forked from OSchip/llvm-project
80 lines
2.6 KiB
C++
80 lines
2.6 KiB
C++
//===- SymbolTable.h --------------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLD_MACHO_SYMBOL_TABLE_H
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#define LLD_MACHO_SYMBOL_TABLE_H
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#include "Symbols.h"
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#include "lld/Common/LLVM.h"
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#include "llvm/ADT/CachedHashString.h"
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/Object/Archive.h"
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namespace lld {
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namespace macho {
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class ArchiveFile;
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class DylibFile;
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class InputFile;
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class ObjFile;
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class InputSection;
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class MachHeaderSection;
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class Symbol;
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class Defined;
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class Undefined;
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/*
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* Note that the SymbolTable handles name collisions by calling
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* replaceSymbol(), which does an in-place update of the Symbol via `placement
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* new`. Therefore, there is no need to update any relocations that hold
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* pointers the "old" Symbol -- they will automatically point to the new one.
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*/
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class SymbolTable {
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public:
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Defined *addDefined(StringRef name, InputFile *, InputSection *,
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uint64_t value, uint64_t size, bool isWeakDef,
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bool isPrivateExtern, bool isThumb,
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bool isReferencedDynamically, bool noDeadStrip,
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bool isWeakDefCanBeHidden);
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Symbol *addUndefined(StringRef name, InputFile *, bool isWeakRef);
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Symbol *addCommon(StringRef name, InputFile *, uint64_t size, uint32_t align,
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bool isPrivateExtern);
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Symbol *addDylib(StringRef name, DylibFile *file, bool isWeakDef, bool isTlv);
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Symbol *addDynamicLookup(StringRef name);
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Symbol *addLazyArchive(StringRef name, ArchiveFile *file,
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const llvm::object::Archive::Symbol &sym);
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Symbol *addLazyObject(StringRef name, InputFile &file);
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Defined *addSynthetic(StringRef name, InputSection *, uint64_t value,
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bool isPrivateExtern, bool includeInSymtab,
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bool referencedDynamically);
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ArrayRef<Symbol *> getSymbols() const { return symVector; }
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Symbol *find(llvm::CachedHashStringRef name);
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Symbol *find(StringRef name) { return find(llvm::CachedHashStringRef(name)); }
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private:
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std::pair<Symbol *, bool> insert(StringRef name, const InputFile *);
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llvm::DenseMap<llvm::CachedHashStringRef, int> symMap;
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std::vector<Symbol *> symVector;
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};
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void treatUndefinedSymbol(const Undefined &, StringRef source = "");
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extern std::unique_ptr<SymbolTable> symtab;
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} // namespace macho
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} // namespace lld
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#endif
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