1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
|
// Copyright (c) 2010 Google Inc. All Rights Reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// This file contains the definitions for a DWARF2/3 information
// collector that uses the DWARF2/3 reader interface to build a mapping
// of addresses to files, lines, and functions.
#ifndef COMMON_DWARF_FUNCTIONINFO_H__
#define COMMON_DWARF_FUNCTIONINFO_H__
#include <map>
#include <string>
#include <utility>
#include <vector>
#include "common/dwarf/dwarf2reader.h"
#include "common/using_std_string.h"
namespace dwarf2reader {
struct FunctionInfo {
// Name of the function
string name;
// Mangled name of the function
string mangled_name;
// File containing this function
string file;
// Line number for start of function.
uint32 line;
// Beginning address for this function
uint64 lowpc;
// End address for this function.
uint64 highpc;
// Ranges offset
uint64 ranges;
};
struct SourceFileInfo {
// Name of the source file name
string name;
// Low address of source file name
uint64 lowpc;
};
typedef std::map<uint64, FunctionInfo*> FunctionMap;
typedef std::map<uint64, std::pair<string, uint32> > LineMap;
// This class is a basic line info handler that fills in the dirs,
// file, and linemap passed into it with the data produced from the
// LineInfoHandler.
class CULineInfoHandler: public LineInfoHandler {
public:
//
CULineInfoHandler(std::vector<SourceFileInfo>* files,
std::vector<string>* dirs,
LineMap* linemap);
virtual ~CULineInfoHandler() { }
// Called when we define a directory. We just place NAME into dirs_
// at position DIR_NUM.
virtual void DefineDir(const string& name, uint32 dir_num);
// Called when we define a filename. We just place
// concat(dirs_[DIR_NUM], NAME) into files_ at position FILE_NUM.
virtual void DefineFile(const string& name, int32 file_num,
uint32 dir_num, uint64 mod_time, uint64 length);
// Called when the line info reader has a new line, address pair
// ready for us. ADDRESS is the address of the code, LENGTH is the
// length of its machine code in bytes, FILE_NUM is the file number
// containing the code, LINE_NUM is the line number in that file for
// the code, and COLUMN_NUM is the column number the code starts at,
// if we know it (0 otherwise).
virtual void AddLine(uint64 address, uint64 length,
uint32 file_num, uint32 line_num, uint32 column_num);
private:
LineMap* linemap_;
std::vector<SourceFileInfo>* files_;
std::vector<string>* dirs_;
};
class CUFunctionInfoHandler: public Dwarf2Handler {
public:
CUFunctionInfoHandler(std::vector<SourceFileInfo>* files,
std::vector<string>* dirs,
LineMap* linemap,
FunctionMap* offset_to_funcinfo,
FunctionMap* address_to_funcinfo,
CULineInfoHandler* linehandler,
const SectionMap& sections,
ByteReader* reader)
: files_(files), dirs_(dirs), linemap_(linemap),
offset_to_funcinfo_(offset_to_funcinfo),
address_to_funcinfo_(address_to_funcinfo),
linehandler_(linehandler), sections_(sections),
reader_(reader), current_function_info_(NULL) { }
virtual ~CUFunctionInfoHandler() { }
// Start to process a compilation unit at OFFSET from the beginning of the
// .debug_info section. We want to see all compilation units, so we
// always return true.
virtual bool StartCompilationUnit(uint64 offset, uint8 address_size,
uint8 offset_size, uint64 cu_length,
uint8 dwarf_version);
// Start to process a DIE at OFFSET from the beginning of the
// .debug_info section. We only care about function related DIE's.
virtual bool StartDIE(uint64 offset, enum DwarfTag tag);
// Called when we have an attribute with unsigned data to give to
// our handler. The attribute is for the DIE at OFFSET from the
// beginning of the .debug_info section, has a name of ATTR, a form of
// FORM, and the actual data of the attribute is in DATA.
virtual void ProcessAttributeUnsigned(uint64 offset,
enum DwarfAttribute attr,
enum DwarfForm form,
uint64 data);
// Called when we have an attribute with a DIE reference to give to
// our handler. The attribute is for the DIE at OFFSET from the
// beginning of the .debug_info section, has a name of ATTR, a form of
// FORM, and the offset of the referenced DIE from the start of the
// .debug_info section is in DATA.
virtual void ProcessAttributeReference(uint64 offset,
enum DwarfAttribute attr,
enum DwarfForm form,
uint64 data);
// Called when we have an attribute with string data to give to
// our handler. The attribute is for the DIE at OFFSET from the
// beginning of the .debug_info section, has a name of ATTR, a form of
// FORM, and the actual data of the attribute is in DATA.
virtual void ProcessAttributeString(uint64 offset,
enum DwarfAttribute attr,
enum DwarfForm form,
const string& data);
// Called when finished processing the DIE at OFFSET.
// Because DWARF2/3 specifies a tree of DIEs, you may get starts
// before ends of the previous DIE, as we process children before
// ending the parent.
virtual void EndDIE(uint64 offset);
private:
std::vector<SourceFileInfo>* files_;
std::vector<string>* dirs_;
LineMap* linemap_;
FunctionMap* offset_to_funcinfo_;
FunctionMap* address_to_funcinfo_;
CULineInfoHandler* linehandler_;
const SectionMap& sections_;
ByteReader* reader_;
FunctionInfo* current_function_info_;
uint64 current_compilation_unit_offset_;
};
} // namespace dwarf2reader
#endif // COMMON_DWARF_FUNCTIONINFO_H__
|
