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 
17 namespace lldb_private::plugin {
18 namespace dwarf {
19 class DWARFUnit;
20 
21 class DWARFAttribute {
22 public:
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 
37 protected:
38   dw_attr_t m_attr;
39   dw_form_t m_form;
40   DWARFFormValue::ValueType m_value;
41 };
42 
43 class DWARFAttributes {
44 public:
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 
68 protected:
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