contrib/llvm/tools/lldb/source/Plugins/SymbolFile/DWARF/DWARFFormValue.h

   1 //===-- DWARFFormValue.h ----------------------------------------*- C++ -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #ifndef SymbolFileDWARF_DWARFFormValue_h_
  11 #define SymbolFileDWARF_DWARFFormValue_h_
  12
  13 #include <stddef.h> // for NULL
  14
  15 class DWARFCompileUnit;
  16
  17 class DWARFFormValue
  18 {
  19 public:
  20     typedef struct ValueTypeTag
  21     {
  22         ValueTypeTag() :
  23             value(),
  24             data(NULL)
  25         {
  26             value.uval = 0;
  27         }
  28
  29         union
  30         {
  31             uint64_t uval;
  32             int64_t sval;
  33             const char* cstr;
  34         } value;
  35         const uint8_t* data;
  36     } ValueType;
  37
  38     enum
  39     {
  40         eValueTypeInvalid = 0,
  41         eValueTypeUnsigned,
  42         eValueTypeSigned,
  43         eValueTypeCStr,
  44         eValueTypeBlock
  45     };
  46
  47     DWARFFormValue(dw_form_t form = 0);
  48     dw_form_t           Form()  const { return m_form; }
  49     void                SetForm(dw_form_t form) { m_form = form; }
  50     const ValueType&    Value() const { return m_value; }
  51     void                Dump(lldb_private::Stream &s, const lldb_private::DataExtractor* debug_str_data, const DWARFCompileUnit* cu) const;
  52     bool                ExtractValue(const lldb_private::DataExtractor& data,
  53                                      lldb::offset_t* offset_ptr,
  54                                      const DWARFCompileUnit* cu);
  55     bool                IsInlinedCStr() const { return (m_value.data != NULL) && m_value.data == (uint8_t*)m_value.value.cstr; }
  56     const uint8_t*      BlockData() const;
  57     uint64_t            Reference(const DWARFCompileUnit* cu) const;
  58     uint64_t            Reference (dw_offset_t offset) const;
  59     bool                ResolveCompileUnitReferences(const DWARFCompileUnit* cu);
  60     bool                Boolean() const { return m_value.value.uval != 0; }
  61     uint64_t            Unsigned() const { return m_value.value.uval; }
  62     void                SetUnsigned(uint64_t uval) { m_value.value.uval = uval; }
  63     int64_t             Signed() const { return m_value.value.sval; }
  64     void                SetSigned(int64_t sval) { m_value.value.sval = sval; }
  65     const char*         AsCString(const lldb_private::DataExtractor* debug_str_data_ptr) const;
  66     bool                SkipValue(const lldb_private::DataExtractor& debug_info_data, lldb::offset_t *offset_ptr, const DWARFCompileUnit* cu) const;
  67     static bool         SkipValue(const dw_form_t form, const lldb_private::DataExtractor& debug_info_data, lldb::offset_t *offset_ptr, const DWARFCompileUnit* cu);
  68 //  static bool         TransferValue(dw_form_t form, const lldb_private::DataExtractor& debug_info_data, lldb::offset_t *offset_ptr, const DWARFCompileUnit* cu, BinaryStreamBuf& out_buff);
  69 //  static bool         TransferValue(const DWARFFormValue& formValue, const DWARFCompileUnit* cu, BinaryStreamBuf& out_buff);
  70 //  static bool         PutUnsigned(dw_form_t form, dw_offset_t offset, uint64_t value, BinaryStreamBuf& out_buff, const DWARFCompileUnit* cu, bool fixup_cu_relative_refs);
  71     static bool         IsBlockForm(const dw_form_t form);
  72     static bool         IsDataForm(const dw_form_t form);
  73     static const uint8_t * GetFixedFormSizesForAddressSize (uint8_t addr_size);
  74     static int          Compare (const DWARFFormValue& a, const DWARFFormValue& b, const DWARFCompileUnit* a_cu, const DWARFCompileUnit* b_cu, const lldb_private::DataExtractor* debug_str_data_ptr);
  75 protected:
  76     dw_form_t   m_form;     // Form for this value
  77     ValueType   m_value;    // Contains all data for the form
  78 };
  79
  80
  81 #endif  // SymbolFileDWARF_DWARFFormValue_h_