lldb/source/Plugins/SymbolFile/DWARF/DWARFAttribute.h

   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