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  1. //===- ModuleSymbolTable.h - symbol table for in-memory IR ------*- C++ -*-===//
  2. //
  3. // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
  4. // See https://llvm.org/LICENSE.txt for license information.
  5. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  6. //
  7. //===----------------------------------------------------------------------===//
  8. //
  9. // This class represents a symbol table built from in-memory IR. It provides
  10. // access to GlobalValues and should only be used if such access is required
  11. // (e.g. in the LTO implementation).
  12. //
  13. //===----------------------------------------------------------------------===//
  14.  
  15. #ifndef LLVM_OBJECT_MODULESYMBOLTABLE_H
  16. #define LLVM_OBJECT_MODULESYMBOLTABLE_H
  17.  
  18. #include "llvm/ADT/ArrayRef.h"
  19. #include "llvm/ADT/PointerUnion.h"
  20. #include "llvm/IR/Mangler.h"
  21. #include "llvm/Object/SymbolicFile.h"
  22. #include "llvm/Support/Allocator.h"
  23. #include <cstdint>
  24. #include <string>
  25. #include <utility>
  26. #include <vector>
  27.  
  28. namespace llvm {
  29.  
  30. class GlobalValue;
  31. class Module;
  32.  
  33. class ModuleSymbolTable {
  34. public:
  35.   using AsmSymbol = std::pair<std::string, uint32_t>;
  36.   using Symbol = PointerUnion<GlobalValue *, AsmSymbol *>;
  37.  
  38. private:
  39.   Module *FirstMod = nullptr;
  40.  
  41.   SpecificBumpPtrAllocator<AsmSymbol> AsmSymbols;
  42.   std::vector<Symbol> SymTab;
  43.   Mangler Mang;
  44.  
  45. public:
  46.   ArrayRef<Symbol> symbols() const { return SymTab; }
  47.   void addModule(Module *M);
  48.  
  49.   void printSymbolName(raw_ostream &OS, Symbol S) const;
  50.   uint32_t getSymbolFlags(Symbol S) const;
  51.  
  52.   /// Parse inline ASM and collect the symbols that are defined or referenced in
  53.   /// the current module.
  54.   ///
  55.   /// For each found symbol, call \p AsmSymbol with the name of the symbol found
  56.   /// and the associated flags.
  57.   static void CollectAsmSymbols(
  58.       const Module &M,
  59.       function_ref<void(StringRef, object::BasicSymbolRef::Flags)> AsmSymbol);
  60.  
  61.   /// Parse inline ASM and collect the symvers directives that are defined in
  62.   /// the current module.
  63.   ///
  64.   /// For each found symbol, call \p AsmSymver with the name of the symbol and
  65.   /// its alias.
  66.   static void
  67.   CollectAsmSymvers(const Module &M,
  68.                     function_ref<void(StringRef, StringRef)> AsmSymver);
  69. };
  70.  
  71. } // end namespace llvm
  72.  
  73. #endif // LLVM_OBJECT_MODULESYMBOLTABLE_H
  74.