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
|
//===-- DWARFContext.h ------------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===/
#ifndef LLVM_DEBUGINFO_DWARFCONTEXT_H
#define LLVM_DEBUGINFO_DWARFCONTEXT_H
#include "DWARFCompileUnit.h"
#include "DWARFDebugAranges.h"
#include "DWARFDebugLine.h"
#include "DWARFDebugRangeList.h"
#include "llvm/DebugInfo/DIContext.h"
#include "llvm/ADT/OwningPtr.h"
#include "llvm/ADT/SmallVector.h"
namespace llvm {
/// DWARFContext
/// This data structure is the top level entity that deals with dwarf debug
/// information parsing. The actual data is supplied through pure virtual
/// methods that a concrete implementation provides.
class DWARFContext : public DIContext {
bool IsLittleEndian;
const RelocAddrMap &RelocMap;
SmallVector<DWARFCompileUnit, 1> CUs;
OwningPtr<DWARFDebugAbbrev> Abbrev;
OwningPtr<DWARFDebugAranges> Aranges;
OwningPtr<DWARFDebugLine> Line;
DWARFContext(DWARFContext &) LLVM_DELETED_FUNCTION;
DWARFContext &operator=(DWARFContext &) LLVM_DELETED_FUNCTION;
/// Read compile units from the debug_info section and store them in CUs.
void parseCompileUnits();
protected:
DWARFContext(bool isLittleEndian, const RelocAddrMap &Map) :
IsLittleEndian(isLittleEndian), RelocMap(Map) {}
public:
virtual void dump(raw_ostream &OS);
/// Get the number of compile units in this context.
unsigned getNumCompileUnits() {
if (CUs.empty())
parseCompileUnits();
return CUs.size();
}
/// Get the compile unit at the specified index for this compile unit.
DWARFCompileUnit *getCompileUnitAtIndex(unsigned index) {
if (CUs.empty())
parseCompileUnits();
return &CUs[index];
}
/// Get a pointer to the parsed DebugAbbrev object.
const DWARFDebugAbbrev *getDebugAbbrev();
/// Get a pointer to the parsed DebugAranges object.
const DWARFDebugAranges *getDebugAranges();
/// Get a pointer to a parsed line table corresponding to a compile unit.
const DWARFDebugLine::LineTable *
getLineTableForCompileUnit(DWARFCompileUnit *cu);
virtual DILineInfo getLineInfoForAddress(uint64_t Address,
DILineInfoSpecifier Specifier = DILineInfoSpecifier());
virtual DIInliningInfo getInliningInfoForAddress(uint64_t Address,
DILineInfoSpecifier Specifier = DILineInfoSpecifier());
bool isLittleEndian() const { return IsLittleEndian; }
const RelocAddrMap &relocMap() const { return RelocMap; }
virtual StringRef getInfoSection() = 0;
virtual StringRef getAbbrevSection() = 0;
virtual StringRef getARangeSection() = 0;
virtual StringRef getLineSection() = 0;
virtual StringRef getStringSection() = 0;
virtual StringRef getRangeSection() = 0;
static bool isSupportedVersion(unsigned version) {
return version == 2 || version == 3;
}
private:
/// Return the compile unit that includes an offset (relative to .debug_info).
DWARFCompileUnit *getCompileUnitForOffset(uint32_t Offset);
/// Return the compile unit which contains instruction with provided
/// address.
DWARFCompileUnit *getCompileUnitForAddress(uint64_t Address);
};
/// DWARFContextInMemory is the simplest possible implementation of a
/// DWARFContext. It assumes all content is available in memory and stores
/// pointers to it.
class DWARFContextInMemory : public DWARFContext {
virtual void anchor();
StringRef InfoSection;
StringRef AbbrevSection;
StringRef ARangeSection;
StringRef LineSection;
StringRef StringSection;
StringRef RangeSection;
public:
DWARFContextInMemory(bool isLittleEndian,
StringRef infoSection,
StringRef abbrevSection,
StringRef aRangeSection,
StringRef lineSection,
StringRef stringSection,
StringRef rangeSection,
const RelocAddrMap &Map = RelocAddrMap())
: DWARFContext(isLittleEndian, Map),
InfoSection(infoSection),
AbbrevSection(abbrevSection),
ARangeSection(aRangeSection),
LineSection(lineSection),
StringSection(stringSection),
RangeSection(rangeSection)
{}
virtual StringRef getInfoSection() { return InfoSection; }
virtual StringRef getAbbrevSection() { return AbbrevSection; }
virtual StringRef getARangeSection() { return ARangeSection; }
virtual StringRef getLineSection() { return LineSection; }
virtual StringRef getStringSection() { return StringSection; }
virtual StringRef getRangeSection() { return RangeSection; }
};
}
#endif
|
