C++ ModuleSpec::GetFileSpec方法代码示例

Error ModuleCache::Get(const FileSpec &root_dir_spec, const char *hostname,
                       const ModuleSpec &module_spec,
                       ModuleSP &cached_module_sp, bool *did_create_ptr) {
  const auto find_it =
      m_loaded_modules.find(module_spec.GetUUID().GetAsString());
  if (find_it != m_loaded_modules.end()) {
    cached_module_sp = (*find_it).second.lock();
    if (cached_module_sp)
      return Error();
    m_loaded_modules.erase(find_it);
  }

  const auto module_spec_dir =
      GetModuleDirectory(root_dir_spec, module_spec.GetUUID());
  const auto module_file_path = JoinPath(
      module_spec_dir, module_spec.GetFileSpec().GetFilename().AsCString());

  if (!module_file_path.Exists())
    return Error("Module %s not found", module_file_path.GetPath().c_str());
  if (module_file_path.GetByteSize() != module_spec.GetObjectSize())
    return Error("Module %s has invalid file size",
                 module_file_path.GetPath().c_str());

  // We may have already cached module but downloaded from an another host - in
  // this case let's create a link to it.
  auto error = CreateHostSysRootModuleLink(root_dir_spec, hostname,
                                           module_spec.GetFileSpec(),
                                           module_file_path, false);
  if (error.Fail())
    return Error("Failed to create link to %s: %s",
                 module_file_path.GetPath().c_str(), error.AsCString());

  auto cached_module_spec(module_spec);
  cached_module_spec.GetUUID().Clear(); // Clear UUID since it may contain md5
                                        // content hash instead of real UUID.
  cached_module_spec.GetFileSpec() = module_file_path;
  cached_module_spec.GetPlatformFileSpec() = module_spec.GetFileSpec();

  error = ModuleList::GetSharedModule(cached_module_spec, cached_module_sp,
                                      nullptr, nullptr, did_create_ptr, false);
  if (error.Fail())
    return error;

  FileSpec symfile_spec = GetSymbolFileSpec(cached_module_sp->GetFileSpec());
  if (symfile_spec.Exists())
    cached_module_sp->SetSymbolFileFileSpec(symfile_spec);

  m_loaded_modules.insert(
      std::make_pair(module_spec.GetUUID().GetAsString(), cached_module_sp));

  return Error();
}

Error
PlatformDarwinKernel::GetSharedModule (const ModuleSpec &module_spec,
                                       ModuleSP &module_sp,
                                       const FileSpecList *module_search_paths_ptr,
                                       ModuleSP *old_module_sp_ptr,
                                       bool *did_create_ptr)
{
    Error error;
    module_sp.reset();
    const FileSpec &platform_file = module_spec.GetFileSpec();

    // Treat the file's path as a kext bundle ID (e.g. "com.apple.driver.AppleIRController") and search our kext index.
    std::string kext_bundle_id = platform_file.GetPath();
    if (!kext_bundle_id.empty())
    {
        ConstString kext_bundle_cs(kext_bundle_id.c_str());
        if (m_name_to_kext_path_map.count(kext_bundle_cs) > 0)
        {
            for (BundleIDToKextIterator it = m_name_to_kext_path_map.begin (); it != m_name_to_kext_path_map.end (); ++it)
            {
                if (it->first == kext_bundle_cs)
                {
                    error = ExamineKextForMatchingUUID (it->second, module_spec.GetUUID(), module_spec.GetArchitecture(), module_sp);
                    if (module_sp.get())
                    {
                        return error;
                    }
                }
            }
        }
    }

    // Else fall back to treating the file's path as an actual file path - defer to PlatformDarwin's GetSharedModule.
    return PlatformDarwin::GetSharedModule (module_spec, module_sp, module_search_paths_ptr, old_module_sp_ptr, did_create_ptr);
}

Error PlatformFreeBSD::GetSharedModule(
    const ModuleSpec &module_spec, Process *process, ModuleSP &module_sp,
    const FileSpecList *module_search_paths_ptr, ModuleSP *old_module_sp_ptr,
    bool *did_create_ptr) {
  Error error;
  module_sp.reset();

  if (IsRemote()) {
    // If we have a remote platform always, let it try and locate
    // the shared module first.
    if (m_remote_platform_sp) {
      error = m_remote_platform_sp->GetSharedModule(
          module_spec, process, module_sp, module_search_paths_ptr,
          old_module_sp_ptr, did_create_ptr);
    }
  }

  if (!module_sp) {
    // Fall back to the local platform and find the file locally
    error = Platform::GetSharedModule(module_spec, process, module_sp,
                                      module_search_paths_ptr,
                                      old_module_sp_ptr, did_create_ptr);
  }
  if (module_sp)
    module_sp->SetPlatformFileSpec(module_spec.GetFileSpec());
  return error;
}

Error
ModuleCache::Put (const FileSpec &root_dir_spec,
                  const char *hostname,
                  const ModuleSpec &module_spec,
                  const FileSpec &tmp_file)
{
    const auto module_spec_dir = GetModuleDirectory (root_dir_spec, module_spec.GetUUID ());
    auto error = MakeDirectory (module_spec_dir);
    if (error.Fail ())
        return error;

    const auto module_file_path = JoinPath (module_spec_dir, module_spec.GetFileSpec ().GetFilename ().AsCString ());

    const auto tmp_file_path = tmp_file.GetPath ();
    const auto err_code = llvm::sys::fs::copy_file (tmp_file_path.c_str (), module_file_path.GetPath ().c_str ());
    if (err_code)
    {
        error.SetErrorStringWithFormat ("failed to copy file %s to %s: %s",
                                        tmp_file_path.c_str (),
                                        module_file_path.GetPath ().c_str (),
                                        err_code.message ().c_str ());
    }

    // Create sysroot link to a module.
    const auto sysroot_module_path_spec = GetHostSysRootModulePath (root_dir_spec, hostname, module_spec.GetFileSpec ());
    return CreateHostSysRootModuleSymLink (sysroot_module_path_spec, module_file_path);
}

Error PlatformiOSSimulator::GetSharedModule(
    const ModuleSpec &module_spec, Process *process, ModuleSP &module_sp,
    const FileSpecList *module_search_paths_ptr, ModuleSP *old_module_sp_ptr,
    bool *did_create_ptr) {
    // For iOS, the SDK files are all cached locally on the host
    // system. So first we ask for the file in the cached SDK,
    // then we attempt to get a shared module for the right architecture
    // with the right UUID.
    Error error;
    ModuleSpec platform_module_spec(module_spec);
    const FileSpec &platform_file = module_spec.GetFileSpec();
    error = GetSymbolFile(platform_file, module_spec.GetUUIDPtr(),
                          platform_module_spec.GetFileSpec());
    if (error.Success()) {
        error = ResolveExecutable(platform_module_spec, module_sp,
                                  module_search_paths_ptr);
    } else {
        const bool always_create = false;
        error = ModuleList::GetSharedModule(
                    module_spec, module_sp, module_search_paths_ptr, old_module_sp_ptr,
                    did_create_ptr, always_create);
    }
    if (module_sp)
        module_sp->SetPlatformFileSpec(platform_file);

    return error;
}

Error
PlatformDarwinKernel::GetSharedModule (const ModuleSpec &module_spec,
                                       Process *process,
                                       ModuleSP &module_sp,
                                       const FileSpecList *module_search_paths_ptr,
                                       ModuleSP *old_module_sp_ptr,
                                       bool *did_create_ptr)
{
    Error error;
    module_sp.reset();
    const FileSpec &platform_file = module_spec.GetFileSpec();

    // Treat the file's path as a kext bundle ID (e.g. "com.apple.driver.AppleIRController") and search our kext index.
    std::string kext_bundle_id = platform_file.GetPath();
    if (!kext_bundle_id.empty())
    {
        ConstString kext_bundle_cs(kext_bundle_id.c_str());
        if (m_name_to_kext_path_map.count(kext_bundle_cs) > 0)
        {
            for (BundleIDToKextIterator it = m_name_to_kext_path_map.begin (); it != m_name_to_kext_path_map.end (); ++it)
            {
                if (it->first == kext_bundle_cs)
                {
                    error = ExamineKextForMatchingUUID (it->second, module_spec.GetUUID(), module_spec.GetArchitecture(), module_sp);
                    if (module_sp.get())
                    {
                        return error;
                    }
                }
            }
        }
    }

    if (kext_bundle_id.compare("mach_kernel") == 0 && module_spec.GetUUID().IsValid())
    {
        for (auto possible_kernel : m_kernel_binaries)
        {
            if (possible_kernel.Exists())
            {
                ModuleSpec kern_spec (possible_kernel);
                kern_spec.GetUUID() = module_spec.GetUUID();
                ModuleSP module_sp (new Module (kern_spec));
                if (module_sp && module_sp->GetObjectFile() && module_sp->MatchesModuleSpec (kern_spec))
                {
                    Error error;
                    error = ModuleList::GetSharedModule (kern_spec, module_sp, NULL, NULL, NULL);
                    if (module_sp && module_sp->GetObjectFile())
                    {
                        return error;
                    }
                }
            }
        }
    }

    // Else fall back to treating the file's path as an actual file path - defer to PlatformDarwin's GetSharedModule.
    return PlatformDarwin::GetSharedModule (module_spec, process, module_sp, module_search_paths_ptr, old_module_sp_ptr, did_create_ptr);
}

static bool
GetModuleSpecInfoFromUUIDDictionary (CFDictionaryRef uuid_dict, ModuleSpec &module_spec)
{
    bool success = false;
    if (uuid_dict != NULL && CFGetTypeID (uuid_dict) == CFDictionaryGetTypeID ())
    {
        std::string str;
        CFStringRef cf_str;
        
        cf_str = (CFStringRef)CFDictionaryGetValue ((CFDictionaryRef) uuid_dict, CFSTR("DBGSymbolRichExecutable"));
        if (cf_str && CFGetTypeID (cf_str) == CFStringGetTypeID ())
        {
            if (CFCString::FileSystemRepresentation(cf_str, str))
                module_spec.GetFileSpec().SetFile (str.c_str(), true);
        }
        
        cf_str = (CFStringRef)CFDictionaryGetValue ((CFDictionaryRef) uuid_dict, CFSTR("DBGDSYMPath"));
        if (cf_str && CFGetTypeID (cf_str) == CFStringGetTypeID ())
        {
            if (CFCString::FileSystemRepresentation(cf_str, str))
            {
                module_spec.GetSymbolFileSpec().SetFile (str.c_str(), true);
                success = true;
            }
        }
        
        cf_str = (CFStringRef)CFDictionaryGetValue ((CFDictionaryRef) uuid_dict, CFSTR("DBGArchitecture"));
        if (cf_str && CFGetTypeID (cf_str) == CFStringGetTypeID ())
        {
            if (CFCString::FileSystemRepresentation(cf_str, str))
                module_spec.GetArchitecture().SetTriple(str.c_str());
        }

        std::string DBGBuildSourcePath;
        std::string DBGSourcePath;

        cf_str = (CFStringRef)CFDictionaryGetValue ((CFDictionaryRef) uuid_dict, CFSTR("DBGBuildSourcePath"));
        if (cf_str && CFGetTypeID (cf_str) == CFStringGetTypeID ())
        {
            CFCString::FileSystemRepresentation(cf_str, DBGBuildSourcePath);
        }

        cf_str = (CFStringRef)CFDictionaryGetValue ((CFDictionaryRef) uuid_dict, CFSTR("DBGSourcePath"));
        if (cf_str && CFGetTypeID (cf_str) == CFStringGetTypeID ())
        {
            CFCString::FileSystemRepresentation(cf_str, DBGSourcePath);
        }
        
        if (!DBGBuildSourcePath.empty() && !DBGSourcePath.empty())
        {
            module_spec.GetSourceMappingList().Append (ConstString(DBGBuildSourcePath.c_str()), ConstString(DBGSourcePath.c_str()), true);
        }
    }
    return success;
}

Error
PlatformRemoteGDBServer::ResolveExecutable (const ModuleSpec &module_spec,
                                            lldb::ModuleSP &exe_module_sp,
                                            const FileSpecList *module_search_paths_ptr)
{
    Error error;
    //error.SetErrorString ("PlatformRemoteGDBServer::ResolveExecutable() is unimplemented");
    if (m_gdb_client.GetFileExists(module_spec.GetFileSpec()))
        return error;
    // TODO: get the remote end to somehow resolve this file
    error.SetErrorString("file not found on remote end");
    return error;
}

Module::Module (const ModuleSpec &module_spec) :
    m_mutex (Mutex::eMutexTypeRecursive),
    m_mod_time (module_spec.GetFileSpec().GetModificationTime()),
    m_arch (module_spec.GetArchitecture()),
    m_uuid (),
    m_file (module_spec.GetFileSpec()),
    m_platform_file(module_spec.GetPlatformFileSpec()),
    m_symfile_spec (module_spec.GetSymbolFileSpec()),
    m_object_name (module_spec.GetObjectName()),
    m_object_offset (module_spec.GetObjectOffset()),
    m_objfile_sp (),
    m_symfile_ap (),
    m_ast (),
    m_source_mappings (),
    m_did_load_objfile (false),
    m_did_load_symbol_vendor (false),
    m_did_parse_uuid (false),
    m_did_init_ast (false),
    m_is_dynamic_loader_module (false),
    m_file_has_changed (false),
    m_first_file_changed_log (false)
{
    // Scope for locker below...
    {
        Mutex::Locker locker (GetAllocationModuleCollectionMutex());
        GetModuleCollection().push_back(this);
    }
    
    LogSP log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_OBJECT|LIBLLDB_LOG_MODULES));
    if (log)
        log->Printf ("%p Module::Module((%s) '%s/%s%s%s%s')",
                     this,
                     m_arch.GetArchitectureName(),
                     m_file.GetDirectory().AsCString(""),
                     m_file.GetFilename().AsCString(""),
                     m_object_name.IsEmpty() ? "" : "(",
                     m_object_name.IsEmpty() ? "" : m_object_name.AsCString(""),
                     m_object_name.IsEmpty() ? "" : ")");
}

Error
ModuleCache::Get (const FileSpec &root_dir_spec,
                  const char *hostname,
                  const ModuleSpec &module_spec,
                  ModuleSP &cached_module_sp,
                  bool *did_create_ptr)
{
    const auto find_it = m_loaded_modules.find (module_spec.GetUUID ().GetAsString());
    if (find_it != m_loaded_modules.end ())
    {
        cached_module_sp = (*find_it).second.lock ();
        if (cached_module_sp)
            return Error ();
        m_loaded_modules.erase (find_it);
    }

    const auto module_spec_dir = GetModuleDirectory (root_dir_spec,  module_spec.GetUUID ());
    const auto module_file_path = JoinPath (module_spec_dir, module_spec.GetFileSpec ().GetFilename ().AsCString ());

    if (!module_file_path.Exists ())
        return Error ("module %s not found", module_file_path.GetPath ().c_str ());

    // We may have already cached module but downloaded from an another host - in this case let's create a symlink to it.
    const auto sysroot_module_path_spec = GetHostSysRootModulePath (root_dir_spec, hostname, module_spec.GetFileSpec ());
    if (!sysroot_module_path_spec.Exists ())
        CreateHostSysRootModuleSymLink (sysroot_module_path_spec, module_spec.GetFileSpec ());

    auto cached_module_spec (module_spec);
    cached_module_spec.GetUUID ().Clear ();  // Clear UUID since it may contain md5 content hash instead of real UUID.
    cached_module_spec.GetFileSpec () = module_file_path;
    cached_module_spec.GetPlatformFileSpec () = module_spec.GetFileSpec ();
    cached_module_sp.reset (new Module (cached_module_spec));
    if (did_create_ptr)
        *did_create_ptr = true;

    m_loaded_modules.insert (std::make_pair (module_spec.GetUUID ().GetAsString (), cached_module_sp));

    return Error ();
}

bool
Module::MatchesModuleSpec (const ModuleSpec &module_ref)
{
    const UUID &uuid = module_ref.GetUUID();
    
    if (uuid.IsValid())
    {
        // If the UUID matches, then nothing more needs to match...
        if (uuid == GetUUID())
            return true;
        else
            return false;
    }
    
    const FileSpec &file_spec = module_ref.GetFileSpec();
    if (file_spec)
    {
        if (!FileSpec::Equal (file_spec, m_file, file_spec.GetDirectory()))
            return false;
    }

    const FileSpec &platform_file_spec = module_ref.GetPlatformFileSpec();
    if (platform_file_spec)
    {
        if (!FileSpec::Equal (platform_file_spec, GetPlatformFileSpec (), platform_file_spec.GetDirectory()))
            return false;
    }
    
    const ArchSpec &arch = module_ref.GetArchitecture();
    if (arch.IsValid())
    {
        if (m_arch != arch)
            return false;
    }
    
    const ConstString &object_name = module_ref.GetObjectName();
    if (object_name)
    {
        if (object_name != GetObjectName())
            return false;
    }
    return true;
}

ModuleSpec Symbols::LocateExecutableObjectFile(const ModuleSpec &module_spec) {
  ModuleSpec result;
  const FileSpec *exec_fspec = module_spec.GetFileSpecPtr();
  const ArchSpec *arch = module_spec.GetArchitecturePtr();
  const UUID *uuid = module_spec.GetUUIDPtr();
  Timer scoped_timer(
      LLVM_PRETTY_FUNCTION,
      "LocateExecutableObjectFile (file = %s, arch = %s, uuid = %p)",
      exec_fspec ? exec_fspec->GetFilename().AsCString("<NULL>") : "<NULL>",
      arch ? arch->GetArchitectureName() : "<NULL>", (const void *)uuid);

  ModuleSpecList module_specs;
  ModuleSpec matched_module_spec;
  if (exec_fspec &&
      ObjectFile::GetModuleSpecifications(*exec_fspec, 0, 0, module_specs) &&
      module_specs.FindMatchingModuleSpec(module_spec, matched_module_spec)) {
    result.GetFileSpec() = exec_fspec;
  } else {
    LocateMacOSXFilesUsingDebugSymbols(module_spec, result);
  }
  return result;
}

Error
ModuleCache::GetAndPut (const FileSpec &root_dir_spec,
                        const char *hostname,
                        const ModuleSpec &module_spec,
                        const ModuleDownloader &module_downloader,
                        const SymfileDownloader &symfile_downloader,
                        lldb::ModuleSP &cached_module_sp,
                        bool *did_create_ptr)
{
    const auto module_spec_dir = GetModuleDirectory (root_dir_spec, module_spec.GetUUID ());
    auto error = MakeDirectory (module_spec_dir);
    if (error.Fail ())
        return error;

    // Open lock file.
    const auto lock_file_spec = JoinPath (module_spec_dir, kLockFileName);
    File lock_file (lock_file_spec, File::eOpenOptionWrite | File::eOpenOptionCanCreate | File::eOpenOptionCloseOnExec);
    if (!lock_file)
    {
        error.SetErrorToErrno ();
        return Error("Failed to open lock file %s: %s", lock_file_spec.GetPath ().c_str (), error.AsCString ());
    }
    LockFile lock (lock_file.GetDescriptor ());
    error = lock.WriteLock (0, 1);
    if (error.Fail ())
        return Error("Failed to lock file %s:%s", lock_file_spec.GetPath ().c_str (), error.AsCString ());

    // Check local cache for a module.
    error = Get (root_dir_spec, hostname, module_spec, cached_module_sp, did_create_ptr);
    if (error.Success ())
        return error;

    const auto tmp_download_file_spec = JoinPath (module_spec_dir, kTempFileName);
    error = module_downloader (module_spec, tmp_download_file_spec);
    llvm::FileRemover tmp_file_remover (tmp_download_file_spec.GetPath ().c_str ());
    if (error.Fail ())
        return Error("Failed to download module: %s", error.AsCString ());

    // Put downloaded file into local module cache.
    error = Put (root_dir_spec, hostname, module_spec, tmp_download_file_spec, module_spec.GetFileSpec ());
    if (error.Fail ())
        return Error ("Failed to put module into cache: %s", error.AsCString ());

    tmp_file_remover.releaseFile ();
    error = Get (root_dir_spec, hostname, module_spec, cached_module_sp, did_create_ptr);
    if (error.Fail ())
        return error;

    // Fetching a symbol file for the module
    const auto tmp_download_sym_file_spec = JoinPath (module_spec_dir, kTempSymFileName);
    error = symfile_downloader (cached_module_sp, tmp_download_sym_file_spec);
    llvm::FileRemover tmp_symfile_remover (tmp_download_sym_file_spec.GetPath ().c_str ());
    if (error.Fail ())
        // Failed to download a symfile but fetching the module was successful. The module might
        // contain the neccessary symbols and the debugging is also possible without a symfile.
        return Error ();

    FileSpec symfile_spec = GetSymbolFileSpec (cached_module_sp->GetFileSpec ());
    error = Put (root_dir_spec, hostname, module_spec, tmp_download_sym_file_spec, symfile_spec);
    if (error.Fail ())
        return Error ("Failed to put symbol file into cache: %s", error.AsCString ());
    
    tmp_symfile_remover.releaseFile();

    cached_module_sp->SetSymbolFileFileSpec (symfile_spec);
    return Error ();
}

Error PlatformFreeBSD::ResolveExecutable(
    const ModuleSpec &module_spec, lldb::ModuleSP &exe_module_sp,
    const FileSpecList *module_search_paths_ptr) {
  Error error;
  // Nothing special to do here, just use the actual file and architecture

  char exe_path[PATH_MAX];
  ModuleSpec resolved_module_spec(module_spec);

  if (IsHost()) {
    // If we have "ls" as the module_spec's file, resolve the executable
    // location based on
    // the current path variables
    if (!resolved_module_spec.GetFileSpec().Exists()) {
      module_spec.GetFileSpec().GetPath(exe_path, sizeof(exe_path));
      resolved_module_spec.GetFileSpec().SetFile(exe_path, true);
    }

    if (!resolved_module_spec.GetFileSpec().Exists())
      resolved_module_spec.GetFileSpec().ResolveExecutableLocation();

    if (resolved_module_spec.GetFileSpec().Exists())
      error.Clear();
    else {
      error.SetErrorStringWithFormat(
          "unable to find executable for '%s'",
          resolved_module_spec.GetFileSpec().GetPath().c_str());
    }
  } else {
    if (m_remote_platform_sp) {
      error =
          GetCachedExecutable(resolved_module_spec, exe_module_sp,
                              module_search_paths_ptr, *m_remote_platform_sp);
    } else {
      // We may connect to a process and use the provided executable (Don't use
      // local $PATH).

      // Resolve any executable within a bundle on MacOSX
      Host::ResolveExecutableInBundle(resolved_module_spec.GetFileSpec());

      if (resolved_module_spec.GetFileSpec().Exists()) {
        error.Clear();
      } else {
        error.SetErrorStringWithFormat(
            "the platform is not currently connected, and '%s' doesn't exist "
            "in the system root.",
            resolved_module_spec.GetFileSpec().GetPath().c_str());
      }
    }
  }

  if (error.Success()) {
    if (resolved_module_spec.GetArchitecture().IsValid()) {
      error = ModuleList::GetSharedModule(resolved_module_spec, exe_module_sp,
                                          module_search_paths_ptr, NULL, NULL);

      if (!exe_module_sp || exe_module_sp->GetObjectFile() == NULL) {
        exe_module_sp.reset();
        error.SetErrorStringWithFormat(
            "'%s' doesn't contain the architecture %s",
            resolved_module_spec.GetFileSpec().GetPath().c_str(),
            resolved_module_spec.GetArchitecture().GetArchitectureName());
      }
    } else {
      // No valid architecture was specified, ask the platform for
      // the architectures that we should be using (in the correct order)
      // and see if we can find a match that way
      StreamString arch_names;
      for (uint32_t idx = 0; GetSupportedArchitectureAtIndex(
               idx, resolved_module_spec.GetArchitecture());
           ++idx) {
        error =
            ModuleList::GetSharedModule(resolved_module_spec, exe_module_sp,
                                        module_search_paths_ptr, NULL, NULL);
        // Did we find an executable using one of the
        if (error.Success()) {
          if (exe_module_sp && exe_module_sp->GetObjectFile())
            break;
          else
            error.SetErrorToGenericError();
        }

        if (idx > 0)
          arch_names.PutCString(", ");
        arch_names.PutCString(
            resolved_module_spec.GetArchitecture().GetArchitectureName());
      }

      if (error.Fail() || !exe_module_sp) {
        if (resolved_module_spec.GetFileSpec().Readable()) {
          error.SetErrorStringWithFormat(
              "'%s' doesn't contain any '%s' platform architectures: %s",
              resolved_module_spec.GetFileSpec().GetPath().c_str(),
              GetPluginName().GetCString(), arch_names.GetData());
        } else {
          error.SetErrorStringWithFormat(
              "'%s' is not readable",
              resolved_module_spec.GetFileSpec().GetPath().c_str());
        }
      }
//.........这里部分代码省略.........

Error
PlatformRemoteiOS::GetSharedModule (const ModuleSpec &module_spec,
                                    ModuleSP &module_sp,
                                    const FileSpecList *module_search_paths_ptr,
                                    ModuleSP *old_module_sp_ptr,
                                    bool *did_create_ptr)
{
    // For iOS, the SDK files are all cached locally on the host
    // system. So first we ask for the file in the cached SDK,
    // then we attempt to get a shared module for the right architecture
    // with the right UUID.
    const FileSpec &platform_file = module_spec.GetFileSpec();

    FileSpec local_file;
    const UUID *module_uuid_ptr = module_spec.GetUUIDPtr();
    Error error (GetSymbolFile (platform_file, module_uuid_ptr, local_file));
    if (error.Success())
    {
        error = ResolveExecutable (local_file, module_spec.GetArchitecture(), module_sp, NULL);
        if (module_sp && ((module_uuid_ptr == NULL) || (module_sp->GetUUID() == *module_uuid_ptr)))
        {
            //printf ("found in user specified SDK\n");
            error.Clear();
            return error;
        }

        char platform_file_path[PATH_MAX];
        if (platform_file.GetPath(platform_file_path, sizeof(platform_file_path)))
        {
            FileSpec local_file;
            const uint32_t num_sdk_infos = m_sdk_directory_infos.size();
            // Try the last SDK index if it is set as most files from an SDK
            // will tend to be valid in that same SDK.
            if (m_last_module_sdk_idx < num_sdk_infos)
            {
                if (GetFileInSDK (platform_file_path, m_last_module_sdk_idx, local_file))
                {
                    //printf ("sdk[%u] last: '%s'\n", m_last_module_sdk_idx, local_file.GetPath().c_str());
                    module_sp.reset();
                    error = ResolveExecutable (local_file,
                                               module_spec.GetArchitecture(),
                                               module_sp,
                                               NULL);
                    if (module_sp && ((module_uuid_ptr == NULL) || (module_sp->GetUUID() == *module_uuid_ptr)))
                    {
                        //printf ("sdk[%u] last found\n", m_last_module_sdk_idx);
                        error.Clear();
                        return error;
                    }
                }
            }
            
            // First try for an exact match of major, minor and update
            for (uint32_t sdk_idx=0; sdk_idx<num_sdk_infos; ++sdk_idx)
            {
                if (m_last_module_sdk_idx == sdk_idx)
                {
                    // Skip the last module SDK index if we already searched
                    // it above
                    continue;
                }
                if (GetFileInSDK (platform_file_path, sdk_idx, local_file))
                {
                    //printf ("sdk[%u]: '%s'\n", sdk_idx, local_file.GetPath().c_str());
                    
                    error = ResolveExecutable (local_file,
                                               module_spec.GetArchitecture(),
                                               module_sp,
                                               NULL);
                    if (module_sp && ((module_uuid_ptr == NULL) || (module_sp->GetUUID() == *module_uuid_ptr)))
                    {
                        // Remember the index of the last SDK that we found a file
                        // in in case the wrong SDK was selected.
                        m_last_module_sdk_idx = sdk_idx;
                        //printf ("sdk[%u]: found (setting last to %u)\n", sdk_idx, m_last_module_sdk_idx);
                        error.Clear();
                        return error;
                    }
                }
            }
        }
        // Not the module we are looking for... Nothing to see here...
        module_sp.reset();
    }
    else
    {
        // This may not be an SDK-related module.  Try whether we can bring in the thing to our local cache.
        error = GetSharedModuleWithLocalCache(module_spec, module_sp, module_search_paths_ptr, old_module_sp_ptr, did_create_ptr);
        if (error.Success())
            return error;
        else
            error.Clear(); // Clear the error and fall-through.
    }

    const bool always_create = false;
    error = ModuleList::GetSharedModule (module_spec, 
                                         module_sp,
                                         module_search_paths_ptr,
                                         old_module_sp_ptr,
                                         did_create_ptr,
//.........这里部分代码省略.........