MCDwarf.cpp File Reference

#include "llvm/MC/MCDwarf.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/Twine.h"
#include "llvm/BinaryFormat/Dwarf.h"
#include "llvm/Config/config.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCObjectFileInfo.h"
#include "llvm/MC/MCObjectStreamer.h"
#include "llvm/MC/MCRegisterInfo.h"
#include "llvm/MC/MCSection.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/EndianStream.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/LEB128.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Support/raw_ostream.h"
#include <cassert>
#include <cstdint>
#include <optional>
#include <string>
#include <utility>
#include <vector>

Go to the source code of this file.

Functions
static uint64_t	ScaleAddrDelta (MCContext &Context, uint64_t AddrDelta)
static const MCExpr *	makeEndMinusStartExpr (MCContext &Ctx, const MCSymbol &Start, const MCSymbol &End, int IntVal)
static const MCExpr *	makeStartPlusIntExpr (MCContext &Ctx, const MCSymbol &Start, int IntVal)
static const MCExpr *	forceExpAbs (MCStreamer &OS, const MCExpr *Expr)
static void	emitAbsValue (MCStreamer &OS, const MCExpr *Value, unsigned Size)
static void	emitOneV5FileEntry (MCStreamer *MCOS, const MCDwarfFile &DwarfFile, bool EmitMD5, bool HasAnySource, std::optional< MCDwarfLineStr > &LineStr)
static bool	isRootFile (const MCDwarfFile &RootFile, StringRef &Directory, StringRef &FileName, std::optional< MD5::MD5Result > Checksum)
static uint64_t	SpecialAddr (MCDwarfLineTableParams Params, uint64_t op)
	Given a special op, return the address skip amount (in units of DWARF2_LINE_MIN_INSN_LENGTH).
static void	EmitAbbrev (MCStreamer *MCOS, uint64_t Name, uint64_t Form)
static void	EmitGenDwarfAbbrev (MCStreamer *MCOS)
static void	EmitGenDwarfAranges (MCStreamer *MCOS, const MCSymbol *InfoSectionSymbol)
static void	EmitGenDwarfInfo (MCStreamer *MCOS, const MCSymbol *AbbrevSectionSymbol, const MCSymbol *LineSectionSymbol, const MCSymbol *RangesSymbol)
static MCSymbol *	emitGenDwarfRanges (MCStreamer *MCOS)
static int	getDataAlignmentFactor (MCStreamer &streamer)
static unsigned	getSizeForEncoding (MCStreamer &streamer, unsigned symbolEncoding)
static void	emitFDESymbol (MCObjectStreamer &streamer, const MCSymbol &symbol, unsigned symbolEncoding, bool isEH)
static void	EmitPersonality (MCStreamer &streamer, const MCSymbol &symbol, unsigned symbolEncoding)
static void	emitEncodingByte (MCObjectStreamer &Streamer, unsigned Encoding)
static unsigned	getCIEVersion (bool IsEH, unsigned DwarfVersion)

Function Documentation

EmitAbbrev()

void EmitAbbrev ( MCStreamer * MCOS, uint64_t Name, uint64_t Form )

static

Definition at line 829 of file MCDwarf.cpp.

References llvm::MCStreamer::emitULEB128IntValue().

Referenced by EmitGenDwarfAbbrev().

emitAbsValue()

void emitAbsValue ( MCStreamer & OS, const MCExpr * Value, unsigned Size )

static

Definition at line 380 of file MCDwarf.cpp.

References llvm::MCStreamer::emitValue(), forceExpAbs(), and Size.

Referenced by emitFDESymbol(), EmitGenDwarfAranges(), EmitGenDwarfInfo(), and emitGenDwarfRanges().

emitEncodingByte()

void emitEncodingByte ( MCObjectStreamer & Streamer, unsigned Encoding )

static

Definition at line 1376 of file MCDwarf.cpp.

References llvm::MCStreamer::emitInt8().

emitFDESymbol()

void emitFDESymbol ( MCObjectStreamer & streamer, const MCSymbol & symbol, unsigned symbolEncoding, bool isEH )

static

Definition at line 1326 of file MCDwarf.cpp.

References llvm::MCAsmInfo::doDwarfFDESymbolsUseAbsDiff(), emitAbsValue(), llvm::MCStreamer::emitValue(), llvm::MCContext::getAsmInfo(), llvm::MCStreamer::getContext(), llvm::MCAsmInfo::getExprForFDESymbol(), getSizeForEncoding(), and llvm::size().

EmitGenDwarfAbbrev()

void EmitGenDwarfAbbrev ( MCStreamer * MCOS )

static

Definition at line 836 of file MCDwarf.cpp.

References llvm::dwarf::DW_CHILDREN_no, llvm::dwarf::DW_CHILDREN_yes, llvm::dwarf::DWARF64, EmitAbbrev(), llvm::MCStreamer::emitInt8(), llvm::MCStreamer::emitULEB128IntValue(), llvm::StringRef::empty(), llvm::MCContext::getCompilationDir(), llvm::MCStreamer::getContext(), llvm::MCObjectFileInfo::getDwarfAbbrevSection(), llvm::MCContext::getDwarfDebugFlags(), llvm::MCContext::getDwarfFormat(), llvm::MCContext::getDwarfVersion(), llvm::MCContext::getGenDwarfSectionSyms(), llvm::MCContext::getObjectFileInfo(), and llvm::MCStreamer::switchSection().

Referenced by llvm::MCGenDwarfInfo::Emit().

EmitGenDwarfAranges()

void EmitGenDwarfAranges ( MCStreamer * MCOS, const MCSymbol * InfoSectionSymbol )

static

Definition at line 885 of file MCDwarf.cpp.

References assert(), llvm::MCSymbolRefExpr::create(), llvm::dwarf::DW_LENGTH_DWARF64, llvm::dwarf::DWARF64, emitAbsValue(), llvm::MCStreamer::emitInt16(), llvm::MCStreamer::emitInt32(), llvm::MCStreamer::emitInt8(), llvm::MCStreamer::emitIntValue(), llvm::MCStreamer::emitSymbolValue(), llvm::MCStreamer::emitValue(), llvm::MCContext::getAsmInfo(), llvm::MCAsmInfo::getCodePointerSize(), llvm::MCStreamer::getContext(), llvm::MCObjectFileInfo::getDwarfARangesSection(), llvm::MCContext::getDwarfFormat(), llvm::dwarf::getDwarfOffsetByteSize(), llvm::MCContext::getGenDwarfSectionSyms(), llvm::MCContext::getObjectFileInfo(), llvm::dwarf::getUnitLengthFieldByteSize(), llvm::Length, makeEndMinusStartExpr(), llvm::MCAsmInfo::needsDwarfSectionOffsetDirective(), Size, and llvm::MCStreamer::switchSection().

Referenced by llvm::MCGenDwarfInfo::Emit().

EmitGenDwarfInfo()

void EmitGenDwarfInfo ( MCStreamer * MCOS, const MCSymbol * AbbrevSectionSymbol, const MCSymbol * LineSectionSymbol, const MCSymbol * RangesSymbol )

static

Definition at line 963 of file MCDwarf.cpp.

References assert(), llvm::MCSymbolRefExpr::create(), llvm::MCContext::createTempSymbol(), llvm::dwarf::DW_LENGTH_DWARF64, llvm::dwarf::DWARF64, emitAbsValue(), llvm::MCStreamer::emitBytes(), llvm::MCStreamer::emitInt16(), llvm::MCStreamer::emitInt32(), llvm::MCStreamer::emitInt8(), llvm::MCStreamer::emitIntValue(), llvm::MCStreamer::emitLabel(), llvm::MCStreamer::emitSymbolValue(), llvm::MCStreamer::emitULEB128IntValue(), llvm::MCStreamer::emitValue(), llvm::SmallVectorTemplateCommon< T, typename >::empty(), llvm::StringRef::empty(), llvm::sys::path::get_separator(), llvm::MCContext::getAsmInfo(), llvm::MCAsmInfo::getCodePointerSize(), llvm::MCContext::getCompilationDir(), llvm::MCStreamer::getContext(), llvm::MCContext::getDwarfDebugFlags(), llvm::MCContext::getDwarfDebugProducer(), llvm::MCContext::getDwarfFormat(), llvm::MCObjectFileInfo::getDwarfInfoSection(), llvm::dwarf::getDwarfOffsetByteSize(), llvm::MCContext::getDwarfVersion(), llvm::MCContext::getGenDwarfSectionSyms(), llvm::MCContext::getMCDwarfDirs(), llvm::MCContext::getMCDwarfFiles(), llvm::MCContext::getMCDwarfLineTable(), llvm::MCContext::getMCGenDwarfLabelEntries(), llvm::MCContext::getObjectFileInfo(), llvm::MCDwarfLineTable::getRootFile(), llvm::dwarf::getUnitLengthFieldByteSize(), llvm::Length, makeEndMinusStartExpr(), llvm::MCDwarfFile::Name, llvm::MCAsmInfo::needsDwarfSectionOffsetDirective(), llvm::SmallVectorTemplateCommon< T, typename >::size(), and llvm::MCStreamer::switchSection().

Referenced by llvm::MCGenDwarfInfo::Emit().

emitGenDwarfRanges()

MCSymbol * emitGenDwarfRanges ( MCStreamer * MCOS )

static

Definition at line 1134 of file MCDwarf.cpp.

References llvm::MCStreamer::AddComment(), llvm::MCSymbolRefExpr::create(), llvm::MCContext::createTempSymbol(), emitAbsValue(), llvm::MCStreamer::emitFill(), llvm::MCStreamer::emitInt32(), llvm::MCStreamer::emitInt8(), llvm::MCStreamer::emitIntValue(), llvm::MCStreamer::emitLabel(), llvm::mcdwarf::emitListsTableHeaderStart(), llvm::MCStreamer::emitULEB128Value(), llvm::MCStreamer::emitValue(), llvm::MCContext::getAsmInfo(), llvm::MCAsmInfo::getCodePointerSize(), llvm::MCStreamer::getContext(), llvm::MCObjectFileInfo::getDwarfRangesSection(), llvm::MCObjectFileInfo::getDwarfRnglistsSection(), llvm::MCContext::getDwarfVersion(), llvm::MCContext::getGenDwarfSectionSyms(), llvm::MCContext::getObjectFileInfo(), makeEndMinusStartExpr(), and llvm::MCStreamer::switchSection().

Referenced by llvm::MCGenDwarfInfo::Emit().

emitOneV5FileEntry()

void emitOneV5FileEntry ( MCStreamer * MCOS, const MCDwarfFile & DwarfFile, bool EmitMD5, bool HasAnySource, std::optional< MCDwarfLineStr > & LineStr )

static

Definition at line 443 of file MCDwarf.cpp.

References assert(), llvm::MCStreamer::emitBinaryData(), llvm::MCStreamer::emitBytes(), and llvm::MCStreamer::emitULEB128IntValue().

EmitPersonality()

void EmitPersonality ( MCStreamer & streamer, const MCSymbol & symbol, unsigned symbolEncoding )

static

Definition at line 1340 of file MCDwarf.cpp.

References llvm::MCStreamer::emitValue(), llvm::MCContext::getAsmInfo(), llvm::MCStreamer::getContext(), llvm::MCAsmInfo::getExprForPersonalitySymbol(), getSizeForEncoding(), and llvm::size().

forceExpAbs()

const MCExpr * forceExpAbs ( MCStreamer & OS, const MCExpr * Expr )

static

Definition at line 368 of file MCDwarf.cpp.

References assert(), llvm::MCSymbolRefExpr::create(), llvm::MCStreamer::emitAssignment(), llvm::MCStreamer::getContext(), and llvm::isa().

Referenced by emitAbsValue().

getCIEVersion()

unsigned getCIEVersion ( bool IsEH, unsigned DwarfVersion )

static

Definition at line 1635 of file MCDwarf.cpp.

References llvm_unreachable.

getDataAlignmentFactor()

int getDataAlignmentFactor ( MCStreamer & streamer )

static

Definition at line 1295 of file MCDwarf.cpp.

References llvm::MCContext::getAsmInfo(), llvm::MCAsmInfo::getCalleeSaveStackSlotSize(), llvm::MCStreamer::getContext(), llvm::MCAsmInfo::isStackGrowthDirectionUp(), and llvm::size().

Referenced by llvm::dwarf::FDE::FDE().

getSizeForEncoding()

unsigned getSizeForEncoding ( MCStreamer & streamer, unsigned symbolEncoding )

static

Definition at line 1305 of file MCDwarf.cpp.

References llvm::dwarf::DW_EH_PE_absptr, llvm::dwarf::DW_EH_PE_sdata2, llvm::dwarf::DW_EH_PE_sdata4, llvm::dwarf::DW_EH_PE_sdata8, llvm::dwarf::DW_EH_PE_signed, llvm::dwarf::DW_EH_PE_udata2, llvm::dwarf::DW_EH_PE_udata4, llvm::dwarf::DW_EH_PE_udata8, llvm::format(), llvm::MCContext::getAsmInfo(), llvm::MCAsmInfo::getCodePointerSize(), llvm::MCStreamer::getContext(), and llvm_unreachable.

Referenced by emitFDESymbol(), and EmitPersonality().

isRootFile()

bool isRootFile ( const MCDwarfFile & RootFile, StringRef & Directory, StringRef & FileName, std::optional< MD5::MD5Result > Checksum )

static

Definition at line 639 of file MCDwarf.cpp.

References llvm::MCDwarfFile::Checksum, and llvm::MCDwarfFile::Name.

Referenced by llvm::MCDwarfLineTableHeader::tryGetFile().

makeEndMinusStartExpr()

const MCExpr * makeEndMinusStartExpr ( MCContext & Ctx, const MCSymbol & Start, const MCSymbol & End, int IntVal )

inlinestatic

Definition at line 119 of file MCDwarf.cpp.

References llvm::MCBinaryExpr::create(), llvm::MCConstantExpr::create(), llvm::MCSymbolRefExpr::create(), RHS, and llvm::MCBinaryExpr::Sub.

Referenced by EmitGenDwarfAranges(), EmitGenDwarfInfo(), and emitGenDwarfRanges().

makeStartPlusIntExpr()

const MCExpr * makeStartPlusIntExpr ( MCContext & Ctx, const MCSymbol & Start, int IntVal )

inlinestatic

Definition at line 135 of file MCDwarf.cpp.

References llvm::MCBinaryExpr::Add, llvm::MCBinaryExpr::create(), llvm::MCConstantExpr::create(), llvm::MCSymbolRefExpr::create(), LHS, and RHS.

Referenced by llvm::MCDwarfLineStr::emitRef().

ScaleAddrDelta()

uint64_t ScaleAddrDelta ( MCContext & Context, uint64_t AddrDelta )

inlinestatic

Definition at line 65 of file MCDwarf.cpp.

Referenced by llvm::MCDwarfLineAddr::encode(), and llvm::MCDwarfFrameEmitter::encodeAdvanceLoc().

SpecialAddr()

uint64_t SpecialAddr ( MCDwarfLineTableParams Params, uint64_t op )

static

Given a special op, return the address skip amount (in units of DWARF2_LINE_MIN_INSN_LENGTH).

Definition at line 740 of file MCDwarf.cpp.

References llvm::MCDwarfLineTableParams::DWARF2LineOpcodeBase, llvm::MCDwarfLineTableParams::DWARF2LineRange, and op.

Referenced by llvm::MCDwarfLineAddr::encode().