wasmer/lib/runtime-c-api/tests/test-module-serialize.c

#include <stdio.h>
#include "../wasmer.h"
#include <assert.h>
#include <stdint.h>

int main()
{
    // Read the wasm file bytes
    FILE *file = fopen("sum.wasm", "r");
    fseek(file, 0, SEEK_END);
    long len = ftell(file);
    uint8_t *bytes = malloc(len);
    fseek(file, 0, SEEK_SET);
    fread(bytes, 1, len, file);
    fclose(file);

    wasmer_module_t *module_one = NULL;
    wasmer_result_t compile_result = wasmer_compile(&module_one, bytes, len);
    printf("Compile result: %d\n", compile_result);
    assert(compile_result == WASMER_OK);

    wasmer_serialized_module_t *serialized_module = NULL;
    wasmer_result_t serialize_result = wasmer_module_serialize(&serialized_module, module_one);
    printf("Serialize result: %d\n", serialize_result);
    assert(serialize_result == WASMER_OK);

    wasmer_byte_array serialized_module_bytes = wasmer_serialized_module_bytes(serialized_module);
    printf("Serialized module pointer: %p\n", serialized_module_bytes.bytes);
    printf("Serialized module length: %d\n", serialized_module_bytes.bytes_len);
    assert(serialized_module_bytes.bytes != NULL);
    assert(serialized_module_bytes.bytes_len > 8);
    assert(serialized_module_bytes.bytes[0] == 'W');
    assert(serialized_module_bytes.bytes[1] == 'A');
    assert(serialized_module_bytes.bytes[2] == 'S');
    assert(serialized_module_bytes.bytes[3] == 'M');
    assert(serialized_module_bytes.bytes[4] == 'E');
    assert(serialized_module_bytes.bytes[5] == 'R');

    wasmer_module_t *module_two = NULL;
    wasmer_result_t unserialize_result = wasmer_module_deserialize(&module_two, serialized_module);
    assert(unserialize_result == WASMER_OK);

    wasmer_import_t imports[] = {};
    wasmer_instance_t *instance = NULL;
    wasmer_result_t instantiate_result = wasmer_module_instantiate(module_two, &instance, imports, 0);
    printf("Instantiate result: %d\n", compile_result);
    assert(instantiate_result == WASMER_OK);

    wasmer_value_t param_one;
    param_one.tag = WASM_I32;
    param_one.value.I32 = 7;
    wasmer_value_t param_two;
    param_two.tag = WASM_I32;
    param_two.value.I32 = 8;
    wasmer_value_t params[] = {param_one, param_two};

    wasmer_value_t result_one;
    wasmer_value_t results[] = {result_one};

    wasmer_result_t call_result = wasmer_instance_call(instance, "sum", params, 2, results, 1);
    printf("Call result:  %d\n", call_result);
    printf("Result: %d\n", results[0].value.I32);
    assert(results[0].value.I32 == 15);
    assert(call_result == WASMER_OK);

    wasmer_serialized_module_t *serialized_module_two = NULL;
    wasmer_result_t serialized_module_from_bytes_result = wasmer_serialized_module_from_bytes(&serialized_module_two, &serialized_module_bytes);
    assert(serialized_module_from_bytes_result == WASMER_OK);

    wasmer_module_t *module_three = NULL;
    wasmer_result_t unserialized_result_two = wasmer_module_deserialize(&module_three, serialized_module_two);
    assert(unserialized_result_two == WASMER_OK);

    wasmer_instance_t *instance_two = NULL;
    wasmer_result_t instantiate_result_two = wasmer_module_instantiate(module_three, &instance, imports, 0);
    assert(instantiate_result_two == WASMER_OK);

    printf("Destroy the serialized module\n");
    wasmer_serialized_module_destroy(serialized_module);
    wasmer_serialized_module_destroy(serialized_module_two);

    printf("Destroy instance\n");
    wasmer_instance_destroy(instance);

    printf("Destroy modules\n");
    wasmer_module_destroy(module_one);
    wasmer_module_destroy(module_two);
    return 0;
}