1 //===- tools/dsymutil/DebugMap.cpp - Generic debug map representation -----===//
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
11 #include "BinaryHolder.h"
12 #include "llvm/ADT/Optional.h"
13 #include "llvm/ADT/SmallString.h"
14 #include "llvm/ADT/StringMap.h"
15 #include "llvm/ADT/StringRef.h"
16 #include "llvm/ADT/Triple.h"
17 #include "llvm/ADT/iterator_range.h"
18 #include "llvm/BinaryFormat/MachO.h"
19 #include "llvm/Object/ObjectFile.h"
20 #include "llvm/Support/Chrono.h"
21 #include "llvm/Support/Error.h"
22 #include "llvm/Support/Format.h"
23 #include "llvm/Support/MemoryBuffer.h"
24 #include "llvm/Support/Path.h"
25 #include "llvm/Support/YAMLTraits.h"
26 #include "llvm/Support/raw_ostream.h"
39 using namespace llvm::object;
41 DebugMapObject::DebugMapObject(StringRef ObjectFilename,
42 sys::TimePoint<std::chrono::seconds> Timestamp,
44 : Filename(ObjectFilename), Timestamp(Timestamp), Type(Type) {}
46 bool DebugMapObject::addSymbol(StringRef Name, Optional<uint64_t> ObjectAddress,
47 uint64_t LinkedAddress, uint32_t Size) {
48 auto InsertResult = Symbols.insert(
49 std::make_pair(Name, SymbolMapping(ObjectAddress, LinkedAddress, Size)));
51 if (ObjectAddress && InsertResult.second)
52 AddressToMapping[*ObjectAddress] = &*InsertResult.first;
53 return InsertResult.second;
56 void DebugMapObject::print(raw_ostream &OS) const {
57 OS << getObjectFilename() << ":\n";
58 // Sort the symbols in alphabetical order, like llvm-nm (and to get
59 // deterministic output for testing).
60 using Entry = std::pair<StringRef, SymbolMapping>;
61 std::vector<Entry> Entries;
62 Entries.reserve(Symbols.getNumItems());
63 for (const auto &Sym : make_range(Symbols.begin(), Symbols.end()))
64 Entries.push_back(std::make_pair(Sym.getKey(), Sym.getValue()));
66 Entries.begin(), Entries.end(),
67 [](const Entry &LHS, const Entry &RHS) { return LHS.first < RHS.first; });
68 for (const auto &Sym : Entries) {
69 if (Sym.second.ObjectAddress)
70 OS << format("\t%016" PRIx64, uint64_t(*Sym.second.ObjectAddress));
72 OS << "\t????????????????";
73 OS << format(" => %016" PRIx64 "+0x%x\t%s\n",
74 uint64_t(Sym.second.BinaryAddress), uint32_t(Sym.second.Size),
81 void DebugMapObject::dump() const { print(errs()); }
85 DebugMap::addDebugMapObject(StringRef ObjectFilePath,
86 sys::TimePoint<std::chrono::seconds> Timestamp,
88 Objects.emplace_back(new DebugMapObject(ObjectFilePath, Timestamp, Type));
89 return *Objects.back();
92 const DebugMapObject::DebugMapEntry *
93 DebugMapObject::lookupSymbol(StringRef SymbolName) const {
94 StringMap<SymbolMapping>::const_iterator Sym = Symbols.find(SymbolName);
95 if (Sym == Symbols.end())
100 const DebugMapObject::DebugMapEntry *
101 DebugMapObject::lookupObjectAddress(uint64_t Address) const {
102 auto Mapping = AddressToMapping.find(Address);
103 if (Mapping == AddressToMapping.end())
105 return Mapping->getSecond();
108 void DebugMap::print(raw_ostream &OS) const {
109 yaml::Output yout(OS, /* Ctxt = */ nullptr, /* WrapColumn = */ 0);
110 yout << const_cast<DebugMap &>(*this);
114 void DebugMap::dump() const { print(errs()); }
120 StringRef PrependPath;
124 } // end anonymous namespace
126 ErrorOr<std::vector<std::unique_ptr<DebugMap>>>
127 DebugMap::parseYAMLDebugMap(StringRef InputFile, StringRef PrependPath,
129 auto ErrOrFile = MemoryBuffer::getFileOrSTDIN(InputFile);
130 if (auto Err = ErrOrFile.getError())
135 Ctxt.PrependPath = PrependPath;
137 std::unique_ptr<DebugMap> Res;
138 yaml::Input yin((*ErrOrFile)->getBuffer(), &Ctxt);
141 if (auto EC = yin.error())
143 std::vector<std::unique_ptr<DebugMap>> Result;
144 Result.push_back(std::move(Res));
145 return std::move(Result);
148 } // end namespace dsymutil
152 // Normalize/Denormalize between YAML and a DebugMapObject.
153 struct MappingTraits<dsymutil::DebugMapObject>::YamlDMO {
154 YamlDMO(IO &io) { Timestamp = 0; }
155 YamlDMO(IO &io, dsymutil::DebugMapObject &Obj);
156 dsymutil::DebugMapObject denormalize(IO &IO);
158 std::string Filename;
160 std::vector<dsymutil::DebugMapObject::YAMLSymbolMapping> Entries;
163 void MappingTraits<std::pair<std::string, DebugMapObject::SymbolMapping>>::
164 mapping(IO &io, std::pair<std::string, DebugMapObject::SymbolMapping> &s) {
165 io.mapRequired("sym", s.first);
166 io.mapOptional("objAddr", s.second.ObjectAddress);
167 io.mapRequired("binAddr", s.second.BinaryAddress);
168 io.mapOptional("size", s.second.Size);
171 void MappingTraits<dsymutil::DebugMapObject>::mapping(
172 IO &io, dsymutil::DebugMapObject &DMO) {
173 MappingNormalization<YamlDMO, dsymutil::DebugMapObject> Norm(io, DMO);
174 io.mapRequired("filename", Norm->Filename);
175 io.mapOptional("timestamp", Norm->Timestamp);
176 io.mapRequired("symbols", Norm->Entries);
179 void ScalarTraits<Triple>::output(const Triple &val, void *, raw_ostream &out) {
183 StringRef ScalarTraits<Triple>::input(StringRef scalar, void *, Triple &value) {
184 value = Triple(scalar);
189 SequenceTraits<std::vector<std::unique_ptr<dsymutil::DebugMapObject>>>::size(
190 IO &io, std::vector<std::unique_ptr<dsymutil::DebugMapObject>> &seq) {
194 dsymutil::DebugMapObject &
195 SequenceTraits<std::vector<std::unique_ptr<dsymutil::DebugMapObject>>>::element(
196 IO &, std::vector<std::unique_ptr<dsymutil::DebugMapObject>> &seq,
198 if (index >= seq.size()) {
199 seq.resize(index + 1);
200 seq[index].reset(new dsymutil::DebugMapObject);
205 void MappingTraits<dsymutil::DebugMap>::mapping(IO &io,
206 dsymutil::DebugMap &DM) {
207 io.mapRequired("triple", DM.BinaryTriple);
208 io.mapOptional("binary-path", DM.BinaryPath);
209 if (void *Ctxt = io.getContext())
210 reinterpret_cast<YAMLContext *>(Ctxt)->BinaryTriple = DM.BinaryTriple;
211 io.mapOptional("objects", DM.Objects);
214 void MappingTraits<std::unique_ptr<dsymutil::DebugMap>>::mapping(
215 IO &io, std::unique_ptr<dsymutil::DebugMap> &DM) {
217 DM.reset(new DebugMap());
218 io.mapRequired("triple", DM->BinaryTriple);
219 io.mapOptional("binary-path", DM->BinaryPath);
220 if (void *Ctxt = io.getContext())
221 reinterpret_cast<YAMLContext *>(Ctxt)->BinaryTriple = DM->BinaryTriple;
222 io.mapOptional("objects", DM->Objects);
225 MappingTraits<dsymutil::DebugMapObject>::YamlDMO::YamlDMO(
226 IO &io, dsymutil::DebugMapObject &Obj) {
227 Filename = Obj.Filename;
228 Timestamp = sys::toTimeT(Obj.getTimestamp());
229 Entries.reserve(Obj.Symbols.size());
230 for (auto &Entry : Obj.Symbols)
231 Entries.push_back(std::make_pair(Entry.getKey(), Entry.getValue()));
234 dsymutil::DebugMapObject
235 MappingTraits<dsymutil::DebugMapObject>::YamlDMO::denormalize(IO &IO) {
236 BinaryHolder BinHolder(/* Verbose =*/false);
237 const auto &Ctxt = *reinterpret_cast<YAMLContext *>(IO.getContext());
238 SmallString<80> Path(Ctxt.PrependPath);
239 StringMap<uint64_t> SymbolAddresses;
241 sys::path::append(Path, Filename);
242 auto ErrOrObjectFiles = BinHolder.GetObjectFiles(Path);
243 if (auto EC = ErrOrObjectFiles.getError()) {
244 errs() << "warning: Unable to open " << Path << " " << EC.message() << '\n';
245 } else if (auto ErrOrObjectFile = BinHolder.Get(Ctxt.BinaryTriple)) {
246 // Rewrite the object file symbol addresses in the debug map. The
247 // YAML input is mainly used to test llvm-dsymutil without
248 // requiring binaries checked-in. If we generate the object files
249 // during the test, we can't hard-code the symbols addresses, so
250 // look them up here and rewrite them.
251 for (const auto &Sym : ErrOrObjectFile->symbols()) {
252 uint64_t Address = Sym.getValue();
253 Expected<StringRef> Name = Sym.getName();
255 (Sym.getFlags() & (SymbolRef::SF_Absolute | SymbolRef::SF_Common))) {
256 // TODO: Actually report errors helpfully.
258 consumeError(Name.takeError());
261 SymbolAddresses[*Name] = Address;
265 dsymutil::DebugMapObject Res(Path, sys::toTimePoint(Timestamp), MachO::N_OSO);
266 for (auto &Entry : Entries) {
267 auto &Mapping = Entry.second;
268 Optional<uint64_t> ObjAddress;
269 if (Mapping.ObjectAddress)
270 ObjAddress = *Mapping.ObjectAddress;
271 auto AddressIt = SymbolAddresses.find(Entry.first);
272 if (AddressIt != SymbolAddresses.end())
273 ObjAddress = AddressIt->getValue();
274 Res.addSymbol(Entry.first, ObjAddress, Mapping.BinaryAddress, Mapping.Size);
279 } // end namespace yaml
280 } // end namespace llvm