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     {
ValueTypeTagValueTypeTag22         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);
Form()48     dw_form_t           Form()  const { return m_form; }
SetForm(dw_form_t form)49     void                SetForm(dw_form_t form) { m_form = form; }
Value()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);
IsInlinedCStr()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);
Boolean()60     bool                Boolean() const { return m_value.value.uval != 0; }
Unsigned()61     uint64_t            Unsigned() const { return m_value.value.uval; }
SetUnsigned(uint64_t uval)62     void                SetUnsigned(uint64_t uval) { m_value.value.uval = uval; }
Signed()63     int64_t             Signed() const { return m_value.value.sval; }
SetSigned(int64_t 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_
82