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 "DWARFDebugLoc.h"
18 #include "DWARFDebugRangeList.h"
19 #include "DWARFTypeUnit.h"
20 #include "llvm/ADT/MapVector.h"
21 #include "llvm/ADT/SmallVector.h"
22 #include "llvm/DebugInfo/DIContext.h"
27 /// This data structure is the top level entity that deals with dwarf debug
28 /// information parsing. The actual data is supplied through pure virtual
29 /// methods that a concrete implementation provides.
30 class DWARFContext : public DIContext {
31 typedef SmallVector<DWARFCompileUnit *, 1> CUVector;
32 typedef SmallVector<DWARFTypeUnit *, 1> TUVector;
36 std::unique_ptr<DWARFDebugAbbrev> Abbrev;
37 std::unique_ptr<DWARFDebugLoc> Loc;
38 std::unique_ptr<DWARFDebugAranges> Aranges;
39 std::unique_ptr<DWARFDebugLine> Line;
40 std::unique_ptr<DWARFDebugFrame> DebugFrame;
44 std::unique_ptr<DWARFDebugAbbrev> AbbrevDWO;
46 DWARFContext(DWARFContext &) LLVM_DELETED_FUNCTION;
47 DWARFContext &operator=(DWARFContext &) LLVM_DELETED_FUNCTION;
49 /// Read compile units from the debug_info section (if necessary)
50 /// and store them in CUs.
51 void parseCompileUnits();
53 /// Read type units from the debug_types sections (if necessary)
54 /// and store them in TUs.
55 void parseTypeUnits();
57 /// Read compile units from the debug_info.dwo section (if necessary)
58 /// and store them in DWOCUs.
59 void parseDWOCompileUnits();
61 /// Read type units from the debug_types.dwo section (if necessary)
62 /// and store them in DWOTUs.
63 void parseDWOTypeUnits();
71 DWARFContext() : DIContext(CK_DWARF) {}
72 virtual ~DWARFContext();
74 static bool classof(const DIContext *DICtx) {
75 return DICtx->getKind() == CK_DWARF;
78 void dump(raw_ostream &OS, DIDumpType DumpType = DIDT_All) override;
80 typedef iterator_range<CUVector::iterator> cu_iterator_range;
81 typedef iterator_range<TUVector::iterator> tu_iterator_range;
83 /// Get compile units in this context.
84 cu_iterator_range compile_units() {
86 return cu_iterator_range(CUs.begin(), CUs.end());
89 /// Get type units in this context.
90 tu_iterator_range type_units() {
92 return tu_iterator_range(TUs.begin(), TUs.end());
95 /// Get compile units in the DWO context.
96 cu_iterator_range dwo_compile_units() {
97 parseDWOCompileUnits();
98 return cu_iterator_range(DWOCUs.begin(), DWOCUs.end());
101 /// Get type units in the DWO context.
102 tu_iterator_range dwo_type_units() {
104 return tu_iterator_range(DWOTUs.begin(), DWOTUs.end());
107 /// Get the number of compile units in this context.
108 unsigned getNumCompileUnits() {
113 /// Get the number of compile units in this context.
114 unsigned getNumTypeUnits() {
119 /// Get the number of compile units in the DWO context.
120 unsigned getNumDWOCompileUnits() {
121 parseDWOCompileUnits();
122 return DWOCUs.size();
125 /// Get the number of compile units in the DWO context.
126 unsigned getNumDWOTypeUnits() {
128 return DWOTUs.size();
131 /// Get the compile unit at the specified index for this compile unit.
132 DWARFCompileUnit *getCompileUnitAtIndex(unsigned index) {
137 /// Get the compile unit at the specified index for the DWO compile units.
138 DWARFCompileUnit *getDWOCompileUnitAtIndex(unsigned index) {
139 parseDWOCompileUnits();
140 return DWOCUs[index];
143 /// Get a pointer to the parsed DebugAbbrev object.
144 const DWARFDebugAbbrev *getDebugAbbrev();
146 /// Get a pointer to the parsed DebugLoc object.
147 const DWARFDebugLoc *getDebugLoc();
149 /// Get a pointer to the parsed dwo abbreviations object.
150 const DWARFDebugAbbrev *getDebugAbbrevDWO();
152 /// Get a pointer to the parsed DebugAranges object.
153 const DWARFDebugAranges *getDebugAranges();
155 /// Get a pointer to the parsed frame information object.
156 const DWARFDebugFrame *getDebugFrame();
158 /// Get a pointer to a parsed line table corresponding to a compile unit.
159 const DWARFDebugLine::LineTable *
160 getLineTableForCompileUnit(DWARFCompileUnit *cu);
162 DILineInfo getLineInfoForAddress(uint64_t Address,
163 DILineInfoSpecifier Specifier = DILineInfoSpecifier()) override;
164 DILineInfoTable getLineInfoForAddressRange(uint64_t Address, uint64_t Size,
165 DILineInfoSpecifier Specifier = DILineInfoSpecifier()) override;
166 DIInliningInfo getInliningInfoForAddress(uint64_t Address,
167 DILineInfoSpecifier Specifier = DILineInfoSpecifier()) override;
169 virtual bool isLittleEndian() const = 0;
170 virtual uint8_t getAddressSize() const = 0;
171 virtual const Section &getInfoSection() = 0;
172 typedef MapVector<object::SectionRef, Section,
173 std::map<object::SectionRef, unsigned> > TypeSectionMap;
174 virtual const TypeSectionMap &getTypesSections() = 0;
175 virtual StringRef getAbbrevSection() = 0;
176 virtual const Section &getLocSection() = 0;
177 virtual StringRef getARangeSection() = 0;
178 virtual StringRef getDebugFrameSection() = 0;
179 virtual const Section &getLineSection() = 0;
180 virtual const Section &getLineDWOSection() = 0;
181 virtual StringRef getStringSection() = 0;
182 virtual StringRef getRangeSection() = 0;
183 virtual StringRef getPubNamesSection() = 0;
184 virtual StringRef getPubTypesSection() = 0;
185 virtual StringRef getGnuPubNamesSection() = 0;
186 virtual StringRef getGnuPubTypesSection() = 0;
188 // Sections for DWARF5 split dwarf proposal.
189 virtual const Section &getInfoDWOSection() = 0;
190 virtual const TypeSectionMap &getTypesDWOSections() = 0;
191 virtual StringRef getAbbrevDWOSection() = 0;
192 virtual StringRef getStringDWOSection() = 0;
193 virtual StringRef getStringOffsetDWOSection() = 0;
194 virtual StringRef getRangeDWOSection() = 0;
195 virtual StringRef getAddrSection() = 0;
197 static bool isSupportedVersion(unsigned version) {
198 return version == 2 || version == 3 || version == 4;
201 /// Return the compile unit that includes an offset (relative to .debug_info).
202 DWARFCompileUnit *getCompileUnitForOffset(uint32_t Offset);
204 /// Return the compile unit which contains instruction with provided
206 DWARFCompileUnit *getCompileUnitForAddress(uint64_t Address);
209 /// DWARFContextInMemory is the simplest possible implementation of a
210 /// DWARFContext. It assumes all content is available in memory and stores
212 class DWARFContextInMemory : public DWARFContext {
213 virtual void anchor();
217 TypeSectionMap TypesSections;
218 StringRef AbbrevSection;
220 StringRef ARangeSection;
221 StringRef DebugFrameSection;
223 Section LineDWOSection;
224 StringRef StringSection;
225 StringRef RangeSection;
226 StringRef PubNamesSection;
227 StringRef PubTypesSection;
228 StringRef GnuPubNamesSection;
229 StringRef GnuPubTypesSection;
231 // Sections for DWARF5 split dwarf proposal.
232 Section InfoDWOSection;
233 TypeSectionMap TypesDWOSections;
234 StringRef AbbrevDWOSection;
235 StringRef StringDWOSection;
236 StringRef StringOffsetDWOSection;
237 StringRef RangeDWOSection;
238 StringRef AddrSection;
240 SmallVector<MemoryBuffer*, 4> UncompressedSections;
243 DWARFContextInMemory(object::ObjectFile *);
244 ~DWARFContextInMemory();
245 bool isLittleEndian() const override { return IsLittleEndian; }
246 uint8_t getAddressSize() const override { return AddressSize; }
247 const Section &getInfoSection() override { return InfoSection; }
248 const TypeSectionMap &getTypesSections() override { return TypesSections; }
249 StringRef getAbbrevSection() override { return AbbrevSection; }
250 const Section &getLocSection() override { return LocSection; }
251 StringRef getARangeSection() override { return ARangeSection; }
252 StringRef getDebugFrameSection() override { return DebugFrameSection; }
253 const Section &getLineSection() override { return LineSection; }
254 const Section &getLineDWOSection() override { return LineDWOSection; }
255 StringRef getStringSection() override { return StringSection; }
256 StringRef getRangeSection() override { return RangeSection; }
257 StringRef getPubNamesSection() override { return PubNamesSection; }
258 StringRef getPubTypesSection() override { return PubTypesSection; }
259 StringRef getGnuPubNamesSection() override { return GnuPubNamesSection; }
260 StringRef getGnuPubTypesSection() override { return GnuPubTypesSection; }
262 // Sections for DWARF5 split dwarf proposal.
263 const Section &getInfoDWOSection() override { return InfoDWOSection; }
264 const TypeSectionMap &getTypesDWOSections() override {
265 return TypesDWOSections;
267 StringRef getAbbrevDWOSection() override { return AbbrevDWOSection; }
268 StringRef getStringDWOSection() override { return StringDWOSection; }
269 StringRef getStringOffsetDWOSection() override {
270 return StringOffsetDWOSection;
272 StringRef getRangeDWOSection() override { return RangeDWOSection; }
273 StringRef getAddrSection() override {