#include "DwarfDebug.h"
#include "ByteStreamer.h"
#include "DIEHash.h"
#include "DwarfCompileUnit.h"
#include "DwarfExpression.h"
#include "DwarfUnit.h"
#include "llvm/ADT/APInt.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/Twine.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/MachineModuleInfo.h"
#include "llvm/CodeGen/MachineOperand.h"
#include "llvm/CodeGen/TargetInstrInfo.h"
#include "llvm/CodeGen/TargetLowering.h"
#include "llvm/CodeGen/TargetRegisterInfo.h"
#include "llvm/CodeGen/TargetSubtargetInfo.h"
#include "llvm/DebugInfo/DWARF/DWARFDataExtractor.h"
#include "llvm/DebugInfo/DWARF/DWARFExpression.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DebugInfoMetadata.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/MCSection.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/MC/MCTargetOptions.h"
#include "llvm/MC/MachineLocation.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/raw_ostream.h"
#include "llvm/Target/TargetLoweringObjectFile.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/TargetParser/Triple.h"
#include <algorithm>
#include <cstddef>
#include <iterator>
#include <optional>
#include <string>
#include "llvm/BinaryFormat/Dwarf.def"

Classes
struct	FwdRegParamInfo
	Represents a parameter whose call site value can be described by applying a debug expression to a register in the forwarded register worklist. More...

struct	ArangeSpan

Macros
#define	DEBUG_TYPE "dwarfdebug"

#define	HANDLE_MACRO_FLAG(ID, NAME) MACRO_FLAG_##NAME = ID,

Typedefs
using	FwdRegWorklist = MapVector< uint64_t, SmallVector< FwdRegParamInfo, 2 > >
	Register worklist for finding call site values.

using	ClobberedRegSet = SmallSet< Register, 16 >
	Container for the set of registers known to be clobbered on the path to a call site.

Enumerations
enum	DefaultOnOff { Default , Enable , Disable }

enum	LinkageNameOption { DefaultLinkageNames , AllLinkageNames , AbstractLinkageNames }

Functions
	STATISTIC (NumCSParams, "Number of dbg call site params created")

static DbgValueLoc	getDebugLocValue (const MachineInstr *MI)
	Get .debug_loc entry for the instruction range starting at MI.

static uint64_t	getFragmentOffsetInBits (const DIExpression &Expr)

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 const DIExpression *	combineDIExpressions (const DIExpression Original, const DIExpression Addition)
	Append the expression `Addition` to `Original` and return the result.

template<typename ValT >
static void	finishCallSiteParams (ValT Val, const DIExpression *Expr, ArrayRef< FwdRegParamInfo > DescribedParams, ParamSet &Params)
	Emit call site parameter entries that are described by the given value and debug expression.

static void	addToFwdRegWorklist (FwdRegWorklist &Worklist, unsigned Reg, const DIExpression *Expr, ArrayRef< FwdRegParamInfo > ParamsToAdd)
	Add `Reg` to the worklist, if it's not already present, and mark that the given parameter registers' values can (potentially) be described using that register and an debug expression.

static void	interpretValues (const MachineInstr *CurMI, FwdRegWorklist &ForwardedRegWorklist, ParamSet &Params, ClobberedRegSet &ClobberedRegUnits)
	Interpret values loaded into registers by `CurMI`.

static bool	interpretNextInstr (const MachineInstr *CurMI, FwdRegWorklist &ForwardedRegWorklist, ParamSet &Params, ClobberedRegSet &ClobberedRegUnits)

static void	collectCallSiteParameters (const MachineInstr *CallMI, ParamSet &Params)
	Try to interpret values loaded into registers that forward parameters for `CallMI`.

static SmallVectorImpl< DwarfCompileUnit::GlobalExpr > &	sortGlobalExprs (SmallVectorImpl< DwarfCompileUnit::GlobalExpr > &GVEs)
	Sort and unique GVEs by comparing their fragment offset.

static const DILocalScope *	getRetainedNodeScope (const MDNode *N)

static bool	validThroughout (LexicalScopes &LScopes, const MachineInstr DbgValue, const MachineInstr RangeEnd, const InstructionOrdering &Ordering)
	Determine whether a singular DBG_VALUE is valid for the entirety of its enclosing lexical scope.

static std::pair< const MachineInstr *, bool >	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.

static dwarf::PubIndexEntryDescriptor	computeIndexValue (DwarfUnit CU, const DIE Die)
	computeIndexValue - Compute the gdb index value for the DIE and CU.

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

static MCSymbol *	emitLoclistsTableHeader (AsmPrinter *Asm, const DwarfDebug &DD)

template<typename Ranges , typename PayloadEmitter >
static void	emitRangeList (DwarfDebug &DD, AsmPrinter Asm, MCSymbol Sym, const Ranges &R, const DwarfCompileUnit &CU, unsigned BaseAddressx, unsigned OffsetPair, unsigned StartxLength, unsigned EndOfList, StringRef(*StringifyEnum)(unsigned), bool ShouldUseBaseAddress, PayloadEmitter EmitPayload)

static void	emitLocList (DwarfDebug &DD, AsmPrinter *Asm, const DebugLocStream::List &List)

static void	emitRangeList (DwarfDebug &DD, AsmPrinter *Asm, const RangeSpanList &List)
	Emit a single range list. We handle both DWARF v5 and earlier.

static void	emitMacroHeader (AsmPrinter *Asm, const DwarfDebug &DD, const DwarfCompileUnit &CU, uint16_t DwarfVersion)
	Emit the header of a DWARF 5 macro section, or the GNU extension for DWARF 4.

Variables
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< bool >	UseGNUDebugMacro ("use-gnu-debug-macro", cl::Hidden, cl::desc("Emit the GNU .debug_macro format with DWARF <5"), cl::init(false))

static cl::opt< DefaultOnOff >	DwarfOpConvert ("dwarf-op-convert", cl::Hidden, cl::desc("Enable use of the DWARFv5 DW_OP_convert operator"), 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 cl::opt< DwarfDebug::MinimizeAddrInV5 >	MinimizeAddrInV5Option ("minimize-addr-in-v5", cl::Hidden, cl::desc("Always use DW_AT_ranges in DWARFv5 whenever it could allow more " "address pool entry sharing to reduce relocations/object size"), cl::values(clEnumValN(DwarfDebug::MinimizeAddrInV5::Default, "Default", "Default address minimization strategy"), clEnumValN(DwarfDebug::MinimizeAddrInV5::Ranges, "Ranges", "Use rnglists for contiguous ranges if that allows " "using a pre-existing base address"), clEnumValN(DwarfDebug::MinimizeAddrInV5::Expressions, "Expressions", "Use exprloc addrx+offset expressions for any " "address with a prior base address"), clEnumValN(DwarfDebug::MinimizeAddrInV5::Form, "Form", "Use addrx+offset extension form for any address " "with a prior base address"), clEnumValN(DwarfDebug::MinimizeAddrInV5::Disabled, "Disabled", "Stuff")), cl::init(DwarfDebug::MinimizeAddrInV5::Default))

static constexpr unsigned	ULEB128PadSize = 4

Macro Definition Documentation

◆ DEBUG_TYPE

#define DEBUG_TYPE "dwarfdebug"

Definition at line 65 of file DwarfDebug.cpp.

◆ HANDLE_MACRO_FLAG

#define HANDLE_MACRO_FLAG	(	ID,
		NAME
	)	MACRO_FLAG_##NAME = ID,

Typedef Documentation

◆ ClobberedRegSet

using ClobberedRegSet = SmallSet<Register, 16>

Container for the set of registers known to be clobbered on the path to a call site.

Definition at line 582 of file DwarfDebug.cpp.

◆ FwdRegWorklist

using FwdRegWorklist = MapVector<uint64_t, SmallVector<FwdRegParamInfo, 2> >

Register worklist for finding call site values.

Definition at line 579 of file DwarfDebug.cpp.

Enumeration Type Documentation

◆ DefaultOnOff

enum DefaultOnOff

Enumerator
Default
Enable
Disable

Definition at line 87 of file DwarfDebug.cpp.

◆ LinkageNameOption

enum LinkageNameOption

Enumerator
DefaultLinkageNames
AllLinkageNames
AbstractLinkageNames

Definition at line 137 of file DwarfDebug.cpp.

Function Documentation

◆ addToFwdRegWorklist()

static void addToFwdRegWorklist	(	FwdRegWorklist &	Worklist,
		unsigned	Reg,
		const DIExpression *	Expr,
		ArrayRef< FwdRegParamInfo >	ParamsToAdd
	)

static

Add Reg to the worklist, if it's not already present, and mark that the given parameter registers' values can (potentially) be described using that register and an debug expression.

Definition at line 630 of file DwarfDebug.cpp.

References assert(), combineDIExpressions(), D, and llvm::none_of().

Referenced by interpretValues().

◆ collectCallSiteParameters()

static void collectCallSiteParameters	(	const MachineInstr *	CallMI,
		ParamSet &	Params
	)

static

Try to interpret values loaded into registers that forward parameters for CallMI.

Store parameters with interpreted value into Params.

Definition at line 797 of file DwarfDebug.cpp.

References assert(), llvm::MachineFunction::begin(), llvm::MapVector< KeyT, ValueT, MapType, VectorType >::erase(), llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT, BucketT >::find(), finishCallSiteParams(), llvm::MDNode::get(), llvm::getBundleEnd(), llvm::MachineFunction::getCallSitesInfo(), llvm::Function::getContext(), llvm::MachineFunction::getFunction(), llvm::ilist_node_impl< OptionsT >::getIterator(), llvm::MachineInstr::getMF(), llvm::MachineInstr::getParent(), llvm::ilist_node_impl< OptionsT >::getReverseIterator(), llvm::MachineInstr::hasDelaySlot(), I, llvm::MapVector< KeyT, ValueT, MapType, VectorType >::insert(), interpretNextInstr(), MBB, llvm::MachineBasicBlock::rend(), and llvm::MachineInstr::uses().

◆ combineDIExpressions()

static const DIExpression * combineDIExpressions	(	const DIExpression *	Original,
		const DIExpression *	Addition
	)

static

Append the expression Addition to Original and return the result.

Definition at line 585 of file DwarfDebug.cpp.

References llvm::DIExpression::append(), llvm::erase(), llvm::DIExpression::getElements(), llvm::DIExpression::isImplicit(), and llvm::ArrayRef< T >::vec().

Referenced by addToFwdRegWorklist(), and finishCallSiteParams().

◆ computeAccelTableKind()

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

static

Definition at line 306 of file DwarfDebug.cpp.

References AccelTables, llvm::Apple, llvm::Default, llvm::Dwarf, 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 2708 of file DwarfDebug.cpp.

References llvm::DIE::findAttribute(), 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, and llvm::dwarf::isCPlusPlus().

◆ emitLocList()

static void emitLocList	(	DwarfDebug &	DD,
		AsmPrinter *	Asm,
		const DebugLocStream::List &	List
	)

static

Definition at line 3186 of file DwarfDebug.cpp.

References emitRangeList(), llvm::DwarfDebug::getDebugLocs(), llvm::DebugLocStream::getEntries(), llvm::List, and llvm::dwarf::LocListEncodingString().

◆ emitLoclistsTableHeader()

static MCSymbol * emitLoclistsTableHeader	(	AsmPrinter *	Asm,
		const DwarfDebug &	DD
	)

static

Definition at line 3061 of file DwarfDebug.cpp.

References llvm::mcdwarf::emitListsTableHeaderStart(), llvm::DwarfDebug::getDebugLocs(), and llvm::List.

◆ emitMacroHeader()

static void emitMacroHeader	(	AsmPrinter *	Asm,
		const DwarfDebug &	DD,
		const DwarfCompileUnit &	CU,
		uint16_t	DwarfVersion
	)

static

Emit the header of a DWARF 5 macro section, or the GNU extension for DWARF 4.

Definition at line 3464 of file DwarfDebug.cpp.

References llvm::DwarfDebug::useSplitDwarf().

◆ emitRangeList() [1/2]

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 3412 of file DwarfDebug.cpp.

References emitRangeList(), llvm::DwarfDebug::getDwarfVersion(), llvm::List, and llvm::dwarf::RangeListEncodingString().

◆ emitRangeList() [2/2]

template<typename Ranges , typename PayloadEmitter >

static void emitRangeList	(	DwarfDebug &	DD,
		AsmPrinter *	Asm,
		MCSymbol *	Sym,
		const Ranges &	R,
		const DwarfCompileUnit &	CU,
		unsigned	BaseAddressx,
		unsigned	OffsetPair,
		unsigned	StartxLength,
		unsigned	EndOfList,
		StringRef(*)(unsigned)	StringifyEnum,
		bool	ShouldUseBaseAddress,
		PayloadEmitter	EmitPayload
	)

static

Definition at line 3079 of file DwarfDebug.cpp.

References assert(), llvm::sampleprof::Base, End, EndOfList, llvm::DwarfDebug::getAddressPool(), llvm::DwarfDebug::getDwarfVersion(), llvm::AddressPool::getIndex(), llvm::MCSymbol::getSection(), llvm::DwarfDebug::getSectionLabel(), P, Range, Size, Sym, and llvm::DwarfDebug::tuneForGDB().

Referenced by emitLocList(), and emitRangeList().

◆ emitRnglistsTableHeader()

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

static

Definition at line 3043 of file DwarfDebug.cpp.

References llvm::mcdwarf::emitListsTableHeaderStart(), llvm::DwarfFile::getRangeLists(), llvm::DwarfFile::getRnglistsTableBaseSym(), and llvm::List.

◆ findPrologueEndLoc()

static std::pair< const MachineInstr *, bool > findPrologueEndLoc ( const MachineFunction * MF )

static

Definition at line 2148 of file DwarfDebug.cpp.

References assert(), llvm::MachineFunction::begin(), llvm::MachineFunction::end(), F, llvm::MachineInstr::FrameSetup, llvm::MachineFunction::getFunction(), llvm::TargetSubtargetInfo::getInstrInfo(), llvm::MachineInstr::getParent(), llvm::MachineFunction::getSubtarget(), isCopy(), MI, TII, and true.

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

◆ finishCallSiteParams()

template<typename ValT >

static void finishCallSiteParams	(	ValT	Val,
		const DIExpression *	Expr,
		ArrayRef< FwdRegParamInfo >	DescribedParams,
		ParamSet &	Params
	)

static

Emit call site parameter entries that are described by the given value and debug expression.

Definition at line 599 of file DwarfDebug.cpp.

References assert(), combineDIExpressions(), llvm::DIExpression::isEntryValue(), llvm::DIExpression::isValid(), and llvm::SmallVectorTemplateBase< T, bool >::push_back().

Referenced by collectCallSiteParameters(), and interpretValues().

◆ forBothCUs()

template<typename Func >

static void forBothCUs	(	DwarfCompileUnit &	CU,
		Func	F
	)

static

Definition at line 531 of file DwarfDebug.cpp.

References F.

◆ getDebugLocValue()

static DbgValueLoc getDebugLocValue ( const MachineInstr * MI )

static

Get .debug_loc entry for the instruction range starting at MI.

Definition at line 235 of file DwarfDebug.cpp.

References assert(), llvm::DIExpression::convertToNonVariadicExpression(), llvm_unreachable, MI, and llvm::SmallVectorTemplateBase< T, bool >::push_back().

◆ getFragmentOffsetInBits()

static uint64_t getFragmentOffsetInBits ( const DIExpression & Expr )

static

Definition at line 268 of file DwarfDebug.cpp.

References llvm::DIExpression::getFragmentInfo().

◆ getObjCClassCategory()

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

static

Definition at line 460 of file DwarfDebug.cpp.

References hasObjCCategory().

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

◆ getObjCMethodName()

static StringRef getObjCMethodName ( StringRef In )

static

Definition at line 472 of file DwarfDebug.cpp.

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

◆ getRetainedNodeScope()

static const DILocalScope * getRetainedNodeScope ( const MDNode * N )

static

Definition at line 1515 of file DwarfDebug.cpp.

References llvm::DIScope::getScope(), llvm_unreachable, and N.

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

◆ hasObjCCategory()

static bool hasObjCCategory ( StringRef Name )

static

Definition at line 453 of file DwarfDebug.cpp.

References isObjCClass(), and Name.

◆ interpretNextInstr()

static bool interpretNextInstr	(	const MachineInstr *	CurMI,
		FwdRegWorklist &	ForwardedRegWorklist,
		ParamSet &	Params,
		ClobberedRegSet &	ClobberedRegUnits
	)

static

Definition at line 769 of file DwarfDebug.cpp.

References llvm::MapVector< KeyT, ValueT, MapType, VectorType >::empty(), llvm::MachineInstr::getNumOperands(), interpretValues(), llvm::MachineInstr::isBundle(), and llvm::MachineInstr::isCall().

Referenced by collectCallSiteParameters().

◆ interpretValues()

static void interpretValues	(	const MachineInstr *	CurMI,
		FwdRegWorklist &	ForwardedRegWorklist,
		ParamSet &	Params,
		ClobberedRegSet &	ClobberedRegUnits
	)

static

◆ isObjCClass()

static bool isObjCClass ( StringRef Name )

static

Definition at line 449 of file DwarfDebug.cpp.

References Name.

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 2272 of file DwarfDebug.cpp.

◆ sortGlobalExprs()

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

static

Sort and unique GVEs by comparing their fragment offset.

Definition at line 1117 of file DwarfDebug.cpp.

References A, B, llvm::SmallVectorTemplateCommon< T, typename >::end(), llvm::SmallVectorImpl< T >::erase(), if(), llvm::sort(), and llvm::unique().

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

◆ STATISTIC()

STATISTIC	(	NumCSParams	,
		"Number of dbg call site params created"
	)

◆ validThroughout()

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

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 1596 of file DwarfDebug.cpp.

References llvm::all_of(), assert(), DL, llvm::LexicalScopes::findLexicalScope(), llvm::MachineInstr::FrameSetup, llvm::MachineInstr::getParent(), llvm::LexicalScope::getRanges(), MBB, llvm::MachineBasicBlock::pred_empty(), and llvm::MachineBasicBlock::rend().

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))	(	"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().

◆ 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))	(	"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

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

◆ 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))	(	"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().

◆ DwarfOpConvert

cl::opt< DefaultOnOff > DwarfOpConvert("dwarf-op-convert", cl::Hidden, cl::desc("Enable use of the DWARFv5 DW_OP_convert operator"), cl::values(clEnumVal(Default, "Default for platform"), clEnumVal(Enable, "Enabled"), clEnumVal(Disable, "Disabled")), cl::init(Default))	(	"dwarf-op-convert"	,
		cl::Hidden	,
		cl::desc("Enable use of the DWARFv5 DW_OP_convert operator")	,
		cl::values(clEnumVal(Default, "Default for platform"), clEnumVal(Enable, "Enabled"), clEnumVal(Disable, "Disabled"))	,
		cl::init(Default)
	)

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))	(	"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

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

◆ GenerateARangeSection

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

static

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

◆ GenerateDwarfTypeUnits

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

static

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

◆ MinimizeAddrInV5Option

cl::opt< DwarfDebug::MinimizeAddrInV5 > MinimizeAddrInV5Option("minimize-addr-in-v5", cl::Hidden, cl::desc("Always use DW_AT_ranges in DWARFv5 whenever it could allow more " "address pool entry sharing to reduce relocations/object size"), cl::values(clEnumValN(DwarfDebug::MinimizeAddrInV5::Default, "Default", "Default address minimization strategy"), clEnumValN(DwarfDebug::MinimizeAddrInV5::Ranges, "Ranges", "Use rnglists for contiguous ranges if that allows " "using a pre-existing base address"), clEnumValN(DwarfDebug::MinimizeAddrInV5::Expressions, "Expressions", "Use exprloc addrx+offset expressions for any " "address with a prior base address"), clEnumValN(DwarfDebug::MinimizeAddrInV5::Form, "Form", "Use addrx+offset extension form for any address " "with a prior base address"), clEnumValN(DwarfDebug::MinimizeAddrInV5::Disabled, "Disabled", "Stuff")), cl::init(DwarfDebug::MinimizeAddrInV5::Default))	(	"minimize-addr-in-v5"	,
		cl::Hidden	,
		cl::desc("Always use DW_AT_ranges in DWARFv5 whenever it could allow more " "address pool entry sharing to reduce relocations/object size")	,
		cl::values(clEnumValN(DwarfDebug::MinimizeAddrInV5::Default, "Default", "Default address minimization strategy"), clEnumValN(DwarfDebug::MinimizeAddrInV5::Ranges, "Ranges", "Use rnglists for contiguous ranges if that allows " "using a pre-existing base address"), clEnumValN(DwarfDebug::MinimizeAddrInV5::Expressions, "Expressions", "Use exprloc addrx+offset expressions for any " "address with a prior base address"), clEnumValN(DwarfDebug::MinimizeAddrInV5::Form, "Form", "Use addrx+offset extension form for any address " "with a prior base address"), clEnumValN(DwarfDebug::MinimizeAddrInV5::Disabled, "Disabled", "Stuff"))	,
		cl::init(DwarfDebug::MinimizeAddrInV5::Default)
	)

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))	(	"no-dwarf-ranges-section"	,
		cl::Hidden	,
		cl::desc("Disable emission .debug_ranges section.")	,
		cl::init(false)
	)

static

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

◆ SplitDwarfCrossCuReferences

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

◆ ULEB128PadSize

constexpr unsigned ULEB128PadSize = 4

staticconstexpr

Definition at line 173 of file DwarfDebug.cpp.

Referenced by llvm::APByteStreamer::emitDIERef(), and llvm::BufferByteStreamer::emitDIERef().

◆ 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))	(	"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

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

◆ 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))	(	"use-dwarf-ranges-base-address-specifier"	,
		cl::Hidden	,
		cl::desc("Use base address specifiers in debug_ranges")	,
		cl::init(false)
	)

static

◆ UseGNUDebugMacro

cl::opt< bool > UseGNUDebugMacro("use-gnu-debug-macro", cl::Hidden, cl::desc("Emit the GNU .debug_macro format with DWARF <5"), cl::init(false))	(	"use-gnu-debug-macro"	,
		cl::Hidden	,
		cl::desc("Emit the GNU .debug_macro format with DWARF <5")	,
		cl::init(false)
	)

static

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

Classes

Macros

Typedefs

Enumerations

Functions

Variables

Macro Definition Documentation

◆ DEBUG_TYPE

◆ HANDLE_MACRO_FLAG

Typedef Documentation

◆ ClobberedRegSet

◆ FwdRegWorklist

Enumeration Type Documentation

◆ DefaultOnOff

◆ LinkageNameOption

Function Documentation

◆ addToFwdRegWorklist()

◆ collectCallSiteParameters()

◆ combineDIExpressions()

◆ computeAccelTableKind()

◆ computeIndexValue()

◆ emitLocList()

◆ emitLoclistsTableHeader()

◆ emitMacroHeader()

◆ emitRangeList() [1/2]

◆ emitRangeList() [2/2]

◆ emitRnglistsTableHeader()

◆ findPrologueEndLoc()

◆ finishCallSiteParams()

◆ forBothCUs()

◆ getDebugLocValue()

◆ getFragmentOffsetInBits()

◆ getObjCClassCategory()

◆ getObjCMethodName()

◆ getRetainedNodeScope()

◆ hasObjCCategory()

◆ interpretNextInstr()

◆ interpretValues()

◆ isObjCClass()

◆ recordSourceLine()

◆ sortGlobalExprs()

◆ STATISTIC()

◆ validThroughout()

Variable Documentation

◆ AccelTables

◆ DwarfInlinedStrings

◆ DwarfLinkageNames

◆ DwarfOpConvert

◆ DwarfSectionsAsReferences

◆ GenerateARangeSection

◆ GenerateDwarfTypeUnits

◆ MinimizeAddrInV5Option

◆ NoDwarfRangesSection

◆ SplitDwarfCrossCuReferences

◆ ULEB128PadSize

◆ UnknownLocations

◆ UseDwarfRangesBaseAddressSpecifier

◆ UseGNUDebugMacro