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comparison lld/ELF/Symbols.h @ 207:2e18cbf3894f

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LLVM12
author Shinji KONO <kono@ie.u-ryukyu.ac.jp>
date Tue, 08 Jun 2021 06:07:14 +0900
parents 0572611fdcc8
children c4bab56944e8
comparison
equal deleted inserted replaced
173:0572611fdcc8 207:2e18cbf3894f
130 // False if LTO shouldn't inline whatever this symbol points to. If a symbol 130 // False if LTO shouldn't inline whatever this symbol points to. If a symbol
131 // is overwritten after LTO, LTO shouldn't inline the symbol because it 131 // is overwritten after LTO, LTO shouldn't inline the symbol because it
132 // doesn't know the final contents of the symbol. 132 // doesn't know the final contents of the symbol.
133 uint8_t canInline : 1; 133 uint8_t canInline : 1;
134 134
135 // Used by Undefined and SharedSymbol to track if there has been at least one 135 // Used to track if there has been at least one undefined reference to the
136 // undefined reference to the symbol. The binding may change to STB_WEAK if 136 // symbol. For Undefined and SharedSymbol, the binding may change to STB_WEAK
137 // the first undefined reference from a non-shared object is weak. 137 // if the first undefined reference from a non-shared object is weak.
138 //
139 // This is also used to retain __wrap_foo when foo is referenced.
138 uint8_t referenced : 1; 140 uint8_t referenced : 1;
139 141
140 // True if this symbol is specified by --trace-symbol option. 142 // True if this symbol is specified by --trace-symbol option.
141 uint8_t traced : 1; 143 uint8_t traced : 1;
142 144
175 nameData = s.data(); 177 nameData = s.data();
176 nameSize = s.size(); 178 nameSize = s.size();
177 } 179 }
178 180
179 void parseSymbolVersion(); 181 void parseSymbolVersion();
182
183 // Get the NUL-terminated version suffix ("", "@...", or "@@...").
184 //
185 // For @@, the name has been truncated by insert(). For @, the name has been
186 // truncated by Symbol::parseSymbolVersion().
187 const char *getVersionSuffix() const {
188 (void)getName();
189 return nameData + nameSize;
190 }
180 191
181 bool isInGot() const { return gotIndex != -1U; } 192 bool isInGot() const { return gotIndex != -1U; }
182 bool isInPlt() const { return pltIndex != -1U; } 193 bool isInPlt() const { return pltIndex != -1U; }
183 194
184 uint64_t getVA(int64_t addend = 0) const; 195 uint64_t getVA(int64_t addend = 0) const;
210 // If this is a lazy symbol, fetch an input file and add the symbol 221 // If this is a lazy symbol, fetch an input file and add the symbol
211 // in the file to the symbol table. Calling this function on 222 // in the file to the symbol table. Calling this function on
212 // non-lazy object causes a runtime error. 223 // non-lazy object causes a runtime error.
213 void fetch() const; 224 void fetch() const;
214 225
215 private:
216 static bool isExportDynamic(Kind k, uint8_t visibility) { 226 static bool isExportDynamic(Kind k, uint8_t visibility) {
217 if (k == SharedKind) 227 if (k == SharedKind)
218 return visibility == llvm::ELF::STV_DEFAULT; 228 return visibility == llvm::ELF::STV_DEFAULT;
219 return config->shared || config->exportDynamic; 229 return config->shared || config->exportDynamic;
220 } 230 }
221 231
232 private:
222 void resolveUndefined(const Undefined &other); 233 void resolveUndefined(const Undefined &other);
223 void resolveCommon(const CommonSymbol &other); 234 void resolveCommon(const CommonSymbol &other);
224 void resolveDefined(const Defined &other); 235 void resolveDefined(const Defined &other);
225 template <class LazyT> void resolveLazy(const LazyT &other); 236 template <class LazyT> void resolveLazy(const LazyT &other);
226 void resolveShared(const SharedSymbol &other); 237 void resolveShared(const SharedSymbol &other);
565 bool computeIsPreemptible(const Symbol &sym); 576 bool computeIsPreemptible(const Symbol &sym);
566 void reportBackrefs(); 577 void reportBackrefs();
567 578
568 // A mapping from a symbol to an InputFile referencing it backward. Used by 579 // A mapping from a symbol to an InputFile referencing it backward. Used by
569 // --warn-backrefs. 580 // --warn-backrefs.
570 extern llvm::DenseMap<const Symbol *, const InputFile *> backwardReferences; 581 extern llvm::DenseMap<const Symbol *,
582 std::pair<const InputFile *, const InputFile *>>
583 backwardReferences;
571 584
572 } // namespace elf 585 } // namespace elf
573 } // namespace lld 586 } // namespace lld
574 587
575 #endif 588 #endif