSymbol(Twine("GCC_except_table")+
+ Twine(Asm->getFunctionNumber()));
+ Asm->OutStreamer.EmitLabel(GCCETSym);
+ Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("exception",
+ Asm->getFunctionNumber()));
- if (IsSJLJ) {
- SmallString<16> LSDAName;
- raw_svector_ostream(LSDAName) << MAI->getPrivateGlobalPrefix() <<
- "_LSDA_" << Asm->getFunctionNumber();
- O << LSDAName.str() << ":\n";
- }
+ if (IsSJLJ)
+ Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("_LSDA_",
+ Asm->getFunctionNumber()));
// Emit the LSDA header.
- EmitEncodingByte(dwarf::DW_EH_PE_omit, "@LPStart");
- EmitEncodingByte(TTypeEncoding, "@TType");
+ Asm->EmitEncodingByte(dwarf::DW_EH_PE_omit, "@LPStart");
+ Asm->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
if (HaveTTData) {
// Account for any extra padding that will be added to the call site table
// length.
- EmitULEB128(TTypeBaseOffset, "@TType base offset", SizeAlign);
+ Asm->EmitULEB128(TTypeBaseOffset, "@TType base offset", SizeAlign);
SizeAlign = 0;
}
// SjLj Exception handling
if (IsSJLJ) {
- EmitEncodingByte(dwarf::DW_EH_PE_udata4, "Call site");
+ Asm->EmitEncodingByte(dwarf::DW_EH_PE_udata4, "Call site");
// Add extra padding if it wasn't added to the TType base offset.
- EmitULEB128(CallSiteTableLength, "Call site table length", SizeAlign);
+ Asm->EmitULEB128(CallSiteTableLength, "Call site table length", SizeAlign);
// Emit the landing pad site information.
unsigned idx = 0;
// Offset of the landing pad, counted in 16-byte bundles relative to the
// @LPStart address.
- EmitULEB128(idx, "Landing pad");
+ Asm->EmitULEB128(idx, "Landing pad");
// 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
// the action table), and 0 indicates that there are no actions.
- EmitULEB128(S.Action, "Action");
+ Asm->EmitULEB128(S.Action, "Action");
}
} else {
// DWARF Exception handling
- assert(MAI->getExceptionHandlingType() == ExceptionHandling::Dwarf);
+ assert(Asm->MAI->getExceptionHandlingType() == ExceptionHandling::Dwarf);
// The call-site table is a list of all call sites that may throw an
// exception (including C++ 'throw' statements) in the procedure
// supposed to throw.
// Emit the landing pad call site table.
- EmitEncodingByte(dwarf::DW_EH_PE_udata4, "Call site");
+ Asm->EmitEncodingByte(dwarf::DW_EH_PE_udata4, "Call site");
// Add extra padding if it wasn't added to the TType base offset.
- EmitULEB128(CallSiteTableLength, "Call site table length", SizeAlign);
+ Asm->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 =
+ Asm->GetTempSymbol("eh_func_begin", Asm->getFunctionNumber());
+
+ MCSymbol *BeginLabel = S.BeginLabel;
+ if (BeginLabel == 0)
+ BeginLabel = EHFuncBeginSym;
+ MCSymbol *EndLabel = S.EndLabel;
+ if (EndLabel == 0)
+ EndLabel = Asm->GetTempSymbol("eh_func_end", Asm->getFunctionNumber());
+
// 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.
Asm->OutStreamer.AddComment("Region start");
- EmitSectionOffset(getDWLabel(BeginTag, BeginNumber),
- getDWLabel("eh_func_begin", SubprogramCount),
- true, true);
-
+ Asm->EmitLabelDifference(BeginLabel, EHFuncBeginSym, 4);
+
Asm->OutStreamer.AddComment("Region length");
- if (!S.EndLabel)
- EmitDifference(getDWLabel("eh_func_end", SubprogramCount),
- getDWLabel(BeginTag, BeginNumber),
- true);
- else
- EmitDifference(getDWLabel("label", S.EndLabel),
- getDWLabel(BeginTag, BeginNumber), true);
+ Asm->EmitLabelDifference(EndLabel, BeginLabel, 4);
// Offset of the landing pad, counted in 16-byte bundles relative to the
// @LPStart address.
Asm->OutStreamer.AddComment("Landing pad");
- if (!S.PadLabel) {
+ if (!S.PadLabel)
Asm->OutStreamer.EmitIntValue(0, 4/*size*/, 0/*addrspace*/);
- } else {
- EmitSectionOffset(getDWLabel("label", S.PadLabel),
- getDWLabel("eh_func_begin", SubprogramCount),
- true, true);
- }
+ else
+ Asm->EmitLabelDifference(S.PadLabel, EHFuncBeginSym, 4);
// 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
// the action table), and 0 indicates that there are no actions.
- EmitULEB128(S.Action, "Action");
+ Asm->EmitULEB128(S.Action, "Action");
}
}
//
// Used by the runtime to match the type of the thrown exception to the
// type of the catch clauses or the types in the exception specification.
- EmitSLEB128(Action.ValueForTypeID, " TypeInfo index");
+ Asm->EmitSLEB128(Action.ValueForTypeID, " TypeInfo index");
// Action Record
//
// Self-relative signed displacement in bytes of the next action record,
// or 0 if there is no next action record.
- EmitSLEB128(Action.NextAction, " Next action");
+ Asm->EmitSLEB128(Action.NextAction, " Next action");
}
// Emit the Catch TypeInfos.
Asm->OutStreamer.AddComment("TypeInfo");
if (GV)
- EmitReference(GV, TTypeEncoding);
+ Asm->EmitReference(GV, TTypeEncoding);
else
- Asm->OutStreamer.EmitIntValue(0, SizeOfEncodedValue(TTypeEncoding), 0);
+ Asm->OutStreamer.EmitIntValue(0,Asm->GetSizeOfEncodedValue(TTypeEncoding),
+ 0);
}
// Emit the Exception Specifications.
for (std::vector<unsigned>::const_iterator
I = FilterIds.begin(), E = FilterIds.end(); I < E; ++I) {
unsigned TypeID = *I;
- EmitULEB128(TypeID, TypeID != 0 ? "Exception specification" : 0);
+ Asm->EmitULEB128(TypeID, TypeID != 0 ? "Exception specification" : 0);
}
Asm->EmitAlignment(2, 0, 0, false);
/// EndModule - Emit all exception information that should come after the
/// content.
void DwarfException::EndModule() {
- if (MAI->getExceptionHandlingType() != ExceptionHandling::Dwarf)
+ NamedRegionTimer T(EHTimerName, DWARFGroupName);
+
+ if (Asm->MAI->getExceptionHandlingType() != ExceptionHandling::Dwarf)
return;
if (!shouldEmitMovesModule && !shouldEmitTableModule)
return;
- if (TimePassesIsEnabled)
- ExceptionTimer->startTimer();
-
const std::vector<Function *> Personalities = MMI->getPersonalities();
for (unsigned I = 0, E = Personalities.size(); I < E; ++I)
for (std::vector<FunctionEHFrameInfo>::iterator
I = EHFrames.begin(), E = EHFrames.end(); I != E; ++I)
EmitFDE(*I);
-
- if (TimePassesIsEnabled)
- ExceptionTimer->stopTimer();
}
/// BeginFunction - Gather pre-function exception information. Assumes it's
/// being emitted immediately after the function entry point.
void DwarfException::BeginFunction(const MachineFunction *MF) {
- if (!MMI || !MAI->doesSupportExceptionHandling()) return;
-
- if (TimePassesIsEnabled)
- ExceptionTimer->startTimer();
-
- this->MF = MF;
+ NamedRegionTimer T(EHTimerName, DWARFGroupName);
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 =
+ !Asm->MF->getFunction()->doesNotThrow() || UnwindTablesMandatory;
if (shouldEmitMoves || shouldEmitTable)
// Assumes in correct section after the entry point.
- Asm->OutStreamer.EmitLabel(getDWLabel("eh_func_begin", ++SubprogramCount));
+ Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("eh_func_begin",
+ Asm->getFunctionNumber()));
shouldEmitTableModule |= shouldEmitTable;
shouldEmitMovesModule |= shouldEmitMoves;
-
- if (TimePassesIsEnabled)
- ExceptionTimer->stopTimer();
}
/// EndFunction - Gather and emit post-function exception information.
///
void DwarfException::EndFunction() {
+ NamedRegionTimer T(EHTimerName, DWARFGroupName);
if (!shouldEmitMoves && !shouldEmitTable) return;
- if (TimePassesIsEnabled)
- ExceptionTimer->startTimer();
+ Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("eh_func_end",
+ Asm->getFunctionNumber()));
+
+ // 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();
- Asm->OutStreamer.EmitLabel(getDWLabel("eh_func_end", SubprogramCount));
- EmitExceptionTable();
+ if (HasLandingPad)
+ EmitExceptionTable();
+ const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering();
MCSymbol *FunctionEHSym =
- Asm->GetSymbolWithGlobalValueBase(MF->getFunction(), ".eh",
- Asm->MAI->is_EHSymbolPrivate());
+ Asm->GetSymbolWithGlobalValueBase(Asm->MF->getFunction(), ".eh",
+ TLOF.isFunctionEHFrameSymbolPrivate());
// Save EH frame information
- EHFrames.push_back(FunctionEHFrameInfo(FunctionEHSym, SubprogramCount,
+ EHFrames.push_back(FunctionEHFrameInfo(FunctionEHSym,
+ Asm->getFunctionNumber(),
MMI->getPersonalityIndex(),
- MF->getFrameInfo()->hasCalls(),
+ Asm->MF->getFrameInfo()->hasCalls(),
!MMI->getLandingPads().empty(),
MMI->getFrameMoves(),
- MF->getFunction()));
-
- // Record if this personality index uses a landing pad.
- UsesLSDA[MMI->getPersonalityIndex()] |= !MMI->getLandingPads().empty();
-
- if (TimePassesIsEnabled)
- ExceptionTimer->stopTimer();
+ Asm->MF->getFunction()));
}
projects / oota-llvm.git / blobdiff