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