예제 #1
0
파일: gold-plugin.cpp 프로젝트: efcs/llvm
static void addModule(LTO &Lto, claimed_file &F, const void *View) {
  MemoryBufferRef BufferRef(StringRef((const char *)View, F.filesize), F.name);
  Expected<std::unique_ptr<InputFile>> ObjOrErr = InputFile::create(BufferRef);

  if (!ObjOrErr)
    message(LDPL_FATAL, "Could not read bitcode from file : %s",
            toString(ObjOrErr.takeError()).c_str());

  unsigned SymNum = 0;
  std::vector<SymbolResolution> Resols(F.syms.size());
  for (ld_plugin_symbol &Sym : F.syms) {
    SymbolResolution &R = Resols[SymNum++];

    ld_plugin_symbol_resolution Resolution =
        (ld_plugin_symbol_resolution)Sym.resolution;

    ResolutionInfo &Res = ResInfo[Sym.name];

    switch (Resolution) {
    case LDPR_UNKNOWN:
      llvm_unreachable("Unexpected resolution");

    case LDPR_RESOLVED_IR:
    case LDPR_RESOLVED_EXEC:
    case LDPR_RESOLVED_DYN:
    case LDPR_PREEMPTED_IR:
    case LDPR_PREEMPTED_REG:
    case LDPR_UNDEF:
      break;

    case LDPR_PREVAILING_DEF_IRONLY:
      R.Prevailing = true;
      break;

    case LDPR_PREVAILING_DEF:
      R.Prevailing = true;
      R.VisibleToRegularObj = true;
      break;

    case LDPR_PREVAILING_DEF_IRONLY_EXP:
      R.Prevailing = true;
      if (!Res.CanOmitFromDynSym)
        R.VisibleToRegularObj = true;
      break;
    }

    if (Resolution != LDPR_RESOLVED_DYN && Resolution != LDPR_UNDEF &&
        (IsExecutable || !Res.DefaultVisibility))
      R.FinalDefinitionInLinkageUnit = true;

    freeSymName(Sym);
  }

  check(Lto.add(std::move(*ObjOrErr), Resols),
        std::string("Failed to link module ") + F.name);
}
예제 #2
0
파일: gold-plugin.cpp 프로젝트: mikaoP/llvm
static void addModule(LTO &Lto, claimed_file &F, const void *View,
                      StringRef Filename) {
  MemoryBufferRef BufferRef(StringRef((const char *)View, F.filesize),
                            Filename);
  Expected<std::unique_ptr<InputFile>> ObjOrErr = InputFile::create(BufferRef);

  if (!ObjOrErr)
    message(LDPL_FATAL, "Could not read bitcode from file : %s",
            toString(ObjOrErr.takeError()).c_str());

  unsigned SymNum = 0;
  std::unique_ptr<InputFile> Input = std::move(ObjOrErr.get());
  auto InputFileSyms = Input->symbols();
  assert(InputFileSyms.size() == F.syms.size());
  std::vector<SymbolResolution> Resols(F.syms.size());
  for (ld_plugin_symbol &Sym : F.syms) {
    const InputFile::Symbol &InpSym = InputFileSyms[SymNum];
    SymbolResolution &R = Resols[SymNum++];

    ld_plugin_symbol_resolution Resolution =
        (ld_plugin_symbol_resolution)Sym.resolution;

    ResolutionInfo &Res = ResInfo[Sym.name];

    switch (Resolution) {
    case LDPR_UNKNOWN:
      llvm_unreachable("Unexpected resolution");

    case LDPR_RESOLVED_IR:
    case LDPR_RESOLVED_EXEC:
    case LDPR_RESOLVED_DYN:
    case LDPR_PREEMPTED_IR:
    case LDPR_PREEMPTED_REG:
    case LDPR_UNDEF:
      break;

    case LDPR_PREVAILING_DEF_IRONLY:
      R.Prevailing = true;
      break;

    case LDPR_PREVAILING_DEF:
      R.Prevailing = true;
      R.VisibleToRegularObj = true;
      break;

    case LDPR_PREVAILING_DEF_IRONLY_EXP:
      R.Prevailing = true;
      if (!Res.CanOmitFromDynSym)
        R.VisibleToRegularObj = true;
      break;
    }

    // If the symbol has a C identifier section name, we need to mark
    // it as visible to a regular object so that LTO will keep it around
    // to ensure the linker generates special __start_<secname> and
    // __stop_<secname> symbols which may be used elsewhere.
    if (isValidCIdentifier(InpSym.getSectionName()))
      R.VisibleToRegularObj = true;

    if (Resolution != LDPR_RESOLVED_DYN && Resolution != LDPR_UNDEF &&
        (IsExecutable || !Res.DefaultVisibility))
      R.FinalDefinitionInLinkageUnit = true;

    freeSymName(Sym);
  }

  check(Lto.add(std::move(Input), Resols),
        std::string("Failed to link module ") + F.name);
}