#include "DwarfUnit.h"
#include "DwarfAccelTable.h"
#include "DwarfCompileUnit.h"
#include "DwarfDebug.h"
#include "DwarfExpression.h"
#include "llvm/ADT/APFloat.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DIBuilder.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/GlobalVariable.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/Mangler.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCSection.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Target/TargetFrameLowering.h"
#include "llvm/Target/TargetLoweringObjectFile.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetRegisterInfo.h"
#include "llvm/Target/TargetSubtargetInfo.h"
using namespace llvm;
#define DEBUG_TYPE "dwarfdebug"
static cl::opt<bool>
GenerateDwarfTypeUnits("generate-type-units", cl::Hidden,
cl::desc("Generate DWARF4 type units."),
cl::init(false));
DIEDwarfExpression::DIEDwarfExpression(const AsmPrinter &AP, DwarfUnit &DU,
DIELoc &DIE)
: DwarfExpression(*AP.MF->getSubtarget().getRegisterInfo(),
AP.getDwarfDebug()->getDwarfVersion()),
AP(AP), DU(DU), DIE(DIE) {}
void DIEDwarfExpression::EmitOp(uint8_t Op, const char* Comment) {
DU.addUInt(DIE, dwarf::DW_FORM_data1, Op);
}
void DIEDwarfExpression::EmitSigned(int64_t Value) {
DU.addSInt(DIE, dwarf::DW_FORM_sdata, Value);
}
void DIEDwarfExpression::EmitUnsigned(uint64_t Value) {
DU.addUInt(DIE, dwarf::DW_FORM_udata, Value);
}
bool DIEDwarfExpression::isFrameRegister(unsigned MachineReg) {
return MachineReg == TRI.getFrameRegister(*AP.MF);
}
DwarfUnit::DwarfUnit(unsigned UID, dwarf::Tag UnitTag,
const DICompileUnit *Node, AsmPrinter *A, DwarfDebug *DW,
DwarfFile *DWU)
: UniqueID(UID), CUNode(Node),
UnitDie(*DIE::get(DIEValueAllocator, UnitTag)), DebugInfoOffset(0),
Asm(A), DD(DW), DU(DWU), IndexTyDie(nullptr), Section(nullptr) {
assert(UnitTag == dwarf::DW_TAG_compile_unit ||
UnitTag == dwarf::DW_TAG_type_unit);
}
DwarfTypeUnit::DwarfTypeUnit(unsigned UID, DwarfCompileUnit &CU, AsmPrinter *A,
DwarfDebug *DW, DwarfFile *DWU,
MCDwarfDwoLineTable *SplitLineTable)
: DwarfUnit(UID, dwarf::DW_TAG_type_unit, CU.getCUNode(), A, DW, DWU),
CU(CU), SplitLineTable(SplitLineTable) {
if (SplitLineTable)
addSectionOffset(UnitDie, dwarf::DW_AT_stmt_list, 0);
}
DwarfUnit::~DwarfUnit() {
for (unsigned j = 0, M = DIEBlocks.size(); j < M; ++j)
DIEBlocks[j]->~DIEBlock();
for (unsigned j = 0, M = DIELocs.size(); j < M; ++j)
DIELocs[j]->~DIELoc();
}
int64_t DwarfUnit::getDefaultLowerBound() const {
switch (getLanguage()) {
default:
break;
case dwarf::DW_LANG_C89:
case dwarf::DW_LANG_C99:
case dwarf::DW_LANG_C:
case dwarf::DW_LANG_C_plus_plus:
case dwarf::DW_LANG_ObjC:
case dwarf::DW_LANG_ObjC_plus_plus:
return 0;
case dwarf::DW_LANG_Fortran77:
case dwarf::DW_LANG_Fortran90:
case dwarf::DW_LANG_Fortran95:
return 1;
case dwarf::DW_LANG_Java:
case dwarf::DW_LANG_Python:
case dwarf::DW_LANG_UPC:
case dwarf::DW_LANG_D:
if (dwarf::DWARF_VERSION >= 4)
return 0;
break;
case dwarf::DW_LANG_Ada83:
case dwarf::DW_LANG_Ada95:
case dwarf::DW_LANG_Cobol74:
case dwarf::DW_LANG_Cobol85:
case dwarf::DW_LANG_Modula2:
case dwarf::DW_LANG_Pascal83:
case dwarf::DW_LANG_PLI:
if (dwarf::DWARF_VERSION >= 4)
return 1;
break;
case dwarf::DW_LANG_OpenCL:
case dwarf::DW_LANG_Go:
case dwarf::DW_LANG_Haskell:
case dwarf::DW_LANG_C_plus_plus_03:
case dwarf::DW_LANG_C_plus_plus_11:
case dwarf::DW_LANG_OCaml:
case dwarf::DW_LANG_Rust:
case dwarf::DW_LANG_C11:
case dwarf::DW_LANG_Swift:
case dwarf::DW_LANG_Dylan:
case dwarf::DW_LANG_C_plus_plus_14:
if (dwarf::DWARF_VERSION >= 5)
return 0;
break;
case dwarf::DW_LANG_Modula3:
case dwarf::DW_LANG_Julia:
case dwarf::DW_LANG_Fortran03:
case dwarf::DW_LANG_Fortran08:
if (dwarf::DWARF_VERSION >= 5)
return 1;
break;
}
return -1;
}
static bool isShareableAcrossCUs(const DINode *D) {
return (isa<DIType>(D) ||
(isa<DISubprogram>(D) && !cast<DISubprogram>(D)->isDefinition())) &&
!GenerateDwarfTypeUnits;
}
DIE *DwarfUnit::getDIE(const DINode *D) const {
if (isShareableAcrossCUs(D))
return DU->getDIE(D);
return MDNodeToDieMap.lookup(D);
}
void DwarfUnit::insertDIE(const DINode *Desc, DIE *D) {
if (isShareableAcrossCUs(Desc)) {
DU->insertDIE(Desc, D);
return;
}
MDNodeToDieMap.insert(std::make_pair(Desc, D));
}
void DwarfUnit::addFlag(DIE &Die, dwarf::Attribute Attribute) {
if (DD->getDwarfVersion() >= 4)
Die.addValue(DIEValueAllocator, Attribute, dwarf::DW_FORM_flag_present,
DIEInteger(1));
else
Die.addValue(DIEValueAllocator, Attribute, dwarf::DW_FORM_flag,
DIEInteger(1));
}
void DwarfUnit::addUInt(DIEValueList &Die, dwarf::Attribute Attribute,
Optional<dwarf::Form> Form, uint64_t Integer) {
if (!Form)
Form = DIEInteger::BestForm(false, Integer);
Die.addValue(DIEValueAllocator, Attribute, *Form, DIEInteger(Integer));
}
void DwarfUnit::addUInt(DIEValueList &Block, dwarf::Form Form,
uint64_t Integer) {
addUInt(Block, (dwarf::Attribute)0, Form, Integer);
}
void DwarfUnit::addSInt(DIEValueList &Die, dwarf::Attribute Attribute,
Optional<dwarf::Form> Form, int64_t Integer) {
if (!Form)
Form = DIEInteger::BestForm(true, Integer);
Die.addValue(DIEValueAllocator, Attribute, *Form, DIEInteger(Integer));
}
void DwarfUnit::addSInt(DIELoc &Die, Optional<dwarf::Form> Form,
int64_t Integer) {
addSInt(Die, (dwarf::Attribute)0, Form, Integer);
}
void DwarfUnit::addString(DIE &Die, dwarf::Attribute Attribute,
StringRef String) {
Die.addValue(DIEValueAllocator, Attribute,
isDwoUnit() ? dwarf::DW_FORM_GNU_str_index : dwarf::DW_FORM_strp,
DIEString(DU->getStringPool().getEntry(*Asm, String)));
}
DIEValueList::value_iterator DwarfUnit::addLabel(DIEValueList &Die,
dwarf::Attribute Attribute,
dwarf::Form Form,
const MCSymbol *Label) {
return Die.addValue(DIEValueAllocator, Attribute, Form, DIELabel(Label));
}
void DwarfUnit::addLabel(DIELoc &Die, dwarf::Form Form, const MCSymbol *Label) {
addLabel(Die, (dwarf::Attribute)0, Form, Label);
}
void DwarfUnit::addSectionOffset(DIE &Die, dwarf::Attribute Attribute,
uint64_t Integer) {
if (DD->getDwarfVersion() >= 4)
addUInt(Die, Attribute, dwarf::DW_FORM_sec_offset, Integer);
else
addUInt(Die, Attribute, dwarf::DW_FORM_data4, Integer);
}
unsigned DwarfTypeUnit::getOrCreateSourceID(StringRef FileName, StringRef DirName) {
return SplitLineTable ? SplitLineTable->getFile(DirName, FileName)
: getCU().getOrCreateSourceID(FileName, DirName);
}
void DwarfUnit::addOpAddress(DIELoc &Die, const MCSymbol *Sym) {
if (!DD->useSplitDwarf()) {
addUInt(Die, dwarf::DW_FORM_data1, dwarf::DW_OP_addr);
addLabel(Die, dwarf::DW_FORM_udata, Sym);
} else {
addUInt(Die, dwarf::DW_FORM_data1, dwarf::DW_OP_GNU_addr_index);
addUInt(Die, dwarf::DW_FORM_GNU_addr_index,
DD->getAddressPool().getIndex(Sym));
}
}
void DwarfUnit::addLabelDelta(DIE &Die, dwarf::Attribute Attribute,
const MCSymbol *Hi, const MCSymbol *Lo) {
Die.addValue(DIEValueAllocator, Attribute, dwarf::DW_FORM_data4,
new (DIEValueAllocator) DIEDelta(Hi, Lo));
}
void DwarfUnit::addDIEEntry(DIE &Die, dwarf::Attribute Attribute, DIE &Entry) {
addDIEEntry(Die, Attribute, DIEEntry(Entry));
}
void DwarfUnit::addDIETypeSignature(DIE &Die, const DwarfTypeUnit &Type) {
addFlag(Die, dwarf::DW_AT_declaration);
Die.addValue(DIEValueAllocator, dwarf::DW_AT_signature,
dwarf::DW_FORM_ref_sig8, DIETypeSignature(Type));
}
void DwarfUnit::addDIETypeSignature(DIE &Die, dwarf::Attribute Attribute,
StringRef Identifier) {
uint64_t Signature = DD->makeTypeSignature(Identifier);
Die.addValue(DIEValueAllocator, Attribute, dwarf::DW_FORM_ref_sig8,
DIEInteger(Signature));
}
void DwarfUnit::addDIEEntry(DIE &Die, dwarf::Attribute Attribute,
DIEEntry Entry) {
const DIE *DieCU = Die.getUnitOrNull();
const DIE *EntryCU = Entry.getEntry().getUnitOrNull();
if (!DieCU)
DieCU = &getUnitDie();
if (!EntryCU)
EntryCU = &getUnitDie();
Die.addValue(DIEValueAllocator, Attribute,
EntryCU == DieCU ? dwarf::DW_FORM_ref4 : dwarf::DW_FORM_ref_addr,
Entry);
}
DIE &DwarfUnit::createAndAddDIE(unsigned Tag, DIE &Parent, const DINode *N) {
DIE &Die = Parent.addChild(DIE::get(DIEValueAllocator, (dwarf::Tag)Tag));
if (N)
insertDIE(N, &Die);
return Die;
}
void DwarfUnit::addBlock(DIE &Die, dwarf::Attribute Attribute, DIELoc *Loc) {
Loc->ComputeSize(Asm);
DIELocs.push_back(Loc); Die.addValue(DIEValueAllocator, Attribute,
Loc->BestForm(DD->getDwarfVersion()), Loc);
}
void DwarfUnit::addBlock(DIE &Die, dwarf::Attribute Attribute,
DIEBlock *Block) {
Block->ComputeSize(Asm);
DIEBlocks.push_back(Block); Die.addValue(DIEValueAllocator, Attribute, Block->BestForm(), Block);
}
void DwarfUnit::addSourceLine(DIE &Die, unsigned Line, StringRef File,
StringRef Directory) {
if (Line == 0)
return;
unsigned FileID = getOrCreateSourceID(File, Directory);
assert(FileID && "Invalid file id");
addUInt(Die, dwarf::DW_AT_decl_file, None, FileID);
addUInt(Die, dwarf::DW_AT_decl_line, None, Line);
}
void DwarfUnit::addSourceLine(DIE &Die, const DILocalVariable *V) {
assert(V);
addSourceLine(Die, V->getLine(), V->getScope()->getFilename(),
V->getScope()->getDirectory());
}
void DwarfUnit::addSourceLine(DIE &Die, const DIGlobalVariable *G) {
assert(G);
addSourceLine(Die, G->getLine(), G->getFilename(), G->getDirectory());
}
void DwarfUnit::addSourceLine(DIE &Die, const DISubprogram *SP) {
assert(SP);
addSourceLine(Die, SP->getLine(), SP->getFilename(), SP->getDirectory());
}
void DwarfUnit::addSourceLine(DIE &Die, const DIType *Ty) {
assert(Ty);
addSourceLine(Die, Ty->getLine(), Ty->getFilename(), Ty->getDirectory());
}
void DwarfUnit::addSourceLine(DIE &Die, const DIObjCProperty *Ty) {
assert(Ty);
addSourceLine(Die, Ty->getLine(), Ty->getFilename(), Ty->getDirectory());
}
void DwarfUnit::addSourceLine(DIE &Die, const DINamespace *NS) {
addSourceLine(Die, NS->getLine(), NS->getFilename(), NS->getDirectory());
}
bool DwarfUnit::addRegisterOpPiece(DIELoc &TheDie, unsigned Reg,
unsigned SizeInBits, unsigned OffsetInBits) {
DIEDwarfExpression Expr(*Asm, *this, TheDie);
Expr.AddMachineRegPiece(Reg, SizeInBits, OffsetInBits);
return true;
}
bool DwarfUnit::addRegisterOffset(DIELoc &TheDie, unsigned Reg,
int64_t Offset) {
DIEDwarfExpression Expr(*Asm, *this, TheDie);
return Expr.AddMachineRegIndirect(Reg, Offset);
}
void DwarfUnit::addBlockByrefAddress(const DbgVariable &DV, DIE &Die,
dwarf::Attribute Attribute,
const MachineLocation &Location) {
const DIType *Ty = DV.getType();
const DIType *TmpTy = Ty;
uint16_t Tag = Ty->getTag();
bool isPointer = false;
StringRef varName = DV.getName();
if (Tag == dwarf::DW_TAG_pointer_type) {
auto *DTy = cast<DIDerivedType>(Ty);
TmpTy = resolve(DTy->getBaseType());
isPointer = true;
}
DINodeArray Fields = cast<DICompositeType>(TmpTy)->getElements();
const DIDerivedType *varField = nullptr;
const DIDerivedType *forwardingField = nullptr;
for (unsigned i = 0, N = Fields.size(); i < N; ++i) {
auto *DT = cast<DIDerivedType>(Fields[i]);
StringRef fieldName = DT->getName();
if (fieldName == "__forwarding")
forwardingField = DT;
else if (fieldName == varName)
varField = DT;
}
unsigned forwardingFieldOffset = forwardingField->getOffsetInBits() >> 3;
unsigned varFieldOffset = varField->getOffsetInBits() >> 2;
DIELoc *Loc = new (DIEValueAllocator) DIELoc;
bool validReg;
if (Location.isReg())
validReg = addRegisterOpPiece(*Loc, Location.getReg());
else
validReg = addRegisterOffset(*Loc, Location.getReg(), Location.getOffset());
if (!validReg)
return;
if (isPointer)
addUInt(*Loc, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);
if (forwardingFieldOffset > 0) {
addUInt(*Loc, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst);
addUInt(*Loc, dwarf::DW_FORM_udata, forwardingFieldOffset);
}
addUInt(*Loc, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);
if (varFieldOffset > 0) {
addUInt(*Loc, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst);
addUInt(*Loc, dwarf::DW_FORM_udata, varFieldOffset);
}
addBlock(Die, Attribute, Loc);
}
static bool isUnsignedDIType(DwarfDebug *DD, const DIType *Ty) {
if (auto *CTy = dyn_cast<DICompositeType>(Ty)) {
if (CTy->getTag() == dwarf::DW_TAG_enumeration_type)
return false;
return true;
}
if (auto *DTy = dyn_cast<DIDerivedType>(Ty)) {
dwarf::Tag T = (dwarf::Tag)Ty->getTag();
if (T == dwarf::DW_TAG_pointer_type ||
T == dwarf::DW_TAG_ptr_to_member_type ||
T == dwarf::DW_TAG_reference_type ||
T == dwarf::DW_TAG_rvalue_reference_type)
return true;
assert(T == dwarf::DW_TAG_typedef || T == dwarf::DW_TAG_const_type ||
T == dwarf::DW_TAG_volatile_type ||
T == dwarf::DW_TAG_restrict_type);
DITypeRef Deriv = DTy->getBaseType();
assert(Deriv && "Expected valid base type");
return isUnsignedDIType(DD, DD->resolve(Deriv));
}
auto *BTy = cast<DIBasicType>(Ty);
unsigned Encoding = BTy->getEncoding();
assert((Encoding == dwarf::DW_ATE_unsigned ||
Encoding == dwarf::DW_ATE_unsigned_char ||
Encoding == dwarf::DW_ATE_signed ||
Encoding == dwarf::DW_ATE_signed_char ||
Encoding == dwarf::DW_ATE_float || Encoding == dwarf::DW_ATE_UTF ||
Encoding == dwarf::DW_ATE_boolean ||
(Ty->getTag() == dwarf::DW_TAG_unspecified_type &&
Ty->getName() == "decltype(nullptr)")) &&
"Unsupported encoding");
return Encoding == dwarf::DW_ATE_unsigned ||
Encoding == dwarf::DW_ATE_unsigned_char ||
Encoding == dwarf::DW_ATE_UTF || Encoding == dwarf::DW_ATE_boolean ||
Ty->getTag() == dwarf::DW_TAG_unspecified_type;
}
static uint64_t getBaseTypeSize(DwarfDebug *DD, const DIDerivedType *Ty) {
unsigned Tag = Ty->getTag();
if (Tag != dwarf::DW_TAG_member && Tag != dwarf::DW_TAG_typedef &&
Tag != dwarf::DW_TAG_const_type && Tag != dwarf::DW_TAG_volatile_type &&
Tag != dwarf::DW_TAG_restrict_type)
return Ty->getSizeInBits();
auto *BaseType = DD->resolve(Ty->getBaseType());
assert(BaseType && "Unexpected invalid base type");
if (BaseType->getTag() == dwarf::DW_TAG_reference_type ||
BaseType->getTag() == dwarf::DW_TAG_rvalue_reference_type ||
(isa<DICompositeType>(BaseType) &&
cast<DICompositeType>(BaseType)->isExternalTypeRef()))
return Ty->getSizeInBits();
if (auto *DT = dyn_cast<DIDerivedType>(BaseType))
return getBaseTypeSize(DD, DT);
return BaseType->getSizeInBits();
}
void DwarfUnit::addConstantFPValue(DIE &Die, const MachineOperand &MO) {
assert(MO.isFPImm() && "Invalid machine operand!");
DIEBlock *Block = new (DIEValueAllocator) DIEBlock;
APFloat FPImm = MO.getFPImm()->getValueAPF();
const APInt FltVal = FPImm.bitcastToAPInt();
const char *FltPtr = (const char *)FltVal.getRawData();
int NumBytes = FltVal.getBitWidth() / 8; bool LittleEndian = Asm->getDataLayout().isLittleEndian();
int Incr = (LittleEndian ? 1 : -1);
int Start = (LittleEndian ? 0 : NumBytes - 1);
int Stop = (LittleEndian ? NumBytes : -1);
for (; Start != Stop; Start += Incr)
addUInt(*Block, dwarf::DW_FORM_data1, (unsigned char)0xFF & FltPtr[Start]);
addBlock(Die, dwarf::DW_AT_const_value, Block);
}
void DwarfUnit::addConstantFPValue(DIE &Die, const ConstantFP *CFP) {
addConstantValue(Die, CFP->getValueAPF().bitcastToAPInt(), true);
}
void DwarfUnit::addConstantValue(DIE &Die, const ConstantInt *CI,
const DIType *Ty) {
addConstantValue(Die, CI->getValue(), Ty);
}
void DwarfUnit::addConstantValue(DIE &Die, const MachineOperand &MO,
const DIType *Ty) {
assert(MO.isImm() && "Invalid machine operand!");
addConstantValue(Die, isUnsignedDIType(DD, Ty), MO.getImm());
}
void DwarfUnit::addConstantValue(DIE &Die, bool Unsigned, uint64_t Val) {
addUInt(Die, dwarf::DW_AT_const_value,
Unsigned ? dwarf::DW_FORM_udata : dwarf::DW_FORM_sdata, Val);
}
void DwarfUnit::addConstantValue(DIE &Die, const APInt &Val, const DIType *Ty) {
addConstantValue(Die, Val, isUnsignedDIType(DD, Ty));
}
void DwarfUnit::addConstantValue(DIE &Die, const APInt &Val, bool Unsigned) {
unsigned CIBitWidth = Val.getBitWidth();
if (CIBitWidth <= 64) {
addConstantValue(Die, Unsigned,
Unsigned ? Val.getZExtValue() : Val.getSExtValue());
return;
}
DIEBlock *Block = new (DIEValueAllocator) DIEBlock;
const uint64_t *Ptr64 = Val.getRawData();
int NumBytes = Val.getBitWidth() / 8; bool LittleEndian = Asm->getDataLayout().isLittleEndian();
for (int i = 0; i < NumBytes; i++) {
uint8_t c;
if (LittleEndian)
c = Ptr64[i / 8] >> (8 * (i & 7));
else
c = Ptr64[(NumBytes - 1 - i) / 8] >> (8 * ((NumBytes - 1 - i) & 7));
addUInt(*Block, dwarf::DW_FORM_data1, c);
}
addBlock(Die, dwarf::DW_AT_const_value, Block);
}
void DwarfUnit::addLinkageName(DIE &Die, StringRef LinkageName) {
if (!LinkageName.empty() && DD->useLinkageNames())
addString(Die,
DD->getDwarfVersion() >= 4 ? dwarf::DW_AT_linkage_name
: dwarf::DW_AT_MIPS_linkage_name,
GlobalValue::getRealLinkageName(LinkageName));
}
void DwarfUnit::addTemplateParams(DIE &Buffer, DINodeArray TParams) {
for (const auto *Element : TParams) {
if (auto *TTP = dyn_cast<DITemplateTypeParameter>(Element))
constructTemplateTypeParameterDIE(Buffer, TTP);
else if (auto *TVP = dyn_cast<DITemplateValueParameter>(Element))
constructTemplateValueParameterDIE(Buffer, TVP);
}
}
DIE *DwarfUnit::getOrCreateContextDIE(const DIScope *Context) {
if (!Context || isa<DIFile>(Context))
return &getUnitDie();
if (auto *T = dyn_cast<DIType>(Context))
return getOrCreateTypeDIE(T);
if (auto *NS = dyn_cast<DINamespace>(Context))
return getOrCreateNameSpace(NS);
if (auto *M = dyn_cast<DIModule>(Context))
return getOrCreateModule(M);
if (auto *SP = dyn_cast<DISubprogram>(Context))
return getOrCreateSubprogramDIE(SP);
if (auto *M = dyn_cast<DIModule>(Context))
return getOrCreateModule(M);
return getDIE(Context);
}
DIE *DwarfUnit::createTypeDIE(const DICompositeType *Ty) {
auto *Context = resolve(Ty->getScope());
DIE *ContextDIE = getOrCreateContextDIE(Context);
if (DIE *TyDIE = getDIE(Ty))
return TyDIE;
DIE &TyDIE = createAndAddDIE(Ty->getTag(), *ContextDIE, Ty);
constructTypeDIE(TyDIE, cast<DICompositeType>(Ty));
if (!Ty->isExternalTypeRef())
updateAcceleratorTables(Context, Ty, TyDIE);
return &TyDIE;
}
DIE *DwarfUnit::getOrCreateTypeDIE(const MDNode *TyNode) {
if (!TyNode)
return nullptr;
auto *Ty = cast<DIType>(TyNode);
assert(Ty == resolve(Ty->getRef()) &&
"type was not uniqued, possible ODR violation.");
if (Ty->getTag() == dwarf::DW_TAG_restrict_type && DD->getDwarfVersion() <= 2)
return getOrCreateTypeDIE(resolve(cast<DIDerivedType>(Ty)->getBaseType()));
auto *Context = resolve(Ty->getScope());
DIE *ContextDIE = getOrCreateContextDIE(Context);
assert(ContextDIE);
if (DIE *TyDIE = getDIE(Ty))
return TyDIE;
DIE &TyDIE = createAndAddDIE(Ty->getTag(), *ContextDIE, Ty);
updateAcceleratorTables(Context, Ty, TyDIE);
if (auto *BT = dyn_cast<DIBasicType>(Ty))
constructTypeDIE(TyDIE, BT);
else if (auto *STy = dyn_cast<DISubroutineType>(Ty))
constructTypeDIE(TyDIE, STy);
else if (auto *CTy = dyn_cast<DICompositeType>(Ty)) {
if (GenerateDwarfTypeUnits && !Ty->isForwardDecl())
if (MDString *TypeId = CTy->getRawIdentifier()) {
DD->addDwarfTypeUnitType(getCU(), TypeId->getString(), TyDIE, CTy);
return &TyDIE;
}
constructTypeDIE(TyDIE, CTy);
} else {
constructTypeDIE(TyDIE, cast<DIDerivedType>(Ty));
}
return &TyDIE;
}
void DwarfUnit::updateAcceleratorTables(const DIScope *Context,
const DIType *Ty, const DIE &TyDIE) {
bool IsImplementation = 0;
if (auto *CT = dyn_cast<DICompositeType>(Ty)) {
IsImplementation = CT->getRuntimeLang() == 0 || CT->isObjcClassComplete();
}
unsigned Flags = IsImplementation ? dwarf::DW_FLAG_type_implementation : 0;
if (CUNode->getEmissionKind() == DIBuilder::ClangModule)
if (auto *CT = dyn_cast<DICompositeType>(Ty))
if (auto *CTy = CT->getRawIdentifier())
DD->addAccelType(CTy->getString(), TyDIE, Flags);
StringRef Name = Ty->getName();
if (!Name.empty() && !Ty->isForwardDecl()) {
DD->addAccelType(Name, TyDIE, Flags);
if (!Context || isa<DICompileUnit>(Context) || isa<DIFile>(Context) ||
isa<DINamespace>(Context))
addGlobalType(Ty, TyDIE, Context);
}
}
void DwarfUnit::addType(DIE &Entity, const DIType *Ty,
dwarf::Attribute Attribute) {
assert(Ty && "Trying to add a type that doesn't exist?");
addDIEEntry(Entity, Attribute, DIEEntry(*getOrCreateTypeDIE(Ty)));
}
std::string DwarfUnit::getParentContextString(const DIScope *Context) const {
if (!Context)
return "";
if (getLanguage() != dwarf::DW_LANG_C_plus_plus)
return "";
std::string CS;
SmallVector<const DIScope *, 1> Parents;
while (!isa<DICompileUnit>(Context)) {
Parents.push_back(Context);
if (Context->getScope())
Context = resolve(Context->getScope());
else
break;
}
for (const DIScope *Ctx : make_range(Parents.rbegin(), Parents.rend())) {
StringRef Name = Ctx->getName();
if (Name.empty() && isa<DINamespace>(Ctx))
Name = "(anonymous namespace)";
if (!Name.empty()) {
CS += Name;
CS += "::";
}
}
return CS;
}
void DwarfUnit::constructTypeDIE(DIE &Buffer, const DIBasicType *BTy) {
StringRef Name = BTy->getName();
if (!Name.empty())
addString(Buffer, dwarf::DW_AT_name, Name);
if (BTy->getTag() == dwarf::DW_TAG_unspecified_type)
return;
addUInt(Buffer, dwarf::DW_AT_encoding, dwarf::DW_FORM_data1,
BTy->getEncoding());
uint64_t Size = BTy->getSizeInBits() >> 3;
addUInt(Buffer, dwarf::DW_AT_byte_size, None, Size);
}
void DwarfUnit::constructTypeDIE(DIE &Buffer, const DIDerivedType *DTy) {
StringRef Name = DTy->getName();
uint64_t Size = DTy->getSizeInBits() >> 3;
uint16_t Tag = Buffer.getTag();
const DIType *FromTy = resolve(DTy->getBaseType());
if (FromTy)
addType(Buffer, FromTy);
if (!Name.empty())
addString(Buffer, dwarf::DW_AT_name, Name);
if (Size && Tag != dwarf::DW_TAG_pointer_type
&& Tag != dwarf::DW_TAG_ptr_to_member_type
&& Tag != dwarf::DW_TAG_reference_type
&& Tag != dwarf::DW_TAG_rvalue_reference_type)
addUInt(Buffer, dwarf::DW_AT_byte_size, None, Size);
if (Tag == dwarf::DW_TAG_ptr_to_member_type)
addDIEEntry(
Buffer, dwarf::DW_AT_containing_type,
*getOrCreateTypeDIE(resolve(cast<DIDerivedType>(DTy)->getClassType())));
if (!DTy->isForwardDecl())
addSourceLine(Buffer, DTy);
}
void DwarfUnit::constructSubprogramArguments(DIE &Buffer, DITypeRefArray Args) {
for (unsigned i = 1, N = Args.size(); i < N; ++i) {
const DIType *Ty = resolve(Args[i]);
if (!Ty) {
assert(i == N-1 && "Unspecified parameter must be the last argument");
createAndAddDIE(dwarf::DW_TAG_unspecified_parameters, Buffer);
} else {
DIE &Arg = createAndAddDIE(dwarf::DW_TAG_formal_parameter, Buffer);
addType(Arg, Ty);
if (Ty->isArtificial())
addFlag(Arg, dwarf::DW_AT_artificial);
}
}
}
void DwarfUnit::constructTypeDIE(DIE &Buffer, const DISubroutineType *CTy) {
auto Elements = cast<DISubroutineType>(CTy)->getTypeArray();
if (Elements.size())
if (auto RTy = resolve(Elements[0]))
addType(Buffer, RTy);
bool isPrototyped = true;
if (Elements.size() == 2 && !Elements[1])
isPrototyped = false;
constructSubprogramArguments(Buffer, Elements);
uint16_t Language = getLanguage();
if (isPrototyped &&
(Language == dwarf::DW_LANG_C89 || Language == dwarf::DW_LANG_C99 ||
Language == dwarf::DW_LANG_ObjC))
addFlag(Buffer, dwarf::DW_AT_prototyped);
if (CTy->isLValueReference())
addFlag(Buffer, dwarf::DW_AT_reference);
if (CTy->isRValueReference())
addFlag(Buffer, dwarf::DW_AT_rvalue_reference);
}
void DwarfUnit::constructTypeDIE(DIE &Buffer, const DICompositeType *CTy) {
if (CTy->isExternalTypeRef()) {
StringRef Identifier = CTy->getIdentifier();
assert(!Identifier.empty() && "external type ref without identifier");
addString(Buffer, dwarf::DW_AT_specification, Identifier);
addFlag(Buffer, dwarf::DW_AT_declaration);
DD->addAccelExternalType(Identifier, CTy->getFilename());
return addDIETypeSignature(Buffer, dwarf::DW_AT_signature, Identifier);
}
StringRef Name = CTy->getName();
uint64_t Size = CTy->getSizeInBits() >> 3;
uint16_t Tag = Buffer.getTag();
switch (Tag) {
case dwarf::DW_TAG_array_type:
constructArrayTypeDIE(Buffer, CTy);
break;
case dwarf::DW_TAG_enumeration_type:
constructEnumTypeDIE(Buffer, CTy);
break;
case dwarf::DW_TAG_structure_type:
case dwarf::DW_TAG_union_type:
case dwarf::DW_TAG_class_type: {
DINodeArray Elements = CTy->getElements();
for (const auto *Element : Elements) {
if (!Element)
continue;
if (auto *SP = dyn_cast<DISubprogram>(Element))
getOrCreateSubprogramDIE(SP);
else if (auto *DDTy = dyn_cast<DIDerivedType>(Element)) {
if (DDTy->getTag() == dwarf::DW_TAG_friend) {
DIE &ElemDie = createAndAddDIE(dwarf::DW_TAG_friend, Buffer);
addType(ElemDie, resolve(DDTy->getBaseType()), dwarf::DW_AT_friend);
} else if (DDTy->isStaticMember()) {
getOrCreateStaticMemberDIE(DDTy);
} else {
constructMemberDIE(Buffer, DDTy);
}
} else if (auto *Property = dyn_cast<DIObjCProperty>(Element)) {
DIE &ElemDie = createAndAddDIE(Property->getTag(), Buffer);
StringRef PropertyName = Property->getName();
addString(ElemDie, dwarf::DW_AT_APPLE_property_name, PropertyName);
if (Property->getType())
addType(ElemDie, resolve(Property->getType()));
addSourceLine(ElemDie, Property);
StringRef GetterName = Property->getGetterName();
if (!GetterName.empty())
addString(ElemDie, dwarf::DW_AT_APPLE_property_getter, GetterName);
StringRef SetterName = Property->getSetterName();
if (!SetterName.empty())
addString(ElemDie, dwarf::DW_AT_APPLE_property_setter, SetterName);
if (unsigned PropertyAttributes = Property->getAttributes())
addUInt(ElemDie, dwarf::DW_AT_APPLE_property_attribute, None,
PropertyAttributes);
}
}
if (CTy->isAppleBlockExtension())
addFlag(Buffer, dwarf::DW_AT_APPLE_block);
if (auto *ContainingType =
dyn_cast_or_null<DICompositeType>(resolve(CTy->getVTableHolder())))
addDIEEntry(Buffer, dwarf::DW_AT_containing_type,
*getOrCreateTypeDIE(ContainingType));
if (CTy->isObjcClassComplete())
addFlag(Buffer, dwarf::DW_AT_APPLE_objc_complete_type);
if (Tag == dwarf::DW_TAG_class_type ||
Tag == dwarf::DW_TAG_structure_type || Tag == dwarf::DW_TAG_union_type)
addTemplateParams(Buffer, CTy->getTemplateParams());
break;
}
default:
break;
}
if (!Name.empty())
addString(Buffer, dwarf::DW_AT_name, Name);
if ((CTy->getRuntimeLang() == dwarf::DW_LANG_Swift ||
CTy->getRuntimeLang() == dwarf::DW_LANG_PLI) &&
CTy->getRawIdentifier())
addString(Buffer, dwarf::DW_AT_linkage_name, CTy->getIdentifier());
if (Tag == dwarf::DW_TAG_enumeration_type ||
Tag == dwarf::DW_TAG_class_type || Tag == dwarf::DW_TAG_structure_type ||
Tag == dwarf::DW_TAG_union_type) {
if (Size)
addUInt(Buffer, dwarf::DW_AT_byte_size, None, Size);
else if (!CTy->isForwardDecl())
addUInt(Buffer, dwarf::DW_AT_byte_size, None, 0);
if (CTy->isForwardDecl())
addFlag(Buffer, dwarf::DW_AT_declaration);
if (!CTy->isForwardDecl())
addSourceLine(Buffer, CTy);
unsigned RLang = CTy->getRuntimeLang();
if (RLang)
addUInt(Buffer, dwarf::DW_AT_APPLE_runtime_class, None, RLang);
}
}
void DwarfUnit::constructTemplateTypeParameterDIE(
DIE &Buffer, const DITemplateTypeParameter *TP) {
DIE &ParamDIE =
createAndAddDIE(dwarf::DW_TAG_template_type_parameter, Buffer);
if (TP->getType())
addType(ParamDIE, resolve(TP->getType()));
if (!TP->getName().empty())
addString(ParamDIE, dwarf::DW_AT_name, TP->getName());
}
void DwarfUnit::constructTemplateValueParameterDIE(
DIE &Buffer, const DITemplateValueParameter *VP) {
DIE &ParamDIE = createAndAddDIE(VP->getTag(), Buffer);
if (VP->getTag() == dwarf::DW_TAG_template_value_parameter)
addType(ParamDIE, resolve(VP->getType()));
if (!VP->getName().empty())
addString(ParamDIE, dwarf::DW_AT_name, VP->getName());
if (Metadata *Val = VP->getValue()) {
if (ConstantInt *CI = mdconst::dyn_extract<ConstantInt>(Val))
addConstantValue(ParamDIE, CI, resolve(VP->getType()));
else if (GlobalValue *GV = mdconst::dyn_extract<GlobalValue>(Val)) {
DIELoc *Loc = new (DIEValueAllocator) DIELoc;
addOpAddress(*Loc, Asm->getSymbol(GV));
addUInt(*Loc, dwarf::DW_FORM_data1, dwarf::DW_OP_stack_value);
addBlock(ParamDIE, dwarf::DW_AT_location, Loc);
} else if (VP->getTag() == dwarf::DW_TAG_GNU_template_template_param) {
assert(isa<MDString>(Val));
addString(ParamDIE, dwarf::DW_AT_GNU_template_name,
cast<MDString>(Val)->getString());
} else if (VP->getTag() == dwarf::DW_TAG_GNU_template_parameter_pack) {
addTemplateParams(ParamDIE, cast<MDTuple>(Val));
}
}
}
DIE *DwarfUnit::getOrCreateNameSpace(const DINamespace *NS) {
DIE *ContextDIE = getOrCreateContextDIE(NS->getScope());
if (DIE *NDie = getDIE(NS))
return NDie;
DIE &NDie = createAndAddDIE(dwarf::DW_TAG_namespace, *ContextDIE, NS);
StringRef Name = NS->getName();
if (!Name.empty())
addString(NDie, dwarf::DW_AT_name, NS->getName());
else
Name = "(anonymous namespace)";
DD->addAccelNamespace(Name, NDie);
addGlobalName(Name, NDie, NS->getScope());
addSourceLine(NDie, NS);
return &NDie;
}
DIE *DwarfUnit::getOrCreateModule(const DIModule *M) {
DIE *ContextDIE = getOrCreateContextDIE(M->getScope());
if (DIE *MDie = getDIE(M))
return MDie;
DIE &MDie = createAndAddDIE(dwarf::DW_TAG_module, *ContextDIE, M);
if (!M->getName().empty()) {
addString(MDie, dwarf::DW_AT_name, M->getName());
addGlobalName(M->getName(), MDie, M->getScope());
}
if (!M->getConfigurationMacros().empty())
addString(MDie, dwarf::DW_AT_LLVM_config_macros,
M->getConfigurationMacros());
if (!M->getIncludePath().empty())
addString(MDie, dwarf::DW_AT_LLVM_include_path, M->getIncludePath());
if (!M->getISysRoot().empty())
addString(MDie, dwarf::DW_AT_LLVM_isysroot, M->getISysRoot());
return &MDie;
}
DIE *DwarfUnit::getOrCreateSubprogramDIE(const DISubprogram *SP, bool Minimal) {
DIE *ContextDIE =
Minimal ? &getUnitDie() : getOrCreateContextDIE(resolve(SP->getScope()));
if (DIE *SPDie = getDIE(SP))
return SPDie;
if (auto *SPDecl = SP->getDeclaration()) {
if (!Minimal) {
ContextDIE = &getUnitDie();
getOrCreateSubprogramDIE(SPDecl);
}
}
DIE &SPDie = createAndAddDIE(dwarf::DW_TAG_subprogram, *ContextDIE, SP);
if (SP->isDefinition()) {
if (CUNode->getEmissionKind() == DIBuilder::ClangModule)
DD->addAccelName(SP->getName(), SPDie);
return &SPDie;
}
applySubprogramAttributes(SP, SPDie);
return &SPDie;
}
bool DwarfUnit::applySubprogramDefinitionAttributes(const DISubprogram *SP,
DIE &SPDie) {
DIE *DeclDie = nullptr;
StringRef DeclLinkageName;
if (auto *SPDecl = SP->getDeclaration()) {
DeclDie = getDIE(SPDecl);
assert(DeclDie && "This DIE should've already been constructed when the "
"definition DIE was created in "
"getOrCreateSubprogramDIE");
DeclLinkageName = SPDecl->getLinkageName();
unsigned DeclID =
getOrCreateSourceID(SPDecl->getFilename(), SPDecl->getDirectory());
unsigned DefID = getOrCreateSourceID(SP->getFilename(), SP->getDirectory());
if (DeclID != DefID)
addUInt(SPDie, dwarf::DW_AT_decl_file, None, DefID);
if (SP->getLine() != SPDecl->getLine())
addUInt(SPDie, dwarf::DW_AT_decl_line, None, SP->getLine());
}
addTemplateParams(SPDie, SP->getTemplateParams());
StringRef LinkageName = SP->getLinkageName();
assert(((LinkageName.empty() || DeclLinkageName.empty()) ||
LinkageName == DeclLinkageName) &&
"decl has a linkage name and it is different");
if (DeclLinkageName.empty())
addLinkageName(SPDie, LinkageName);
if (!DeclDie)
return false;
addDIEEntry(SPDie, dwarf::DW_AT_specification, *DeclDie);
return true;
}
void DwarfUnit::applySubprogramAttributes(const DISubprogram *SP, DIE &SPDie,
bool Minimal) {
if (!Minimal)
if (applySubprogramDefinitionAttributes(SP, SPDie))
return;
if (!SP->getName().empty())
addString(SPDie, dwarf::DW_AT_name, SP->getName());
if (Minimal)
return;
addSourceLine(SPDie, SP);
uint16_t Language = getLanguage();
if (SP->isPrototyped() &&
(Language == dwarf::DW_LANG_C89 || Language == dwarf::DW_LANG_C99 ||
Language == dwarf::DW_LANG_ObjC))
addFlag(SPDie, dwarf::DW_AT_prototyped);
DITypeRefArray Args;
if (const DISubroutineType *SPTy = SP->getType())
Args = SPTy->getTypeArray();
if (Args.size())
if (auto Ty = resolve(Args[0]))
addType(SPDie, Ty);
unsigned VK = SP->getVirtuality();
if (VK) {
addUInt(SPDie, dwarf::DW_AT_virtuality, dwarf::DW_FORM_data1, VK);
DIELoc *Block = getDIELoc();
addUInt(*Block, dwarf::DW_FORM_data1, dwarf::DW_OP_constu);
addUInt(*Block, dwarf::DW_FORM_udata, SP->getVirtualIndex());
addBlock(SPDie, dwarf::DW_AT_vtable_elem_location, Block);
ContainingTypeMap.insert(
std::make_pair(&SPDie, resolve(SP->getContainingType())));
}
if (!SP->isDefinition()) {
addFlag(SPDie, dwarf::DW_AT_declaration);
constructSubprogramArguments(SPDie, Args);
}
if (SP->isArtificial())
addFlag(SPDie, dwarf::DW_AT_artificial);
if (!SP->isLocalToUnit())
addFlag(SPDie, dwarf::DW_AT_external);
if (SP->isOptimized())
addFlag(SPDie, dwarf::DW_AT_APPLE_optimized);
if (unsigned isa = Asm->getISAEncoding())
addUInt(SPDie, dwarf::DW_AT_APPLE_isa, dwarf::DW_FORM_flag, isa);
if (SP->isLValueReference())
addFlag(SPDie, dwarf::DW_AT_reference);
if (SP->isRValueReference())
addFlag(SPDie, dwarf::DW_AT_rvalue_reference);
if (SP->isProtected())
addUInt(SPDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
dwarf::DW_ACCESS_protected);
else if (SP->isPrivate())
addUInt(SPDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
dwarf::DW_ACCESS_private);
else if (SP->isPublic())
addUInt(SPDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
dwarf::DW_ACCESS_public);
if (SP->isExplicit())
addFlag(SPDie, dwarf::DW_AT_explicit);
}
void DwarfUnit::constructSubrangeDIE(DIE &Buffer, const DISubrange *SR,
DIE *IndexTy) {
DIE &DW_Subrange = createAndAddDIE(dwarf::DW_TAG_subrange_type, Buffer);
addDIEEntry(DW_Subrange, dwarf::DW_AT_type, *IndexTy);
int64_t LowerBound = SR->getLowerBound();
int64_t DefaultLowerBound = getDefaultLowerBound();
int64_t Count = SR->getCount();
if (DefaultLowerBound == -1 || LowerBound != DefaultLowerBound)
addUInt(DW_Subrange, dwarf::DW_AT_lower_bound, None, LowerBound);
if (Count != -1)
addUInt(DW_Subrange, dwarf::DW_AT_count, None, Count);
}
DIE *DwarfUnit::getIndexTyDie() {
if (IndexTyDie)
return IndexTyDie;
IndexTyDie = &createAndAddDIE(dwarf::DW_TAG_base_type, UnitDie);
addString(*IndexTyDie, dwarf::DW_AT_name, "sizetype");
addUInt(*IndexTyDie, dwarf::DW_AT_byte_size, None, sizeof(int64_t));
addUInt(*IndexTyDie, dwarf::DW_AT_encoding, dwarf::DW_FORM_data1,
dwarf::DW_ATE_unsigned);
return IndexTyDie;
}
void DwarfUnit::constructArrayTypeDIE(DIE &Buffer, const DICompositeType *CTy) {
if (CTy->isVector())
addFlag(Buffer, dwarf::DW_AT_GNU_vector);
addType(Buffer, resolve(CTy->getBaseType()));
DIE *IdxTy = getIndexTyDie();
DINodeArray Elements = CTy->getElements();
for (unsigned i = 0, N = Elements.size(); i < N; ++i) {
if (auto *Element = dyn_cast_or_null<DINode>(Elements[i]))
if (Element->getTag() == dwarf::DW_TAG_subrange_type)
constructSubrangeDIE(Buffer, cast<DISubrange>(Element), IdxTy);
}
}
void DwarfUnit::constructEnumTypeDIE(DIE &Buffer, const DICompositeType *CTy) {
DINodeArray Elements = CTy->getElements();
for (unsigned i = 0, N = Elements.size(); i < N; ++i) {
auto *Enum = dyn_cast_or_null<DIEnumerator>(Elements[i]);
if (Enum) {
DIE &Enumerator = createAndAddDIE(dwarf::DW_TAG_enumerator, Buffer);
StringRef Name = Enum->getName();
addString(Enumerator, dwarf::DW_AT_name, Name);
int64_t Value = Enum->getValue();
addSInt(Enumerator, dwarf::DW_AT_const_value, dwarf::DW_FORM_sdata,
Value);
}
}
const DIType *DTy = resolve(CTy->getBaseType());
if (DTy) {
addType(Buffer, DTy);
addFlag(Buffer, dwarf::DW_AT_enum_class);
}
}
void DwarfUnit::constructContainingTypeDIEs() {
for (auto CI = ContainingTypeMap.begin(), CE = ContainingTypeMap.end();
CI != CE; ++CI) {
DIE &SPDie = *CI->first;
const DINode *D = CI->second;
if (!D)
continue;
DIE *NDie = getDIE(D);
if (!NDie)
continue;
addDIEEntry(SPDie, dwarf::DW_AT_containing_type, *NDie);
}
}
void DwarfUnit::constructMemberDIE(DIE &Buffer, const DIDerivedType *DT) {
DIE &MemberDie = createAndAddDIE(DT->getTag(), Buffer);
StringRef Name = DT->getName();
if (!Name.empty())
addString(MemberDie, dwarf::DW_AT_name, Name);
addType(MemberDie, resolve(DT->getBaseType()));
addSourceLine(MemberDie, DT);
if (DT->getTag() == dwarf::DW_TAG_inheritance && DT->isVirtual()) {
DIELoc *VBaseLocationDie = new (DIEValueAllocator) DIELoc;
addUInt(*VBaseLocationDie, dwarf::DW_FORM_data1, dwarf::DW_OP_dup);
addUInt(*VBaseLocationDie, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);
addUInt(*VBaseLocationDie, dwarf::DW_FORM_data1, dwarf::DW_OP_constu);
addUInt(*VBaseLocationDie, dwarf::DW_FORM_udata, DT->getOffsetInBits());
addUInt(*VBaseLocationDie, dwarf::DW_FORM_data1, dwarf::DW_OP_minus);
addUInt(*VBaseLocationDie, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);
addUInt(*VBaseLocationDie, dwarf::DW_FORM_data1, dwarf::DW_OP_plus);
addBlock(MemberDie, dwarf::DW_AT_data_member_location, VBaseLocationDie);
} else {
uint64_t Size = DT->getSizeInBits();
uint64_t FieldSize = getBaseTypeSize(DD, DT);
uint64_t OffsetInBytes;
if (FieldSize && Size != FieldSize) {
addUInt(MemberDie, dwarf::DW_AT_byte_size, None, FieldSize/8);
addUInt(MemberDie, dwarf::DW_AT_bit_size, None, Size);
uint64_t Offset = DT->getOffsetInBits();
uint64_t Align = DT->getAlignInBits() ? DT->getAlignInBits() : FieldSize;
uint64_t AlignMask = ~(Align - 1);
uint64_t StartBitOffset = Offset - (Offset & AlignMask);
uint64_t DwarfBitOffset = Asm->getDataLayout().isLittleEndian()
? OffsetToAlignment(Offset + Size, Align)
: StartBitOffset;
OffsetInBytes = (Offset - StartBitOffset) / 8;
addUInt(MemberDie, dwarf::DW_AT_bit_offset, None, DwarfBitOffset);
} else
OffsetInBytes = DT->getOffsetInBits() / 8;
if (DD->getDwarfVersion() <= 2) {
DIELoc *MemLocationDie = new (DIEValueAllocator) DIELoc;
addUInt(*MemLocationDie, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst);
addUInt(*MemLocationDie, dwarf::DW_FORM_udata, OffsetInBytes);
addBlock(MemberDie, dwarf::DW_AT_data_member_location, MemLocationDie);
} else
addUInt(MemberDie, dwarf::DW_AT_data_member_location, None,
OffsetInBytes);
}
if (DT->isProtected())
addUInt(MemberDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
dwarf::DW_ACCESS_protected);
else if (DT->isPrivate())
addUInt(MemberDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
dwarf::DW_ACCESS_private);
else if (DT->isPublic())
addUInt(MemberDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
dwarf::DW_ACCESS_public);
if (DT->isVirtual())
addUInt(MemberDie, dwarf::DW_AT_virtuality, dwarf::DW_FORM_data1,
dwarf::DW_VIRTUALITY_virtual);
if (DINode *PNode = DT->getObjCProperty())
if (DIE *PDie = getDIE(PNode))
MemberDie.addValue(DIEValueAllocator, dwarf::DW_AT_APPLE_property,
dwarf::DW_FORM_ref4, DIEEntry(*PDie));
if (DT->isArtificial())
addFlag(MemberDie, dwarf::DW_AT_artificial);
}
DIE *DwarfUnit::getOrCreateStaticMemberDIE(const DIDerivedType *DT) {
if (!DT)
return nullptr;
DIE *ContextDIE = getOrCreateContextDIE(resolve(DT->getScope()));
assert(dwarf::isType(ContextDIE->getTag()) &&
"Static member should belong to a type.");
if (DIE *StaticMemberDIE = getDIE(DT))
return StaticMemberDIE;
DIE &StaticMemberDIE = createAndAddDIE(DT->getTag(), *ContextDIE, DT);
const DIType *Ty = resolve(DT->getBaseType());
addString(StaticMemberDIE, dwarf::DW_AT_name, DT->getName());
addType(StaticMemberDIE, Ty);
addSourceLine(StaticMemberDIE, DT);
addFlag(StaticMemberDIE, dwarf::DW_AT_external);
addFlag(StaticMemberDIE, dwarf::DW_AT_declaration);
if (DT->isProtected())
addUInt(StaticMemberDIE, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
dwarf::DW_ACCESS_protected);
else if (DT->isPrivate())
addUInt(StaticMemberDIE, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
dwarf::DW_ACCESS_private);
else if (DT->isPublic())
addUInt(StaticMemberDIE, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
dwarf::DW_ACCESS_public);
if (const ConstantInt *CI = dyn_cast_or_null<ConstantInt>(DT->getConstant()))
addConstantValue(StaticMemberDIE, CI, Ty);
if (const ConstantFP *CFP = dyn_cast_or_null<ConstantFP>(DT->getConstant()))
addConstantFPValue(StaticMemberDIE, CFP);
return &StaticMemberDIE;
}
void DwarfUnit::emitHeader(bool UseOffsets) {
Asm->OutStreamer->AddComment("Length of Unit");
Asm->EmitInt32(getHeaderSize() + UnitDie.getSize());
Asm->OutStreamer->AddComment("DWARF version number");
Asm->EmitInt16(DD->getDwarfVersion());
Asm->OutStreamer->AddComment("Offset Into Abbrev. Section");
const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering();
Asm->emitDwarfSymbolReference(TLOF.getDwarfAbbrevSection()->getBeginSymbol(),
UseOffsets);
Asm->OutStreamer->AddComment("Address Size (in bytes)");
Asm->EmitInt8(Asm->getDataLayout().getPointerSize());
}
void DwarfUnit::initSection(MCSection *Section) {
assert(!this->Section);
this->Section = Section;
}
void DwarfTypeUnit::emitHeader(bool UseOffsets) {
DwarfUnit::emitHeader(UseOffsets);
Asm->OutStreamer->AddComment("Type Signature");
Asm->OutStreamer->EmitIntValue(TypeSignature, sizeof(TypeSignature));
Asm->OutStreamer->AddComment("Type DIE Offset");
Asm->OutStreamer->EmitIntValue(Ty ? Ty->getOffset() : 0,
sizeof(Ty->getOffset()));
}
bool DwarfTypeUnit::isDwoUnit() const {
return DD->useSplitDwarf();
}