1 //===- lib/ReaderWriter/MachO/FlatNamespaceFile.h -------------------------===//
2 //
3 //                             The LLVM Linker
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #ifndef LLD_READER_WRITER_MACHO_FLAT_NAMESPACE_FILE_H
11 #define LLD_READER_WRITER_MACHO_FLAT_NAMESPACE_FILE_H
12 
13 #include "Atoms.h"
14 #include "lld/Core/SharedLibraryFile.h"
15 #include "lld/ReaderWriter/MachOLinkingContext.h"
16 #include "llvm/Support/Debug.h"
17 
18 namespace lld {
19 namespace mach_o {
20 
21 //
22 // A FlateNamespaceFile instance may be added as a resolution source of last
23 // resort, depending on how -flat_namespace and -undefined are set.
24 //
25 class FlatNamespaceFile : public SharedLibraryFile {
26 public:
FlatNamespaceFile(const MachOLinkingContext & context)27   FlatNamespaceFile(const MachOLinkingContext &context)
28     : SharedLibraryFile("flat namespace") { }
29 
exports(StringRef name)30   OwningAtomPtr<SharedLibraryAtom> exports(StringRef name) const override {
31     return new (allocator()) MachOSharedLibraryAtom(*this, name, getDSOName(),
32                                                     false);
33   }
34 
getDSOName()35   StringRef getDSOName() const override { return "flat-namespace"; }
36 
defined()37   const AtomRange<DefinedAtom> defined() const override {
38     return _noDefinedAtoms;
39   }
undefined()40   const AtomRange<UndefinedAtom> undefined() const override {
41     return _noUndefinedAtoms;
42   }
43 
sharedLibrary()44   const AtomRange<SharedLibraryAtom> sharedLibrary() const override {
45     return _noSharedLibraryAtoms;
46   }
47 
absolute()48   const AtomRange<AbsoluteAtom> absolute() const override {
49     return _noAbsoluteAtoms;
50   }
51 
clearAtoms()52   void clearAtoms() override {
53     _noDefinedAtoms.clear();
54     _noUndefinedAtoms.clear();
55     _noSharedLibraryAtoms.clear();
56     _noAbsoluteAtoms.clear();
57   }
58 };
59 
60 } // namespace mach_o
61 } // namespace lld
62 
63 #endif // LLD_READER_WRITER_MACHO_FLAT_NAMESPACE_FILE_H
64