void DbiModuleDescriptorBuilder::addSymbol(CVSymbol Symbol) {
Symbols.push_back(Symbol);
// Symbols written to a PDB file are required to be 4 byte aligned. The same
// is not true of object files.
assert(Symbol.length() % alignOf(CodeViewContainer::Pdb) == 0 &&
"Invalid Symbol alignment!");
SymbolByteSize += Symbol.length();
}
/// Copy the symbol record. In a PDB, symbol records must be 4 byte aligned.
/// The object file may not be aligned.
static MutableArrayRef<uint8_t> copySymbolForPdb(const CVSymbol &Sym,
BumpPtrAllocator &Alloc) {
size_t Size = alignTo(Sym.length(), alignOf(CodeViewContainer::Pdb));
assert(Size >= 4 && "record too short");
assert(Size <= MaxRecordLength && "record too long");
void *Mem = Alloc.Allocate(Size, 4);
// Copy the symbol record and zero out any padding bytes.
MutableArrayRef<uint8_t> NewData(reinterpret_cast<uint8_t *>(Mem), Size);
memcpy(NewData.data(), Sym.data().data(), Sym.length());
memset(NewData.data() + Sym.length(), 0, Size - Sym.length());
// Update the record prefix length. It should point to the beginning of the
// next record. MSVC does some canonicalization of the record kind, so we do
// that as well.
auto *Prefix = reinterpret_cast<RecordPrefix *>(Mem);
Prefix->RecordKind = canonicalizeSymbolKind(Sym.kind());
Prefix->RecordLen = Size - 2;
return NewData;
}
Error CVSymbolDumperImpl::visitUnknownSymbol(CVSymbol &CVR) {
W.printNumber("Length", CVR.length());
return Error::success();
}