Function run

example/reflect.cc:76–134

void run() {
  // Initialize.
  std::cout << "Initializing..." << std::endl;
  auto engine = wasm::Engine::make();
  auto store_ = wasm::Store::make(engine.get());
  auto store = store_.get();

  // Load binary.
  std::cout << "Loading binary..." << std::endl;
  std::ifstream file("reflect.wasm");
  file.seekg(0, std::ios_base::end);
  auto file_size = file.tellg();
  file.seekg(0);
  auto binary = wasm::vec<byte_t>::make_uninitialized(file_size);
  file.read(binary.get(), file_size);
  file.close();
  if (file.fail()) {
    std::cout << "> Error loading module!" << std::endl;
    exit(1);
  }

  // Compile.
  std::cout << "Compiling module..." << std::endl;
  auto module = wasm::Module::make(store, binary);
  if (!module) {
    std::cout << "> Error compiling module!" << std::endl;
    exit(1);
  }

  // Instantiate.
  std::cout << "Instantiating module..." << std::endl;
  auto imports = wasm::vec<wasm::Extern*>::make();
  auto instance = wasm::Instance::make(store, module.get(), imports);
  if (!instance) {
    std::cout << "> Error instantiating module!" << std::endl;
    exit(1);
  }

  // Extract exports.
  std::cout << "Extracting export..." << std::endl;
  auto export_types = module->exports();
  auto exports = instance->exports();
  assert(exports.size() == export_types.size());

  for (size_t i = 0; i < exports.size(); ++i) {
    assert(exports[i]->kind() == export_types[i]->type()->kind());
    std::cout << "> export " << i << " " << export_types[i]->name() << std::endl;
    std::cout << ">> initial: " << *export_types[i]->type() << std::endl;
    std::cout << ">> current: " << *exports[i]->type() << std::endl;
    if (exports[i]->kind() == wasm::ExternKind::FUNC) {
      auto func = exports[i]->func();
      std::cout << ">> in-arity: " << func->param_arity();
      std::cout << ", out-arity: " << func->result_arity() << std::endl;
    }
  }

  // Shut down.
  std::cout << "Shutting down..." << std::endl;