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
DWARFAttributes()13 DWARFAttributes::DWARFAttributes() : m_infos() {}
14
~DWARFAttributes()15 DWARFAttributes::~DWARFAttributes() {}
16
FindAttributeIndex(dw_attr_t attr) const17 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
Append(DWARFUnit * cu,dw_offset_t attr_die_offset,dw_attr_t attr,dw_form_t form)28 void DWARFAttributes::Append(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
ExtractFormValueAtIndex(uint32_t i,DWARFFormValue & form_value) const35 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
FormValueAsReference(dw_attr_t attr) const45 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
FormValueAsReferenceAtIndex(uint32_t i) const53 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