]> CyberLeo.Net >> Repos - FreeBSD/FreeBSD.git/blob - contrib/llvm/tools/lldb/source/Plugins/SymbolFile/DWARF/DWARFFormValue.h
Merge ^/head r304236 through r304536.
[FreeBSD/FreeBSD.git] / 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 #include "DWARFDataExtractor.h"
15
16 class DWARFCompileUnit;
17
18 class DWARFFormValue
19 {
20 public:
21     typedef struct ValueTypeTag
22     {
23         ValueTypeTag() :
24             value(),
25             data(NULL)
26         {
27             value.uval = 0;
28         }
29
30         union
31         {
32             uint64_t uval;
33             int64_t sval;
34             const char* cstr;
35         } value;
36         const uint8_t* data;
37     } ValueType;
38     
39     class FixedFormSizes
40     {
41     public:
42         FixedFormSizes() :
43             m_fix_sizes(nullptr), m_size(0)
44         {}
45
46         FixedFormSizes(const uint8_t* fix_sizes, size_t size) :
47             m_fix_sizes(fix_sizes), m_size(size)
48         {}
49
50         uint8_t
51         GetSize(uint32_t index) const
52         {
53             return index < m_size ? m_fix_sizes[index] : 0;
54         }
55
56         bool
57         Empty() const
58         {
59             return m_size == 0;
60         }
61
62     private:
63         const uint8_t* m_fix_sizes;
64         size_t         m_size;
65     };
66
67     enum
68     {
69         eValueTypeInvalid = 0,
70         eValueTypeUnsigned,
71         eValueTypeSigned,
72         eValueTypeCStr,
73         eValueTypeBlock
74     };
75
76     DWARFFormValue();
77     DWARFFormValue(const DWARFCompileUnit* cu, dw_form_t form);
78     const DWARFCompileUnit* GetCompileUnit () const { return m_cu; }
79     void                SetCompileUnit (const DWARFCompileUnit* cu) { m_cu = cu; }
80     dw_form_t           Form()  const { return m_form; }
81     void                SetForm(dw_form_t form) { m_form = form; }
82     const ValueType&    Value() const { return m_value; }
83     void                Dump(lldb_private::Stream &s) const;
84     bool                ExtractValue(const lldb_private::DWARFDataExtractor& data,
85                                      lldb::offset_t* offset_ptr);
86     const uint8_t*      BlockData() const;
87     uint64_t            Reference() const;
88     uint64_t            Reference (dw_offset_t offset) const;
89     bool                Boolean() const { return m_value.value.uval != 0; }
90     uint64_t            Unsigned() const { return m_value.value.uval; }
91     void                SetUnsigned(uint64_t uval) { m_value.value.uval = uval; }
92     int64_t             Signed() const { return m_value.value.sval; }
93     void                SetSigned(int64_t sval) { m_value.value.sval = sval; }
94     const char*         AsCString() const;
95     dw_addr_t           Address() const;
96     bool                IsValid() const { return m_form != 0; }
97     bool                SkipValue(const lldb_private::DWARFDataExtractor& debug_info_data, lldb::offset_t *offset_ptr) const;
98     static bool         SkipValue(const dw_form_t form, const lldb_private::DWARFDataExtractor& debug_info_data, lldb::offset_t *offset_ptr, const DWARFCompileUnit* cu);
99     static bool         IsBlockForm(const dw_form_t form);
100     static bool         IsDataForm(const dw_form_t form);
101     static FixedFormSizes GetFixedFormSizesForAddressSize (uint8_t addr_size, bool is_dwarf64);
102     static int          Compare (const DWARFFormValue& a, 
103                                  const DWARFFormValue& b);
104     void                Clear();
105 protected:
106     const DWARFCompileUnit* m_cu; // Compile unit for this form
107     dw_form_t   m_form;     // Form for this value
108     ValueType   m_value;    // Contains all data for the form
109 };
110
111
112 #endif  // SymbolFileDWARF_DWARFFormValue_h_