1 //===- lib/ReaderWriter/MachO/FlatNamespaceFile.h -------------------------===//
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 #ifndef LLD_READER_WRITER_MACHO_FLAT_NAMESPACE_FILE_H
10 #define LLD_READER_WRITER_MACHO_FLAT_NAMESPACE_FILE_H
11 
12 #include "Atoms.h"
13 #include "lld/Core/SharedLibraryFile.h"
14 #include "lld/ReaderWriter/MachOLinkingContext.h"
15 #include "llvm/Support/Debug.h"
16 
17 namespace lld {
18 namespace mach_o {
19 
20 //
21 // A FlateNamespaceFile instance may be added as a resolution source of last
22 // resort, depending on how -flat_namespace and -undefined are set.
23 //
24 class FlatNamespaceFile : public SharedLibraryFile {
25 public:
FlatNamespaceFile(const MachOLinkingContext & context)26   FlatNamespaceFile(const MachOLinkingContext &context)
27     : SharedLibraryFile("flat namespace") { }
28 
exports(StringRef name)29   OwningAtomPtr<SharedLibraryAtom> exports(StringRef name) const override {
30     return new (allocator()) MachOSharedLibraryAtom(*this, name, getDSOName(),
31                                                     false);
32   }
33 
getDSOName()34   StringRef getDSOName() const override { return "flat-namespace"; }
35 
defined()36   const AtomRange<DefinedAtom> defined() const override {
37     return _noDefinedAtoms;
38   }
undefined()39   const AtomRange<UndefinedAtom> undefined() const override {
40     return _noUndefinedAtoms;
41   }
42 
sharedLibrary()43   const AtomRange<SharedLibraryAtom> sharedLibrary() const override {
44     return _noSharedLibraryAtoms;
45   }
46 
absolute()47   const AtomRange<AbsoluteAtom> absolute() const override {
48     return _noAbsoluteAtoms;
49   }
50 
clearAtoms()51   void clearAtoms() override {
52     _noDefinedAtoms.clear();
53     _noUndefinedAtoms.clear();
54     _noSharedLibraryAtoms.clear();
55     _noAbsoluteAtoms.clear();
56   }
57 };
58 
59 } // namespace mach_o
60 } // namespace lld
61 
62 #endif // LLD_READER_WRITER_MACHO_FLAT_NAMESPACE_FILE_H
63