| //===-- DWARFAttribute.cpp ------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "DWARFAttribute.h" |
| #include "DWARFUnit.h" |
| #include "DWARFDebugInfo.h" |
| |
| DWARFAttributes::DWARFAttributes() : m_infos() {} |
| |
| DWARFAttributes::~DWARFAttributes() = default; |
| |
| uint32_t DWARFAttributes::FindAttributeIndex(dw_attr_t attr) const { |
| collection::const_iterator end = m_infos.end(); |
| collection::const_iterator beg = m_infos.begin(); |
| collection::const_iterator pos; |
| for (pos = beg; pos != end; ++pos) { |
| if (pos->attr.get_attr() == attr) |
| return std::distance(beg, pos); |
| } |
| return UINT32_MAX; |
| } |
| |
| void DWARFAttributes::Append(const DWARFFormValue &form_value, |
| dw_offset_t attr_die_offset, dw_attr_t attr) { |
| AttributeValue attr_value = {const_cast<DWARFUnit *>(form_value.GetUnit()), |
| attr_die_offset, |
| {attr, form_value.Form(), form_value.Value()}}; |
| m_infos.push_back(attr_value); |
| } |
| |
| bool DWARFAttributes::ExtractFormValueAtIndex( |
| uint32_t i, DWARFFormValue &form_value) const { |
| const DWARFUnit *cu = CompileUnitAtIndex(i); |
| form_value.SetUnit(cu); |
| form_value.SetForm(FormAtIndex(i)); |
| if (form_value.Form() == DW_FORM_implicit_const) { |
| form_value.SetValue(ValueAtIndex(i)); |
| return true; |
| } |
| lldb::offset_t offset = DIEOffsetAtIndex(i); |
| return form_value.ExtractValue(cu->GetData(), &offset); |
| } |
| |
| DWARFDIE |
| DWARFAttributes::FormValueAsReference(dw_attr_t attr) const { |
| const uint32_t attr_idx = FindAttributeIndex(attr); |
| if (attr_idx != UINT32_MAX) |
| return FormValueAsReferenceAtIndex(attr_idx); |
| return {}; |
| } |
| |
| DWARFDIE |
| DWARFAttributes::FormValueAsReferenceAtIndex(uint32_t i) const { |
| DWARFFormValue form_value; |
| if (ExtractFormValueAtIndex(i, form_value)) |
| return form_value.Reference(); |
| return {}; |
| } |