DWARFExpression.h revision 24943d2ee8bfaa7cf5893e4709143924157a5c1e 
1//===-- DWARFExpression.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 liblldb_DWARFExpression_h_
11#define liblldb_DWARFExpression_h_
12
13#include "lldb/lldb-private.h"
14#include "lldb/Core/ClangForward.h"
15#include "lldb/Core/Address.h"
16#include "lldb/Core/DataExtractor.h"
17#include "lldb/Core/Error.h"
18#include "lldb/Core/Scalar.h"
19
20class ClangExpressionVariable;
21class ClangExpressionVariableList;
22
23namespace lldb_private {
24
25class ClangExpressionDeclMap;
26
27//----------------------------------------------------------------------
28// A class designed to evaluate the DWARF expression opcodes. We will
29// likely augment its abilities to handle features not supported by
30// the DWARF expression engine.
31//----------------------------------------------------------------------
32class DWARFExpression
33{
34public:
35
36    //------------------------------------------------------------------
37    // Constructors and Destructors
38    //------------------------------------------------------------------
39    DWARFExpression();
40
41    DWARFExpression(const DataExtractor& data,
42                    uint32_t data_offset,
43                    uint32_t data_length,
44                    const Address* loclist_base_addr_ptr);
45
46    DWARFExpression(const DWARFExpression& rhs);
47
48    virtual
49    ~DWARFExpression();
50
51    void
52    GetDescription (Stream *s, lldb::DescriptionLevel level) const;
53
54    bool
55    IsValid() const;
56
57    bool
58    IsLocationList() const;
59
60    bool
61    LocationListContainsLoadAddress (Process* process, const Address &addr) const;
62
63    void
64    SetOpcodeData(const DataExtractor& data, const Address* loclist_base_addr_ptr);
65
66    void
67    SetOpcodeData(const DataExtractor& data, uint32_t data_offset, uint32_t data_length, const Address* loclist_base_addr_ptr);
68
69    void
70    SetLocationListBaseAddress(Address& base_addr);
71
72    int
73    GetRegisterKind ();
74
75    void
76    SetRegisterKind (int reg_kind);
77
78    bool
79    Evaluate (ExecutionContextScope *exe_scope,
80              clang::ASTContext *ast_context,
81              const Value* initial_value_ptr,
82              Value& result,
83              Error *error_ptr) const;
84
85    bool
86    Evaluate (ExecutionContext *exe_ctx,
87              clang::ASTContext *ast_context,
88              const Value* initial_value_ptr,
89              Value& result,
90              Error *error_ptr) const;
91
92    static bool
93    Evaluate (ExecutionContext *exe_ctx,
94              clang::ASTContext *ast_context,
95              const DataExtractor& opcodes,
96              ClangExpressionVariableList *expr_locals,
97              ClangExpressionDeclMap *decl_map,
98              const uint32_t offset,
99              const uint32_t length,
100              const uint32_t reg_set,
101              const Value* initial_value_ptr,
102              Value& result,
103              Error *error_ptr);
104
105    void
106    SetExpressionLocalVariableList (ClangExpressionVariableList *locals);
107
108    void
109    SetExpressionDeclMap (ClangExpressionDeclMap *decl_map);
110
111protected:
112
113    void DumpLocation(Stream *s, uint32_t offset, uint32_t length, lldb::DescriptionLevel level) const;
114    //------------------------------------------------------------------
115    // Classes that inherit from DWARFExpression can see and modify these
116    //------------------------------------------------------------------
117    DataExtractor   m_data;
118    int m_reg_kind; // One of the defines that starts with LLDB_REGKIND_
119    Address m_loclist_base_addr; // Base address needed for location lists
120    ClangExpressionVariableList *m_expr_locals;
121    ClangExpressionDeclMap *m_decl_map;
122};
123
124} // namespace lldb_private
125
126#endif  // liblldb_DWARFExpression_h_
127