src/llvm/include/llvm/Object/ObjectFile.h

   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 inline 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 inline 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   DataRefImpl getRawDataRefImpl() const;
 131 };
 132 typedef content_iterator<RelocationRef> relocation_iterator;
 133
 134 /// SectionRef - This is a value type class that represents a single section in
 135 /// the list of sections in the object file.
 136 class SectionRef {
 137   friend class SymbolRef;
 138   DataRefImpl SectionPimpl;
 139   const ObjectFile *OwningObject;
 140
 141 public:
 142   SectionRef() : OwningObject(NULL) { }
 143
 144   SectionRef(DataRefImpl SectionP, const ObjectFile *Owner);
 145
 146   bool operator==(const SectionRef &Other) const;
 147   bool operator <(const SectionRef &Other) const;
 148
 149   error_code getNext(SectionRef &Result) const;
 150
 151   error_code getName(StringRef &Result) const;
 152   error_code getAddress(uint64_t &Result) const;
 153   error_code getSize(uint64_t &Result) const;
 154   error_code getContents(StringRef &Result) const;
 155
 156   /// @brief Get the alignment of this section as the actual value (not log 2).
 157   error_code getAlignment(uint64_t &Result) const;
 158
 159   // FIXME: Move to the normalization layer when it's created.
 160   error_code isText(bool &Result) const;
 161   error_code isData(bool &Result) const;
 162   error_code isBSS(bool &Result) const;
 163   error_code isRequiredForExecution(bool &Result) const;
 164   error_code isVirtual(bool &Result) const;
 165   error_code isZeroInit(bool &Result) const;
 166
 167   error_code containsSymbol(SymbolRef S, bool &Result) const;
 168
 169   relocation_iterator begin_relocations() const;
 170   relocation_iterator end_relocations() const;
 171
 172   DataRefImpl getRawDataRefImpl() const;
 173 };
 174 typedef content_iterator<SectionRef> section_iterator;
 175
 176 /// SymbolRef - This is a value type class that represents a single symbol in
 177 /// the list of symbols in the object file.
 178 class SymbolRef {
 179   friend class SectionRef;
 180   DataRefImpl SymbolPimpl;
 181   const ObjectFile *OwningObject;
 182
 183 public:
 184   SymbolRef() : OwningObject(NULL) { }
 185
 186   enum Type {
 187     ST_Unknown, // Type not specified
 188     ST_Data,
 189     ST_Debug,
 190     ST_File,
 191     ST_Function,
 192     ST_Other
 193   };
 194
 195   enum Flags {
 196     SF_None            = 0,
 197     SF_Undefined       = 1U << 0,  // Symbol is defined in another object file
 198     SF_Global          = 1U << 1,  // Global symbol
 199     SF_Weak            = 1U << 2,  // Weak symbol
 200     SF_Absolute        = 1U << 3,  // Absolute symbol
 201     SF_ThreadLocal     = 1U << 4,  // Thread local symbol
 202     SF_Common          = 1U << 5,  // Symbol has common linkage
 203     SF_FormatSpecific  = 1U << 31  // Specific to the object file format
 204                                    // (e.g. section symbols)
 205   };
 206
 207   SymbolRef(DataRefImpl SymbolP, const ObjectFile *Owner);
 208
 209   bool operator==(const SymbolRef &Other) const;
 210   bool operator <(const SymbolRef &Other) const;
 211
 212   error_code getNext(SymbolRef &Result) const;
 213
 214   error_code getName(StringRef &Result) const;
 215   /// Returns the symbol virtual address (i.e. address at which it will be
 216   /// mapped).
 217   error_code getAddress(uint64_t &Result) const;
 218   error_code getFileOffset(uint64_t &Result) const;
 219   error_code getSize(uint64_t &Result) const;
 220   error_code getType(SymbolRef::Type &Result) const;
 221
 222   /// Returns the ascii char that should be displayed in a symbol table dump via
 223   /// nm for this symbol.
 224   error_code getNMTypeChar(char &Result) const;
 225
 226   /// Get symbol flags (bitwise OR of SymbolRef::Flags)
 227   error_code getFlags(uint32_t &Result) const;
 228
 229   /// @brief Return true for common symbols such as uninitialized globals
 230   error_code isCommon(bool &Result) const;
 231
 232   /// @brief Get section this symbol is defined in reference to. Result is
 233   /// end_sections() if it is undefined or is an absolute symbol.
 234   error_code getSection(section_iterator &Result) const;
 235
 236   DataRefImpl getRawDataRefImpl() const;
 237 };
 238 typedef content_iterator<SymbolRef> symbol_iterator;
 239
 240 /// LibraryRef - This is a value type class that represents a single library in
 241 /// the list of libraries needed by a shared or dynamic object.
 242 class LibraryRef {
 243   friend class SectionRef;
 244   DataRefImpl LibraryPimpl;
 245   const ObjectFile *OwningObject;
 246
 247 public:
 248   LibraryRef() : OwningObject(NULL) { }
 249
 250   LibraryRef(DataRefImpl LibraryP, const ObjectFile *Owner);
 251
 252   bool operator==(const LibraryRef &Other) const;
 253   bool operator <(const LibraryRef &Other) const;
 254
 255   error_code getNext(LibraryRef &Result) const;
 256
 257   // Get the path to this library, as stored in the object file.
 258   error_code getPath(StringRef &Result) const;
 259
 260   DataRefImpl getRawDataRefImpl() const;
 261 };
 262 typedef content_iterator<LibraryRef> library_iterator;
 263
 264 const uint64_t UnknownAddressOrSize = ~0ULL;
 265
 266 /// ObjectFile - This class is the base class for all object file types.
 267 /// Concrete instances of this object are created by createObjectFile, which
 268 /// figure out which type to create.
 269 class ObjectFile : public Binary {
 270   virtual void anchor();
 271   ObjectFile() LLVM_DELETED_FUNCTION;
 272   ObjectFile(const ObjectFile &other) LLVM_DELETED_FUNCTION;
 273
 274 protected:
 275   ObjectFile(unsigned int Type, MemoryBuffer *source, error_code &ec);
 276
 277   const uint8_t *base() const {
 278     return reinterpret_cast<const uint8_t *>(Data->getBufferStart());
 279   }
 280
 281   // These functions are for SymbolRef to call internally. The main goal of
 282   // this is to allow SymbolRef::SymbolPimpl to point directly to the symbol
 283   // entry in the memory mapped object file. SymbolPimpl cannot contain any
 284   // virtual functions because then it could not point into the memory mapped
 285   // file.
 286   //
 287   // Implementations assume that the DataRefImpl is valid and has not been
 288   // modified externally. It's UB otherwise.
 289   friend class SymbolRef;
 290   virtual error_code getSymbolNext(DataRefImpl Symb, SymbolRef &Res) const = 0;
 291   virtual error_code getSymbolName(DataRefImpl Symb, StringRef &Res) const = 0;
 292   virtual error_code getSymbolAddress(DataRefImpl Symb, uint64_t &Res) const =0;
 293   virtual error_code getSymbolFileOffset(DataRefImpl Symb, uint64_t &Res) const =0;
 294   virtual error_code getSymbolSize(DataRefImpl Symb, uint64_t &Res) const = 0;
 295   virtual error_code getSymbolType(DataRefImpl Symb,
 296                                    SymbolRef::Type &Res) const = 0;
 297   virtual error_code getSymbolNMTypeChar(DataRefImpl Symb, char &Res) const = 0;
 298   virtual error_code getSymbolFlags(DataRefImpl Symb,
 299                                     uint32_t &Res) const = 0;
 300   virtual error_code getSymbolSection(DataRefImpl Symb,
 301                                       section_iterator &Res) const = 0;
 302
 303   // Same as above for SectionRef.
 304   friend class SectionRef;
 305   virtual error_code getSectionNext(DataRefImpl Sec, SectionRef &Res) const = 0;
 306   virtual error_code getSectionName(DataRefImpl Sec, StringRef &Res) const = 0;
 307   virtual error_code getSectionAddress(DataRefImpl Sec, uint64_t &Res) const =0;
 308   virtual error_code getSectionSize(DataRefImpl Sec, uint64_t &Res) const = 0;
 309   virtual error_code getSectionContents(DataRefImpl Sec, StringRef &Res)const=0;
 310   virtual error_code getSectionAlignment(DataRefImpl Sec, uint64_t &Res)const=0;
 311   virtual error_code isSectionText(DataRefImpl Sec, bool &Res) const = 0;
 312   virtual error_code isSectionData(DataRefImpl Sec, bool &Res) const = 0;
 313   virtual error_code isSectionBSS(DataRefImpl Sec, bool &Res) const = 0;
 314   virtual error_code isSectionRequiredForExecution(DataRefImpl Sec,
 315                                                    bool &Res) const = 0;
 316   // A section is 'virtual' if its contents aren't present in the object image.
 317   virtual error_code isSectionVirtual(DataRefImpl Sec, bool &Res) const = 0;
 318   virtual error_code isSectionZeroInit(DataRefImpl Sec, bool &Res) const = 0;
 319   virtual error_code sectionContainsSymbol(DataRefImpl Sec, DataRefImpl Symb,
 320                                            bool &Result) const = 0;
 321   virtual relocation_iterator getSectionRelBegin(DataRefImpl Sec) const = 0;
 322   virtual relocation_iterator getSectionRelEnd(DataRefImpl Sec) const = 0;
 323
 324
 325   // Same as above for RelocationRef.
 326   friend class RelocationRef;
 327   virtual error_code getRelocationNext(DataRefImpl Rel,
 328                                        RelocationRef &Res) const = 0;
 329   virtual error_code getRelocationAddress(DataRefImpl Rel,
 330                                           uint64_t &Res) const =0;
 331   virtual error_code getRelocationOffset(DataRefImpl Rel,
 332                                          uint64_t &Res) const =0;
 333   virtual error_code getRelocationSymbol(DataRefImpl Rel,
 334                                          SymbolRef &Res) const = 0;
 335   virtual error_code getRelocationType(DataRefImpl Rel,
 336                                        uint64_t &Res) const = 0;
 337   virtual error_code getRelocationTypeName(DataRefImpl Rel,
 338                                        SmallVectorImpl<char> &Result) const = 0;
 339   virtual error_code getRelocationAdditionalInfo(DataRefImpl Rel,
 340                                                  int64_t &Res) const = 0;
 341   virtual error_code getRelocationValueString(DataRefImpl Rel,
 342                                        SmallVectorImpl<char> &Result) const = 0;
 343   virtual error_code getRelocationHidden(DataRefImpl Rel, bool &Result) const {
 344     Result = false;
 345     return object_error::success;
 346   }
 347
 348   // Same for LibraryRef
 349   friend class LibraryRef;
 350   virtual error_code getLibraryNext(DataRefImpl Lib, LibraryRef &Res) const = 0;
 351   virtual error_code getLibraryPath(DataRefImpl Lib, StringRef &Res) const = 0;
 352
 353 public:
 354
 355   virtual symbol_iterator begin_symbols() const = 0;
 356   virtual symbol_iterator end_symbols() const = 0;
 357
 358   virtual symbol_iterator begin_dynamic_symbols() const = 0;
 359   virtual symbol_iterator end_dynamic_symbols() const = 0;
 360
 361   virtual section_iterator begin_sections() const = 0;
 362   virtual section_iterator end_sections() const = 0;
 363
 364   virtual library_iterator begin_libraries_needed() const = 0;
 365   virtual library_iterator end_libraries_needed() const = 0;
 366
 367   /// @brief The number of bytes used to represent an address in this object
 368   ///        file format.
 369   virtual uint8_t getBytesInAddress() const = 0;
 370
 371   virtual StringRef getFileFormatName() const = 0;
 372   virtual /* Triple::ArchType */ unsigned getArch() const = 0;
 373
 374   /// For shared objects, returns the name which this object should be
 375   /// loaded from at runtime. This corresponds to DT_SONAME on ELF and
 376   /// LC_ID_DYLIB (install name) on MachO.
 377   virtual StringRef getLoadName() const = 0;
 378
 379   /// @returns Pointer to ObjectFile subclass to handle this type of object.
 380   /// @param ObjectPath The path to the object file. ObjectPath.isObject must
 381   ///        return true.
 382   /// @brief Create ObjectFile from path.
 383   static ObjectFile *createObjectFile(StringRef ObjectPath);
 384   static ObjectFile *createObjectFile(MemoryBuffer *Object);
 385
 386   static inline bool classof(const Binary *v) {
 387     return v->isObject();
 388   }
 389   static inline bool classof(const ObjectFile *v) { return true; }
 390
 391 public:
 392   static ObjectFile *createCOFFObjectFile(MemoryBuffer *Object);
 393   static ObjectFile *createELFObjectFile(MemoryBuffer *Object);
 394   static ObjectFile *createMachOObjectFile(MemoryBuffer *Object);
 395 };
 396
 397 // Inline function definitions.
 398 inline SymbolRef::SymbolRef(DataRefImpl SymbolP, const ObjectFile *Owner)
 399   : SymbolPimpl(SymbolP)
 400   , OwningObject(Owner) {}
 401
 402 inline bool SymbolRef::operator==(const SymbolRef &Other) const {
 403   return SymbolPimpl == Other.SymbolPimpl;
 404 }
 405
 406 inline bool SymbolRef::operator <(const SymbolRef &Other) const {
 407   return SymbolPimpl < Other.SymbolPimpl;
 408 }
 409
 410 inline error_code SymbolRef::getNext(SymbolRef &Result) const {
 411   return OwningObject->getSymbolNext(SymbolPimpl, Result);
 412 }
 413
 414 inline error_code SymbolRef::getName(StringRef &Result) const {
 415   return OwningObject->getSymbolName(SymbolPimpl, Result);
 416 }
 417
 418 inline error_code SymbolRef::getAddress(uint64_t &Result) const {
 419   return OwningObject->getSymbolAddress(SymbolPimpl, Result);
 420 }
 421
 422 inline error_code SymbolRef::getFileOffset(uint64_t &Result) const {
 423   return OwningObject->getSymbolFileOffset(SymbolPimpl, Result);
 424 }
 425
 426 inline error_code SymbolRef::getSize(uint64_t &Result) const {
 427   return OwningObject->getSymbolSize(SymbolPimpl, Result);
 428 }
 429
 430 inline error_code SymbolRef::getNMTypeChar(char &Result) const {
 431   return OwningObject->getSymbolNMTypeChar(SymbolPimpl, Result);
 432 }
 433
 434 inline error_code SymbolRef::getFlags(uint32_t &Result) const {
 435   return OwningObject->getSymbolFlags(SymbolPimpl, Result);
 436 }
 437
 438 inline error_code SymbolRef::getSection(section_iterator &Result) const {
 439   return OwningObject->getSymbolSection(SymbolPimpl, Result);
 440 }
 441
 442 inline error_code SymbolRef::getType(SymbolRef::Type &Result) const {
 443   return OwningObject->getSymbolType(SymbolPimpl, Result);
 444 }
 445
 446 inline DataRefImpl SymbolRef::getRawDataRefImpl() const {
 447   return SymbolPimpl;
 448 }
 449
 450
 451 /// SectionRef
 452 inline SectionRef::SectionRef(DataRefImpl SectionP,
 453                               const ObjectFile *Owner)
 454   : SectionPimpl(SectionP)
 455   , OwningObject(Owner) {}
 456
 457 inline bool SectionRef::operator==(const SectionRef &Other) const {
 458   return SectionPimpl == Other.SectionPimpl;
 459 }
 460
 461 inline bool SectionRef::operator <(const SectionRef &Other) const {
 462   return SectionPimpl < Other.SectionPimpl;
 463 }
 464
 465 inline error_code SectionRef::getNext(SectionRef &Result) const {
 466   return OwningObject->getSectionNext(SectionPimpl, Result);
 467 }
 468
 469 inline error_code SectionRef::getName(StringRef &Result) const {
 470   return OwningObject->getSectionName(SectionPimpl, Result);
 471 }
 472
 473 inline error_code SectionRef::getAddress(uint64_t &Result) const {
 474   return OwningObject->getSectionAddress(SectionPimpl, Result);
 475 }
 476
 477 inline error_code SectionRef::getSize(uint64_t &Result) const {
 478   return OwningObject->getSectionSize(SectionPimpl, Result);
 479 }
 480
 481 inline error_code SectionRef::getContents(StringRef &Result) const {
 482   return OwningObject->getSectionContents(SectionPimpl, Result);
 483 }
 484
 485 inline error_code SectionRef::getAlignment(uint64_t &Result) const {
 486   return OwningObject->getSectionAlignment(SectionPimpl, Result);
 487 }
 488
 489 inline error_code SectionRef::isText(bool &Result) const {
 490   return OwningObject->isSectionText(SectionPimpl, Result);
 491 }
 492
 493 inline error_code SectionRef::isData(bool &Result) const {
 494   return OwningObject->isSectionData(SectionPimpl, Result);
 495 }
 496
 497 inline error_code SectionRef::isBSS(bool &Result) const {
 498   return OwningObject->isSectionBSS(SectionPimpl, Result);
 499 }
 500
 501 inline error_code SectionRef::isRequiredForExecution(bool &Result) const {
 502   return OwningObject->isSectionRequiredForExecution(SectionPimpl, Result);
 503 }
 504
 505 inline error_code SectionRef::isVirtual(bool &Result) const {
 506   return OwningObject->isSectionVirtual(SectionPimpl, Result);
 507 }
 508
 509 inline error_code SectionRef::isZeroInit(bool &Result) const {
 510   return OwningObject->isSectionZeroInit(SectionPimpl, Result);
 511 }
 512
 513 inline error_code SectionRef::containsSymbol(SymbolRef S, bool &Result) const {
 514   return OwningObject->sectionContainsSymbol(SectionPimpl, S.SymbolPimpl,
 515                                              Result);
 516 }
 517
 518 inline relocation_iterator SectionRef::begin_relocations() const {
 519   return OwningObject->getSectionRelBegin(SectionPimpl);
 520 }
 521
 522 inline relocation_iterator SectionRef::end_relocations() const {
 523   return OwningObject->getSectionRelEnd(SectionPimpl);
 524 }
 525
 526 inline DataRefImpl SectionRef::getRawDataRefImpl() const {
 527   return SectionPimpl;
 528 }
 529
 530 /// RelocationRef
 531 inline RelocationRef::RelocationRef(DataRefImpl RelocationP,
 532                               const ObjectFile *Owner)
 533   : RelocationPimpl(RelocationP)
 534   , OwningObject(Owner) {}
 535
 536 inline bool RelocationRef::operator==(const RelocationRef &Other) const {
 537   return RelocationPimpl == Other.RelocationPimpl;
 538 }
 539
 540 inline error_code RelocationRef::getNext(RelocationRef &Result) const {
 541   return OwningObject->getRelocationNext(RelocationPimpl, Result);
 542 }
 543
 544 inline error_code RelocationRef::getAddress(uint64_t &Result) const {
 545   return OwningObject->getRelocationAddress(RelocationPimpl, Result);
 546 }
 547
 548 inline error_code RelocationRef::getOffset(uint64_t &Result) const {
 549   return OwningObject->getRelocationOffset(RelocationPimpl, Result);
 550 }
 551
 552 inline error_code RelocationRef::getSymbol(SymbolRef &Result) const {
 553   return OwningObject->getRelocationSymbol(RelocationPimpl, Result);
 554 }
 555
 556 inline error_code RelocationRef::getType(uint64_t &Result) const {
 557   return OwningObject->getRelocationType(RelocationPimpl, Result);
 558 }
 559
 560 inline error_code RelocationRef::getTypeName(SmallVectorImpl<char> &Result)
 561   const {
 562   return OwningObject->getRelocationTypeName(RelocationPimpl, Result);
 563 }
 564
 565 inline error_code RelocationRef::getAdditionalInfo(int64_t &Result) const {
 566   return OwningObject->getRelocationAdditionalInfo(RelocationPimpl, Result);
 567 }
 568
 569 inline error_code RelocationRef::getValueString(SmallVectorImpl<char> &Result)
 570   const {
 571   return OwningObject->getRelocationValueString(RelocationPimpl, Result);
 572 }
 573
 574 inline error_code RelocationRef::getHidden(bool &Result) const {
 575   return OwningObject->getRelocationHidden(RelocationPimpl, Result);
 576 }
 577
 578 inline DataRefImpl RelocationRef::getRawDataRefImpl() const {
 579   return RelocationPimpl;
 580 }
 581
 582 // Inline function definitions.
 583 inline LibraryRef::LibraryRef(DataRefImpl LibraryP, const ObjectFile *Owner)
 584   : LibraryPimpl(LibraryP)
 585   , OwningObject(Owner) {}
 586
 587 inline bool LibraryRef::operator==(const LibraryRef &Other) const {
 588   return LibraryPimpl == Other.LibraryPimpl;
 589 }
 590
 591 inline bool LibraryRef::operator <(const LibraryRef &Other) const {
 592   return LibraryPimpl < Other.LibraryPimpl;
 593 }
 594
 595 inline error_code LibraryRef::getNext(LibraryRef &Result) const {
 596   return OwningObject->getLibraryNext(LibraryPimpl, Result);
 597 }
 598
 599 inline error_code LibraryRef::getPath(StringRef &Result) const {
 600   return OwningObject->getLibraryPath(LibraryPimpl, Result);
 601 }
 602
 603 } // end namespace object
 604 } // end namespace llvm
 605
 606 #endif