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