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1//===- SymbolTable.h --------------------------------------------*- 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-exception6//7//===----------------------------------------------------------------------===//8 9#ifndef LLD_MACHO_SYMBOL_TABLE_H10#define LLD_MACHO_SYMBOL_TABLE_H11 12#include "Symbols.h"13 14#include "lld/Common/LLVM.h"15#include "llvm/ADT/CachedHashString.h"16#include "llvm/ADT/DenseMap.h"17#include "llvm/Object/Archive.h"18 19namespace lld::macho {20 21class ArchiveFile;22class DylibFile;23class InputFile;24class ObjFile;25class InputSection;26class MachHeaderSection;27class Symbol;28class Defined;29class Undefined;30 31/*32 * Note that the SymbolTable handles name collisions by calling33 * replaceSymbol(), which does an in-place update of the Symbol via `placement34 * new`. Therefore, there is no need to update any relocations that hold35 * pointers the "old" Symbol -- they will automatically point to the new one.36 */37class SymbolTable {38public:39 Defined *addDefined(StringRef name, InputFile *, InputSection *,40 uint64_t value, uint64_t size, bool isWeakDef,41 bool isPrivateExtern, bool isReferencedDynamically,42 bool noDeadStrip, bool isWeakDefCanBeHidden);43 44 Defined *aliasDefined(Defined *src, StringRef target, InputFile *newFile,45 bool makePrivateExtern = false);46 47 Symbol *addUndefined(StringRef name, InputFile *, bool isWeakRef);48 49 Symbol *addCommon(StringRef name, InputFile *, uint64_t size, uint32_t align,50 bool isPrivateExtern);51 52 Symbol *addDylib(StringRef name, DylibFile *file, bool isWeakDef, bool isTlv);53 Symbol *addDynamicLookup(StringRef name);54 55 Symbol *addLazyArchive(StringRef name, ArchiveFile *file,56 const llvm::object::Archive::Symbol &sym);57 Symbol *addLazyObject(StringRef name, InputFile &file);58 59 Defined *addSynthetic(StringRef name, InputSection *, uint64_t value,60 bool isPrivateExtern, bool includeInSymtab,61 bool referencedDynamically);62 63 ArrayRef<Symbol *> getSymbols() const { return symVector; }64 Symbol *find(llvm::CachedHashStringRef name);65 Symbol *find(StringRef name) { return find(llvm::CachedHashStringRef(name)); }66 67private:68 std::pair<Symbol *, bool> insert(StringRef name, const InputFile *);69 llvm::DenseMap<llvm::CachedHashStringRef, int> symMap;70 std::vector<Symbol *> symVector;71};72 73void reportPendingUndefinedSymbols();74void reportPendingDuplicateSymbols();75 76// Call reportPendingUndefinedSymbols() to emit diagnostics.77void treatUndefinedSymbol(const Undefined &, StringRef source);78void treatUndefinedSymbol(const Undefined &, const InputSection *,79 uint64_t offset);80 81extern std::unique_ptr<SymbolTable> symtab;82 83} // namespace lld::macho84 85#endif86