LLVM  8.0.1
Classes | Namespaces | Functions
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/Optional.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/MC/StringTableBuilder.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 <string>
#include <utility>
#include <vector>
Include dependency graph for MCDwarf.cpp:

Go to the source code of this file.

Classes

class  llvm::MCDwarfLineStr
 Manage the .debug_line_str section contents, if we use it. More...
 
struct  llvm::DenseMapInfo< CIEKey >
 

Namespaces

 llvm
 This class represents lattice values for constants.
 

Functions

static uint64_t ScaleAddrDelta (MCContext &Context, uint64_t AddrDelta)
 
static const MCExpr * MakeStartMinusEndExpr (const MCStreamer &MCOS, const MCSymbol &Start, const MCSymbol &End, int IntVal)
 
static const MCExpr * makeStartPlusIntExpr (MCContext &Ctx, const MCSymbol &Start, int IntVal)
 
static void EmitDwarfLineTable (MCObjectStreamer *MCOS, MCSection *Section, const MCLineSection::MCDwarfLineEntryCollection &LineEntries)
 
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 HasSource, Optional< MCDwarfLineStr > &LineStr)
 
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). More...
 
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 *RangesSectionSymbol)
 
static void 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 783 of file MCDwarf.cpp.

References llvm::MCStreamer::EmitULEB128IntValue().

Referenced by EmitGenDwarfAbbrev().

◆ emitAbsValue()

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

Definition at line 306 of file MCDwarf.cpp.

References llvm::ISD::ABS, llvm::MCStreamer::EmitValue(), and forceExpAbs().

Referenced by llvm::MCDwarfLineTableHeader::Emit(), emitEncodingByte(), emitFDESymbol(), EmitGenDwarfAranges(), EmitGenDwarfInfo(), EmitGenDwarfRanges(), and getCIEVersion().

◆ EmitDwarfLineTable()

static void EmitDwarfLineTable ( MCObjectStreamer *  MCOS,
MCSection *  Section,
const MCLineSection::MCDwarfLineEntryCollection &  LineEntries 
)
inlinestatic

Definition at line 151 of file MCDwarf.cpp.

References DWARF2_FLAG_BASIC_BLOCK, DWARF2_FLAG_EPILOGUE_BEGIN, DWARF2_FLAG_IS_STMT, DWARF2_FLAG_PROLOGUE_END, DWARF2_LINE_DEFAULT_IS_STMT, llvm::MCObjectStreamer::EmitDwarfAdvanceLineAddr(), llvm::MCStreamer::EmitIntValue(), llvm::MCStreamer::EmitULEB128IntValue(), llvm::MCStreamer::endSection(), llvm::MCContext::getAsmInfo(), llvm::MCAsmInfo::getCodePointerSize(), llvm::MCStreamer::getContext(), llvm::MCObjectFileInfo::getDwarfLineSection(), llvm::MCContext::getDwarfVersion(), llvm::MCContext::getObjectFileInfo(), llvm::getULEB128Size(), INT64_MAX, Size, and llvm::MCStreamer::SwitchSection().

Referenced by llvm::MCDwarfLineTable::EmitCU().

◆ emitEncodingByte()

static void emitEncodingByte ( MCObjectStreamer &  Streamer,
unsigned  Encoding 
)
static

Definition at line 1310 of file MCDwarf.cpp.

References llvm::MCDwarfFrameInfo::Begin, llvm::MCDwarfFrameInfo::CompactUnwindEncoding, Context, llvm::dwarf::DW_EH_PE_absptr, llvm::dwarf::DW_EH_PE_udata4, emitAbsValue(), llvm::MCStreamer::EmitIntValue(), llvm::MCDwarfFrameInfo::End, llvm::MCObjectFileInfo::getCompactUnwindDwarfEHFrameOnly(), getDataAlignmentFactor(), llvm::MCObjectFileInfo::getFDEEncoding(), llvm::MCCFIInstruction::getLabel(), llvm::MCContext::getObjectFileInfo(), llvm::MCCFIInstruction::getOffset(), llvm::MCCFIInstruction::getOperation(), llvm::MCCFIInstruction::getRegister(), llvm::MCCFIInstruction::getRegister2(), getSizeForEncoding(), llvm::MCCFIInstruction::getValues(), llvm::MCSymbol::isDefined(), llvm_unreachable, llvm::MCDwarfFrameInfo::Lsda, llvm::MCDwarfFrameInfo::LsdaEncoding, MakeStartMinusEndExpr(), MRI, llvm::MCCFIInstruction::OpAdjustCfaOffset, llvm::MCCFIInstruction::OpDefCfa, llvm::MCCFIInstruction::OpDefCfaOffset, llvm::MCCFIInstruction::OpDefCfaRegister, llvm::MCCFIInstruction::OpEscape, llvm::MCCFIInstruction::OpGnuArgsSize, llvm::MCCFIInstruction::OpNegateRAState, llvm::MCCFIInstruction::OpOffset, llvm::MCCFIInstruction::OpRegister, llvm::MCCFIInstruction::OpRelOffset, llvm::MCCFIInstruction::OpRememberState, llvm::MCCFIInstruction::OpRestore, llvm::MCCFIInstruction::OpRestoreState, llvm::MCCFIInstruction::OpSameValue, llvm::MCCFIInstruction::OpUndefined, llvm::MCCFIInstruction::OpWindowSave, llvm::MCDwarfFrameInfo::Personality, Reg, and Size.

Referenced by getCIEVersion().

◆ emitFDESymbol()

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

Definition at line 1260 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().

Referenced by getCIEVersion().

◆ EmitGenDwarfAbbrev()

static void EmitGenDwarfAbbrev ( MCStreamer *  MCOS)
static

Definition at line 790 of file MCDwarf.cpp.

References llvm::dwarf::DW_CHILDREN_no, llvm::dwarf::DW_CHILDREN_yes, EmitAbbrev(), llvm::MCStreamer::EmitIntValue(), llvm::MCStreamer::EmitULEB128IntValue(), llvm::StringRef::empty(), llvm::MCContext::getCompilationDir(), llvm::MCStreamer::getContext(), llvm::MCObjectFileInfo::getDwarfAbbrevSection(), llvm::MCContext::getDwarfDebugFlags(), 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 845 of file MCDwarf.cpp.

References assert(), llvm::MCSymbolRefExpr::create(), emitAbsValue(), llvm::MCStreamer::EmitIntValue(), llvm::MCStreamer::EmitSymbolValue(), llvm::MCStreamer::EmitValue(), llvm::MCContext::getAsmInfo(), llvm::MCAsmInfo::getCodePointerSize(), llvm::MCStreamer::getContext(), llvm::MCObjectFileInfo::getDwarfARangesSection(), llvm::MCContext::getGenDwarfSectionSyms(), llvm::MCContext::getObjectFileInfo(), MakeStartMinusEndExpr(), 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 *  RangesSectionSymbol 
)
static

Definition at line 916 of file MCDwarf.cpp.

References assert(), llvm::MCContext::createTempSymbol(), emitAbsValue(), llvm::MCStreamer::EmitIntValue(), llvm::MCStreamer::EmitLabel(), llvm::MCStreamer::EmitSymbolValue(), llvm::MCStreamer::EmitULEB128IntValue(), llvm::MCContext::getAsmInfo(), llvm::MCAsmInfo::getCodePointerSize(), llvm::MCStreamer::getContext(), llvm::MCObjectFileInfo::getDwarfInfoSection(), llvm::MCContext::getDwarfVersion(), llvm::MCContext::getGenDwarfSectionSyms(), llvm::MCContext::getObjectFileInfo(), MakeStartMinusEndExpr(), llvm::MCAsmInfo::needsDwarfSectionOffsetDirective(), and llvm::MCStreamer::SwitchSection().

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

◆ EmitGenDwarfRanges()

static void EmitGenDwarfRanges ( MCStreamer *  MCOS)
static

Definition at line 1084 of file MCDwarf.cpp.

References assert(), llvm::MCSymbolRefExpr::create(), emitAbsValue(), llvm::MCStreamer::emitFill(), llvm::MCStreamer::EmitIntValue(), llvm::MCStreamer::EmitValue(), llvm::MCContext::getAsmInfo(), llvm::MCAsmInfo::getCodePointerSize(), llvm::MCStreamer::getContext(), llvm::MCObjectFileInfo::getDwarfRangesSection(), llvm::MCContext::getGenDwarfSectionSyms(), llvm::MCContext::getObjectFileInfo(), MakeStartMinusEndExpr(), llvm::COFF::SectionSize, 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  HasSource,
Optional< MCDwarfLineStr > &  LineStr 
)
static

Definition at line 353 of file MCDwarf.cpp.

References assert(), llvm::MD5::MD5Result::Bytes, llvm::MCDwarfFile::Checksum, llvm::MCDwarfFile::DirIndex, llvm::MCStreamer::EmitBinaryData(), llvm::MCStreamer::EmitBytes(), llvm::MCStreamer::EmitIntValue(), llvm::MCDwarfLineStr::emitRef(), llvm::MCStreamer::EmitULEB128IntValue(), llvm::StringRef::empty(), llvm::MCDwarfFile::Name, and llvm::MCDwarfFile::Source.

◆ EmitPersonality()

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

Definition at line 1274 of file MCDwarf.cpp.

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

Referenced by getCIEVersion().

◆ forceExpAbs()

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

Definition at line 295 of file MCDwarf.cpp.

References llvm::ISD::ABS, assert(), Context, llvm::MCSymbolRefExpr::create(), llvm::MCContext::createTempSymbol(), llvm::MCStreamer::EmitAssignment(), llvm::MCContext::getAsmInfo(), llvm::MCStreamer::getContext(), and llvm::MCAsmInfo::hasAggressiveSymbolFolding().

Referenced by emitAbsValue().

◆ getCIEVersion()

static unsigned getCIEVersion ( bool  IsEH,
unsigned  DwarfVersion 
)
static

Definition at line 1530 of file MCDwarf.cpp.

References llvm::AMDGPU::HSAMD::Kernel::Arg::Key::Align, assert(), llvm::MCDwarfFrameInfo::Begin, llvm::MCContext::createTempSymbol(), llvm::MCAsmInfo::doesDwarfUseRelocationsAcrossSections(), llvm::dwarf::DW_EH_PE_absptr, emitAbsValue(), emitEncodingByte(), emitFDESymbol(), EmitPersonality(), llvm::MCDwarfFrameInfo::End, llvm::MCContext::getAsmInfo(), llvm::MCAsmInfo::getCodePointerSize(), getDataAlignmentFactor(), llvm::MCRegisterInfo::getDwarfRegNum(), llvm::MCContext::getDwarfVersion(), llvm::MCObjectFileInfo::getFDEEncoding(), llvm::MCAsmInfo::getInitialFrameState(), llvm::MCAsmInfo::getMinInstAlignment(), llvm::MCContext::getObjectFileInfo(), llvm::MCRegisterInfo::getRARegister(), llvm::MCContext::getRegisterInfo(), getSizeForEncoding(), llvm::MCDwarfFrameInfo::Instructions, llvm::MCDwarfFrameInfo::IsBKeyFrame, llvm::MCDwarfFrameInfo::IsSignalFrame, llvm::MCDwarfFrameInfo::IsSimple, llvm_unreachable, llvm::MCDwarfFrameInfo::Lsda, llvm::MCDwarfFrameInfo::LsdaEncoding, MakeStartMinusEndExpr(), MRI, llvm::MCDwarfFrameInfo::Personality, llvm::MCDwarfFrameInfo::PersonalityEncoding, and llvm::MCDwarfFrameInfo::RAReg.

◆ getDataAlignmentFactor()

static int getDataAlignmentFactor ( MCStreamer &  streamer)
static

Definition at line 1229 of file MCDwarf.cpp.

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

Referenced by emitEncodingByte(), and getCIEVersion().

◆ getSizeForEncoding()

static unsigned getSizeForEncoding ( MCStreamer &  streamer,
unsigned  symbolEncoding 
)
static

Definition at line 1239 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 emitEncodingByte(), emitFDESymbol(), EmitPersonality(), and getCIEVersion().

◆ MakeStartMinusEndExpr()

static const MCExpr* MakeStartMinusEndExpr ( const MCStreamer &  MCOS,
const MCSymbol &  Start,
const MCSymbol &  End,
int  IntVal 
)
inlinestatic

Definition at line 116 of file MCDwarf.cpp.

Referenced by llvm::MCDwarfLineTableHeader::Emit(), emitEncodingByte(), EmitGenDwarfAranges(), EmitGenDwarfInfo(), EmitGenDwarfRanges(), and getCIEVersion().

◆ makeStartPlusIntExpr()

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

Definition at line 138 of file MCDwarf.cpp.

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

◆ ScaleAddrDelta()

static uint64_t ScaleAddrDelta ( MCContext &  Context,
uint64_t  AddrDelta 
)
inlinestatic

Definition at line 72 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 644 of file MCDwarf.cpp.

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

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

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