src/llvm/include/llvm/Object/Binary.h

   1 //===- Binary.h - A generic binary 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 the Binary class.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #ifndef LLVM_OBJECT_BINARY_H
  15 #define LLVM_OBJECT_BINARY_H
  16
  17 #include "llvm/Object/Error.h"
  18 #include "llvm/Support/ErrorOr.h"
  19 #include "llvm/Support/FileSystem.h"
  20 #include "llvm/Support/MemoryBuffer.h"
  21
  22 namespace llvm {
  23
  24 class LLVMContext;
  25 class StringRef;
  26
  27 namespace object {
  28
  29 class Binary {
  30 private:
  31   Binary() LLVM_DELETED_FUNCTION;
  32   Binary(const Binary &other) LLVM_DELETED_FUNCTION;
  33
  34   unsigned int TypeID;
  35
  36 protected:
  37   MemoryBufferRef Data;
  38
  39   Binary(unsigned int Type, MemoryBufferRef Source);
  40
  41   enum {
  42     ID_Archive,
  43     ID_MachOUniversalBinary,
  44     ID_IR, // LLVM IR
  45
  46     // Object and children.
  47     ID_StartObjects,
  48     ID_COFF,
  49
  50     ID_ELF32L, // ELF 32-bit, little endian
  51     ID_ELF32B, // ELF 32-bit, big endian
  52     ID_ELF64L, // ELF 64-bit, little endian
  53     ID_ELF64B, // ELF 64-bit, big endian
  54
  55     ID_MachO32L, // MachO 32-bit, little endian
  56     ID_MachO32B, // MachO 32-bit, big endian
  57     ID_MachO64L, // MachO 64-bit, little endian
  58     ID_MachO64B, // MachO 64-bit, big endian
  59
  60     ID_EndObjects
  61   };
  62
  63   static inline unsigned int getELFType(bool isLE, bool is64Bits) {
  64     if (isLE)
  65       return is64Bits ? ID_ELF64L : ID_ELF32L;
  66     else
  67       return is64Bits ? ID_ELF64B : ID_ELF32B;
  68   }
  69
  70   static unsigned int getMachOType(bool isLE, bool is64Bits) {
  71     if (isLE)
  72       return is64Bits ? ID_MachO64L : ID_MachO32L;
  73     else
  74       return is64Bits ? ID_MachO64B : ID_MachO32B;
  75   }
  76
  77 public:
  78   virtual ~Binary();
  79
  80   StringRef getData() const;
  81   StringRef getFileName() const;
  82   MemoryBufferRef getMemoryBufferRef() const;
  83
  84   // Cast methods.
  85   unsigned int getType() const { return TypeID; }
  86
  87   // Convenience methods
  88   bool isObject() const {
  89     return TypeID > ID_StartObjects && TypeID < ID_EndObjects;
  90   }
  91
  92   bool isSymbolic() const {
  93     return isIR() || isObject();
  94   }
  95
  96   bool isArchive() const {
  97     return TypeID == ID_Archive;
  98   }
  99
 100   bool isMachOUniversalBinary() const {
 101     return TypeID == ID_MachOUniversalBinary;
 102   }
 103
 104   bool isELF() const {
 105     return TypeID >= ID_ELF32L && TypeID <= ID_ELF64B;
 106   }
 107
 108   bool isMachO() const {
 109     return TypeID >= ID_MachO32L && TypeID <= ID_MachO64B;
 110   }
 111
 112   bool isCOFF() const {
 113     return TypeID == ID_COFF;
 114   }
 115
 116   bool isIR() const {
 117     return TypeID == ID_IR;
 118   }
 119
 120   bool isLittleEndian() const {
 121     return !(TypeID == ID_ELF32B || TypeID == ID_ELF64B ||
 122              TypeID == ID_MachO32B || TypeID == ID_MachO64B);
 123   }
 124 };
 125
 126 /// @brief Create a Binary from Source, autodetecting the file type.
 127 ///
 128 /// @param Source The data to create the Binary from.
 129 ErrorOr<std::unique_ptr<Binary>> createBinary(MemoryBufferRef Source,
 130                                               LLVMContext *Context = nullptr);
 131
 132 template <typename T> class OwningBinary {
 133   std::unique_ptr<T> Bin;
 134   std::unique_ptr<MemoryBuffer> Buf;
 135
 136 public:
 137   OwningBinary();
 138   OwningBinary(std::unique_ptr<T> Bin, std::unique_ptr<MemoryBuffer> Buf);
 139   OwningBinary(OwningBinary<T>&& Other);
 140   OwningBinary<T> &operator=(OwningBinary<T> &&Other);
 141
 142   std::unique_ptr<T> &getBinary();
 143   std::unique_ptr<MemoryBuffer> &getBuffer();
 144 };
 145
 146 template <typename T>
 147 OwningBinary<T>::OwningBinary(std::unique_ptr<T> Bin,
 148                               std::unique_ptr<MemoryBuffer> Buf)
 149     : Bin(std::move(Bin)), Buf(std::move(Buf)) {}
 150
 151 template <typename T> OwningBinary<T>::OwningBinary() {}
 152
 153 template <typename T>
 154 OwningBinary<T>::OwningBinary(OwningBinary &&Other)
 155     : Bin(std::move(Other.Bin)), Buf(std::move(Other.Buf)) {}
 156
 157 template <typename T>
 158 OwningBinary<T> &OwningBinary<T>::operator=(OwningBinary &&Other) {
 159   Bin = std::move(Other.Bin);
 160   Buf = std::move(Other.Buf);
 161   return *this;
 162 }
 163
 164 template <typename T> std::unique_ptr<T> &OwningBinary<T>::getBinary() {
 165   return Bin;
 166 }
 167
 168 template <typename T>
 169 std::unique_ptr<MemoryBuffer> &OwningBinary<T>::getBuffer() {
 170   return Buf;
 171 }
 172
 173 ErrorOr<OwningBinary<Binary>> createBinary(StringRef Path);
 174 }
 175 }
 176
 177 #endif