/// constructTypeDIE - Construct derived type die from DIDerivedType. void CompileUnit::constructTypeDIE(DIE &Buffer, DIDerivedType DTy) { // Get core information. StringRef Name = DTy.getName(); uint64_t Size = DTy.getSizeInBits() >> 3; unsigned Tag = DTy.getTag(); // FIXME - Workaround for templates. if (Tag == dwarf::DW_TAG_inheritance) Tag = dwarf::DW_TAG_reference_type; Buffer.setTag(Tag); // Map to main type, void will not have a type. DIType FromTy = DTy.getTypeDerivedFrom(); addType(&Buffer, FromTy); // Add name if not anonymous or intermediate type. if (!Name.empty()) addString(&Buffer, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name); // Add size if non-zero (derived types might be zero-sized.) if (Size) addUInt(&Buffer, dwarf::DW_AT_byte_size, 0, Size); // Add source line info if available and TyDesc is not a forward declaration. if (!DTy.isForwardDecl()) addSourceLine(&Buffer, DTy); }
/// If this type is derived from a base type then return base type size. uint64_t DebugHandlerBase::getBaseTypeSize(const DITypeRef TyRef) { DIType *Ty = TyRef.resolve(); assert(Ty); DIDerivedType *DDTy = dyn_cast<DIDerivedType>(Ty); if (!DDTy) return Ty->getSizeInBits(); unsigned Tag = DDTy->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 && Tag != dwarf::DW_TAG_atomic_type) return DDTy->getSizeInBits(); DIType *BaseType = DDTy->getBaseType().resolve(); assert(BaseType && "Unexpected invalid base type"); // If this is a derived type, go ahead and get the base type, unless it's a // reference then it's just the size of the field. Pointer types have no need // of this since they're a different type of qualification on the type. if (BaseType->getTag() == dwarf::DW_TAG_reference_type || BaseType->getTag() == dwarf::DW_TAG_rvalue_reference_type) return Ty->getSizeInBits(); return getBaseTypeSize(BaseType); }
BitFieldAggregation *BitFieldAggregation::getBitFieldAggregation(TYPECONST Type *type, const EDIType *aEDIType, bool returnOnError, unsigned typeIndex, unsigned EDITypeIndex, unsigned lastTypeIndex, unsigned lastEDITypeIndex, unsigned counter) { static BitFieldAggregation bfa; TYPECONST Type *containedType = type->getContainedType(typeIndex); unsigned typeBits = TypeUtil::typeToBits(containedType); assert(typeBits > 0); unsigned nextTypeBits = 0; if (typeIndex < lastTypeIndex) { nextTypeBits = TypeUtil::typeToBits(type->getContainedType(typeIndex+1)); } const int maxNumMembers = (lastEDITypeIndex - EDITypeIndex) - (lastTypeIndex - typeIndex) + 1; unsigned index = EDITypeIndex; std::vector<DIDerivedType> members; std::vector<EDIType> containedEDITypes; BitFieldAggregation_assert_or_return(returnOnError, NULL, type, aEDIType, maxNumMembers > 0); #if DEBUG_BFA BitFieldAggregationErr("getBitFieldAggregation(): typeIndex = " << typeIndex << ", EDITypeIndex = " << EDITypeIndex << ", maxNumMembers = " << maxNumMembers); BitFieldAggregationErr("getBitFieldAggregation(): lastTypeIndex = " << lastTypeIndex << ", lastEDITypeIndex = " << lastEDITypeIndex); BitFieldAggregationErr("getBitFieldAggregation(): " << TypeUtil::getDescription(type) << " VS " << TypeUtil::getDescription(aEDIType)); #endif while(index <= lastEDITypeIndex && members.size() < (unsigned)maxNumMembers) { const EDIType containedEDIType = aEDIType->getContainedType(index); #if DEBUG_BFA BitFieldAggregationErr("Examining type " << TypeUtil::getDescription(&containedEDIType)); #endif BitFieldAggregation_assert_or_return(returnOnError, NULL, type, aEDIType, containedEDIType.isIntegerTy()); DIDerivedType member = aEDIType->getMember(index); unsigned EDITypeBits = member.getSizeInBits(); #if DEBUG_BFA BitFieldAggregationErr("Type bits = " << typeBits << ", next type bits = " << nextTypeBits << ", index = " << index); BitFieldAggregationErr("This is member " << member.getName() << " with bits " << EDITypeBits); #endif if((index > EDITypeIndex && EDITypeBits == nextTypeBits) || EDITypeBits > typeBits) { break; } typeBits -= EDITypeBits; members.push_back(member); containedEDITypes.push_back(containedEDIType); index++; } bfa.init(containedType, containedEDITypes, typeIndex, EDITypeIndex, members, counter); return &bfa; }