1//===-- DWARFAttribute.cpp --------------------------------------*- C++ -*-===// 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-exception 6// 7//===----------------------------------------------------------------------===// 8 9#include "DWARFAttribute.h" 10#include "DWARFUnit.h" 11#include "DWARFDebugInfo.h" 12 13DWARFAttributes::DWARFAttributes() : m_infos() {} 14 15DWARFAttributes::~DWARFAttributes() {} 16 17uint32_t DWARFAttributes::FindAttributeIndex(dw_attr_t attr) const { 18 collection::const_iterator end = m_infos.end(); 19 collection::const_iterator beg = m_infos.begin(); 20 collection::const_iterator pos; 21 for (pos = beg; pos != end; ++pos) { 22 if (pos->attr.get_attr() == attr) 23 return std::distance(beg, pos); 24 } 25 return UINT32_MAX; 26} 27 28void DWARFAttributes::Append(const DWARFUnit *cu, dw_offset_t attr_die_offset, 29 dw_attr_t attr, dw_form_t form) { 30 AttributeValue attr_value = { 31 cu, attr_die_offset, {attr, form, DWARFFormValue::ValueType()}}; 32 m_infos.push_back(attr_value); 33} 34 35bool DWARFAttributes::ExtractFormValueAtIndex( 36 uint32_t i, DWARFFormValue &form_value) const { 37 const DWARFUnit *cu = CompileUnitAtIndex(i); 38 form_value.SetUnit(cu); 39 form_value.SetForm(FormAtIndex(i)); 40 lldb::offset_t offset = DIEOffsetAtIndex(i); 41 return form_value.ExtractValue(cu->GetData(), &offset); 42} 43 44DWARFDIE 45DWARFAttributes::FormValueAsReference(dw_attr_t attr) const { 46 const uint32_t attr_idx = FindAttributeIndex(attr); 47 if (attr_idx != UINT32_MAX) 48 return FormValueAsReferenceAtIndex(attr_idx); 49 return {}; 50} 51 52DWARFDIE 53DWARFAttributes::FormValueAsReferenceAtIndex(uint32_t i) const { 54 DWARFFormValue form_value; 55 if (ExtractFormValueAtIndex(i, form_value)) 56 return form_value.Reference(); 57 return {}; 58} 59