MCDwarf.cpp File Reference

#include "llvm/MC/MCDwarf.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/Hashing.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/ScopeExit.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/Endian.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()

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

static

Definition at line 774 of file MCDwarf.cpp.

References llvm::MCStreamer::emitULEB128IntValue(), and Name.

Referenced by EmitGenDwarfAbbrev().

emitAbsValue()

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

static

Definition at line 332 of file MCDwarf.cpp.

References forceExpAbs(), OS, and Size.

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

emitEncodingByte()

static void emitEncodingByte ( MCObjectStreamer &  Streamer, unsigned  Encoding  )

static

Definition at line 1325 of file MCDwarf.cpp.

References llvm::MCStreamer::emitInt8().

emitFDESymbol()

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

static

Definition at line 1275 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()

static void EmitGenDwarfAbbrev ( MCStreamer *  MCOS )

static

Definition at line 781 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()

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

static

Definition at line 830 of file MCDwarf.cpp.

References Addr, 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, llvm::MCStreamer::switchSection(), and llvm::MCSymbolRefExpr::VK_None.

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

EmitGenDwarfInfo()

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

static

Definition at line 909 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::SmallVectorBase< Size_T >::empty(), llvm::StringRef::empty(), End, 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::SmallVectorBase< Size_T >::size(), llvm::MCStreamer::switchSection(), and llvm::MCSymbolRefExpr::VK_None.

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

emitGenDwarfRanges()

static MCSymbol * emitGenDwarfRanges ( MCStreamer *  MCOS )

static

Definition at line 1083 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(), llvm::MCStreamer::switchSection(), and llvm::MCSymbolRefExpr::VK_None.

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

emitOneV5FileEntry()

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

static

Definition at line 395 of file MCDwarf.cpp.

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

EmitPersonality()

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

static

Definition at line 1289 of file MCDwarf.cpp.

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

forceExpAbs()

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

static

Definition at line 320 of file MCDwarf.cpp.

References assert(), llvm::MCSymbolRefExpr::create(), llvm::MCContext::createTempSymbol(), llvm::MCAsmInfo::doesSetDirectiveSuppressReloc(), llvm::MCContext::getAsmInfo(), and OS.

Referenced by emitAbsValue().

getCIEVersion()

static unsigned getCIEVersion ( bool  IsEH, unsigned  DwarfVersion  )

static

Definition at line 1561 of file MCDwarf.cpp.

References llvm_unreachable.

getDataAlignmentFactor()

static int getDataAlignmentFactor ( MCStreamer &  streamer )

static

Definition at line 1244 of file MCDwarf.cpp.

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

getSizeForEncoding()

static unsigned getSizeForEncoding ( MCStreamer &  streamer, unsigned  symbolEncoding  )

static

Definition at line 1254 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()

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

static

Definition at line 584 of file MCDwarf.cpp.

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

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

makeEndMinusStartExpr()

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

inlinestatic

Definition at line 123 of file MCDwarf.cpp.

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

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

makeStartPlusIntExpr()

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

inlinestatic

Definition at line 140 of file MCDwarf.cpp.

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

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

ScaleAddrDelta()

static uint64_t ScaleAddrDelta ( MCContext &  Context, uint64_t  AddrDelta  )

inlinestatic

Definition at line 69 of file MCDwarf.cpp.

References llvm::MCContext::getAsmInfo(), and llvm::MCAsmInfo::getMinInstAlignment().

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

SpecialAddr()

static 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 685 of file MCDwarf.cpp.

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

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