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      1 //===- ObjectFile.h - File format independent object file -------*- C++ -*-===//
      2 //
      3 //                     The LLVM Compiler Infrastructure
      4 //
      5 // This file is distributed under the University of Illinois Open Source
      6 // License. See LICENSE.TXT for details.
      7 //
      8 //===----------------------------------------------------------------------===//
      9 //
     10 // This file declares a file format independent ObjectFile class.
     11 //
     12 //===----------------------------------------------------------------------===//
     13 
     14 #ifndef LLVM_OBJECT_OBJECT_FILE_H
     15 #define LLVM_OBJECT_OBJECT_FILE_H
     16 
     17 #include "llvm/Object/Binary.h"
     18 #include "llvm/ADT/StringRef.h"
     19 #include "llvm/Support/DataTypes.h"
     20 #include "llvm/Support/ErrorHandling.h"
     21 #include "llvm/Support/MemoryBuffer.h"
     22 #include <cstring>
     23 #include <vector>
     24 
     25 namespace llvm {
     26 namespace object {
     27 
     28 class ObjectFile;
     29 
     30 union DataRefImpl {
     31   struct {
     32     // ELF needs this for relocations. This entire union should probably be a
     33     // char[max(8, sizeof(uintptr_t))] and require the impl to cast.
     34     uint16_t a, b;
     35     uint32_t c;
     36   } w;
     37   struct {
     38     uint32_t a, b;
     39   } d;
     40   uintptr_t p;
     41   DataRefImpl() {
     42     std::memset(this, 0, sizeof(DataRefImpl));
     43   }
     44 };
     45 
     46 template<class content_type>
     47 class content_iterator {
     48   content_type Current;
     49 public:
     50   content_iterator(content_type symb)
     51     : Current(symb) {}
     52 
     53   const content_type* operator->() const {
     54     return &Current;
     55   }
     56 
     57   const content_type &operator*() const {
     58     return Current;
     59   }
     60 
     61   bool operator==(const content_iterator &other) const {
     62     return Current == other.Current;
     63   }
     64 
     65   bool operator!=(const content_iterator &other) const {
     66     return !(*this == other);
     67   }
     68 
     69   content_iterator& increment(error_code &err) {
     70     content_type next;
     71     if (error_code ec = Current.getNext(next))
     72       err = ec;
     73     else
     74       Current = next;
     75     return *this;
     76   }
     77 };
     78 
     79 static bool operator ==(const DataRefImpl &a, const DataRefImpl &b) {
     80   // Check bitwise identical. This is the only legal way to compare a union w/o
     81   // knowing which member is in use.
     82   return std::memcmp(&a, &b, sizeof(DataRefImpl)) == 0;
     83 }
     84 
     85 static bool operator <(const DataRefImpl &a, const DataRefImpl &b) {
     86   // Check bitwise identical. This is the only legal way to compare a union w/o
     87   // knowing which member is in use.
     88   return std::memcmp(&a, &b, sizeof(DataRefImpl)) < 0;
     89 }
     90 
     91 class SymbolRef;
     92 
     93 /// RelocationRef - This is a value type class that represents a single
     94 /// relocation in the list of relocations in the object file.
     95 class RelocationRef {
     96   DataRefImpl RelocationPimpl;
     97   const ObjectFile *OwningObject;
     98 
     99 public:
    100   RelocationRef() : OwningObject(NULL) { }
    101 
    102   RelocationRef(DataRefImpl RelocationP, const ObjectFile *Owner);
    103 
    104   bool operator==(const RelocationRef &Other) const;
    105 
    106   error_code getNext(RelocationRef &Result) const;
    107 
    108   error_code getAddress(uint64_t &Result) const;
    109   error_code getOffset(uint64_t &Result) const;
    110   error_code getSymbol(SymbolRef &Result) const;
    111   error_code getType(uint64_t &Result) const;
    112 
    113   /// @brief Indicates whether this relocation should hidden when listing
    114   /// relocations, usually because it is the trailing part of a multipart
    115   /// relocation that will be printed as part of the leading relocation.
    116   error_code getHidden(bool &Result) const;
    117 
    118   /// @brief Get a string that represents the type of this relocation.
    119   ///
    120   /// This is for display purposes only.
    121   error_code getTypeName(SmallVectorImpl<char> &Result) const;
    122   error_code getAdditionalInfo(int64_t &Result) const;
    123 
    124   /// @brief Get a string that represents the calculation of the value of this
    125   ///        relocation.
    126   ///
    127   /// This is for display purposes only.
    128   error_code getValueString(SmallVectorImpl<char> &Result) const;
    129 };
    130 typedef content_iterator<RelocationRef> relocation_iterator;
    131 
    132 /// SectionRef - This is a value type class that represents a single section in
    133 /// the list of sections in the object file.
    134 class SectionRef {
    135   friend class SymbolRef;
    136   DataRefImpl SectionPimpl;
    137   const ObjectFile *OwningObject;
    138 
    139 public:
    140   SectionRef() : OwningObject(NULL) { }
    141 
    142   SectionRef(DataRefImpl SectionP, const ObjectFile *Owner);
    143 
    144   bool operator==(const SectionRef &Other) const;
    145   bool operator <(const SectionRef &Other) const;
    146 
    147   error_code getNext(SectionRef &Result) const;
    148 
    149   error_code getName(StringRef &Result) const;
    150   error_code getAddress(uint64_t &Result) const;
    151   error_code getSize(uint64_t &Result) const;
    152   error_code getContents(StringRef &Result) const;
    153 
    154   /// @brief Get the alignment of this section as the actual value (not log 2).
    155   error_code getAlignment(uint64_t &Result) const;
    156 
    157   // FIXME: Move to the normalization layer when it's created.
    158   error_code isText(bool &Result) const;
    159   error_code isData(bool &Result) const;
    160   error_code isBSS(bool &Result) const;
    161   error_code isRequiredForExecution(bool &Result) const;
    162   error_code isVirtual(bool &Result) const;
    163   error_code isZeroInit(bool &Result) const;
    164 
    165   error_code containsSymbol(SymbolRef S, bool &Result) const;
    166 
    167   relocation_iterator begin_relocations() const;
    168   relocation_iterator end_relocations() const;
    169 
    170   DataRefImpl getRawDataRefImpl() const;
    171 };
    172 typedef content_iterator<SectionRef> section_iterator;
    173 
    174 /// SymbolRef - This is a value type class that represents a single symbol in
    175 /// the list of symbols in the object file.
    176 class SymbolRef {
    177   friend class SectionRef;
    178   DataRefImpl SymbolPimpl;
    179   const ObjectFile *OwningObject;
    180 
    181 public:
    182   SymbolRef() : OwningObject(NULL) { }
    183 
    184   enum Type {
    185     ST_Unknown, // Type not specified
    186     ST_Data,
    187     ST_Debug,
    188     ST_File,
    189     ST_Function,
    190     ST_Other
    191   };
    192 
    193   enum Flags {
    194     SF_None            = 0,
    195     SF_Undefined       = 1U << 0,  // Symbol is defined in another object file
    196     SF_Global          = 1U << 1,  // Global symbol
    197     SF_Weak            = 1U << 2,  // Weak symbol
    198     SF_Absolute        = 1U << 3,  // Absolute symbol
    199     SF_ThreadLocal     = 1U << 4,  // Thread local symbol
    200     SF_Common          = 1U << 5,  // Symbol has common linkage
    201     SF_FormatSpecific  = 1U << 31  // Specific to the object file format
    202                                    // (e.g. section symbols)
    203   };
    204 
    205   SymbolRef(DataRefImpl SymbolP, const ObjectFile *Owner);
    206 
    207   bool operator==(const SymbolRef &Other) const;
    208   bool operator <(const SymbolRef &Other) const;
    209 
    210   error_code getNext(SymbolRef &Result) const;
    211 
    212   error_code getName(StringRef &Result) const;
    213   error_code getAddress(uint64_t &Result) const;
    214   error_code getFileOffset(uint64_t &Result) const;
    215   error_code getSize(uint64_t &Result) const;
    216   error_code getType(SymbolRef::Type &Result) const;
    217 
    218   /// Returns the ascii char that should be displayed in a symbol table dump via
    219   /// nm for this symbol.
    220   error_code getNMTypeChar(char &Result) const;
    221 
    222   /// Get symbol flags (bitwise OR of SymbolRef::Flags)
    223   error_code getFlags(uint32_t &Result) const;
    224 
    225   /// @brief Return true for common symbols such as uninitialized globals
    226   error_code isCommon(bool &Result) const;
    227 
    228   /// @brief Get section this symbol is defined in reference to. Result is
    229   /// end_sections() if it is undefined or is an absolute symbol.
    230   error_code getSection(section_iterator &Result) const;
    231 
    232   DataRefImpl getRawDataRefImpl() const;
    233 };
    234 typedef content_iterator<SymbolRef> symbol_iterator;
    235 
    236 /// LibraryRef - This is a value type class that represents a single library in
    237 /// the list of libraries needed by a shared or dynamic object.
    238 class LibraryRef {
    239   friend class SectionRef;
    240   DataRefImpl LibraryPimpl;
    241   const ObjectFile *OwningObject;
    242 
    243 public:
    244   LibraryRef() : OwningObject(NULL) { }
    245 
    246   LibraryRef(DataRefImpl LibraryP, const ObjectFile *Owner);
    247 
    248   bool operator==(const LibraryRef &Other) const;
    249   bool operator <(const LibraryRef &Other) const;
    250 
    251   error_code getNext(LibraryRef &Result) const;
    252 
    253   // Get the path to this library, as stored in the object file.
    254   error_code getPath(StringRef &Result) const;
    255 
    256   DataRefImpl getRawDataRefImpl() const;
    257 };
    258 typedef content_iterator<LibraryRef> library_iterator;
    259 
    260 const uint64_t UnknownAddressOrSize = ~0ULL;
    261 
    262 /// ObjectFile - This class is the base class for all object file types.
    263 /// Concrete instances of this object are created by createObjectFile, which
    264 /// figure out which type to create.
    265 class ObjectFile : public Binary {
    266   virtual void anchor();
    267   ObjectFile(); // = delete
    268   ObjectFile(const ObjectFile &other); // = delete
    269 
    270 protected:
    271   ObjectFile(unsigned int Type, MemoryBuffer *source, error_code &ec);
    272 
    273   const uint8_t *base() const {
    274     return reinterpret_cast<const uint8_t *>(Data->getBufferStart());
    275   }
    276 
    277   // These functions are for SymbolRef to call internally. The main goal of
    278   // this is to allow SymbolRef::SymbolPimpl to point directly to the symbol
    279   // entry in the memory mapped object file. SymbolPimpl cannot contain any
    280   // virtual functions because then it could not point into the memory mapped
    281   // file.
    282   //
    283   // Implementations assume that the DataRefImpl is valid and has not been
    284   // modified externally. It's UB otherwise.
    285   friend class SymbolRef;
    286   virtual error_code getSymbolNext(DataRefImpl Symb, SymbolRef &Res) const = 0;
    287   virtual error_code getSymbolName(DataRefImpl Symb, StringRef &Res) const = 0;
    288   virtual error_code getSymbolAddress(DataRefImpl Symb, uint64_t &Res) const =0;
    289   virtual error_code getSymbolFileOffset(DataRefImpl Symb, uint64_t &Res) const =0;
    290   virtual error_code getSymbolSize(DataRefImpl Symb, uint64_t &Res) const = 0;
    291   virtual error_code getSymbolType(DataRefImpl Symb,
    292                                    SymbolRef::Type &Res) const = 0;
    293   virtual error_code getSymbolNMTypeChar(DataRefImpl Symb, char &Res) const = 0;
    294   virtual error_code getSymbolFlags(DataRefImpl Symb,
    295                                     uint32_t &Res) const = 0;
    296   virtual error_code getSymbolSection(DataRefImpl Symb,
    297                                       section_iterator &Res) const = 0;
    298 
    299   // Same as above for SectionRef.
    300   friend class SectionRef;
    301   virtual error_code getSectionNext(DataRefImpl Sec, SectionRef &Res) const = 0;
    302   virtual error_code getSectionName(DataRefImpl Sec, StringRef &Res) const = 0;
    303   virtual error_code getSectionAddress(DataRefImpl Sec, uint64_t &Res) const =0;
    304   virtual error_code getSectionSize(DataRefImpl Sec, uint64_t &Res) const = 0;
    305   virtual error_code getSectionContents(DataRefImpl Sec, StringRef &Res)const=0;
    306   virtual error_code getSectionAlignment(DataRefImpl Sec, uint64_t &Res)const=0;
    307   virtual error_code isSectionText(DataRefImpl Sec, bool &Res) const = 0;
    308   virtual error_code isSectionData(DataRefImpl Sec, bool &Res) const = 0;
    309   virtual error_code isSectionBSS(DataRefImpl Sec, bool &Res) const = 0;
    310   virtual error_code isSectionRequiredForExecution(DataRefImpl Sec,
    311                                                    bool &Res) const = 0;
    312   // A section is 'virtual' if its contents aren't present in the object image.
    313   virtual error_code isSectionVirtual(DataRefImpl Sec, bool &Res) const = 0;
    314   virtual error_code isSectionZeroInit(DataRefImpl Sec, bool &Res) const = 0;
    315   virtual error_code sectionContainsSymbol(DataRefImpl Sec, DataRefImpl Symb,
    316                                            bool &Result) const = 0;
    317   virtual relocation_iterator getSectionRelBegin(DataRefImpl Sec) const = 0;
    318   virtual relocation_iterator getSectionRelEnd(DataRefImpl Sec) const = 0;
    319 
    320 
    321   // Same as above for RelocationRef.
    322   friend class RelocationRef;
    323   virtual error_code getRelocationNext(DataRefImpl Rel,
    324                                        RelocationRef &Res) const = 0;
    325   virtual error_code getRelocationAddress(DataRefImpl Rel,
    326                                           uint64_t &Res) const =0;
    327   virtual error_code getRelocationOffset(DataRefImpl Rel,
    328                                          uint64_t &Res) const =0;
    329   virtual error_code getRelocationSymbol(DataRefImpl Rel,
    330                                          SymbolRef &Res) const = 0;
    331   virtual error_code getRelocationType(DataRefImpl Rel,
    332                                        uint64_t &Res) const = 0;
    333   virtual error_code getRelocationTypeName(DataRefImpl Rel,
    334                                        SmallVectorImpl<char> &Result) const = 0;
    335   virtual error_code getRelocationAdditionalInfo(DataRefImpl Rel,
    336                                                  int64_t &Res) const = 0;
    337   virtual error_code getRelocationValueString(DataRefImpl Rel,
    338                                        SmallVectorImpl<char> &Result) const = 0;
    339   virtual error_code getRelocationHidden(DataRefImpl Rel, bool &Result) const {
    340     Result = false;
    341     return object_error::success;
    342   }
    343 
    344   // Same for LibraryRef
    345   friend class LibraryRef;
    346   virtual error_code getLibraryNext(DataRefImpl Lib, LibraryRef &Res) const = 0;
    347   virtual error_code getLibraryPath(DataRefImpl Lib, StringRef &Res) const = 0;
    348 
    349 public:
    350 
    351   virtual symbol_iterator begin_symbols() const = 0;
    352   virtual symbol_iterator end_symbols() const = 0;
    353 
    354   virtual symbol_iterator begin_dynamic_symbols() const = 0;
    355   virtual symbol_iterator end_dynamic_symbols() const = 0;
    356 
    357   virtual section_iterator begin_sections() const = 0;
    358   virtual section_iterator end_sections() const = 0;
    359 
    360   virtual library_iterator begin_libraries_needed() const = 0;
    361   virtual library_iterator end_libraries_needed() const = 0;
    362 
    363   /// @brief The number of bytes used to represent an address in this object
    364   ///        file format.
    365   virtual uint8_t getBytesInAddress() const = 0;
    366 
    367   virtual StringRef getFileFormatName() const = 0;
    368   virtual /* Triple::ArchType */ unsigned getArch() const = 0;
    369 
    370   /// For shared objects, returns the name which this object should be
    371   /// loaded from at runtime. This corresponds to DT_SONAME on ELF and
    372   /// LC_ID_DYLIB (install name) on MachO.
    373   virtual StringRef getLoadName() const = 0;
    374 
    375   /// @returns Pointer to ObjectFile subclass to handle this type of object.
    376   /// @param ObjectPath The path to the object file. ObjectPath.isObject must
    377   ///        return true.
    378   /// @brief Create ObjectFile from path.
    379   static ObjectFile *createObjectFile(StringRef ObjectPath);
    380   static ObjectFile *createObjectFile(MemoryBuffer *Object);
    381 
    382   static inline bool classof(const Binary *v) {
    383     return v->isObject();
    384   }
    385   static inline bool classof(const ObjectFile *v) { return true; }
    386 
    387 public:
    388   static ObjectFile *createCOFFObjectFile(MemoryBuffer *Object);
    389   static ObjectFile *createELFObjectFile(MemoryBuffer *Object);
    390   static ObjectFile *createMachOObjectFile(MemoryBuffer *Object);
    391 };
    392 
    393 // Inline function definitions.
    394 inline SymbolRef::SymbolRef(DataRefImpl SymbolP, const ObjectFile *Owner)
    395   : SymbolPimpl(SymbolP)
    396   , OwningObject(Owner) {}
    397 
    398 inline bool SymbolRef::operator==(const SymbolRef &Other) const {
    399   return SymbolPimpl == Other.SymbolPimpl;
    400 }
    401 
    402 inline bool SymbolRef::operator <(const SymbolRef &Other) const {
    403   return SymbolPimpl < Other.SymbolPimpl;
    404 }
    405 
    406 inline error_code SymbolRef::getNext(SymbolRef &Result) const {
    407   return OwningObject->getSymbolNext(SymbolPimpl, Result);
    408 }
    409 
    410 inline error_code SymbolRef::getName(StringRef &Result) const {
    411   return OwningObject->getSymbolName(SymbolPimpl, Result);
    412 }
    413 
    414 inline error_code SymbolRef::getAddress(uint64_t &Result) const {
    415   return OwningObject->getSymbolAddress(SymbolPimpl, Result);
    416 }
    417 
    418 inline error_code SymbolRef::getFileOffset(uint64_t &Result) const {
    419   return OwningObject->getSymbolFileOffset(SymbolPimpl, Result);
    420 }
    421 
    422 inline error_code SymbolRef::getSize(uint64_t &Result) const {
    423   return OwningObject->getSymbolSize(SymbolPimpl, Result);
    424 }
    425 
    426 inline error_code SymbolRef::getNMTypeChar(char &Result) const {
    427   return OwningObject->getSymbolNMTypeChar(SymbolPimpl, Result);
    428 }
    429 
    430 inline error_code SymbolRef::getFlags(uint32_t &Result) const {
    431   return OwningObject->getSymbolFlags(SymbolPimpl, Result);
    432 }
    433 
    434 inline error_code SymbolRef::getSection(section_iterator &Result) const {
    435   return OwningObject->getSymbolSection(SymbolPimpl, Result);
    436 }
    437 
    438 inline error_code SymbolRef::getType(SymbolRef::Type &Result) const {
    439   return OwningObject->getSymbolType(SymbolPimpl, Result);
    440 }
    441 
    442 inline DataRefImpl SymbolRef::getRawDataRefImpl() const {
    443   return SymbolPimpl;
    444 }
    445 
    446 
    447 /// SectionRef
    448 inline SectionRef::SectionRef(DataRefImpl SectionP,
    449                               const ObjectFile *Owner)
    450   : SectionPimpl(SectionP)
    451   , OwningObject(Owner) {}
    452 
    453 inline bool SectionRef::operator==(const SectionRef &Other) const {
    454   return SectionPimpl == Other.SectionPimpl;
    455 }
    456 
    457 inline bool SectionRef::operator <(const SectionRef &Other) const {
    458   return SectionPimpl < Other.SectionPimpl;
    459 }
    460 
    461 inline error_code SectionRef::getNext(SectionRef &Result) const {
    462   return OwningObject->getSectionNext(SectionPimpl, Result);
    463 }
    464 
    465 inline error_code SectionRef::getName(StringRef &Result) const {
    466   return OwningObject->getSectionName(SectionPimpl, Result);
    467 }
    468 
    469 inline error_code SectionRef::getAddress(uint64_t &Result) const {
    470   return OwningObject->getSectionAddress(SectionPimpl, Result);
    471 }
    472 
    473 inline error_code SectionRef::getSize(uint64_t &Result) const {
    474   return OwningObject->getSectionSize(SectionPimpl, Result);
    475 }
    476 
    477 inline error_code SectionRef::getContents(StringRef &Result) const {
    478   return OwningObject->getSectionContents(SectionPimpl, Result);
    479 }
    480 
    481 inline error_code SectionRef::getAlignment(uint64_t &Result) const {
    482   return OwningObject->getSectionAlignment(SectionPimpl, Result);
    483 }
    484 
    485 inline error_code SectionRef::isText(bool &Result) const {
    486   return OwningObject->isSectionText(SectionPimpl, Result);
    487 }
    488 
    489 inline error_code SectionRef::isData(bool &Result) const {
    490   return OwningObject->isSectionData(SectionPimpl, Result);
    491 }
    492 
    493 inline error_code SectionRef::isBSS(bool &Result) const {
    494   return OwningObject->isSectionBSS(SectionPimpl, Result);
    495 }
    496 
    497 inline error_code SectionRef::isRequiredForExecution(bool &Result) const {
    498   return OwningObject->isSectionRequiredForExecution(SectionPimpl, Result);
    499 }
    500 
    501 inline error_code SectionRef::isVirtual(bool &Result) const {
    502   return OwningObject->isSectionVirtual(SectionPimpl, Result);
    503 }
    504 
    505 inline error_code SectionRef::isZeroInit(bool &Result) const {
    506   return OwningObject->isSectionZeroInit(SectionPimpl, Result);
    507 }
    508 
    509 inline error_code SectionRef::containsSymbol(SymbolRef S, bool &Result) const {
    510   return OwningObject->sectionContainsSymbol(SectionPimpl, S.SymbolPimpl,
    511                                              Result);
    512 }
    513 
    514 inline relocation_iterator SectionRef::begin_relocations() const {
    515   return OwningObject->getSectionRelBegin(SectionPimpl);
    516 }
    517 
    518 inline relocation_iterator SectionRef::end_relocations() const {
    519   return OwningObject->getSectionRelEnd(SectionPimpl);
    520 }
    521 
    522 inline DataRefImpl SectionRef::getRawDataRefImpl() const {
    523   return SectionPimpl;
    524 }
    525 
    526 /// RelocationRef
    527 inline RelocationRef::RelocationRef(DataRefImpl RelocationP,
    528                               const ObjectFile *Owner)
    529   : RelocationPimpl(RelocationP)
    530   , OwningObject(Owner) {}
    531 
    532 inline bool RelocationRef::operator==(const RelocationRef &Other) const {
    533   return RelocationPimpl == Other.RelocationPimpl;
    534 }
    535 
    536 inline error_code RelocationRef::getNext(RelocationRef &Result) const {
    537   return OwningObject->getRelocationNext(RelocationPimpl, Result);
    538 }
    539 
    540 inline error_code RelocationRef::getAddress(uint64_t &Result) const {
    541   return OwningObject->getRelocationAddress(RelocationPimpl, Result);
    542 }
    543 
    544 inline error_code RelocationRef::getOffset(uint64_t &Result) const {
    545   return OwningObject->getRelocationOffset(RelocationPimpl, Result);
    546 }
    547 
    548 inline error_code RelocationRef::getSymbol(SymbolRef &Result) const {
    549   return OwningObject->getRelocationSymbol(RelocationPimpl, Result);
    550 }
    551 
    552 inline error_code RelocationRef::getType(uint64_t &Result) const {
    553   return OwningObject->getRelocationType(RelocationPimpl, Result);
    554 }
    555 
    556 inline error_code RelocationRef::getTypeName(SmallVectorImpl<char> &Result)
    557   const {
    558   return OwningObject->getRelocationTypeName(RelocationPimpl, Result);
    559 }
    560 
    561 inline error_code RelocationRef::getAdditionalInfo(int64_t &Result) const {
    562   return OwningObject->getRelocationAdditionalInfo(RelocationPimpl, Result);
    563 }
    564 
    565 inline error_code RelocationRef::getValueString(SmallVectorImpl<char> &Result)
    566   const {
    567   return OwningObject->getRelocationValueString(RelocationPimpl, Result);
    568 }
    569 
    570 inline error_code RelocationRef::getHidden(bool &Result) const {
    571   return OwningObject->getRelocationHidden(RelocationPimpl, Result);
    572 }
    573 // Inline function definitions.
    574 inline LibraryRef::LibraryRef(DataRefImpl LibraryP, const ObjectFile *Owner)
    575   : LibraryPimpl(LibraryP)
    576   , OwningObject(Owner) {}
    577 
    578 inline bool LibraryRef::operator==(const LibraryRef &Other) const {
    579   return LibraryPimpl == Other.LibraryPimpl;
    580 }
    581 
    582 inline bool LibraryRef::operator <(const LibraryRef &Other) const {
    583   return LibraryPimpl < Other.LibraryPimpl;
    584 }
    585 
    586 inline error_code LibraryRef::getNext(LibraryRef &Result) const {
    587   return OwningObject->getLibraryNext(LibraryPimpl, Result);
    588 }
    589 
    590 inline error_code LibraryRef::getPath(StringRef &Result) const {
    591   return OwningObject->getLibraryPath(LibraryPimpl, Result);
    592 }
    593 
    594 } // end namespace object
    595 } // end namespace llvm
    596 
    597 #endif
    598