1 //===-- DWARFContext.h ------------------------------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===/
10 #ifndef LLVM_DEBUGINFO_DWARFCONTEXT_H
11 #define LLVM_DEBUGINFO_DWARFCONTEXT_H
13 #include "DWARFCompileUnit.h"
14 #include "DWARFDebugAranges.h"
15 #include "DWARFDebugFrame.h"
16 #include "DWARFDebugLine.h"
17 #include "DWARFDebugRangeList.h"
18 #include "llvm/ADT/OwningPtr.h"
19 #include "llvm/ADT/SmallVector.h"
20 #include "llvm/DebugInfo/DIContext.h"
25 /// This data structure is the top level entity that deals with dwarf debug
26 /// information parsing. The actual data is supplied through pure virtual
27 /// methods that a concrete implementation provides.
28 class DWARFContext : public DIContext {
29 SmallVector<DWARFCompileUnit, 1> CUs;
30 OwningPtr<DWARFDebugAbbrev> Abbrev;
31 OwningPtr<DWARFDebugAranges> Aranges;
32 OwningPtr<DWARFDebugLine> Line;
33 OwningPtr<DWARFDebugFrame> DebugFrame;
35 SmallVector<DWARFCompileUnit, 1> DWOCUs;
36 OwningPtr<DWARFDebugAbbrev> AbbrevDWO;
38 DWARFContext(DWARFContext &) LLVM_DELETED_FUNCTION;
39 DWARFContext &operator=(DWARFContext &) LLVM_DELETED_FUNCTION;
41 /// Read compile units from the debug_info section and store them in CUs.
42 void parseCompileUnits();
44 /// Read compile units from the debug_info.dwo section and store them in
46 void parseDWOCompileUnits();
50 virtual void dump(raw_ostream &OS, DIDumpType DumpType = DIDT_All);
52 /// Get the number of compile units in this context.
53 unsigned getNumCompileUnits() {
59 /// Get the number of compile units in the DWO context.
60 unsigned getNumDWOCompileUnits() {
62 parseDWOCompileUnits();
66 /// Get the compile unit at the specified index for this compile unit.
67 DWARFCompileUnit *getCompileUnitAtIndex(unsigned index) {
73 /// Get the compile unit at the specified index for the DWO compile units.
74 DWARFCompileUnit *getDWOCompileUnitAtIndex(unsigned index) {
76 parseDWOCompileUnits();
77 return &DWOCUs[index];
80 /// Get a pointer to the parsed DebugAbbrev object.
81 const DWARFDebugAbbrev *getDebugAbbrev();
83 /// Get a pointer to the parsed dwo abbreviations object.
84 const DWARFDebugAbbrev *getDebugAbbrevDWO();
86 /// Get a pointer to the parsed DebugAranges object.
87 const DWARFDebugAranges *getDebugAranges();
89 /// Get a pointer to the parsed frame information object.
90 const DWARFDebugFrame *getDebugFrame();
92 /// Get a pointer to a parsed line table corresponding to a compile unit.
93 const DWARFDebugLine::LineTable *
94 getLineTableForCompileUnit(DWARFCompileUnit *cu);
96 virtual DILineInfo getLineInfoForAddress(uint64_t Address,
97 DILineInfoSpecifier Specifier = DILineInfoSpecifier());
98 virtual DILineInfoTable getLineInfoForAddressRange(uint64_t Address,
99 uint64_t Size, DILineInfoSpecifier Specifier = DILineInfoSpecifier());
100 virtual DIInliningInfo getInliningInfoForAddress(uint64_t Address,
101 DILineInfoSpecifier Specifier = DILineInfoSpecifier());
103 virtual bool isLittleEndian() const = 0;
104 virtual uint8_t getAddressSize() const = 0;
105 virtual const RelocAddrMap &infoRelocMap() const = 0;
106 virtual const RelocAddrMap &lineRelocMap() const = 0;
107 virtual StringRef getInfoSection() = 0;
108 virtual StringRef getAbbrevSection() = 0;
109 virtual StringRef getARangeSection() = 0;
110 virtual StringRef getDebugFrameSection() = 0;
111 virtual StringRef getLineSection() = 0;
112 virtual StringRef getStringSection() = 0;
113 virtual StringRef getRangeSection() = 0;
115 // Sections for DWARF5 split dwarf proposal.
116 virtual StringRef getInfoDWOSection() = 0;
117 virtual StringRef getAbbrevDWOSection() = 0;
118 virtual StringRef getStringDWOSection() = 0;
119 virtual StringRef getStringOffsetDWOSection() = 0;
120 virtual StringRef getRangeDWOSection() = 0;
121 virtual StringRef getAddrSection() = 0;
122 virtual const RelocAddrMap &infoDWORelocMap() const = 0;
124 static bool isSupportedVersion(unsigned version) {
125 return version == 2 || version == 3;
128 /// Return the compile unit that includes an offset (relative to .debug_info).
129 DWARFCompileUnit *getCompileUnitForOffset(uint32_t Offset);
131 /// Return the compile unit which contains instruction with provided
133 DWARFCompileUnit *getCompileUnitForAddress(uint64_t Address);
136 /// DWARFContextInMemory is the simplest possible implementation of a
137 /// DWARFContext. It assumes all content is available in memory and stores
139 class DWARFContextInMemory : public DWARFContext {
140 virtual void anchor();
143 RelocAddrMap InfoRelocMap;
144 RelocAddrMap LineRelocMap;
145 StringRef InfoSection;
146 StringRef AbbrevSection;
147 StringRef ARangeSection;
148 StringRef DebugFrameSection;
149 StringRef LineSection;
150 StringRef StringSection;
151 StringRef RangeSection;
153 // Sections for DWARF5 split dwarf proposal.
154 RelocAddrMap InfoDWORelocMap;
155 StringRef InfoDWOSection;
156 StringRef AbbrevDWOSection;
157 StringRef StringDWOSection;
158 StringRef StringOffsetDWOSection;
159 StringRef RangeDWOSection;
160 StringRef AddrSection;
163 DWARFContextInMemory(object::ObjectFile *);
164 virtual bool isLittleEndian() const { return IsLittleEndian; }
165 virtual uint8_t getAddressSize() const { return AddressSize; }
166 virtual const RelocAddrMap &infoRelocMap() const { return InfoRelocMap; }
167 virtual const RelocAddrMap &lineRelocMap() const { return LineRelocMap; }
168 virtual StringRef getInfoSection() { return InfoSection; }
169 virtual StringRef getAbbrevSection() { return AbbrevSection; }
170 virtual StringRef getARangeSection() { return ARangeSection; }
171 virtual StringRef getDebugFrameSection() { return DebugFrameSection; }
172 virtual StringRef getLineSection() { return LineSection; }
173 virtual StringRef getStringSection() { return StringSection; }
174 virtual StringRef getRangeSection() { return RangeSection; }
176 // Sections for DWARF5 split dwarf proposal.
177 virtual StringRef getInfoDWOSection() { return InfoDWOSection; }
178 virtual StringRef getAbbrevDWOSection() { return AbbrevDWOSection; }
179 virtual StringRef getStringDWOSection() { return StringDWOSection; }
180 virtual StringRef getStringOffsetDWOSection() {
181 return StringOffsetDWOSection;
183 virtual StringRef getRangeDWOSection() { return RangeDWOSection; }
184 virtual StringRef getAddrSection() {
187 virtual const RelocAddrMap &infoDWORelocMap() const {
188 return InfoDWORelocMap;