]> CyberLeo.Net >> Repos - FreeBSD/FreeBSD.git/blob - contrib/llvm-project/lldb/source/Plugins/SymbolFile/DWARF/DWARFAttribute.cpp
MFC r355940:
[FreeBSD/FreeBSD.git] / contrib / llvm-project / lldb / source / Plugins / SymbolFile / DWARF / DWARFAttribute.cpp
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
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 }