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 32 class ModuleSymbolTable { 33 public: 34 using AsmSymbol = std::pair<std::string, uint32_t>; 35 using Symbol = PointerUnion<GlobalValue *, AsmSymbol *>; 36 37 private: 38 Module *FirstMod = nullptr; 39 40 SpecificBumpPtrAllocator<AsmSymbol> AsmSymbols; 41 std::vector<Symbol> SymTab; 42 Mangler Mang; 43 44 public: symbols()45 ArrayRef<Symbol> symbols() const { return SymTab; } 46 void addModule(Module *M); 47 48 void printSymbolName(raw_ostream &OS, Symbol S) const; 49 uint32_t getSymbolFlags(Symbol S) const; 50 51 /// Parse inline ASM and collect the symbols that are defined or referenced in 52 /// the current module. 53 /// 54 /// For each found symbol, call \p AsmSymbol with the name of the symbol found 55 /// and the associated flags. 56 static void CollectAsmSymbols( 57 const Module &M, 58 function_ref<void(StringRef, object::BasicSymbolRef::Flags)> AsmSymbol); 59 60 /// Parse inline ASM and collect the symvers directives that are defined in 61 /// the current module. 62 /// 63 /// For each found symbol, call \p AsmSymver with the name of the symbol and 64 /// its alias. 65 static void 66 CollectAsmSymvers(const Module &M, 67 function_ref<void(StringRef, StringRef)> AsmSymver); 68 }; 69 70 } // end namespace llvm 71 72 #endif // LLVM_OBJECT_MODULESYMBOLTABLE_H 73