67 lines · cpp
1//===-- DWARFAttribute.cpp ------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#include "DWARFAttribute.h"10#include "DWARFUnit.h"11#include "DWARFDebugInfo.h"12 13using namespace llvm::dwarf;14using namespace lldb_private::plugin::dwarf;15 16DWARFAttributes::DWARFAttributes() : m_infos() {}17 18DWARFAttributes::~DWARFAttributes() = default;19 20uint32_t DWARFAttributes::FindAttributeIndex(dw_attr_t attr) const {21 collection::const_iterator end = m_infos.end();22 collection::const_iterator beg = m_infos.begin();23 collection::const_iterator pos;24 for (pos = beg; pos != end; ++pos) {25 if (pos->attr.get_attr() == attr)26 return std::distance(beg, pos);27 }28 return UINT32_MAX;29}30 31void DWARFAttributes::Append(const DWARFFormValue &form_value,32 dw_offset_t attr_die_offset, dw_attr_t attr) {33 AttributeValue attr_value = {const_cast<DWARFUnit *>(form_value.GetUnit()),34 attr_die_offset,35 {attr, form_value.Form(), form_value.Value()}};36 m_infos.push_back(attr_value);37}38 39bool DWARFAttributes::ExtractFormValueAtIndex(40 uint32_t i, DWARFFormValue &form_value) const {41 const DWARFUnit *cu = CompileUnitAtIndex(i);42 form_value.SetUnit(cu);43 form_value.SetForm(FormAtIndex(i));44 if (form_value.Form() == DW_FORM_implicit_const) {45 form_value.SetValue(ValueAtIndex(i));46 return true;47 }48 lldb::offset_t offset = DIEOffsetAtIndex(i);49 return form_value.ExtractValue(cu->GetData(), &offset);50}51 52DWARFDIE53DWARFAttributes::FormValueAsReference(dw_attr_t attr) const {54 const uint32_t attr_idx = FindAttributeIndex(attr);55 if (attr_idx != UINT32_MAX)56 return FormValueAsReferenceAtIndex(attr_idx);57 return {};58}59 60DWARFDIE61DWARFAttributes::FormValueAsReferenceAtIndex(uint32_t i) const {62 DWARFFormValue form_value;63 if (ExtractFormValueAtIndex(i, form_value))64 return form_value.Reference();65 return {};66}67