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//===- Core/SharedLibraryAtom.h - A Shared Library Atom -------------------===//
//
// 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_CORE_SHARED_LIBRARY_ATOM_H
#define LLD_CORE_SHARED_LIBRARY_ATOM_H
#include "lld/Core/Atom.h"
namespace lld {
/// A SharedLibraryAtom has no content.
/// It exists to represent a symbol which will be bound at runtime.
class SharedLibraryAtom : public Atom {
public:
enum class Type : uint32_t {
Unknown,
Code,
Data,
};
/// Returns shared library name used to load it at runtime.
/// On Darwin it is the LC_DYLIB_LOAD dylib name.
virtual StringRef loadName() const = 0;
/// Returns if shared library symbol can be missing at runtime and if
/// so the loader should silently resolve address of symbol to be nullptr.
virtual bool canBeNullAtRuntime() const = 0;
virtual Type type() const = 0;
virtual uint64_t size() const = 0;
static bool classof(const Atom *a) {
return a->definition() == definitionSharedLibrary;
}
static inline bool classof(const SharedLibraryAtom *) { return true; }
protected:
SharedLibraryAtom() : Atom(definitionSharedLibrary) {}
~SharedLibraryAtom() override = default;
};
} // namespace lld
#endif // LLD_CORE_SHARED_LIBRARY_ATOM_H
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