示例#1
0
OperatingSystemGo::Goroutine
OperatingSystemGo::CreateGoroutineAtIndex(uint64_t idx, Error &err)
{
    err.Clear();
    Goroutine result;
    ValueObjectSP g = m_allg_sp->GetSyntheticArrayMember(idx, true)->Dereference(err);
    if (err.Fail())
    {
        return result;
    }

    ConstString name("goid");
    ValueObjectSP val = g->GetChildMemberWithName(name, true);
    bool success = false;
    result.m_goid = val->GetValueAsUnsigned(0, &success);
    if (!success)
    {
        err.SetErrorToGenericError();
        err.SetErrorString("unable to read goid");
        return result;
    }
    name.SetCString("atomicstatus");
    val = g->GetChildMemberWithName(name, true);
    result.m_status = (uint32_t)val->GetValueAsUnsigned(0, &success);
    if (!success)
    {
        err.SetErrorToGenericError();
        err.SetErrorString("unable to read atomicstatus");
        return result;
    }
    name.SetCString("sched");
    val = g->GetChildMemberWithName(name, true);
    result.m_gobuf = val->GetAddressOf(false);
    name.SetCString("stack");
    val = g->GetChildMemberWithName(name, true);
    name.SetCString("lo");
    ValueObjectSP child = val->GetChildMemberWithName(name, true);
    result.m_lostack = child->GetValueAsUnsigned(0, &success);
    if (!success)
    {
        err.SetErrorToGenericError();
        err.SetErrorString("unable to read stack.lo");
        return result;
    }
    name.SetCString("hi");
    child = val->GetChildMemberWithName(name, true);
    result.m_histack = child->GetValueAsUnsigned(0, &success);
    if (!success)
    {
        err.SetErrorToGenericError();
        err.SetErrorString("unable to read stack.hi");
        return result;
    }
    return result;
}
ValueObjectSP
GoUserExpression::GoInterpreter::VisitIndexExpr(const lldb_private::GoASTIndexExpr *e)
{
    ValueObjectSP target = EvaluateExpr(e->GetX());
    if (!target)
        return nullptr;
    ValueObjectSP index = EvaluateExpr(e->GetIndex());
    if (!index)
        return nullptr;
    bool is_signed;
    if (!index->GetCompilerType().IsIntegerType(is_signed))
    {
        m_error.SetErrorString("Unsupported index");
        return nullptr;
    }
    size_t idx;
    if (is_signed)
        idx = index->GetValueAsSigned(0);
    else
        idx = index->GetValueAsUnsigned(0);
    if (GoASTContext::IsGoSlice(target->GetCompilerType()))
    {
        target = target->GetStaticValue();
        ValueObjectSP cap = target->GetChildMemberWithName(ConstString("cap"), true);
        if (cap)
        {
            uint64_t capval = cap->GetValueAsUnsigned(0);
            if (idx >= capval)
            {
                m_error.SetErrorStringWithFormat("Invalid index %" PRIu64 " , cap = %" PRIu64, uint64_t(idx), capval);
                return nullptr;
            }
        }
        target = target->GetChildMemberWithName(ConstString("array"), true);
        if (target && m_use_dynamic != eNoDynamicValues)
        {
            ValueObjectSP dynamic = target->GetDynamicValue(m_use_dynamic);
            if (dynamic)
                target = dynamic;
        }
        if (!target)
            return nullptr;
        return target->GetSyntheticArrayMember(idx, true);
    }
    return target->GetChildAtIndex(idx, true);
}
ValueObjectSP BitsetFrontEnd::GetChildAtIndex(size_t idx) {
  if (idx >= m_elements.size() || !m_first)
    return ValueObjectSP();

  if (m_elements[idx])
    return m_elements[idx];

  ExecutionContext ctx = m_backend.GetExecutionContextRef().Lock(false);
  CompilerType type;
  ValueObjectSP chunk;
  // For small bitsets __first_ is not an array, but a plain size_t.
  if (m_first->GetCompilerType().IsArrayType(&type, nullptr, nullptr)) {
    llvm::Optional<uint64_t> bit_size =
        type.GetBitSize(ctx.GetBestExecutionContextScope());
    if (!bit_size || *bit_size == 0)
      return {};
    chunk = m_first->GetChildAtIndex(idx / *bit_size, true);
  } else {
    type = m_first->GetCompilerType();
    chunk = m_first;
  }
  if (!type || !chunk)
    return {};

  llvm::Optional<uint64_t> bit_size =
      type.GetBitSize(ctx.GetBestExecutionContextScope());
  if (!bit_size || *bit_size == 0)
    return {};
  size_t chunk_idx = idx % *bit_size;
  uint8_t value = !!(chunk->GetValueAsUnsigned(0) & (uint64_t(1) << chunk_idx));
  DataExtractor data(&value, sizeof(value), m_byte_order, m_byte_size);

  m_elements[idx] = CreateValueObjectFromData(llvm::formatv("[{0}]", idx).str(),
                                              data, ctx, m_bool_type);

  return m_elements[idx];
}