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