1 //===- tools/dsymutil/DebugMap.h - Generic debug map representation -------===//
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
12 /// This file contains the class declaration of the DebugMap
13 /// entity. A DebugMap lists all the object files linked together to
14 /// produce an executable along with the linked address of all the
15 /// atoms used in these object files.
16 /// The DebugMap is an input to the DwarfLinker class that will
17 /// extract the Dwarf debug information from the referenced object
18 /// files and link their usefull debug info together.
20 //===----------------------------------------------------------------------===//
21 #ifndef LLVM_TOOLS_DSYMUTIL_DEBUGMAP_H
22 #define LLVM_TOOLS_DSYMUTIL_DEBUGMAP_H
24 #include "llvm/ADT/DenseMap.h"
25 #include "llvm/ADT/StringMap.h"
26 #include "llvm/ADT/Triple.h"
27 #include "llvm/ADT/iterator_range.h"
28 #include "llvm/Object/ObjectFile.h"
29 #include "llvm/Support/ErrorOr.h"
30 #include "llvm/Support/Format.h"
31 #include "llvm/Support/Path.h"
32 #include "llvm/Support/YAMLTraits.h"
41 /// \brief The DebugMap object stores the list of object files to
42 /// query for debug information along with the mapping between the
43 /// symbols' addresses in the object file to their linked address in
44 /// the linked binary.
46 /// A DebugMap producer could look like this:
47 /// DebugMap *DM = new DebugMap();
48 /// for (const auto &Obj: LinkedObjects) {
49 /// DebugMapObject &DMO = DM->addDebugMapObject(Obj.getPath());
50 /// for (const auto &Sym: Obj.getLinkedSymbols())
51 /// DMO.addSymbol(Sym.getName(), Sym.getObjectFileAddress(),
52 /// Sym.getBinaryAddress());
55 /// A DebugMap consumer can then use the map to link the debug
56 /// information. For example something along the lines of:
57 /// for (const auto &DMO: DM->objects()) {
58 /// auto Obj = createBinary(DMO.getObjectFilename());
59 /// for (auto &DIE: Obj.getDwarfDIEs()) {
60 /// if (SymbolMapping *Sym = DMO.lookup(DIE.getName()))
61 /// DIE.relocate(Sym->ObjectAddress, Sym->BinaryAddress);
63 /// DIE.discardSubtree();
68 typedef std::vector<std::unique_ptr<DebugMapObject>> ObjectContainer;
69 ObjectContainer Objects;
71 /// For YAML IO support.
73 friend yaml::MappingTraits<std::unique_ptr<DebugMap>>;
74 friend yaml::MappingTraits<DebugMap>;
78 DebugMap(const Triple &BinaryTriple) : BinaryTriple(BinaryTriple) {}
80 typedef ObjectContainer::const_iterator const_iterator;
82 iterator_range<const_iterator> objects() const {
83 return make_range(begin(), end());
86 const_iterator begin() const { return Objects.begin(); }
88 const_iterator end() const { return Objects.end(); }
90 /// This function adds an DebugMapObject to the list owned by this
92 DebugMapObject &addDebugMapObject(StringRef ObjectFilePath);
94 const Triple &getTriple() const { return BinaryTriple; }
96 void print(raw_ostream &OS) const;
103 /// \brief The DebugMapObject represents one object file described by
104 /// the DebugMap. It contains a list of mappings between addresses in
105 /// the object file and in the linked binary for all the linked atoms
106 /// in this object file.
107 class DebugMapObject {
109 struct SymbolMapping {
110 yaml::Hex64 ObjectAddress;
111 yaml::Hex64 BinaryAddress;
113 SymbolMapping(uint64_t ObjectAddress, uint64_t BinaryAddress, uint32_t Size)
114 : ObjectAddress(ObjectAddress), BinaryAddress(BinaryAddress),
116 /// For YAML IO support
117 SymbolMapping() = default;
120 typedef StringMapEntry<SymbolMapping> DebugMapEntry;
122 /// \brief Adds a symbol mapping to this DebugMapObject.
123 /// \returns false if the symbol was already registered. The request
124 /// is discarded in this case.
125 bool addSymbol(llvm::StringRef SymName, uint64_t ObjectAddress,
126 uint64_t LinkedAddress, uint32_t Size);
128 /// \brief Lookup a symbol mapping.
129 /// \returns null if the symbol isn't found.
130 const DebugMapEntry *lookupSymbol(StringRef SymbolName) const;
132 /// \brief Lookup an objectfile address.
133 /// \returns null if the address isn't found.
134 const DebugMapEntry *lookupObjectAddress(uint64_t Address) const;
136 llvm::StringRef getObjectFilename() const { return Filename; }
138 iterator_range<StringMap<SymbolMapping>::const_iterator> symbols() const {
139 return make_range(Symbols.begin(), Symbols.end());
142 void print(raw_ostream &OS) const;
147 friend class DebugMap;
148 /// DebugMapObjects can only be constructed by the owning DebugMap.
149 DebugMapObject(StringRef ObjectFilename);
151 std::string Filename;
152 StringMap<SymbolMapping> Symbols;
153 DenseMap<uint64_t, DebugMapEntry *> AddressToMapping;
155 /// For YAMLIO support.
157 typedef std::pair<std::string, SymbolMapping> YAMLSymbolMapping;
158 friend yaml::MappingTraits<dsymutil::DebugMapObject>;
159 friend yaml::SequenceTraits<std::vector<std::unique_ptr<DebugMapObject>>>;
160 friend yaml::SequenceTraits<std::vector<YAMLSymbolMapping>>;
161 DebugMapObject() = default;
163 DebugMapObject &operator=(DebugMapObject RHS) {
164 std::swap(Filename, RHS.Filename);
165 std::swap(Symbols, RHS.Symbols);
166 std::swap(AddressToMapping, RHS.AddressToMapping);
169 DebugMapObject(DebugMapObject &&RHS) {
170 Filename = std::move(RHS.Filename);
171 Symbols = std::move(RHS.Symbols);
172 AddressToMapping = std::move(RHS.AddressToMapping);
179 LLVM_YAML_IS_SEQUENCE_VECTOR(llvm::dsymutil::DebugMapObject::YAMLSymbolMapping)
184 using namespace llvm::dsymutil;
187 struct MappingTraits<std::pair<std::string, DebugMapObject::SymbolMapping>> {
190 mapping(IO &io, std::pair<std::string, DebugMapObject::SymbolMapping> &s) {
191 io.mapRequired("sym", s.first);
192 io.mapRequired("objAddr", s.second.ObjectAddress);
193 io.mapRequired("binAddr", s.second.BinaryAddress);
194 io.mapOptional("size", s.second.Size);
197 static const bool flow = true;
200 template <> struct MappingTraits<dsymutil::DebugMapObject> {
201 // Normalize/Denormalize between YAML and a DebugMapObject.
205 YamlDMO(IO &io, dsymutil::DebugMapObject &Obj) {
206 Filename = Obj.Filename;
207 Entries.reserve(Obj.Symbols.size());
208 for (auto &Entry : Obj.Symbols)
209 Entries.push_back(std::make_pair(Entry.getKey(), Entry.getValue()));
212 dsymutil::DebugMapObject denormalize(IO &IO) {
213 void *Ctxt = IO.getContext();
214 StringRef PrependPath = *reinterpret_cast<StringRef*>(Ctxt);
215 SmallString<80> Path(PrependPath);
216 sys::path::append(Path, Filename);
217 dsymutil::DebugMapObject Res(Path);
218 for (auto &Entry : Entries) {
219 auto &Mapping = Entry.second;
220 Res.addSymbol(Entry.first, Mapping.ObjectAddress, Mapping.BinaryAddress,
226 std::string Filename;
227 std::vector<dsymutil::DebugMapObject::YAMLSymbolMapping> Entries;
230 static void mapping(IO &io, dsymutil::DebugMapObject &DMO) {
231 MappingNormalization<YamlDMO, dsymutil::DebugMapObject> Norm(io, DMO);
232 io.mapRequired("filename", Norm->Filename);
233 io.mapRequired("symbols", Norm->Entries);
237 template <> struct ScalarTraits<Triple> {
239 static void output(const Triple &val, void *, llvm::raw_ostream &out) {
243 static StringRef input(StringRef scalar, void *, Triple &value) {
244 value = Triple(scalar);
248 static bool mustQuote(StringRef) { return true; }
252 struct SequenceTraits<std::vector<std::unique_ptr<dsymutil::DebugMapObject>>> {
255 size(IO &io, std::vector<std::unique_ptr<dsymutil::DebugMapObject>> &seq) {
259 static dsymutil::DebugMapObject &
260 element(IO &, std::vector<std::unique_ptr<dsymutil::DebugMapObject>> &seq,
262 if (index >= seq.size()) {
263 seq.resize(index + 1);
264 seq[index].reset(new dsymutil::DebugMapObject);
270 template <> struct MappingTraits<dsymutil::DebugMap> {
271 static void mapping(IO &io, dsymutil::DebugMap &DM) {
272 io.mapRequired("triple", DM.BinaryTriple);
273 io.mapOptional("objects", DM.Objects);
277 template <> struct MappingTraits<std::unique_ptr<dsymutil::DebugMap>> {
278 static void mapping(IO &io, std::unique_ptr<dsymutil::DebugMap> &DM) {
280 DM.reset(new DebugMap());
281 io.mapRequired("triple", DM->BinaryTriple);
282 io.mapOptional("objects", DM->Objects);
288 #endif // LLVM_TOOLS_DSYMUTIL_DEBUGMAP_H