DWARFExpression lldb_private::npdb::MakeConstantLocationExpression(
    TypeIndex underlying_ti, TpiStream &tpi, const llvm::APSInt &constant,
    ModuleSP module) {
  const ArchSpec &architecture = module->GetArchitecture();
  uint32_t address_size = architecture.GetAddressByteSize();

  size_t size = 0;
  bool is_signed = false;
  std::tie(size, is_signed) = GetIntegralTypeInfo(underlying_ti, tpi);

  union {
    llvm::support::little64_t I;
    llvm::support::ulittle64_t U;
  } Value;

  std::shared_ptr<DataBufferHeap> buffer = std::make_shared<DataBufferHeap>();
  buffer->SetByteSize(size);

  llvm::ArrayRef<uint8_t> bytes;
  if (is_signed) {
    Value.I = constant.getSExtValue();
  } else {
    Value.U = constant.getZExtValue();
  }

  bytes = llvm::makeArrayRef(reinterpret_cast<const uint8_t *>(&Value), 8)
              .take_front(size);
  buffer->CopyData(bytes.data(), size);
  DataExtractor extractor(buffer, lldb::eByteOrderLittle, address_size);
  DWARFExpression result(nullptr, extractor, nullptr, 0, size);
  return result;
}
示例#2
0
bool LiteralAnalyser::checkRange(QualType TLeft, const Expr* Right, clang::SourceLocation Loc, llvm::APSInt Result) {
    // TODO refactor with check()
    const QualType QT = TLeft.getCanonicalType();
    int availableWidth = 0;
    if (QT.isBuiltinType()) {
        const BuiltinType* TL = cast<BuiltinType>(QT);
        if (!TL->isInteger()) {
            // TODO floats
            return false;
        }
        availableWidth = TL->getIntegerWidth();
    } else {
        QT.dump();
        assert(0 && "todo");
    }

    const Limit* L = getLimit(availableWidth);
    assert(Result.isSigned() && "TEMP FOR NOW");
    int64_t value = Result.getSExtValue();
    bool overflow = false;
    if (Result.isNegative()) {
        const int64_t limit = L->minVal;
        if (value < limit) overflow = true;
    } else {
        const int64_t limit = (int64_t)L->maxVal;
        if (value > limit) overflow = true;
    }
    //fprintf(stderr, "VAL=%lld  width=%d signed=%d\n", value, availableWidth, Result.isSigned());
    if (overflow) {
        SmallString<20> ss;
        Result.toString(ss, 10, true);

        StringBuilder buf1;
        TLeft->DiagName(buf1);

        if (Right) {
            Diags.Report(Right->getLocStart(), diag::err_literal_outofbounds)
                    << buf1 << L->minStr << L->maxStr << ss << Right->getSourceRange();
        } else {
            Diags.Report(Loc, diag::err_literal_outofbounds)
                    << buf1 << L->minStr << L->maxStr << ss;
        }
        return false;
    }
    return true;
}