src/llvm/lib/Object/Object.cpp

   1 //===- Object.cpp - C bindings to the object file library--------*- 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 defines the C bindings to the file-format-independent object
  11 // library.
  12 //
  13 //===----------------------------------------------------------------------===//
  14
  15 #include "llvm/ADT/SmallVector.h"
  16 #include "llvm-c/Object.h"
  17 #include "llvm/Object/ObjectFile.h"
  18
  19 using namespace llvm;
  20 using namespace object;
  21
  22 inline OwningBinary<ObjectFile> *unwrap(LLVMObjectFileRef OF) {
  23   return reinterpret_cast<OwningBinary<ObjectFile> *>(OF);
  24 }
  25
  26 inline LLVMObjectFileRef wrap(const OwningBinary<ObjectFile> *OF) {
  27   return reinterpret_cast<LLVMObjectFileRef>(
  28       const_cast<OwningBinary<ObjectFile> *>(OF));
  29 }
  30
  31 inline section_iterator *unwrap(LLVMSectionIteratorRef SI) {
  32   return reinterpret_cast<section_iterator*>(SI);
  33 }
  34
  35 inline LLVMSectionIteratorRef
  36 wrap(const section_iterator *SI) {
  37   return reinterpret_cast<LLVMSectionIteratorRef>
  38     (const_cast<section_iterator*>(SI));
  39 }
  40
  41 inline symbol_iterator *unwrap(LLVMSymbolIteratorRef SI) {
  42   return reinterpret_cast<symbol_iterator*>(SI);
  43 }
  44
  45 inline LLVMSymbolIteratorRef
  46 wrap(const symbol_iterator *SI) {
  47   return reinterpret_cast<LLVMSymbolIteratorRef>
  48     (const_cast<symbol_iterator*>(SI));
  49 }
  50
  51 inline relocation_iterator *unwrap(LLVMRelocationIteratorRef SI) {
  52   return reinterpret_cast<relocation_iterator*>(SI);
  53 }
  54
  55 inline LLVMRelocationIteratorRef
  56 wrap(const relocation_iterator *SI) {
  57   return reinterpret_cast<LLVMRelocationIteratorRef>
  58     (const_cast<relocation_iterator*>(SI));
  59 }
  60
  61 // ObjectFile creation
  62 LLVMObjectFileRef LLVMCreateObjectFile(LLVMMemoryBufferRef MemBuf) {
  63   std::unique_ptr<MemoryBuffer> Buf(unwrap(MemBuf));
  64   ErrorOr<std::unique_ptr<ObjectFile>> ObjOrErr(
  65       ObjectFile::createObjectFile(Buf->getMemBufferRef()));
  66   std::unique_ptr<ObjectFile> Obj;
  67   if (!ObjOrErr)
  68     return nullptr;
  69
  70   auto *Ret = new OwningBinary<ObjectFile>(std::move(ObjOrErr.get()), std::move(Buf));
  71   return wrap(Ret);
  72 }
  73
  74 void LLVMDisposeObjectFile(LLVMObjectFileRef ObjectFile) {
  75   delete unwrap(ObjectFile);
  76 }
  77
  78 // ObjectFile Section iterators
  79 LLVMSectionIteratorRef LLVMGetSections(LLVMObjectFileRef OF) {
  80   OwningBinary<ObjectFile> *OB = unwrap(OF);
  81   section_iterator SI = OB->getBinary()->section_begin();
  82   return wrap(new section_iterator(SI));
  83 }
  84
  85 void LLVMDisposeSectionIterator(LLVMSectionIteratorRef SI) {
  86   delete unwrap(SI);
  87 }
  88
  89 LLVMBool LLVMIsSectionIteratorAtEnd(LLVMObjectFileRef OF,
  90                                     LLVMSectionIteratorRef SI) {
  91   OwningBinary<ObjectFile> *OB = unwrap(OF);
  92   return (*unwrap(SI) == OB->getBinary()->section_end()) ? 1 : 0;
  93 }
  94
  95 void LLVMMoveToNextSection(LLVMSectionIteratorRef SI) {
  96   ++(*unwrap(SI));
  97 }
  98
  99 void LLVMMoveToContainingSection(LLVMSectionIteratorRef Sect,
 100                                  LLVMSymbolIteratorRef Sym) {
 101   if (std::error_code ec = (*unwrap(Sym))->getSection(*unwrap(Sect)))
 102     report_fatal_error(ec.message());
 103 }
 104
 105 // ObjectFile Symbol iterators
 106 LLVMSymbolIteratorRef LLVMGetSymbols(LLVMObjectFileRef OF) {
 107   OwningBinary<ObjectFile> *OB = unwrap(OF);
 108   symbol_iterator SI = OB->getBinary()->symbol_begin();
 109   return wrap(new symbol_iterator(SI));
 110 }
 111
 112 void LLVMDisposeSymbolIterator(LLVMSymbolIteratorRef SI) {
 113   delete unwrap(SI);
 114 }
 115
 116 LLVMBool LLVMIsSymbolIteratorAtEnd(LLVMObjectFileRef OF,
 117                                    LLVMSymbolIteratorRef SI) {
 118   OwningBinary<ObjectFile> *OB = unwrap(OF);
 119   return (*unwrap(SI) == OB->getBinary()->symbol_end()) ? 1 : 0;
 120 }
 121
 122 void LLVMMoveToNextSymbol(LLVMSymbolIteratorRef SI) {
 123   ++(*unwrap(SI));
 124 }
 125
 126 // SectionRef accessors
 127 const char *LLVMGetSectionName(LLVMSectionIteratorRef SI) {
 128   StringRef ret;
 129   if (std::error_code ec = (*unwrap(SI))->getName(ret))
 130    report_fatal_error(ec.message());
 131   return ret.data();
 132 }
 133
 134 uint64_t LLVMGetSectionSize(LLVMSectionIteratorRef SI) {
 135   return (*unwrap(SI))->getSize();
 136 }
 137
 138 const char *LLVMGetSectionContents(LLVMSectionIteratorRef SI) {
 139   StringRef ret;
 140   if (std::error_code ec = (*unwrap(SI))->getContents(ret))
 141     report_fatal_error(ec.message());
 142   return ret.data();
 143 }
 144
 145 uint64_t LLVMGetSectionAddress(LLVMSectionIteratorRef SI) {
 146   return (*unwrap(SI))->getAddress();
 147 }
 148
 149 LLVMBool LLVMGetSectionContainsSymbol(LLVMSectionIteratorRef SI,
 150                                  LLVMSymbolIteratorRef Sym) {
 151   return (*unwrap(SI))->containsSymbol(**unwrap(Sym));
 152 }
 153
 154 // Section Relocation iterators
 155 LLVMRelocationIteratorRef LLVMGetRelocations(LLVMSectionIteratorRef Section) {
 156   relocation_iterator SI = (*unwrap(Section))->relocation_begin();
 157   return wrap(new relocation_iterator(SI));
 158 }
 159
 160 void LLVMDisposeRelocationIterator(LLVMRelocationIteratorRef SI) {
 161   delete unwrap(SI);
 162 }
 163
 164 LLVMBool LLVMIsRelocationIteratorAtEnd(LLVMSectionIteratorRef Section,
 165                                        LLVMRelocationIteratorRef SI) {
 166   return (*unwrap(SI) == (*unwrap(Section))->relocation_end()) ? 1 : 0;
 167 }
 168
 169 void LLVMMoveToNextRelocation(LLVMRelocationIteratorRef SI) {
 170   ++(*unwrap(SI));
 171 }
 172
 173
 174 // SymbolRef accessors
 175 const char *LLVMGetSymbolName(LLVMSymbolIteratorRef SI) {
 176   StringRef ret;
 177   if (std::error_code ec = (*unwrap(SI))->getName(ret))
 178     report_fatal_error(ec.message());
 179   return ret.data();
 180 }
 181
 182 uint64_t LLVMGetSymbolAddress(LLVMSymbolIteratorRef SI) {
 183   uint64_t ret;
 184   if (std::error_code ec = (*unwrap(SI))->getAddress(ret))
 185     report_fatal_error(ec.message());
 186   return ret;
 187 }
 188
 189 uint64_t LLVMGetSymbolSize(LLVMSymbolIteratorRef SI) {
 190   uint64_t ret;
 191   if (std::error_code ec = (*unwrap(SI))->getSize(ret))
 192     report_fatal_error(ec.message());
 193   return ret;
 194 }
 195
 196 // RelocationRef accessors
 197 uint64_t LLVMGetRelocationAddress(LLVMRelocationIteratorRef RI) {
 198   uint64_t ret;
 199   if (std::error_code ec = (*unwrap(RI))->getAddress(ret))
 200     report_fatal_error(ec.message());
 201   return ret;
 202 }
 203
 204 uint64_t LLVMGetRelocationOffset(LLVMRelocationIteratorRef RI) {
 205   uint64_t ret;
 206   if (std::error_code ec = (*unwrap(RI))->getOffset(ret))
 207     report_fatal_error(ec.message());
 208   return ret;
 209 }
 210
 211 LLVMSymbolIteratorRef LLVMGetRelocationSymbol(LLVMRelocationIteratorRef RI) {
 212   symbol_iterator ret = (*unwrap(RI))->getSymbol();
 213   return wrap(new symbol_iterator(ret));
 214 }
 215
 216 uint64_t LLVMGetRelocationType(LLVMRelocationIteratorRef RI) {
 217   uint64_t ret;
 218   if (std::error_code ec = (*unwrap(RI))->getType(ret))
 219     report_fatal_error(ec.message());
 220   return ret;
 221 }
 222
 223 // NOTE: Caller takes ownership of returned string.
 224 const char *LLVMGetRelocationTypeName(LLVMRelocationIteratorRef RI) {
 225   SmallVector<char, 0> ret;
 226   if (std::error_code ec = (*unwrap(RI))->getTypeName(ret))
 227     report_fatal_error(ec.message());
 228
 229   char *str = static_cast<char*>(malloc(ret.size()));
 230   std::copy(ret.begin(), ret.end(), str);
 231   return str;
 232 }
 233
 234 // NOTE: Caller takes ownership of returned string.
 235 const char *LLVMGetRelocationValueString(LLVMRelocationIteratorRef RI) {
 236   SmallVector<char, 0> ret;
 237   if (std::error_code ec = (*unwrap(RI))->getValueString(ret))
 238     report_fatal_error(ec.message());
 239
 240   char *str = static_cast<char*>(malloc(ret.size()));
 241   std::copy(ret.begin(), ret.end(), str);
 242   return str;
 243 }
 244