llvm::DWARFContext Class Reference

DWARFContext This data structure is the top level entity that deals with dwarf debug information parsing. More...

#include "llvm/DebugInfo/DWARF/DWARFContext.h"

Inheritance diagram for llvm::DWARFContext:

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Classes

struct DIEsForAddress

Wraps the returned DIEs for a given address. More...

class DWARFContextState

DWARFContextState This structure contains all member variables for DWARFContext that need to be protected in multi-threaded environments. More...

Public Types

enum class ProcessDebugRelocations { Process , Ignore }

using unit_iterator_range = DWARFUnitVector::iterator_range

using compile_unit_range = DWARFUnitVector::compile_unit_range

Public Types inherited from llvm::DIContext

enum DIContextKind { CK_DWARF , CK_PDB , CK_BTF , CK_GSYM }

Public Member Functions

DWARFContext (std::unique_ptr< const DWARFObject > DObj, std::string DWPName="", std::function< void(Error)> RecoverableErrorHandler=WithColor::defaultErrorHandler, std::function< void(Error)> WarningHandler=WithColor::defaultWarningHandler, bool ThreadSafe=false)

~DWARFContext () override

DWARFContext (DWARFContext &)=delete

DWARFContext & operator= (DWARFContext &)=delete

const DWARFObject & getDWARFObj () const

void dump (raw_ostream &OS, DIDumpOptions DumpOpts, std::array< std::optional< uint64_t >, DIDT_ID_Count > DumpOffsets)

Dump a textual representation to OS.

void dump (raw_ostream &OS, DIDumpOptions DumpOpts) override

bool verify (raw_ostream &OS, DIDumpOptions DumpOpts={}) override

unit_iterator_range info_section_units ()

Get units from .debug_info in this context.

const DWARFUnitVector & getNormalUnitsVector ()

unit_iterator_range types_section_units ()

Get units from .debug_types in this context.

compile_unit_range compile_units ()

Get compile units in this context.

unit_iterator_range normal_units ()

Get all normal compile/type units in this context.

unit_iterator_range dwo_info_section_units ()

Get units from .debug_info..dwo in the DWO context.

const DWARFUnitVector & getDWOUnitsVector ()

bool isDWP () const

Return true of this DWARF context is a DWP file.

unit_iterator_range dwo_types_section_units ()

Get units from .debug_types.dwo in the DWO context.

compile_unit_range dwo_compile_units ()

Get compile units in the DWO context.

unit_iterator_range dwo_units ()

Get all units in the DWO context.

unsigned getNumCompileUnits ()

Get the number of compile units in this context.

unsigned getNumTypeUnits ()

Get the number of type units in this context.

unsigned getNumDWOCompileUnits ()

Get the number of compile units in the DWO context.

unsigned getNumDWOTypeUnits ()

Get the number of type units in the DWO context.

DWARFUnit * getUnitAtIndex (unsigned index)

Get the unit at the specified index.

DWARFUnit * getDWOUnitAtIndex (unsigned index)

Get the unit at the specified index for the DWO units.

DWARFCompileUnit * getDWOCompileUnitForHash (uint64_t Hash)

DWARFTypeUnit * getTypeUnitForHash (uint64_t Hash, bool IsDWO)

DWARFUnit * getUnitForOffset (uint64_t Offset)

Return the DWARF unit that includes an offset (relative to .debug_info).

DWARFCompileUnit * getCompileUnitForOffset (uint64_t Offset)

Return the compile unit that includes an offset (relative to .debug_info).

DWARFDie getDIEForOffset (uint64_t Offset)

Get a DIE given an exact offset.

unsigned getMaxVersion ()

unsigned getMaxDWOVersion ()

void setMaxVersionIfGreater (unsigned Version)

const DWARFUnitIndex & getCUIndex ()

DWARFGdbIndex & getGdbIndex ()

const DWARFUnitIndex & getTUIndex ()

const DWARFDebugAbbrev * getDebugAbbrev ()

Get a pointer to the parsed DebugAbbrev object.

const DWARFDebugLoc * getDebugLoc ()

Get a pointer to the parsed DebugLoc object.

const DWARFDebugAbbrev * getDebugAbbrevDWO ()

Get a pointer to the parsed dwo abbreviations object.

const DWARFDebugAranges * getDebugAranges ()

Get a pointer to the parsed DebugAranges object.

Expected< const DWARFDebugFrame * > getDebugFrame ()

Get a pointer to the parsed frame information object.

Expected< const DWARFDebugFrame * > getEHFrame ()

Get a pointer to the parsed eh frame information object.

const DWARFDebugMacro * getDebugMacinfo ()

Get a pointer to the parsed DebugMacinfo information object.

const DWARFDebugMacro * getDebugMacinfoDWO ()

Get a pointer to the parsed DebugMacinfoDWO information object.

const DWARFDebugMacro * getDebugMacro ()

Get a pointer to the parsed DebugMacro information object.

const DWARFDebugMacro * getDebugMacroDWO ()

Get a pointer to the parsed DebugMacroDWO information object.

const DWARFDebugNames & getDebugNames ()

Get a reference to the parsed accelerator table object.

const AppleAcceleratorTable & getAppleNames ()

Get a reference to the parsed accelerator table object.

const AppleAcceleratorTable & getAppleTypes ()

Get a reference to the parsed accelerator table object.

const AppleAcceleratorTable & getAppleNamespaces ()

Get a reference to the parsed accelerator table object.

const AppleAcceleratorTable & getAppleObjC ()

Get a reference to the parsed accelerator table object.

const DWARFDebugLine::LineTable * getLineTableForUnit (DWARFUnit *U)

Get a pointer to a parsed line table corresponding to a compile unit.

Expected< const DWARFDebugLine::LineTable * > getLineTableForUnit (DWARFUnit *U, function_ref< void(Error)> RecoverableErrorHandler)

Get a pointer to a parsed line table corresponding to a compile unit.

void clearLineTableForUnit (DWARFUnit *U)

DataExtractor getStringExtractor () const

DataExtractor getStringDWOExtractor () const

DataExtractor getLineStringExtractor () const

DIEsForAddress getDIEsForAddress (uint64_t Address, bool CheckDWO=false)

Get the compilation unit, the function DIE and lexical block DIE for the given address where applicable.

std::optional< DILineInfo > getLineInfoForAddress (object::SectionedAddress Address, DILineInfoSpecifier Specifier=DILineInfoSpecifier()) override

std::optional< DILineInfo > getLineInfoForDataAddress (object::SectionedAddress Address) override

DILineInfoTable getLineInfoForAddressRange (object::SectionedAddress Address, uint64_t Size, DILineInfoSpecifier Specifier=DILineInfoSpecifier()) override

DIInliningInfo getInliningInfoForAddress (object::SectionedAddress Address, DILineInfoSpecifier Specifier=DILineInfoSpecifier()) override

std::vector< DILocal > getLocalsForAddress (object::SectionedAddress Address) override

bool isLittleEndian () const

std::shared_ptr< DWARFContext > getDWOContext (StringRef AbsolutePath)

function_ref< void(Error)> getRecoverableErrorHandler ()

function_ref< void(Error)> getWarningHandler ()

uint8_t getCUAddrSize ()

Get address size from CUs.

Triple::ArchType getArch () const

DWARFCompileUnit * getCompileUnitForCodeAddress (uint64_t Address)

Return the compile unit which contains instruction with provided address.

DWARFCompileUnit * getCompileUnitForDataAddress (uint64_t Address)

Return the compile unit which contains data with the provided address.

bool getParseCUTUIndexManually () const

Returns whether CU/TU should be populated manually.

void setParseCUTUIndexManually (bool PCUTU)

Sets whether CU/TU should be populated manually.

Public Member Functions inherited from llvm::DIContext

DIContext (DIContextKind K)

virtual ~DIContext ()=default

DIContextKind getKind () const

Static Public Member Functions

static bool classof (const DIContext *DICtx)

static unsigned getMaxSupportedVersion ()

static bool isSupportedVersion (unsigned version)

static SmallVector< uint8_t, 3 > getSupportedAddressSizes ()

static bool isAddressSizeSupported (unsigned AddressSize)

template<typename... Ts>

static Error checkAddressSizeSupported (unsigned AddressSize, std::error_code EC, char const *Fmt, const Ts &...Vals)

static std::unique_ptr< DWARFContext > create (const object::ObjectFile &Obj, ProcessDebugRelocations RelocAction=ProcessDebugRelocations::Process, const LoadedObjectInfo *L=nullptr, std::string DWPName="", std::function< void(Error)> RecoverableErrorHandler=WithColor::defaultErrorHandler, std::function< void(Error)> WarningHandler=WithColor::defaultWarningHandler, bool ThreadSafe=false)

static std::unique_ptr< DWARFContext > create (const StringMap< std::unique_ptr< MemoryBuffer > > &Sections, uint8_t AddrSize, bool isLittleEndian=sys::IsLittleEndianHost, std::function< void(Error)> RecoverableErrorHandler=WithColor::defaultErrorHandler, std::function< void(Error)> WarningHandler=WithColor::defaultWarningHandler, bool ThreadSafe=false)

Friends

class DWARFContextState

Detailed Description

DWARFContext This data structure is the top level entity that deals with dwarf debug information parsing.

The actual data is supplied through DWARFObj.

Definition at line 49 of file DWARFContext.h.

Member Typedef Documentation

◆ compile_unit_range

using llvm::DWARFContext::compile_unit_range = DWARFUnitVector::compile_unit_range

Definition at line 166 of file DWARFContext.h.

◆ unit_iterator_range

using llvm::DWARFContext::unit_iterator_range = DWARFUnitVector::iterator_range

Definition at line 165 of file DWARFContext.h.

Member Enumeration Documentation

◆ ProcessDebugRelocations

enum class llvm::DWARFContext::ProcessDebugRelocations

strong

Enumerator
Process
Ignore

Definition at line 442 of file DWARFContext.h.

Constructor & Destructor Documentation

◆ DWARFContext() [1/2]

DWARFContext::DWARFContext ( std::unique_ptr< const DWARFObject > DObj,

std::string DWPName = "",

std::function< void(Error)> RecoverableErrorHandler = WithColor::defaultErrorHandler ,

std::function< void(Error)> WarningHandler = WithColor::defaultWarningHandler ,

bool ThreadSafe = false )

Definition at line 742 of file DWARFContext.cpp.

References llvm::DIContext::CK_DWARF, llvm::DIContext::DIContext(), and llvm::move().

Referenced by DWARFContext(), llvm::DWARFContext::DWARFContextState::DWARFContextState(), and operator=().

◆ ~DWARFContext()

DWARFContext::~DWARFContext ( )

overridedefault

◆ DWARFContext() [2/2]

llvm::DWARFContext::DWARFContext ( DWARFContext & )

delete

References DWARFContext().

Member Function Documentation

◆ checkAddressSizeSupported()

template<typename... Ts>

Error llvm::DWARFContext::checkAddressSizeSupported ( unsigned AddressSize,

std::error_code EC,

char const * Fmt,

const Ts &... Vals )

inlinestatic

Definition at line 417 of file DWARFContext.h.

References llvm::format(), getSupportedAddressSizes(), isAddressSizeSupported(), llvm::make_error(), Size, and llvm::Error::success().

Referenced by llvm::DWARFDebugArangeSet::extract(), llvm::DWARFDebugRangeList::extract(), llvm::DWARFListTableHeader::extract(), and llvm::DWARFUnitHeader::extract().

◆ classof()

bool llvm::DWARFContext::classof ( const DIContext * DICtx )

inlinestatic

Definition at line 149 of file DWARFContext.h.

References llvm::DIContext::CK_DWARF, llvm::DIContext::DIContext(), and llvm::DIContext::getKind().

◆ clearLineTableForUnit()

void DWARFContext::clearLineTableForUnit ( DWARFUnit * U )

Definition at line 1511 of file DWARFContext.cpp.

◆ compile_units()

compile_unit_range llvm::DWARFContext::compile_units ( )

inline

Get compile units in this context.

Definition at line 188 of file DWARFContext.h.

References info_section_units(), llvm::isCompileUnit(), and llvm::make_filter_range().

Referenced by dump(), extractCUsTus(), llvm::DWARFDebugAranges::generate(), getCompileUnitForDataAddress(), and getCUAddrSize().

◆ create() [1/2]

std::unique_ptr< DWARFContext > DWARFContext::create ( const object::ObjectFile & Obj,

ProcessDebugRelocations RelocAction = ProcessDebugRelocations::Process ,

const LoadedObjectInfo * L = nullptr,

std::string DWPName = "",

std::function< void(Error)> RecoverableErrorHandler = WithColor::defaultErrorHandler ,

std::function< void(Error)> WarningHandler = WithColor::defaultWarningHandler ,

bool ThreadSafe = false )

static

Definition at line 2452 of file DWARFContext.cpp.

Referenced by llvm::MachO::DylibReader::accumulateSourceLocFromDSYM(), llvm::orc::createDWARFContext(), llvm::logicalview::LVDWARFReader::createScopes(), llvm::InstrProfCorrelatorImpl< IntPtrT >::get(), and llvm::symbolize::LLVMSymbolizer::getOrCreateModuleInfo().

◆ create() [2/2]

std::unique_ptr< DWARFContext > DWARFContext::create ( const StringMap< std::unique_ptr< MemoryBuffer > > & Sections,

uint8_t AddrSize,

bool isLittleEndian = sys::IsLittleEndianHost ,

std::function< void(Error)> RecoverableErrorHandler = WithColor::defaultErrorHandler ,

std::function< void(Error)> WarningHandler = WithColor::defaultWarningHandler ,

bool ThreadSafe = false )

static

Definition at line 2468 of file DWARFContext.cpp.

References isLittleEndian().

◆ dump() [1/2]

void llvm::DWARFContext::dump ( raw_ostream & OS,

DIDumpOptions DumpOpts )

inlineoverridevirtual

Implements llvm::DIContext.

Definition at line 158 of file DWARFContext.h.

References llvm::DIDT_ID_Count, and dump().

◆ dump() [2/2]

void DWARFContext::dump ( raw_ostream & OS,

DIDumpOptions DumpOpts,

std::array< std::optional< uint64_t >, DIDT_ID_Count > DumpOffsets )

Dump a textual representation to OS.

If any DumpOffsets are present, dump only the record at the specified offset.

Definition at line 985 of file DWARFContext.cpp.

References compile_units(), llvm::Data, DF, llvm::DIDT_All, llvm::DIDT_ID_Count, llvm::DIDT_UUID, llvm::DIDumpOptions::DisplayRawContents, llvm::AppleAcceleratorTable::dump(), llvm::DWARFDebugAbbrev::dump(), llvm::DWARFDebugArangeSet::dump(), llvm::DWARFDebugLoc::dump(), llvm::DWARFDebugNames::dump(), llvm::DWARFDebugRangeList::dump(), llvm::DWARFDie::dump(), llvm::DWARFGdbIndex::dump(), llvm::DWARFUnitIndex::dump(), dumpAddrSection(), dumpLoclistsSection(), dumpPubTableSection(), dumpRnglistsSection(), dumpStringOffsetsSection(), llvm::DIDumpOptions::DumpType, dumpUUID(), dwo_info_section_units(), dwo_types_section_units(), dwo_units(), llvm::sys::path::extension(), llvm::DWARFDebugArangeSet::extract(), llvm::DWARFDebugRangeList::extract(), llvm::format(), getAppleNames(), getAppleNamespaces(), getAppleObjC(), getAppleTypes(), llvm::DataExtractor::getCStr(), getCUAddrSize(), getCUIndex(), getDebugAbbrev(), getDebugAbbrevDWO(), getDebugFrame(), getDebugLoc(), getDebugMacinfo(), getDebugMacinfoDWO(), getDebugMacro(), getDebugMacroDWO(), getDebugNames(), llvm::DWARFUnit::getDIEForOffset(), llvm::DWARFDie::getDwarfUnit(), getEHFrame(), getGdbIndex(), getMaxVersion(), getNumCompileUnits(), getNumDWOCompileUnits(), getNumDWOTypeUnits(), getNumTypeUnits(), getTUIndex(), I, info_section_units(), isLittleEndian(), llvm::DataExtractor::isValidOffset(), llvm::Macro, llvm::DIDumpOptions::noImplicitRecursion(), normal_units(), llvm::Offset, llvm::DIDumpOptions::RecoverableErrorHandler, llvm::Error::success(), types_section_units(), llvm::DIDumpOptions::Verbose, llvm::DIDumpOptions::WarningHandler, and llvm::raw_ostream::write_escaped().

Referenced by dump().

◆ dwo_compile_units()

compile_unit_range llvm::DWARFContext::dwo_compile_units ( )

inline

Get compile units in the DWO context.

Definition at line 223 of file DWARFContext.h.

References dwo_info_section_units(), llvm::isCompileUnit(), and llvm::make_filter_range().

Referenced by getDWOCompileUnitForHash().

◆ dwo_info_section_units()

unit_iterator_range llvm::DWARFContext::dwo_info_section_units ( )

inline

Get units from .debug_info..dwo in the DWO context.

Definition at line 202 of file DWARFContext.h.

References llvm::SmallVectorTemplateCommon< T, typename >::begin(), and llvm::DWARFUnitVector::getNumInfoUnits().

Referenced by dump(), dwo_compile_units(), and getMaxDWOVersion().

◆ dwo_types_section_units()

unit_iterator_range llvm::DWARFContext::dwo_types_section_units ( )

inline

Get units from .debug_types.dwo in the DWO context.

Definition at line 216 of file DWARFContext.h.

References llvm::SmallVectorTemplateCommon< T, typename >::begin(), llvm::SmallVectorTemplateCommon< T, typename >::end(), and llvm::DWARFUnitVector::getNumInfoUnits().

Referenced by dump().

◆ dwo_units()

unit_iterator_range llvm::DWARFContext::dwo_units ( )

inline

Get all units in the DWO context.

Definition at line 232 of file DWARFContext.h.

References llvm::SmallVectorTemplateCommon< T, typename >::begin(), and llvm::SmallVectorTemplateCommon< T, typename >::end().

Referenced by dump(), and extractCUsTus().

◆ getAppleNames()

const AppleAcceleratorTable & DWARFContext::getAppleNames ( )

Get a reference to the parsed accelerator table object.

Definition at line 1479 of file DWARFContext.cpp.

Referenced by dump().

◆ getAppleNamespaces()

const AppleAcceleratorTable & DWARFContext::getAppleNamespaces ( )

Get a reference to the parsed accelerator table object.

Definition at line 1487 of file DWARFContext.cpp.

Referenced by dump().

◆ getAppleObjC()

const AppleAcceleratorTable & DWARFContext::getAppleObjC ( )

Get a reference to the parsed accelerator table object.

Definition at line 1491 of file DWARFContext.cpp.

Referenced by dump().

◆ getAppleTypes()

const AppleAcceleratorTable & DWARFContext::getAppleTypes ( )

Get a reference to the parsed accelerator table object.

Definition at line 1483 of file DWARFContext.cpp.

Referenced by dump().

◆ getArch()

Triple::ArchType llvm::DWARFContext::getArch ( ) const

inline

Definition at line 467 of file DWARFContext.h.

References getDWARFObj().

◆ getCompileUnitForCodeAddress()

DWARFCompileUnit * DWARFContext::getCompileUnitForCodeAddress ( uint64_t Address )

Return the compile unit which contains instruction with provided address.

TODO: change input parameter from "uint64_t Address" into "SectionedAddress Address"

Definition at line 1527 of file DWARFContext.cpp.

References llvm::Address, llvm::DWARFDebugAranges::findAddress(), getCompileUnitForOffset(), and getDebugAranges().

Referenced by getDIEsForAddress(), getInliningInfoForAddress(), getLineInfoForAddress(), getLineInfoForAddressRange(), and getLocalsForAddress().

◆ getCompileUnitForDataAddress()

DWARFCompileUnit * DWARFContext::getCompileUnitForDataAddress ( uint64_t Address )

Return the compile unit which contains data with the provided address.

Note: This is more expensive than getCompileUnitForAddress, as if Address isn't found in the CU ranges (which is cheap), then it falls back to an expensive O(n) walk of all CU's looking for data that spans the address. TODO: change input parameter from "uint64_t Address" into "SectionedAddress Address"

Definition at line 1532 of file DWARFContext.cpp.

References llvm::Address, compile_units(), llvm::DWARFDebugAranges::findAddress(), getCompileUnitForOffset(), and getDebugAranges().

Referenced by getLineInfoForDataAddress().

◆ getCompileUnitForOffset()

DWARFCompileUnit * DWARFContext::getCompileUnitForOffset ( uint64_t Offset )

Return the compile unit that includes an offset (relative to .debug_info).

Definition at line 1523 of file DWARFContext.cpp.

References llvm::dyn_cast_or_null(), getUnitForOffset(), and llvm::Offset.

Referenced by getCompileUnitForCodeAddress(), and getCompileUnitForDataAddress().

◆ getCUAddrSize()

uint8_t DWARFContext::getCUAddrSize ( )

Get address size from CUs.

TODO: refactor compile_units() to make this const.

Definition at line 2479 of file DWARFContext.cpp.

References compile_units().

Referenced by dump().

◆ getCUIndex()

const DWARFUnitIndex & DWARFContext::getCUIndex ( )

Definition at line 1422 of file DWARFContext.cpp.

Referenced by dump(), and getDWOCompileUnitForHash().

◆ getDebugAbbrev()

const DWARFDebugAbbrev * DWARFContext::getDebugAbbrev ( )

Get a pointer to the parsed DebugAbbrev object.

Definition at line 1434 of file DWARFContext.cpp.

Referenced by dump().

◆ getDebugAbbrevDWO()

const DWARFDebugAbbrev * DWARFContext::getDebugAbbrevDWO ( )

Get a pointer to the parsed dwo abbreviations object.

Definition at line 1438 of file DWARFContext.cpp.

Referenced by dump().

◆ getDebugAranges()

const DWARFDebugAranges * DWARFContext::getDebugAranges ( )

Get a pointer to the parsed DebugAranges object.

Definition at line 1446 of file DWARFContext.cpp.

Referenced by getCompileUnitForCodeAddress(), and getCompileUnitForDataAddress().

◆ getDebugFrame()

Expected< const DWARFDebugFrame * > DWARFContext::getDebugFrame ( )

Get a pointer to the parsed frame information object.

Definition at line 1450 of file DWARFContext.cpp.

Referenced by dump().

◆ getDebugLoc()

const DWARFDebugLoc * DWARFContext::getDebugLoc ( )

Get a pointer to the parsed DebugLoc object.

Definition at line 1442 of file DWARFContext.cpp.

Referenced by dump().

◆ getDebugMacinfo()

const DWARFDebugMacro * DWARFContext::getDebugMacinfo ( )

Get a pointer to the parsed DebugMacinfo information object.

Definition at line 1466 of file DWARFContext.cpp.

Referenced by dump().

◆ getDebugMacinfoDWO()

const DWARFDebugMacro * DWARFContext::getDebugMacinfoDWO ( )

Get a pointer to the parsed DebugMacinfoDWO information object.

Definition at line 1470 of file DWARFContext.cpp.

Referenced by dump().

◆ getDebugMacro()

const DWARFDebugMacro * DWARFContext::getDebugMacro ( )

Get a pointer to the parsed DebugMacro information object.

Definition at line 1458 of file DWARFContext.cpp.

Referenced by dump().

◆ getDebugMacroDWO()

const DWARFDebugMacro * DWARFContext::getDebugMacroDWO ( )

Get a pointer to the parsed DebugMacroDWO information object.

Definition at line 1462 of file DWARFContext.cpp.

Referenced by dump().

◆ getDebugNames()

const DWARFDebugNames & DWARFContext::getDebugNames ( )

Get a reference to the parsed accelerator table object.

Definition at line 1475 of file DWARFContext.cpp.

Referenced by dump().

◆ getDIEForOffset()

DWARFDie DWARFContext::getDIEForOffset ( uint64_t Offset )

Get a DIE given an exact offset.

Definition at line 1396 of file DWARFContext.cpp.

References llvm::Offset.

◆ getDIEsForAddress()

DWARFContext::DIEsForAddress DWARFContext::getDIEsForAddress ( uint64_t Address,

bool CheckDWO = false )

Get the compilation unit, the function DIE and lexical block DIE for the given address where applicable.

TODO: change input parameter from "uint64_t Address" into "SectionedAddress Address"

Parameters: [in] CheckDWO If this is false then only search for address matches in the current context's DIEs. If this is true, then each DWARFUnit that has a DWO file will have the debug info in the DWO file searched as well. This allows for lookups to succeed by searching the split DWARF debug info when using the main executable's debug info.

Definition at line 1555 of file DWARFContext.cpp.

References llvm::Address, llvm::append_range(), llvm::dyn_cast_or_null(), getCompileUnitForCodeAddress(), llvm::DWARFDie::getDwarfUnit(), llvm::DWARFUnit::getSubroutineForAddress(), and llvm::DIE::getTag().