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-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "DWARFAttribute.h" 10 #include "DWARFUnit.h" 11 #include "DWARFDebugInfo.h" 12 13 DWARFAttributes::DWARFAttributes() : m_infos() {} 14 15 DWARFAttributes::~DWARFAttributes() {} 16 17 uint32_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 28 void 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 35 bool 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 44 DWARFDIE 45 DWARFAttributes::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 52 DWARFDIE 53 DWARFAttributes::FormValueAsReferenceAtIndex(uint32_t i) const { 54 DWARFFormValue form_value; 55 if (ExtractFormValueAtIndex(i, form_value)) 56 return form_value.Reference(); 57 return {}; 58 } 59