/// 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;
}
