DwarfDebug.cpp File Reference

#include "DwarfDebug.h"
#include "ByteStreamer.h"
#include "DIEHash.h"
#include "DebugLocEntry.h"
#include "DebugLocStream.h"
#include "DwarfCompileUnit.h"
#include "DwarfExpression.h"
#include "DwarfFile.h"
#include "DwarfUnit.h"
#include "llvm/ADT/APInt.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/DenseSet.h"
#include "llvm/ADT/MapVector.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/Triple.h"
#include "llvm/ADT/Twine.h"
#include "llvm/BinaryFormat/Dwarf.h"
#include "llvm/CodeGen/AccelTable.h"
#include "llvm/CodeGen/AsmPrinter.h"
#include "llvm/CodeGen/DIE.h"
#include "llvm/CodeGen/LexicalScopes.h"
#include "llvm/CodeGen/MachineBasicBlock.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/CodeGen/MachineOperand.h"
#include "llvm/CodeGen/TargetInstrInfo.h"
#include "llvm/CodeGen/TargetRegisterInfo.h"
#include "llvm/CodeGen/TargetSubtargetInfo.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DebugInfoMetadata.h"
#include "llvm/IR/DebugLoc.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/GlobalVariable.h"
#include "llvm/IR/Module.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCDwarf.h"
#include "llvm/MC/MCSection.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/MC/MCTargetOptions.h"
#include "llvm/MC/MachineLocation.h"
#include "llvm/MC/SectionKind.h"
#include "llvm/Pass.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/MD5.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/Timer.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Target/TargetLoweringObjectFile.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetOptions.h"
#include <algorithm>
#include <cassert>
#include <cstddef>
#include <cstdint>
#include <iterator>
#include <string>
#include <utility>
#include <vector>

Go to the source code of this file.

Classes
struct	ArangeSpan

Macros
#define	DEBUG_TYPE   "dwarfdebug"

Enumerations
enum	DefaultOnOff {   Default, Enable, Disable, Default,   Enable, Disable }
enum	LinkageNameOption { DefaultLinkageNames, AllLinkageNames, AbstractLinkageNames }

Functions
static AccelTableKind	computeAccelTableKind (unsigned DwarfVersion, bool GenerateTypeUnits, DebuggerKind Tuning, const Triple &TT)
static bool	isObjCClass (StringRef Name)
static bool	hasObjCCategory (StringRef Name)
static void	getObjCClassCategory (StringRef In, StringRef &Class, StringRef &Category)
static StringRef	getObjCMethodName (StringRef In)
template<typename Func >
static void	forBothCUs (DwarfCompileUnit &CU, Func F)
static SmallVectorImpl< DwarfCompileUnit::GlobalExpr > &	sortGlobalExprs (SmallVectorImpl< DwarfCompileUnit::GlobalExpr > &GVEs)
	Sort and unique GVEs by comparing their fragment offset. More...
static DebugLocEntry::Value	getDebugLocValue (const MachineInstr *MI)
static bool	validThroughout (LexicalScopes &LScopes, const MachineInstr *DbgValue, const MachineInstr *RangeEnd)
	Determine whether a singular DBG_VALUE is valid for the entirety of its enclosing lexical scope. More...
static DebugLoc	findPrologueEndLoc (const MachineFunction *MF)
static void	recordSourceLine (AsmPrinter &Asm, unsigned Line, unsigned Col, const MDNode *S, unsigned Flags, unsigned CUID, uint16_t DwarfVersion, ArrayRef< std::unique_ptr< DwarfCompileUnit >> DCUs)
	Register a source line with debug info. More...
static dwarf::PubIndexEntryDescriptor	computeIndexValue (DwarfUnit *CU, const DIE *Die)
	computeIndexValue - Compute the gdb index value for the DIE and CU. More...
static void	emitDebugLocValue (const AsmPrinter &AP, const DIBasicType *BT, const DebugLocEntry::Value &Value, DwarfExpression &DwarfExpr)
static void	emitListsTableHeaderStart (AsmPrinter *Asm, const DwarfFile &Holder, MCSymbol *TableStart, MCSymbol *TableEnd)
static MCSymbol *	emitRnglistsTableHeader (AsmPrinter *Asm, const DwarfFile &Holder)
static MCSymbol *	emitLoclistsTableHeader (AsmPrinter *Asm, const DwarfFile &Holder)
static void	emitRangeList (DwarfDebug &DD, AsmPrinter *Asm, const RangeSpanList &List)
	Emit a single range list. We handle both DWARF v5 and earlier. More...
static void	emitDebugRangesImpl (DwarfDebug &DD, AsmPrinter *Asm, const DwarfFile &Holder, MCSymbol *TableEnd)

Variables
static cl::opt< bool >	DisableDebugInfoPrinting ("disable-debug-info-print", cl::Hidden, cl::desc("Disable debug info printing"))
static cl::opt< bool >	UseDwarfRangesBaseAddressSpecifier ("use-dwarf-ranges-base-address-specifier", cl::Hidden, cl::desc("Use base address specifiers in debug_ranges"), cl::init(false))
static cl::opt< bool >	GenerateARangeSection ("generate-arange-section", cl::Hidden, cl::desc("Generate dwarf aranges"), cl::init(false))
static cl::opt< bool >	GenerateDwarfTypeUnits ("generate-type-units", cl::Hidden, cl::desc("Generate DWARF4 type units."), cl::init(false))
static cl::opt< bool >	SplitDwarfCrossCuReferences ("split-dwarf-cross-cu-references", cl::Hidden, cl::desc("Enable cross-cu references in DWO files"), cl::init(false))
static cl::opt< DefaultOnOff >	UnknownLocations ("use-unknown-locations", cl::Hidden, cl::desc("Make an absence of debug location information explicit."), cl::values(clEnumVal(Default, "At top of block or after label"), clEnumVal(Enable, "In all cases"), clEnumVal(Disable, "Never")), cl::init(Default))
static cl::opt< AccelTableKind >	AccelTables ("accel-tables", cl::Hidden, cl::desc("Output dwarf accelerator tables."), cl::values(clEnumValN(AccelTableKind::Default, "Default", "Default for platform"), clEnumValN(AccelTableKind::None, "Disable", "Disabled."), clEnumValN(AccelTableKind::Apple, "Apple", "Apple"), clEnumValN(AccelTableKind::Dwarf, "Dwarf", "DWARF")), cl::init(AccelTableKind::Default))
static cl::opt< DefaultOnOff >	DwarfInlinedStrings ("dwarf-inlined-strings", cl::Hidden, cl::desc("Use inlined strings rather than string section."), cl::values(clEnumVal(Default, "Default for platform"), clEnumVal(Enable, "Enabled"), clEnumVal(Disable, "Disabled")), cl::init(Default))
static cl::opt< bool >	NoDwarfRangesSection ("no-dwarf-ranges-section", cl::Hidden, cl::desc("Disable emission .debug_ranges section."), cl::init(false))
static cl::opt< DefaultOnOff >	DwarfSectionsAsReferences ("dwarf-sections-as-references", cl::Hidden, cl::desc("Use sections+offset as references rather than labels."), cl::values(clEnumVal(Default, "Default for platform"), clEnumVal(Enable, "Enabled"), clEnumVal(Disable, "Disabled")), cl::init(Default))
static cl::opt< LinkageNameOption >	DwarfLinkageNames ("dwarf-linkage-names", cl::Hidden, cl::desc("Which DWARF linkage-name attributes to emit."), cl::values(clEnumValN(DefaultLinkageNames, "Default", "Default for platform"), clEnumValN(AllLinkageNames, "All", "All"), clEnumValN(AbstractLinkageNames, "Abstract", "Abstract subprograms")), cl::init(DefaultLinkageNames))
static const char *const	DWARFGroupName = "dwarf"
static const char *const	DWARFGroupDescription = "DWARF Emission"
static const char *const	DbgTimerName = "writer"
static const char *const	DbgTimerDescription = "DWARF Debug Writer"

Macro Definition Documentation

DEBUG_TYPE

#define DEBUG_TYPE   "dwarfdebug"

Definition at line 82 of file DwarfDebug.cpp.

Enumeration Type Documentation

DefaultOnOff

enum DefaultOnOff

Enumerator
Default
Enable
Disable
Default
Enable
Disable

Definition at line 106 of file DwarfDebug.cpp.

LinkageNameOption

enum LinkageNameOption

Enumerator
DefaultLinkageNames
AllLinkageNames
AbstractLinkageNames

Definition at line 144 of file DwarfDebug.cpp.

Function Documentation

computeAccelTableKind()

static AccelTableKind computeAccelTableKind ( unsigned  DwarfVersion, bool  GenerateTypeUnits, DebuggerKind  Tuning, const Triple &  TT  )

static

Definition at line 287 of file DwarfDebug.cpp.

References AccelTables, llvm::Apple, llvm::Default, llvm::Dwarf, llvm::Triple::isOSBinFormatMachO(), llvm::LLDB, and llvm::None.

Referenced by llvm::DwarfDebug::DwarfDebug().

computeIndexValue()

static dwarf::PubIndexEntryDescriptor computeIndexValue ( DwarfUnit *  CU, const DIE *  Die  )

static

computeIndexValue - Compute the gdb index value for the DIE and CU.

Definition at line 1771 of file DwarfDebug.cpp.

References llvm::DebugHandlerBase::Asm, llvm::AsmPrinter::createTempSymbol(), llvm::dwarf::DW_PUBNAMES_VERSION, llvm::AsmPrinter::EmitDwarfOffset(), llvm::AsmPrinter::emitDwarfSymbolReference(), llvm::AsmPrinter::emitInt16(), llvm::AsmPrinter::emitInt32(), llvm::AsmPrinter::emitInt8(), llvm::AsmPrinter::EmitLabelDifference(), llvm::DwarfFile::emitStrings(), llvm::DIE::findAttribute(), llvm::dwarf::GDBIndexEntryKindString(), llvm::dwarf::GDBIndexEntryLinkageString(), llvm::MCSection::getBeginSymbol(), llvm::DwarfUnit::getCUNode(), llvm::DIEUnit::getDebugSectionOffset(), llvm::MCObjectFileInfo::getDwarfGnuPubNamesSection(), llvm::MCObjectFileInfo::getDwarfGnuPubTypesSection(), llvm::MCObjectFileInfo::getDwarfPubNamesSection(), llvm::MCObjectFileInfo::getDwarfPubTypesSection(), llvm::MCObjectFileInfo::getDwarfStrOffSection(), llvm::MCObjectFileInfo::getDwarfStrSection(), llvm::DwarfCompileUnit::getGlobalNames(), llvm::DwarfCompileUnit::getGlobalTypes(), llvm::DwarfCompileUnit::getLabelBegin(), llvm::DwarfUnit::getLanguage(), llvm::DwarfCompileUnit::getLength(), llvm::DICompileUnit::getNameTableKind(), llvm::AsmPrinter::getObjFileLowering(), llvm::DIE::getOffset(), llvm::DIEUnit::getSection(), llvm::DwarfCompileUnit::getSkeleton(), llvm::DIE::getTag(), llvm::dwarf::GIEK_FUNCTION, llvm::dwarf::GIEK_NONE, llvm::dwarf::GIEK_TYPE, llvm::dwarf::GIEK_VARIABLE, llvm::dwarf::GIEL_EXTERNAL, llvm::dwarf::GIEL_STATIC, llvm::DICompileUnit::GNU, llvm::DwarfCompileUnit::hasDwarfPubSections(), llvm::dwarf::PubIndexEntryDescriptor::Kind, llvm::dwarf::PubIndexEntryDescriptor::Linkage, Name, llvm::AsmPrinter::OutStreamer, llvm::dwarf::PubIndexEntryDescriptor::toBits(), llvm::DwarfDebug::useSectionsAsReferences(), llvm::DwarfDebug::useSegmentedStringOffsetsTable(), and llvm::DwarfDebug::useSplitDwarf().

emitDebugLocValue()

static void emitDebugLocValue ( const AsmPrinter &  AP, const DIBasicType *  BT, const DebugLocEntry::Value &  Value, DwarfExpression &  DwarfExpr  )

static

Definition at line 1923 of file DwarfDebug.cpp.

References llvm::DwarfExpression::addExpression(), llvm::DwarfExpression::addFragmentOffset(), llvm::DwarfExpression::addMachineRegExpression(), llvm::DwarfExpression::addSignedConstant(), llvm::DwarfExpression::addUnsignedConstant(), llvm::APFloat::bitcastToAPInt(), llvm::DebugLocEntry::Value::getConstantFP(), llvm::DIBasicType::getEncoding(), llvm::DebugLocEntry::Value::getExpression(), llvm::DebugLocEntry::Value::getInt(), llvm::DebugLocEntry::Value::getLoc(), llvm::MachineLocation::getReg(), llvm::TargetSubtargetInfo::getRegisterInfo(), llvm::MachineFunction::getSubtarget(), llvm::ConstantFP::getValueAPF(), llvm::DebugLocEntry::Value::isConstantFP(), llvm::MachineLocation::isIndirect(), llvm::DebugLocEntry::Value::isInt(), llvm::DebugLocEntry::Value::isLocation(), llvm::AsmPrinter::MF, and llvm::DwarfExpression::setMemoryLocationKind().

emitDebugRangesImpl()

static void emitDebugRangesImpl ( DwarfDebug &  DD, AsmPrinter *  Asm, const DwarfFile &  Holder, MCSymbol *  TableEnd  )

static

Definition at line 2403 of file DwarfDebug.cpp.

References llvm::all_of(), llvm::DebugHandlerBase::Asm, assert(), llvm::dwarf::DW_MACINFO_end_file, llvm::dwarf::DW_MACINFO_start_file, llvm::AsmPrinter::emitInt8(), emitRangeList(), emitRnglistsTableHeader(), llvm::AsmPrinter::EmitULEB128(), llvm::StringRef::empty(), F(), llvm::DwarfUnit::getCUNode(), llvm::DIScope::getDirectory(), llvm::MCObjectFileInfo::getDwarfAbbrevDWOSection(), llvm::MCObjectFileInfo::getDwarfAddrSection(), llvm::MCObjectFileInfo::getDwarfInfoSection(), llvm::MCObjectFileInfo::getDwarfLineDWOSection(), llvm::MCObjectFileInfo::getDwarfMacinfoSection(), llvm::MCObjectFileInfo::getDwarfRangesSection(), llvm::MCObjectFileInfo::getDwarfRnglistsDWOSection(), llvm::MCObjectFileInfo::getDwarfRnglistsSection(), llvm::MCObjectFileInfo::getDwarfStrDWOSection(), llvm::MCObjectFileInfo::getDwarfStrOffDWOSection(), llvm::DwarfDebug::getDwarfVersion(), llvm::DIMacroFile::getElements(), llvm::DIScope::getFile(), llvm::DIMacroFile::getFile(), llvm::DIScope::getFilename(), llvm::DIMacro::getLine(), llvm::DIMacroFile::getLine(), llvm::DIMacroNode::getMacinfoType(), llvm::DwarfCompileUnit::getMacroLabelBegin(), llvm::DwarfUnit::getMD5AsBytes(), llvm::DIMacro::getName(), llvm::AsmPrinter::getObjFileLowering(), llvm::DwarfCompileUnit::getOrCreateSourceID(), llvm::DwarfFile::getRangeLists(), llvm::DwarfCompileUnit::getSkeleton(), llvm::DIScope::getSource(), llvm::DwarfCompileUnit::getUniqueID(), llvm::DIEUnit::getUnitDie(), llvm::DIMacro::getValue(), llvm::DICompileUnit::isDebugDirectivesOnly(), List, llvm_unreachable, llvm::none_of(), llvm::AsmPrinter::OutStreamer, P, llvm::DIEUnit::setSection(), llvm::DwarfDebug::useRangesSection(), llvm::DwarfDebug::useSegmentedStringOffsetsTable(), and llvm::DwarfDebug::useSplitDwarf().

emitListsTableHeaderStart()

static void emitListsTableHeaderStart ( AsmPrinter *  Asm, const DwarfFile &  Holder, MCSymbol *  TableStart, MCSymbol *  TableEnd  )

static

Definition at line 1991 of file DwarfDebug.cpp.

References llvm::AsmPrinter::emitInt16(), llvm::AsmPrinter::emitInt8(), llvm::AsmPrinter::EmitLabelDifference(), llvm::MCAsmInfo::getCodePointerSize(), llvm::AsmPrinter::MAI, and llvm::AsmPrinter::OutStreamer.

Referenced by emitLoclistsTableHeader(), and emitRnglistsTableHeader().

emitLoclistsTableHeader()

static MCSymbol* emitLoclistsTableHeader ( AsmPrinter *  Asm, const DwarfFile &  Holder  )

static

Definition at line 2032 of file DwarfDebug.cpp.

References llvm::DebugHandlerBase::Asm, llvm::AsmPrinter::createTempSymbol(), llvm::dwarf::DW_LLE_end_of_list, llvm::dwarf::DW_LLE_offset_pair, llvm::dwarf::DW_LLE_startx_length, llvm::DwarfDebug::emitDebugLocEntryLocation(), llvm::AsmPrinter::emitInt32(), llvm::AsmPrinter::emitInt8(), llvm::AsmPrinter::EmitLabelDifference(), llvm::AsmPrinter::EmitLabelDifferenceAsULEB128(), emitListsTableHeaderStart(), llvm::AsmPrinter::EmitULEB128(), llvm::DwarfCompileUnit::getBaseAddress(), llvm::MCAsmInfo::getCodePointerSize(), llvm::MCObjectFileInfo::getDwarfLocDWOSection(), llvm::MCObjectFileInfo::getDwarfLoclistsSection(), llvm::MCObjectFileInfo::getDwarfLocSection(), llvm::DwarfDebug::getDwarfVersion(), llvm::DebugLocStream::getEntries(), llvm::AddressPool::getIndex(), llvm::DebugLocStream::getLists(), llvm::DwarfFile::getLoclistsTableBaseSym(), llvm::AsmPrinter::getObjFileLowering(), List, llvm::AsmPrinter::MAI, llvm::AsmPrinter::OutStreamer, Size, and llvm::DwarfDebug::useSplitDwarf().

emitRangeList()

static void emitRangeList ( DwarfDebug &  DD, AsmPrinter *  Asm, const RangeSpanList &  List  )

static

Emit a single range list. We handle both DWARF v5 and earlier.

Definition at line 2312 of file DwarfDebug.cpp.

References assert(), llvm::AsmPrinter::EmitULEB128(), llvm::DwarfDebug::getAddressPool(), llvm::DwarfCompileUnit::getBaseAddress(), llvm::MCAsmInfo::getCodePointerSize(), llvm::RangeSpanList::getCU(), llvm::DwarfUnit::getCUNode(), llvm::DwarfDebug::getDwarfVersion(), llvm::AddressPool::getIndex(), llvm::RangeSpanList::getRanges(), llvm::DICompileUnit::getRangesBaseAddress(), llvm::DwarfDebug::getSectionLabel(), llvm::RangeSpanList::getSym(), llvm::AsmPrinter::MAI, llvm::AsmPrinter::OutStreamer, P, and Size.

Referenced by emitDebugRangesImpl().

emitRnglistsTableHeader()

static MCSymbol* emitRnglistsTableHeader ( AsmPrinter *  Asm, const DwarfFile &  Holder  )

static

Definition at line 2012 of file DwarfDebug.cpp.

References llvm::AsmPrinter::createTempSymbol(), llvm::AsmPrinter::emitInt32(), llvm::AsmPrinter::EmitLabelDifference(), emitListsTableHeaderStart(), llvm::DwarfFile::getRangeLists(), llvm::DwarfFile::getRnglistsTableBaseSym(), List, and llvm::AsmPrinter::OutStreamer.

Referenced by emitDebugRangesImpl().

findPrologueEndLoc()

static DebugLoc findPrologueEndLoc ( const MachineFunction *  MF )

static

Definition at line 1512 of file DwarfDebug.cpp.

References llvm::MachineInstr::FrameSetup, and MI.

Referenced by llvm::DwarfDebug::emitInitialLocDirective().

forBothCUs()

template<typename Func >

static void forBothCUs ( DwarfCompileUnit &  CU, Func  F  )

static

Definition at line 469 of file DwarfDebug.cpp.

References F(), llvm::DwarfUnit::getCUNode(), llvm::DwarfCompileUnit::getSkeleton(), and llvm::DICompileUnit::getSplitDebugInlining().

Referenced by llvm::DwarfDebug::beginModule().

getDebugLocValue()

static DebugLocEntry::Value getDebugLocValue ( const MachineInstr *  MI )

static

Definition at line 1062 of file DwarfDebug.cpp.

References assert(), llvm::MachineOperand::getCImm(), llvm::MachineInstr::getDebugExpression(), llvm::MachineOperand::getFPImm(), llvm::MachineOperand::getImm(), llvm::MachineInstr::getNumOperands(), llvm::MachineInstr::getOperand(), llvm::MachineOperand::isCImm(), llvm::MachineOperand::isFPImm(), llvm::MachineOperand::isImm(), llvm::MachineOperand::isReg(), and llvm_unreachable.

getObjCClassCategory()

static void getObjCClassCategory ( StringRef  In, StringRef &  Class, StringRef &  Category  )

static

Definition at line 401 of file DwarfDebug.cpp.

References llvm::StringRef::find(), hasObjCCategory(), and llvm::StringRef::slice().

Referenced by llvm::DwarfDebug::addSubprogramNames().

getObjCMethodName()

static StringRef getObjCMethodName ( StringRef  In )

static

Definition at line 413 of file DwarfDebug.cpp.

References llvm::StringRef::find(), and llvm::StringRef::slice().

Referenced by llvm::DwarfDebug::addSubprogramNames().

hasObjCCategory()

static bool hasObjCCategory ( StringRef  Name )

static

Definition at line 394 of file DwarfDebug.cpp.

References llvm::StringRef::find(), isObjCClass(), and llvm::StringRef::npos.

Referenced by getObjCClassCategory().

isObjCClass()

static bool isObjCClass ( StringRef  Name )

static

Definition at line 390 of file DwarfDebug.cpp.

References llvm::StringRef::startswith().

Referenced by llvm::DwarfDebug::addSubprogramNames(), and hasObjCCategory().

recordSourceLine()

static void recordSourceLine ( AsmPrinter &  Asm, unsigned  Line, unsigned  Col, const MDNode *  S, unsigned  Flags, unsigned  CUID, uint16_t  DwarfVersion, ArrayRef< std::unique_ptr< DwarfCompileUnit >>  DCUs  )

static

Register a source line with debug info.

Returns the unique label that was emitted and which provides correspondence to the source line list.

Definition at line 1525 of file DwarfDebug.cpp.

References llvm::AsmPrinter::OutStreamer.

sortGlobalExprs()

static SmallVectorImpl<DwarfCompileUnit::GlobalExpr>& sortGlobalExprs ( SmallVectorImpl< DwarfCompileUnit::GlobalExpr > &  GVEs )

static

Sort and unique GVEs by comparing their fragment offset.

Definition at line 675 of file DwarfDebug.cpp.

References B, llvm::SmallVectorTemplateCommon< T >::begin(), llvm::SmallVectorTemplateCommon< T >::end(), llvm::SmallVectorImpl< T >::erase(), llvm::DwarfCompileUnit::GlobalExpr::Expr, llvm::DIExpression::getFragmentInfo(), and llvm::sort().

Referenced by llvm::DwarfDebug::beginModule().

validThroughout()

static bool validThroughout ( LexicalScopes &  LScopes, const MachineInstr *  DbgValue, const MachineInstr *  RangeEnd  )

static

Determine whether a singular DBG_VALUE is valid for the entirety of its enclosing lexical scope.

The check ensures there are no other instructions in the same lexical scope preceding the DBG_VALUE and that its range is either open or otherwise rolls off the end of the scope.

Definition at line 1259 of file DwarfDebug.cpp.

References llvm::DebugHandlerBase::Asm, assert(), llvm::detail::DenseSetImpl< ValueT, DenseMap< ValueT, detail::DenseSetEmpty, ValueInfoT, detail::DenseSetPair< ValueT > >, ValueInfoT >::count(), llvm::DebugHandlerBase::DbgLabels, llvm::DebugHandlerBase::DbgValues, llvm::dyn_cast(), llvm::SmallVectorBase::empty(), llvm::LexicalScopes::findInlinedScope(), llvm::LexicalScopes::findLexicalScope(), llvm::MachineInstr::FrameSetup, llvm::SmallVectorTemplateCommon< T, typename >::front(), llvm::MachineInstr::getDebugLoc(), llvm::DebugHandlerBase::getLabelBeforeInsn(), llvm::MachineInstr::getOperand(), llvm::MachineInstr::getParent(), llvm::LexicalScope::getRanges(), llvm::DILocalVariable::getScope(), llvm::DILabel::getScope(), llvm::DIVariable::getType(), I, llvm::DbgVariable::initializeDbgValue(), llvm::detail::DenseSetImpl< ValueT, DenseMap< ValueT, detail::DenseSetEmpty, ValueInfoT, detail::DenseSetPair< ValueT > >, ValueInfoT >::insert(), llvm::MachineOperand::isImm(), List, llvm::lltok::LocalVar, llvm::DebugHandlerBase::LScopes, MI, llvm::SmallVectorBase::size(), and llvm::DwarfDebug::useLocSection().

Variable Documentation

AccelTables

cl::opt<AccelTableKind> AccelTables("accel-tables", cl::Hidden, cl::desc("Output dwarf accelerator tables."), cl::values(clEnumValN(AccelTableKind::Default, "Default", "Default for platform"), clEnumValN(AccelTableKind::None, "Disable", "Disabled."), clEnumValN(AccelTableKind::Apple, "Apple", "Apple"), clEnumValN(AccelTableKind::Dwarf, "Dwarf", "DWARF")), cl::init(AccelTableKind::Default))

static

Referenced by computeAccelTableKind().

DbgTimerDescription

const char* const DbgTimerDescription = "DWARF Debug Writer"

static

Definition at line 163 of file DwarfDebug.cpp.

DbgTimerName

const char* const DbgTimerName = "writer"

static

Definition at line 162 of file DwarfDebug.cpp.

DisableDebugInfoPrinting

cl::opt<bool> DisableDebugInfoPrinting("disable-debug-info-print", cl::Hidden, cl::desc("Disable debug info printing"))

static

Referenced by llvm::DwarfDebug::beginModule().

DWARFGroupDescription

const char* const DWARFGroupDescription = "DWARF Emission"

static

Definition at line 161 of file DwarfDebug.cpp.

DWARFGroupName

const char* const DWARFGroupName = "dwarf"

static

Definition at line 160 of file DwarfDebug.cpp.

DwarfInlinedStrings

cl::opt<DefaultOnOff> DwarfInlinedStrings("dwarf-inlined-strings", cl::Hidden, cl::desc("Use inlined strings rather than string section."), cl::values(clEnumVal(Default, "Default for platform"), clEnumVal(Enable, "Enabled"), clEnumVal(Disable, "Disabled")), cl::init(Default))

static

DwarfLinkageNames

cl::opt<LinkageNameOption> DwarfLinkageNames("dwarf-linkage-names", cl::Hidden, cl::desc("Which DWARF linkage-name attributes to emit."), cl::values(clEnumValN(DefaultLinkageNames, "Default", "Default for platform"), clEnumValN(AllLinkageNames, "All", "All"), clEnumValN(AbstractLinkageNames, "Abstract", "Abstract subprograms")), cl::init(DefaultLinkageNames))

static

Referenced by llvm::DwarfDebug::DwarfDebug().

DwarfSectionsAsReferences

cl::opt<DefaultOnOff> DwarfSectionsAsReferences("dwarf-sections-as-references", cl::Hidden, cl::desc("Use sections+offset as references rather than labels."), cl::values(clEnumVal(Default, "Default for platform"), clEnumVal(Enable, "Enabled"), clEnumVal(Disable, "Disabled")), cl::init(Default))

static

GenerateARangeSection

cl::opt<bool> GenerateARangeSection("generate-arange-section", cl::Hidden, cl::desc("Generate dwarf aranges"), cl::init(false))

static

Referenced by llvm::DwarfDebug::endModule().

GenerateDwarfTypeUnits

cl::opt<bool> GenerateDwarfTypeUnits("generate-type-units", cl::Hidden, cl::desc("Generate DWARF4 type units."), cl::init(false))

static

Referenced by llvm::DwarfDebug::DwarfDebug().

NoDwarfRangesSection

cl::opt<bool> NoDwarfRangesSection("no-dwarf-ranges-section", cl::Hidden, cl::desc("Disable emission .debug_ranges section."), cl::init(false))

static

SplitDwarfCrossCuReferences

cl::opt<bool> SplitDwarfCrossCuReferences("split-dwarf-cross-cu-references", cl::Hidden, cl::desc("Enable cross-cu references in DWO files"), cl::init(false))

static

Referenced by llvm::DwarfDebug::shareAcrossDWOCUs().

UnknownLocations

cl::opt<DefaultOnOff> UnknownLocations("use-unknown-locations", cl::Hidden, cl::desc("Make an absence of debug location information explicit."), cl::values(clEnumVal(Default, "At top of block or after label"), clEnumVal(Enable, "In all cases"), clEnumVal(Disable, "Never")), cl::init(Default))

static

UseDwarfRangesBaseAddressSpecifier

cl::opt<bool> UseDwarfRangesBaseAddressSpecifier("use-dwarf-ranges-base-address-specifier", cl::Hidden, cl::desc("Use base address specifiers in debug_ranges"), cl::init(false))

static