1//===-- DWARFAttribute.h ----------------------------------------*- 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#ifndef LLDB_SOURCE_PLUGINS_SYMBOLFILE_DWARF_DWARFATTRIBUTE_H
10#define LLDB_SOURCE_PLUGINS_SYMBOLFILE_DWARF_DWARFATTRIBUTE_H
11
12#include "DWARFDefines.h"
13#include "DWARFFormValue.h"
14#include "llvm/ADT/SmallVector.h"
15#include <vector>
16
17namespace lldb_private::plugin {
18namespace dwarf {
19class DWARFUnit;
20
21class DWARFAttribute {
22public:
23  DWARFAttribute(dw_attr_t attr, dw_form_t form,
24                 DWARFFormValue::ValueType value)
25      : m_attr(attr), m_form(form), m_value(value) {}
26
27  dw_attr_t get_attr() const { return m_attr; }
28  dw_form_t get_form() const { return m_form; }
29  DWARFFormValue::ValueType get_value() const { return m_value; }
30  void get(dw_attr_t &attr, dw_form_t &form,
31           DWARFFormValue::ValueType &val) const {
32    attr = m_attr;
33    form = m_form;
34    val = m_value;
35  }
36
37protected:
38  dw_attr_t m_attr;
39  dw_form_t m_form;
40  DWARFFormValue::ValueType m_value;
41};
42
43class DWARFAttributes {
44public:
45  DWARFAttributes();
46  ~DWARFAttributes();
47
48  void Append(const DWARFFormValue &form_value, dw_offset_t attr_die_offset,
49              dw_attr_t attr);
50  DWARFUnit *CompileUnitAtIndex(uint32_t i) const { return m_infos[i].cu; }
51  dw_offset_t DIEOffsetAtIndex(uint32_t i) const {
52    return m_infos[i].die_offset;
53  }
54  dw_attr_t AttributeAtIndex(uint32_t i) const {
55    return m_infos[i].attr.get_attr();
56  }
57  dw_form_t FormAtIndex(uint32_t i) const { return m_infos[i].attr.get_form(); }
58  DWARFFormValue::ValueType ValueAtIndex(uint32_t i) const {
59    return m_infos[i].attr.get_value();
60  }
61  bool ExtractFormValueAtIndex(uint32_t i, DWARFFormValue &form_value) const;
62  DWARFDIE FormValueAsReferenceAtIndex(uint32_t i) const;
63  DWARFDIE FormValueAsReference(dw_attr_t attr) const;
64  uint32_t FindAttributeIndex(dw_attr_t attr) const;
65  void Clear() { m_infos.clear(); }
66  size_t Size() const { return m_infos.size(); }
67
68protected:
69  struct AttributeValue {
70    DWARFUnit *cu; // Keep the compile unit with each attribute in
71                   // case we have DW_FORM_ref_addr values
72    dw_offset_t die_offset;
73    DWARFAttribute attr;
74  };
75  typedef llvm::SmallVector<AttributeValue, 8> collection;
76  collection m_infos;
77};
78} // namespace dwarf
79} // namespace lldb_private::plugin
80
81#endif // LLDB_SOURCE_PLUGINS_SYMBOLFILE_DWARF_DWARFATTRIBUTE_H
82