Function main

examples/fib-debug/main.c:48–143

                            wasm_trap_t *trap);

int main() {
  // Configuring engine to support generating of DWARF info.
  // lldb can be used to attach to the program and observe
  // original fib-wasm.c source code and variables.
  wasm_config_t *config = wasm_config_new();
  wasmtime_config_debug_info_set(config, true);
  wasmtime_config_cranelift_opt_level_set(config, WASMTIME_OPT_LEVEL_NONE);

  // Initialize.
  printf("Initializing...\n");
  wasm_engine_t *engine = wasm_engine_new_with_config(config);
  wasmtime_store_t *store = wasmtime_store_new(engine, NULL, NULL);
  wasmtime_context_t *context = wasmtime_store_context(store);

#ifdef WASMTIME_TEST_ONLY
  // NOTE: This validation is for wasmtime testing and should not be included in
  // your code.
  if (__jit_debug_descriptor.first_entry != NULL) {
    fprintf(stderr, "FAIL: JIT descriptor is already initialized\n");
    return 1;
  }
#endif

  // Load binary.
  printf("Loading binary...\n");
  FILE *file = fopen("target/wasm32-unknown-unknown/debug/fib.wasm", "rb");
  if (!file) {
    printf("> Error opening module!\n");
    return 1;
  }
  fseek(file, 0L, SEEK_END);
  size_t file_size = ftell(file);
  fseek(file, 0L, SEEK_SET);
  wasm_byte_vec_t binary;
  wasm_byte_vec_new_uninitialized(&binary, file_size);
  if (fread(binary.data, file_size, 1, file) != 1) {
    printf("> Error reading module!\n");
    return 1;
  }
  fclose(file);

  // Compile.
  printf("Compiling module...\n");
  wasmtime_module_t *module = NULL;
  wasmtime_error_t *error =
      wasmtime_module_new(engine, (uint8_t *)binary.data, binary.size, &module);
  if (!module)
    exit_with_error("failed to compile module", error, NULL);
  wasm_byte_vec_delete(&binary);

  // Instantiate.
  printf("Instantiating module...\n");
  wasmtime_instance_t instance;
  wasm_trap_t *trap = NULL;
  error = wasmtime_instance_new(context, module, NULL, 0, &instance, &trap);
  if (error != NULL || trap != NULL)
    exit_with_error("failed to instantiate", error, trap);
  wasmtime_module_delete(module);